Add production dependencies & build

update version 2.0.0 -> 2.2.0 (#255 )
2026-02-12 11:06:53 +08:00 · 2024-06-26 16:46:15 -04:00 · 2024-06-26 16:44:21 -04:00 · 2024-06-26 15:54:53 -04:00 · 2024-06-26 18:18:44 +00:00 · 2024-06-26 14:12:52 -04:00
34 changed files with 38533 additions and 4672 deletions
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -0,0 +1 @@
+*       @julia-actions/reviewers
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -0,0 +1,28 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG] "
+labels: bug
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Workflow file to reproduce the behavior:
+
+```yaml
+
+```
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots/Build logs**
+If applicable, add screenshots to help explain your problem.
+
+If possible, set the repo secret `ACTIONS_STEP_DEBUG` to `true` to [enable debug logs](https://github.com/actions/toolkit/blob/master/docs/action-debugging.md#how-to-access-step-debug-logs) and run the build again for more detailled logs.
+
+**Additional context**
+Add any other context about the problem here.
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -0,0 +1,19 @@
+version: 2
+updates:
+- package-ecosystem: gitsubmodule
+  directory: "/"
+  schedule:
+    interval: monthly
+  open-pull-requests-limit: 99
+
+- package-ecosystem: 'github-actions'
+  directory: '/'
+  schedule:
+    interval: 'monthly'
+  open-pull-requests-limit: 99
+    
+- package-ecosystem: npm
+  directory: "/"
+  schedule:
+    interval: monthly
+  open-pull-requests-limit: 99
--- a/.github/scripts/common-tests.jl
+++ b/.github/scripts/common-tests.jl
@@ -0,0 +1,11 @@
+if !occursin("hostedtoolcache", Sys.BINDIR)
+    error("the wrong julia is being used: $(Sys.BINDIR)")
+end
+if VERSION >= v"1.7.0" # pkgdir was introduced here, and before then mtime wasn't a problem so just skip
+    using Pkg
+    src = pkgdir(Pkg, "src", "Pkg.jl")
+    # mtime is when it's compressed, ctime is when the file is extracted
+    if mtime(src) >= ctime(src)
+        error("source mtime ($(mtime(src))) is not earlier than ctime ($(ctime(src)))")
+    end
+end
--- a/.github/workflows/checkin.yml
+++ b/.github/workflows/checkin.yml
@@ -1,11 +1,22 @@
 name: "PR Checks"
 on: [pull_request, push]

+concurrency:
+  # Skip intermediate builds: all builds except for builds on the `master`, `main`, or `release-*` branches
+  # Cancel intermediate builds: only pull request builds
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/master' || github.ref != 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release-') || github.run_number }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
 jobs:
  check_pr:
    runs-on: ubuntu-latest
+    timeout-minutes: 60
    steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-node@v4
+      with:
+        node-version-file: '.tool-versions'

    - name: "npm ci"
      run: npm ci
--- a/.github/workflows/codeql-analysis.yml
+++ b/.github/workflows/codeql-analysis.yml
@@ -0,0 +1,74 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+concurrency:
+  # Skip intermediate builds: all builds except for builds on the `master`, `main`, or `release-*` branches
+  # Cancel intermediate builds: only pull request builds
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/master' || github.ref != 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release-') || github.run_number }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+on:
+  push:
+    branches: [ master, releases/* ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master ]
+  schedule:
+    - cron: '32 22 * * 6'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    timeout-minutes: 60
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'javascript' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v4
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v3
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v3
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
--- a/.github/workflows/example-builds-defaultarch.yml
+++ b/.github/workflows/example-builds-defaultarch.yml
@@ -0,0 +1,48 @@
+name: Example builds (default arch)
+
+concurrency:
+  # Skip intermediate builds: all builds except for builds on the `master`, `main`, or `release-*` branches
+  # Cancel intermediate builds: only pull request builds
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/master' || github.ref != 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release-') || github.run_number }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+on:
+  push:
+    branches: ['main', 'master', 'releases/*']
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        julia-version: ['1']
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        if: ${{ ! startsWith(github.ref, 'refs/heads/releases') }}
+        with:
+          node-version-file: '.tool-versions'
+
+      - name: "Install dependencies"
+        if: ${{ ! startsWith(github.ref, 'refs/heads/releases') }}
+        run: |
+          npm install
+          npm run build
+          npm run pack
+
+      - name: "Set up Julia"
+        id: setup-julia
+        uses: ./
+        with:
+          version: ${{ matrix.julia-version }}
+      - run: julia --version
+      - run: julia --compile=min -O0 -e 'import InteractiveUtils; InteractiveUtils.versioninfo()'
+      - name: "Check that the correct julia is used and that archive mtimes are maintained"
+        run: julia --startup-file=no --color=yes ./.github/scripts/common-tests.jl
--- a/.github/workflows/example-builds-nightly-defaultarch.yml
+++ b/.github/workflows/example-builds-nightly-defaultarch.yml
@@ -0,0 +1,53 @@
+name: Example builds (nightly, default arch)
+
+concurrency:
+  # Skip intermediate builds: all builds except for builds on the `master`, `main`, or `release-*` branches
+  # Cancel intermediate builds: only pull request builds
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/master' || github.ref != 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release-') || github.run_number }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+on:
+  push:
+    branches: ['main', 'master', 'releases/*']
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        julia-version: [nightly, 1.10-nightly]
+        os:
+          - ubuntu-latest
+          - windows-latest
+          # - macos-11 # Intel
+          - macos-12 # Intel
+          - macos-13 # Intel
+          - macos-14 # Apple Silicon
+          - macos-latest # Currently Intel, but will probably point to Apple Silicon in the future
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        if: ${{ ! startsWith(github.ref, 'refs/heads/releases') }}
+        with:
+          node-version-file: '.tool-versions'
+
+      - name: "Install dependencies"
+        if: ${{ ! startsWith(github.ref, 'refs/heads/releases') }}
+        run: |
+          npm install
+          npm run build
+          npm run pack
+
+      - name: "Set up Julia (${{ matrix.julia-version }})"
+        uses: ./
+        with:
+          version: ${{ matrix.julia-version }}
+      - run: julia --version
+      - run: julia --compile=min -O0 -e 'import InteractiveUtils; InteractiveUtils.versioninfo()'
+      - name: "Check that the correct julia is used and that archive mtimes are maintained"
+        run: julia --startup-file=no --color=yes ./.github/scripts/common-tests.jl
--- a/.github/workflows/example-builds-nightly.yml
+++ b/.github/workflows/example-builds-nightly.yml
@@ -0,0 +1,54 @@
+name: Example builds (nightly)
+
+concurrency:
+  # Skip intermediate builds: all builds except for builds on the `master`, `main`, or `release-*` branches
+  # Cancel intermediate builds: only pull request builds
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/master' || github.ref != 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release-') || github.run_number }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+on:
+  push:
+    branches: ['main', 'master', 'releases/*']
+  pull_request:
+  schedule:
+    - cron: '37 17 * * *'
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        julia-version: [nightly, 1.10-nightly]
+        julia-arch: [x64, x86]
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+        # 32-bit Julia binaries are not available on macOS
+        exclude:
+          - os: macOS-latest
+            julia-arch: x86
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        if: ${{ ! startsWith(github.ref, 'refs/heads/releases') }}
+        with:
+          node-version-file: '.tool-versions'
+
+      - name: "Install dependencies"
+        if: ${{ ! startsWith(github.ref, 'refs/heads/releases') }}
+        run: |
+          npm install
+          npm run build
+          npm run pack
+
+      - name: "Set up Julia (${{ matrix.julia-version }})"
+        uses: ./
+        with:
+          version: ${{ matrix.julia-version }}
+          arch: ${{ matrix.julia-arch }}
+      - run: julia --version
+      - run: julia --compile=min -O0 -e 'import InteractiveUtils; InteractiveUtils.versioninfo()'
+      - name: "Check that the correct julia is used and that archive mtimes are maintained"
+        run: julia --startup-file=no --color=yes ./.github/scripts/common-tests.jl
--- a/.github/workflows/example-builds.yml
+++ b/.github/workflows/example-builds.yml
@@ -0,0 +1,54 @@
+name: Example builds
+
+concurrency:
+  # Skip intermediate builds: all builds except for builds on the `master`, `main`, or `release-*` branches
+  # Cancel intermediate builds: only pull request builds
+  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.ref != 'refs/heads/master' || github.ref != 'refs/heads/main' || startsWith(github.ref, 'refs/heads/release-') || github.run_number }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+on:
+  push:
+    branches: ['main', 'master', 'releases/*']
+  pull_request:
+  workflow_dispatch:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    timeout-minutes: 60
+    strategy:
+      fail-fast: false
+      matrix:
+        julia-version: ['1.0.5', '1.2', '^1.5.0-beta1', '1', 'lts', 'pre']
+        julia-arch: [x64, x86]
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+        # 32-bit Julia binaries are not available on macOS
+        exclude:
+          - os: macOS-latest
+            julia-arch: x86
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - uses: actions/setup-node@v4
+        if: ${{ ! startsWith(github.ref, 'refs/heads/releases') }}
+        with:
+          node-version-file: '.tool-versions'
+
+      - name: "Install dependencies"
+        if: ${{ ! startsWith(github.ref, 'refs/heads/releases') }}
+        run: |
+          npm install
+          npm run build
+          npm run pack
+
+      - name: "Set up Julia"
+        id: setup-julia
+        uses: ./
+        with:
+          version: ${{ matrix.julia-version }}
+          arch: ${{ matrix.julia-arch }}
+      - run: julia --version
+      - run: julia --compile=min -O0 -e 'import InteractiveUtils; InteractiveUtils.versioninfo()'
+      - name: "Check that the correct julia is used and that archive mtimes are maintained"
+        run: julia --startup-file=no --color=yes ./.github/scripts/common-tests.jl
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 node_modules/
 __tests__/runner/*
+!dist/
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "bin"]
+	path = bin
+	url = git@github.com:julia-actions/bin.git
--- a/.tool-versions
+++ b/.tool-versions
@@ -0,0 +1 @@
+nodejs 20.11.1
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -0,0 +1,3 @@
+# Contributing
+
+Please see the README in the [`devdocs/`](devdocs/) folder.
--- a/README.md
+++ b/README.md
@@ -1,33 +1,95 @@
 # setup-julia Action

-[![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=julia-actions/setup-julia)](https://dependabot.com)
+[![CodeQL](https://github.com/julia-actions/setup-julia/workflows/CodeQL/badge.svg)](https://securitylab.github.com/tools/codeql)

 This action sets up a Julia environment for use in actions by downloading a specified version of Julia and adding it to PATH.

 ## Table of Contents
 - [Table of Contents](#table-of-contents)
 - [Usage](#usage)
+  - [Inputs](#inputs)
+  - [Outputs](#outputs)
  - [Basic](#basic)
  - [Julia Versions](#julia-versions)
  - [Matrix Testing](#matrix-testing)
+  - [versioninfo](#versioninfo)
 - [Versioning](#versioning)
- [Future plans & ideas](#future-plans--ideas)
- [Licence info](#licence-info)
+- [Debug logs](#debug-logs)
+- [Third party information](#third-party-information)

 ## Usage

-See [action.yml](action.yml).
+### Inputs

-You can find a list of example workflows making use of this action here: [julia-actions/example-workflows](https://github.com/julia-actions/example-workflows).
+```yaml
+- uses: julia-actions/setup-julia@v2
+  with:
+    # The Julia version that will be installed and added as `julia` to the PATH.
+    # See "Julia Versions" below for a list of valid values.
+    #
+    # Warning: It is strongly recommended to wrap this value in quotes.
+    #          Otherwise, the YAML parser used by GitHub Actions parses certain
+    #          versions as numbers which causes the wrong version to be selected.
+    #          For example, `1.0` may be parsed as `1`.
+    #
+    # Default: '1'
+    version: ''
+
+    # The architecture of the Julia binaries.
+    #
+    # Please note that installing aarch64 binaries only makes sense on self-hosted aarch64 runners.
+    # We currently don't run test builds on that architecture, so we cannot guarantee that the input won't break randomly,
+    # although there is no reason why it would.
+    #
+    # Supported values: x64 | x86 | aarch64 (untested)
+    #
+    # Note: you can use X64, X86, and ARM64 as synonyms for x64, x86, and aarch64, respectively.
+    #
+    # Defaults to the architecture of the runner executing the job.
+    arch: ''
+
+    # Set the display setting for printing InteractiveUtils.versioninfo() after installing.
+    #
+    # Starting Julia and running InteractiveUtils.versioninfo() takes a significant amount of time (1s or ~10% of the total build time in testing),
+    # so you may not want to run it in every build, in particular on paid runners, as this cost will add up quickly.
+    #
+    # See "versioninfo" below for example usage and further explanations.
+    #
+    # Supported values: true | false | never
+    #
+    # true: Always print versioninfo
+    # false: Only print versioninfo for nightly Julia
+    # never: Never print versioninfo
+    #
+    # Default: false
+    show-versioninfo: ''
+```
+
+### Outputs
+
+```yaml
+outputs:
+  # The installed Julia version.
+  # May vary from the version input if a version range was given as input.
+  #
+  # Example output: '1.5.3'
+
+  julia-version: ''
+  # Path to the directory containing the Julia executable.
+  # Equivalent to JULIA_BINDIR: https://docs.julialang.org/en/v1/manual/environment-variables/#JULIA_BINDIR
+  #
+  # Example output: '/opt/hostedtoolcache/julia/1.5.3/x64/bin'
+  julia-bindir: ''
+```

 ### Basic

 ```yaml
 steps:
- uses: actions/checkout@v1.0.0
- uses: julia-actions/setup-julia@v0.2
+- uses: actions/checkout@v4
+- uses: julia-actions/setup-julia@v2
  with:
-    version: 1.0.4
+    version: '1.10'
 - run: julia -e 'println("Hello, World!")'
 ```

@@ -35,22 +97,58 @@ steps:

 You can either specify specific Julia versions or version ranges. If you specify a version range, the **highest** available Julia version that matches the range will be selected.

-**Warning:** It is strongly recommended to wrap versions in quotes. Otherwise, the YAML parser used by GitHub Actions parses certain versions as numbers which causes the wrong version to be selected. For example, `1.0` is parsed as `1`.
+> **Warning**
+>
+> It is strongly recommended to wrap versions in quotes. Otherwise, the YAML parser used by GitHub Actions parses certain versions as numbers which causes the wrong version to be selected. For example, `1.0` may be parsed as `1`.

 #### Examples

- `1.2.0` is a valid semver version. The action will try to download exactly this version. If it's not available, the build step will fail.
- `1.0` is a version range that will match the highest available Julia version that starts with `1.0`, e.g. `1.0.5`.
- `^1.3.0-rc1` is a caret version range that includes preleases. It matches all versions `≥ 1.3.0-rc1` and `< 1.4.0`.
+- `'1.2.0'` is a valid semver version. The action will try to download exactly this version. If it's not available, the build step will fail.
+- `'1.0'` is a version range that will match the highest available Julia version that starts with `1.0`, e.g. `1.0.5`, excluding pre-releases.
+- `'^1.3.0-rc1'` is a **caret** version range that includes pre-releases of `1.3.0` starting at `rc1`. It matches all versions `≥ 1.3.0-rc1` and `< 2.0.0`.
+- `'~1.3.0-rc1'` is a **tilde** version range that includes pre-releases of `1.3.0` starting at `rc1`. It matches all versions `≥ 1.3.0-rc1` and `< 1.4.0`.
+- `'^1.3.0-0'` is a **caret** version range that includes _all_ pre-releases of `1.3.0`. It matches all versions `≥ 1.3.0-` and `< 2.0.0`.
+- `'~1.3.0-0'` is a **tilde** version range that includes _all_ pre-releases of `1.3.0`. It matches all versions `≥ 1.3.0-` and `< 1.4.0`.
+- `'lts'` will install the latest LTS build.
+- `'pre'` will install the latest prerelease build.
+- `'nightly'` will install the latest nightly build.
+- `'1.7-nightly'` will install the latest nightly build for the upcoming 1.7 release. This version will only be available during certain phases of the Julia release cycle.

-Internally the action uses node's semver package to resolve version ranges. Its [documentation](https://github.com/npm/node-semver#advanced-range-syntax) contains more details on the version range syntax.
+Internally the action uses node's semver package to resolve version ranges. Its [documentation](https://github.com/npm/node-semver#advanced-range-syntax) contains more details on the version range syntax. You can test what version will be selected for a given input in this JavaScript [REPL](https://repl.it/@SaschaMann/setup-julia-version-logic).

-#### WARNING: Version ranges are experimental and potentially out of date
+#### Prereleases

-Currently the list of available versions is hardcoded. You have to use the latest version of the action to be able to install the latest Julia versions. Once available we will use a list of versions provided on julialang.org.
+There are two methods of including pre-releases in version matching:
+
+1. Including the pre-release tag in the version itself, e.g. `'^1.3.0-rc1'`.
+2. Setting the input `include-all-prereleases` to `true`.
+
+These behave slightly differently.
+
+1. If the version `a.b.c` contains pre-release tag, all pre-releases of version `a.b.c` will be included in the version matching.
+For example, `^1.3.0-rc1` would match `1.3.0-rc2` but would **not** match `1.4.0-rc1` once released.
+2. If `include-preleases` is set to true, **all** pre-releases of all versions will be included in the version matching. In this case, `^1.3.0-rc1` would match `1.4.0-rc1` once released.
+
+**Example:** Without `include-all-prereleases: true`, the version `^1.3.0-rc1` would match `1.3.0-rc1`, `1.3.0-rc2`, `1.3.0`, `1.4.0` once they are released.
+With `include-all-prereleases: true`, it would match `1.3.0-rc1`, `1.3.0-rc2`, `1.3.0`, `1.4.0-rc1`, `1.4.0`.
+
+If you want to run tests against the latest tagged version, no matter what version that is, you can use
+
+```yaml
+- uses: julia-actions/setup-julia@v2
+  with:
+    version: '1'
+    include-all-prereleases: true
+```
+
+#### Recently released versions
+
+The available Julia versions are pulled from [`versions.json`](https://julialang-s3.julialang.org/bin/versions.json).

 ### Matrix Testing

+`bash` is chosen as shell to enforce consistent behaviour across operating systems. [Other shells](https://help.github.com/en/actions/reference/workflow-syntax-for-github-actions#using-a-specific-shell) are available but you may have to escape quotation marks or otherwise adjust the syntax.
+
 #### 64-bit Julia only

 ```yaml
@@ -61,14 +159,15 @@ jobs:
      matrix:
        julia-version: ['1.0', '1.2.0', '^1.3.0-rc1']
        os: [ubuntu-latest, windows-latest, macOS-latest]
-    
+
    steps:
-      - uses: actions/checkout@v1.0.0
+      - uses: actions/checkout@v4
      - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.2
+        uses: julia-actions/setup-julia@v2
        with:
          version: ${{ matrix.julia-version }}
      - run: julia -e 'println("Hello, World!")'
+        shell: bash
 ```

 #### 32-bit Julia
@@ -86,15 +185,16 @@ jobs:
        exclude:
          - os: macOS-latest
            julia-arch: x86
-    
+
    steps:
-      - uses: actions/checkout@v1.0.0
+      - uses: actions/checkout@v4
      - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.2
+        uses: julia-actions/setup-julia@v2
        with:
          version: ${{ matrix.julia-version }}
          arch: ${{ matrix.julia-arch }}
      - run: julia -e 'println("Hello, World!")'
+        shell: bash
 ```

 Alternatively, you can include specific version and OS combinations that will use 32-bit Julia:
@@ -112,43 +212,80 @@ jobs:
          - os: windows-latest
            julia-version: ['1.0.4']
            julia-arch: x86
-    
+
    steps:
-      - uses: actions/checkout@v1.0.0
+      - uses: actions/checkout@v4
      - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.2
+        uses: julia-actions/setup-julia@v2
        with:
          version: ${{ matrix.julia-version }}
      - run: julia -e 'println("Hello, World!")'
+        shell: bash
 ```

+### versioninfo
+
+By default, only the output of `julia --version` is printed as verification that Julia has been installed for stable versions of Julia.
+`InteractiveUtils.versioninfo()` is run by default for nightly builds.
+
+Starting Julia and printing the full versioninfo takes a significant amount of time (1s or ~10% of the total build time in testing), so you may not want to run it in every build, in particular on paid runners as this cost will add up quickly.
+However, `julia --version` does not provide sufficient information to know which commit a nightly binary was built from, therefore it is useful to show the full versioninfo on nightly builds regardless.
+
+You can override this behaviour by changing the input to `never` if you never want to run `InteractiveUtils.versioninfo()` or to `true` if you always want to run `InteractiveUtils.versioninfo()`, even on stable Julia builds.
+
 ## Versioning

 This action follows [GitHub's advice](https://help.github.com/en/articles/about-actions#versioning-your-action) on versioning actions, with an additional `latest` tag.

 If you don't want to deal with updating the version of the action, similiarly to how Travis CI handles it, use `latest` or major version branches. [Dependabot](https://dependabot.com/) can also be used to automatically create Pull Requests to update actions used in your workflows.

-It's unlikely, but not impossible, that there will be breaking changes post-v1.0.0 unless a new major version of Julia is introduced.
+It's unlikely, but not impossible, that there will be breaking changes post-v2.0.0 unless a new major version of Julia is introduced.

 You can specify commits, branches or tags in your workflows as follows:

 ```yaml
 steps:
-  - uses: julia-actions/setup-julia@6ae948d # commit SHA
-  - uses: julia-actions/setup-julia@master  # branch
+  - uses: julia-actions/setup-julia@f2258781c657ad9b4b88072c5eeaf9ec8c370874 # commit SHA of the tagged 2.0.0 commit
  - uses: julia-actions/setup-julia@latest  # latest version tag (may break existing workflows)
-  - uses: julia-actions/setup-julia@v1      # major version tag
-  - uses: julia-actions/setup-julia@v0.1.0  # specific version tag
+  - uses: julia-actions/setup-julia@v2      # major version tag
+  - uses: julia-actions/setup-julia@v2.0    # minor version tag
+  - uses: julia-actions/setup-julia@v2.0.0  # specific version tag
 ```

-## Future plans & ideas
+If your workflow requires access to secrets, you should always pin it to a commit SHA instead of a tag.
+This will protect you in case a bad actor gains access to the setup-julia repo.
+You can find more information in [GitHub's security hardening guide](https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/security-hardening-for-github-actions#using-third-party-actions).

-In no particular order:
+## Using Dependabot version updates to keep your GitHub Actions up to date

-* Check if a cached version of Julia is available instead of installing it everytime CI runs ([waiting on GitHub to add proper caching](https://twitter.com/natfriedman/status/1164210683979812869))
-* Add support for nightly Julia builds.
-* Add CI script that checks if tags have been updated on release.
-* Hash and signature checks.
+We highly recommend that you set up Dependabot version updates on your repo to keep your GitHub Actions up to date.

-## Licence info
-Parts of this software have been derived from the `setup-go` [action](https://github.com/actions/setup-go) and the [TypeScript Action Template](https://github.com/actions/typescript-action), both released by GitHub under the MIT licence.
+To set up Dependabot version updates, create a file named `.github/dependabot.yml` in your repo with the following contents:
+
+```yaml
+version: 2
+updates:
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "monthly"
+    open-pull-requests-limit: 99
+    labels:
+      - "dependencies"
+      - "github-actions"
+```
+
+For more details on Dependabot version updates, see the [GitHub Dependabot documentation](https://docs.github.com/en/code-security/dependabot/dependabot-version-updates).
+
+## Debug logs
+
+You can enable [Step Debug Logs](https://github.com/actions/toolkit/blob/main/docs/action-debugging.md#step-debug-logs) for more detailed logs.
+Note that when debug logs are enabled, a request will be sent to `https://httpbin.julialang.org/ip` and the runner's IP will be printed to the debug logs.
+
+## Third party information
+Parts of this software have been derived from other open source software.
+See [THIRD_PARTY_NOTICE.md](THIRD_PARTY_NOTICE.md) for details.
+
+## Contributing to this repo
+
+Please see the README in the [`devdocs/`](devdocs/) folder.
--- a/THIRD_PARTY_NOTICE.md
+++ b/THIRD_PARTY_NOTICE.md
@@ -0,0 +1,55 @@
+# Third Party Notices and Information
+
+Parts of this software have been derived from other open source software.
+Find their full licence information below.
+
+- [`setup-go` action](#setup-go-action)
+- [TypeScript Action Template](#typescript-action-template)
+
+## [`setup-go` action](https://github.com/actions/setup-go)
+
+> The MIT License (MIT)
+> 
+> Copyright (c) 2018 GitHub, Inc. and contributors
+> 
+> Permission is hereby granted, free of charge, to any person obtaining a copy
+> of this software and associated documentation files (the "Software"), to deal
+> in the Software without restriction, including without limitation the rights
+> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+> copies of the Software, and to permit persons to whom the Software is
+> furnished to do so, subject to the following conditions:
+> 
+> The above copyright notice and this permission notice shall be included in
+> all copies or substantial portions of the Software.
+> 
+> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+> THE SOFTWARE.
+
+## [TypeScript Action Template](https://github.com/actions/typescript-action)
+
+> The MIT License (MIT)
+>
+> Copyright (c) 2018 GitHub, Inc. and contributors
+> 
+> Permission is hereby granted, free of charge, to any person obtaining a copy
+> of this software and associated documentation files (the "Software"), to deal
+> in the Software without restriction, including without limitation the rights
+> to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+> copies of the Software, and to permit persons to whom the Software is
+> furnished to do so, subject to the following conditions:
+> 
+> The above copyright notice and this permission notice shall be included in
+> all copies or substantial portions of the Software.
+> 
+> THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+> IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+> FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+> AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+> LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+> OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+> THE SOFTWARE.
--- a/tests/fixtures/versions.json
+++ b/tests/fixtures/versions.json
--- a/tests/installer.test.ts
+++ b/tests/installer.test.ts
@@ -0,0 +1,132 @@
+// The testing setup has been derived from the actions/setup-go@bc6edb5 action.
+// Check README.md for licence information.
+
+import * as path from 'path'
+
+import * as io from '@actions/io'
+import * as semver from 'semver'
+
+import nock = require('nock')
+
+const testVersions = [
+    '0.1.2',
+    '0.2.0', '0.2.1',
+    '0.3.0', '0.3.1', '0.3.10', '0.3.11', '0.3.12', '0.3.2', '0.3.3', '0.3.4', '0.3.5', '0.3.6', '0.3.7', '0.3.8', '0.3.9',
+    '0.4.0', '0.4.0-rc1', '0.4.0-rc2', '0.4.0-rc3', '0.4.0-rc4', '0.4.1', '0.4.2', '0.4.3', '0.4.4', '0.4.5', '0.4.6', '0.4.7',
+    '0.5.0', '0.5.0-rc0', '0.5.0-rc1', '0.5.0-rc2', '0.5.0-rc3', '0.5.0-rc4', '0.5.1', '0.5.2',
+    '0.6.0', '0.6.0-pre.alpha', '0.6.0-pre.beta', '0.6.0-rc1', '0.6.0-rc2', '0.6.0-rc3', '0.6.1', '0.6.2', '0.6.3', '0.6.4',
+    '0.7.0', '0.7.0-alpha', '0.7.0-beta', '0.7.0-beta2', '0.7.0-rc1', '0.7.0-rc2', '0.7.0-rc3',
+    '1.0.0', '1.0.0-rc1', '1.0.1', '1.0.2', '1.0.3', '1.0.4', '1.0.5',
+    '1.1.0', '1.1.0-rc1', '1.1.0-rc2', '1.1.1',
+    '1.2.0', '1.2.0-rc1', '1.2.0-rc2', '1.2.0-rc3',
+    '1.3.0', '1.3.0-alpha', '1.3.0-rc1', '1.3.0-rc2', '1.3.0-rc3', '1.3.0-rc4', '1.3.0-rc5', '1.3.1',
+    '1.4.0', '1.4.0-rc1', '1.4.0-rc2', '1.4.1', '1.4.2',
+    '1.5.0', '1.5.0-beta1', '1.5.0-rc1', '1.5.0-rc2', '1.5.1', '1.5.2', '1.5.3', '1.5.4',
+    '1.6.0', '1.6.0-beta1', '1.6.0-rc1', '1.6.0-rc2', '1.6.0-rc3', '1.6.1', '1.6.2', '1.6.3', '1.6.4', '1.6.5', '1.6.6', '1.6.7',
+    '1.7.0', '1.7.0-beta1', '1.7.0-beta2', '1.7.0-beta3', '1.7.0-beta4', '1.7.0-rc1', '1.7.0-rc2', '1.7.0-rc3', '1.7.1', '1.7.2', '1.7.3',
+    '1.8.0', '1.8.0-beta1', '1.8.0-beta2', '1.8.0-beta3', '1.8.0-rc1', '1.8.0-rc2', '1.8.0-rc3', '1.8.0-rc4', '1.8.1', '1.8.2', '1.8.3', '1.8.4', '1.8.5',
+    '1.9.0', '1.9.0-alpha1', '1.9.0-beta1', '1.9.0-beta2', '1.9.0-beta3', '1.9.0-beta4', '1.9.0-rc1', '1.9.0-rc2', '1.9.0-rc3', '1.9.1', '1.9.2', '1.9.3', '1.9.4',
+    '1.10.0', '1.10.0-alpha1', '1.10.0-beta1', '1.10.0-beta2', '1.10.0-beta3', '1.10.0-rc1', '1.10.0-rc2', '1.10.0-rc3', '1.10.1', '1.10.2',
+    '1.11.0-alpha1', '1.11.0-alpha2', '1.11.0-beta1'
+]
+
+const toolDir = path.join(__dirname, 'runner', 'tools')
+const tempDir = path.join(__dirname, 'runner', 'temp')
+const fixtureDir = path.join(__dirname, 'fixtures')
+
+process.env['RUNNER_TOOL_CACHE'] = toolDir
+process.env['RUNNER_TEMP'] = tempDir
+
+import * as installer from '../src/installer'
+
+describe('version matching tests', () => {
+    describe('specific versions', () => {
+        it('Doesn\'t change the version when given a valid semver version', () => {
+            expect(installer.getJuliaVersion([], '1.0.5')).toEqual('1.0.5')
+            expect(installer.getJuliaVersion(['v1.0.5', 'v1.0.6'], '1.0.5')).toEqual('1.0.5')
+            expect(installer.getJuliaVersion(['v1.0.4', 'v1.0.5'], '1.0.5')).toEqual('1.0.5')
+            expect(installer.getJuliaVersion(['v1.0.4'], '1.0.5')).toEqual('1.0.5')
+            expect(installer.getJuliaVersion([], '1.3.0-alpha')).toEqual('1.3.0-alpha')
+            expect(installer.getJuliaVersion(['v1.2.0', 'v1.3.0-alpha', 'v1.3.0-rc1', 'v1.3.0'], '1.3.0-alpha')).toEqual('1.3.0-alpha')
+            expect(installer.getJuliaVersion([], '1.3.0-rc2')).toEqual('1.3.0-rc2')
+        })
+
+        it('Doesn\'t change the version when given `nightly`', () => {
+            expect(installer.getJuliaVersion([], 'nightly')).toEqual('nightly')
+            expect(installer.getJuliaVersion(testVersions, 'nightly')).toEqual('nightly')
+        })
+
+        it('LTS', () => {
+            // Update test when LTS is updated
+            expect(installer.getJuliaVersion(testVersions, 'lts')).toEqual(installer.getJuliaVersion(testVersions, '1.6'))
+            expect(installer.getJuliaVersion(testVersions, 'lts')).toEqual('1.6.7')
+        })
+
+        it('pre', () => {
+            expect(installer.getJuliaVersion(testVersions, 'pre')).toEqual('1.11.0-beta1')
+        })
+    })
+
+    describe('version ranges', () => {
+        it('Chooses the highest available version that matches the input', () => {
+            expect(installer.getJuliaVersion(testVersions, '1')).toEqual('1.10.2')
+            expect(installer.getJuliaVersion(testVersions, '1.0')).toEqual('1.0.5')
+            expect(installer.getJuliaVersion(testVersions, '^1.3.0-rc1')).toEqual('1.10.2')
+            expect(installer.getJuliaVersion(testVersions, '^1.2.0-rc1')).toEqual('1.10.2')
+            expect(installer.getJuliaVersion(testVersions, '^1.10.0-rc1')).toEqual('1.10.2')
+        })
+    })
+
+    describe('include-prereleases', () => {
+        it('Chooses the highest available version that matches the input including prereleases', () => {
+            expect(installer.getJuliaVersion(testVersions, '^1.2.0-0', true)).toEqual('1.11.0-beta1')
+            expect(installer.getJuliaVersion(testVersions, '1', true)).toEqual('1.11.0-beta1')
+            expect(installer.getJuliaVersion(testVersions, '^1.2.0-0', false)).toEqual('1.10.2')
+        })
+    })
+
+    describe('node-semver behaviour', () => {
+        describe('Windows installer change', () => {
+            it('Correctly understands >1.4.0', () => {
+                expect(semver.gtr('1.4.0-rc1', '1.3', {includePrerelease: true})).toBeTruthy()
+                expect(semver.gtr('1.4.0-DEV', '1.3', {includePrerelease: true})).toBeTruthy()
+                expect(semver.gtr('1.3.1', '1.3', {includePrerelease: true})).toBeFalsy()
+                expect(semver.gtr('1.3.2-rc1', '1.3', {includePrerelease: true})).toBeFalsy()
+            })
+        })
+    })
+})
+
+describe('installer tests', () => {
+    beforeAll(async () => {
+        await io.rmRF(toolDir)
+        await io.rmRF(tempDir)
+    }, 100000)
+
+    afterAll(async () => {
+        try {
+            await io.rmRF(toolDir)
+            await io.rmRF(tempDir)
+        } catch {
+            console.log('Failed to remove test directories')
+        }
+    }, 100000)
+
+    describe('versions.json parsing', () => {
+        // Instead of downloading versions.json, use fixtures/versions.json
+        beforeEach(() => {
+            nock('https://julialang-s3.julialang.org').persist()
+                .get('/bin/versions.json')
+                .replyWithFile(200, path.join(fixtureDir, 'versions.json'))
+        })
+
+        afterEach(() => {
+            nock.cleanAll()
+            nock.enableNetConnect()
+        })
+
+        it('Extracts the list of available versions', async () => {
+            expect(await (await installer.getJuliaVersions(await installer.getJuliaVersionInfo())).sort()).toEqual(testVersions.sort())
+        })
+    })
+})
--- a/tests/main.test.ts
+++ b/tests/main.test.ts
@@ -1,27 +0,0 @@
-import * as installer from '../src/installer'
-
-const testVersions = ['v1.3.0-rc4', 'v1.3.0-rc3', 'v1.3.0-rc2', 'v1.0.5', 'v1.2.0', 'v1.3.0-rc1', 'v1.2.0-rc3', 'v1.3.0-alpha', 'v1.2.0-rc2', 'v1.2.0-rc1', 'v1.1.1', 'v1.0.4', 'v1.1.0', 'v1.1.0-rc2', 'v1.1.0-rc1', 'v1.0.3', 'v1.0.2', 'v1.0.1', 'v1.0.0']
-
-describe('installer tests', () => {
-    describe('version matching', () => {
-        describe('specific versions', () => {
-            it('Doesn\'t change the version when given a valid semver version', async () => {
-                expect(await installer.getJuliaVersion([], '1.0.5')).toEqual('1.0.5')
-                expect(await installer.getJuliaVersion(['v1.0.5', 'v1.0.6'], '1.0.5')).toEqual('1.0.5')
-                expect(await installer.getJuliaVersion(['v1.0.4', 'v1.0.5'], '1.0.5')).toEqual('1.0.5')
-                expect(await installer.getJuliaVersion(['v1.0.4'], '1.0.5')).toEqual('1.0.5')
-                expect(await installer.getJuliaVersion([], '1.3.0-alpha')).toEqual('1.3.0-alpha')
-                expect(await installer.getJuliaVersion(['v1.2.0', 'v1.3.0-alpha', 'v1.3.0-rc1', 'v1.3.0'], '1.3.0-alpha')).toEqual('1.3.0-alpha')
-                expect(await installer.getJuliaVersion([], '1.3.0-rc2')).toEqual('1.3.0-rc2')
-            })
-        })
-        describe('version ranges', () => {
-            it('Chooses the highest available version that matches the input', async () => {
-                expect(await installer.getJuliaVersion(testVersions, '1')).toEqual('1.2.0')
-                expect(await installer.getJuliaVersion(testVersions, '1.0')).toEqual('1.0.5')
-                expect(await installer.getJuliaVersion(testVersions, '^1.3.0-rc1')).toEqual('1.3.0-rc4')
-                expect(await installer.getJuliaVersion(testVersions, '^1.2.0-rc1')).toEqual('1.2.0')
-            })
-        })
-    })
-})
--- a/action.yml
+++ b/action.yml
@@ -5,13 +5,26 @@ inputs:
  version:
    description: 'The Julia version to download (if necessary) and use. Example: 1.0.4'
    default: '1'
-  arch:
-    description: 'Architecture of the Julia binaries. Defaults to x64.'
+  include-all-prereleases:
+    description: 'Include prereleases when matching the Julia version to available versions.'
    required: false
-    default: 'x64'
+    default: 'false'
+  arch:
+    description: 'Architecture of the Julia binaries. Defaults to the architecture of the runner executing the job.'
+    required: false
+    default: '${{ runner.arch }}'
+  show-versioninfo:
+    description: 'Display InteractiveUtils.versioninfo() after installing'
+    required: false
+    default: 'false'
+outputs:
+  julia-version:
+    description: 'The installed Julia version. May vary from the version input if a version range was given as input.'
+  julia-bindir:
+    description: 'Path to the directory containing the Julia executable. Equivalent to JULIA_BINDIR: https://docs.julialang.org/en/v1/manual/environment-variables/#JULIA_BINDIR'
 runs:
-  using: 'node12'
-  main: 'lib/setup-julia.js'
+  using: 'node20'
+  main: 'dist/index.js'
 branding:
  icon: 'download'
  color: 'green'
--- a/1
+++ b/1
--- a/bin/build-release
+++ b/bin/build-release
@@ -1,13 +0,0 @@
-#!/bin/sh
-
-git checkout -b releases/"$1"
-
-npm install
-npm run build
-npm test
-npm prune --production
-
-sed -i 's/node_modules/!node_modules/g' .gitignore
-git add node_modules
-git commit -a -m "Add production dependencies & build"
-git tag "$1"
--- a/devdocs/README.md
+++ b/devdocs/README.md
@@ -0,0 +1,7 @@
+# Devdocs for the `setup-julia` repo
+
+If you want to make a pull request to this repo, please read the following:
+1. [Local development](local_setup.md)
+
+If you have commit access to this repo, you may be interested in the following:
+1. [Making a new release of this action](making_a_new_release.md)
--- a/devdocs/local_setup.md
+++ b/devdocs/local_setup.md
@@ -0,0 +1,47 @@
+# Local development
+
+## 1. Clone the repo
+
+```bash
+git clone git@github.com:julia-actions/setup-julia.git
+cd setup-julia
+```
+
+## 2. Install NodeJS
+
+### Unix, using `asdf` (recommended, but not required)
+
+First, make sure that you have installed [`asdf`](https://asdf-vm.com/) on your local machine.
+
+Then, `cd` to your clone of the repo and run the following commands:
+
+```bash
+asdf plugin add nodejs
+asdf install
+```
+
+This will use `asdf` to install the correct version of NodeJS.
+
+### Unix, but not using `asdf`
+
+Instead of using `asdf`, you can instead choose to install NodeJS manually.
+
+First, check the `.tool-versions` file in this repo, and see what version of NodeJS you need. Then, install that same version of NodejS on your local machine.
+
+### Windows
+
+`asdf` does not (currently) support Windows. So on Windows, you have to install NodeJS manually.
+
+First, check the `.tool-versions` file in this repo, and see what version of NodeJS you need. Then, install that same version of NodejS on your local machine.
+
+## 3. Working locally
+
+First, `cd` to your clone of the repo. Now you can run the following commands:
+
+```bash
+npm ci
+
+npm run build
+```
+
+When you are ready, you can commit your changes and push them to your PR.
--- a/devdocs/making_a_new_release.md
+++ b/devdocs/making_a_new_release.md
@@ -0,0 +1,128 @@
+# Making a new release of this action (requires commit access)
+
+If you have commit access to this repo, you can make a new release.
+
+Here are the instructions.
+
+## Step 1: Clone a fresh copy of the repo
+
+We intentionally work in a brand-new copy of the repo.
+
+```bash
+git clone git@github.com:julia-actions/setup-julia.git
+cd setup-julia
+git checkout master
+git submodule init
+git submodule update
+```
+
+## Step 2: Make sure you have the right version of NodeJS
+
+If you use [`asdf`](https://asdf-vm.com/), this is as simple as:
+
+```bash
+asdf plugin add nodejs
+asdf install
+```
+
+If you don't use `asdf`, then you need to:
+1. Open the `./tool-versions` file in the root of the repo.
+2. Make note of the NodeJS version listed in the `.tool-versions` file.
+3. Install that same version of NodeJS on your machine.
+4. Make sure that you are currently using that version of NodeJS (i.e. it is at the front of your PATH).
+
+## Step 3: Edit the `version` field in `package.json`
+
+```bash
+vim package.json
+
+# Edit the `version` number (should be line 2)
+# Save your changes in Vim. Then exit Vim.
+
+# For the remaining of this guide, let MAJOR.MINOR.PATCH refer
+# to the new version number that you set.
+
+git add package.json
+
+# No need to commit yet.
+# The release script will run `git commit`.
+```
+
+## Step 4: Remove the `dist/` line from the `.gitignore` file
+
+```bash
+vim .gitignore
+# Delete the line that says `dist/` (it should be line 3)
+# Save your changes in Vim. Then exit Vim.
+
+git add .gitignore
+
+# No need to commit yet.
+# The release script will run `git commit`.
+```
+
+## Step 5: Make sure you have the necessary dependencies
+
+The `build-release.sh` script requires the following dependencies:
+
+1. Bash
+2. `curl`
+3. `git`
+4. `jq`
+5. `sed`
+
+## Step 6: Run the `build-release.sh` script
+
+```bash
+ls -l bin/build-release.sh
+chmod +x bin/build-release.sh
+ls -l bin/build-release.sh
+
+./bin/build-release.sh julia-actions/setup-julia
+```
+
+Wait a minute or two. The script will build everything and will create a new release branch named `releases/vMAJOR.MINOR.PATCH`.
+
+## Step 7: Push ONLY the `releases/vMAJOR.MINOR.PATCH` branch
+
+Only push the `releases/` branch. Do NOT push any tags yet.
+
+```bash
+git push origin releases/vMAJOR.MINOR.PATCH
+```
+
+Now you need to go to https://github.com/julia-actions/setup-julia/tree/releases/vMAJOR.MINOR.PATCH and wait for CI to finish running.
+
+Do NOT proceed to the next step until CI is all green on the `releases/vMAJOR.MINOR.PATCH` branch.
+
+## Step 8: Push the tags (only after CI is all green)
+
+Once CI is all green on the `releases/vMAJOR.MINOR.PATCH` branch, you can push the tags.
+
+You need to force-push.
+
+```bash
+git push --tags --force
+```
+
+## Step 9: Use the GitHub web UI to create a new GitHub Release
+
+Go to https://github.com/julia-actions/setup-julia/releases  and create a new release for the now-existant `vMAJOR.MINOR.PATCH` tag using the GitHub web interface.
+
+## Step 10: Clean up your local repo
+
+```bash
+git submodule deinit --force .
+git submodule update --init
+git fetch --all --prune
+git checkout master
+git reset --hard origin/master
+```
+
+## Step 11: Delete your local repo
+
+```bash
+cd ..
+ls setup-julia
+rm -rf setup-julia
+```
--- a/devdocs/misc/misc_notes_for_committers.md
+++ b/devdocs/misc/misc_notes_for_committers.md
@@ -1,4 +1,4 @@
-# Contributors
+# Misc notes for contributors

 ### Checkin

@@ -19,4 +19,4 @@ git commit -m "Informative commit message"  # Commit. This will run Husky
 ```

 During the commit step, Husky will take care of formatting all files with [Prettier](https://github.com/prettier/prettier) as well as pruning out devDependencies using `npm prune --production`.
-It will also make sure these changes are appropriately included in your commit (no further work is needed)
+It will also make sure these changes are appropriately included in your commit (no further work is needed)
--- a/dist/index.js
+++ b/dist/index.js
--- a/docs/release-checklist.md
+++ b/docs/release-checklist.md
@@ -1,16 +0,0 @@
-# Release checklist
-
-Version: `1.b.c`
-
- [ ] Create release branch `releases/v1.b.c`
-  - [ ] Unignore `node_modules/` by adding `!` in front in `.gitignore`
-  - [ ] Delete `node_modules/`
-  - [ ] Install production dependencies: `npm install --production`
-  - [ ] Add `node_modules/`: `git add node_modules`
-  - [ ] Commit & push action: `git commit -a -m "Publish v1.b.c."`, then `git push`
- [ ] Test the action with an example package
- [ ] Create tags
-  - [ ] `v1.b.c` pointing at the last commit in `releases/v1.b.c`
-  - [ ] `latest` pointing at the latest version of the highest major version
-  - [ ] `v1` pointing at the latest `1.x.x` version
- [ ] Push tags
--- a/lib/installer.js
+++ b/lib/installer.js
@@ -1,115 +1,361 @@
 "use strict";
-var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
-    return new (P || (P = Promise))(function (resolve, reject) {
-        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
-        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
-        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments || [])).next());
-    });
-};
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
 var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
    return result;
 };
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
 Object.defineProperty(exports, "__esModule", { value: true });
+exports.showVersionInfo = exports.installJulia = exports.getDownloadURL = exports.getFileInfo = exports.getJuliaVersion = exports.getJuliaVersions = exports.getJuliaVersionInfo = void 0;
 const core = __importStar(require("@actions/core"));
 const exec = __importStar(require("@actions/exec"));
 const tc = __importStar(require("@actions/tool-cache"));
+const crypto = __importStar(require("crypto"));
+const fs = __importStar(require("fs"));
 const os = __importStar(require("os"));
 const path = __importStar(require("path"));
+const retry = require("async-retry");
 const semver = __importStar(require("semver"));
+const LTS_VERSION = '1.6';
+const MAJOR_VERSION = '1'; // Could be deduced from versions.json
+// Translations between actions input and Julia arch names
+const osMap = {
+    'win32': 'winnt',
+    'darwin': 'mac',
+    'linux': 'linux'
+};
+const archMap = {
+    'x86': 'i686',
+    'x64': 'x86_64',
+    'aarch64': 'aarch64'
+};
 // Store information about the environment
 const osPlat = os.platform(); // possible values: win32 (Windows), linux (Linux), darwin (macOS)
 core.debug(`platform: ${osPlat}`);
-// This is temporary until we have a better way of fetching releases (see #1, #4 for details)
-exports.juliaVersions = ['v1.3.0-rc5', 'v1.3.0-rc4', 'v1.3.0-rc3', 'v1.3.0-rc2', 'v1.0.5', 'v1.2.0', 'v1.3.0-rc1', 'v1.2.0-rc3', 'v1.3.0-alpha', 'v1.2.0-rc2', 'v1.2.0-rc1', 'v1.1.1', 'v1.0.4', 'v1.1.0', 'v1.1.0-rc2', 'v1.1.0-rc1', 'v1.0.3', 'v1.0.2', 'v1.0.1', 'v1.0.0', 'v0.7.0', 'v1.0.0-rc1', 'v0.7.0-rc3', 'v0.7.0-rc2', 'v0.7.0-rc1', 'v0.7.0-beta2', 'v0.6.4', 'v0.7.0-beta', 'v0.7.0-alpha', 'v0.6.3', 'v0.6.2', 'v0.6.1', 'v0.6.0', 'v0.6.0-rc3', 'v0.6.0-rc2', 'v0.5.2', 'v0.6.0-rc1', 'v0.6.0-pre.beta', 'v0.5.1', 'v0.6.0-pre.alpha', 'v0.5.0', 'v0.4.7', 'v0.5.0-rc4', 'v0.5.0-rc3', 'v0.5.0-rc2', 'v0.5.0-rc1', 'v0.5.0-rc0', 'v0.4.6', 'v0.4.5', 'v0.4.4', 'v0.4.3', 'v0.4.2', 'v0.4.1', 'v0.3.12', 'v0.4.0', 'v0.4.0-rc4', 'v0.4.0-rc3', 'v0.4.0-rc2', 'v0.4.0-rc1', 'v0.3.11', 'v0.3.10', 'v0.3.9', 'v0.3.8', 'v0.3.7', 'v0.3.6', 'v0.3.5', 'v0.3.4', 'v0.3.3', 'v0.3.2', 'v0.3.1', 'v0.3.0', 'v0.3.0-rc4', 'v0.3.0-rc3', 'v0.3.0-rc2', 'v0.3.0-rc1', 'v0.2.0-rc1', 'v0.2.0-rc3', 'v0.2.0-rc4', 'v0.2.0', 'v0.2.0-rc2'];
-function getJuliaVersion(availableReleases, versionInput) {
+/**
+ * @returns The SHA256 checksum of a given file.
+ */
+function calculateChecksum(file) {
    return __awaiter(this, void 0, void 0, function* () {
-        if (semver.valid(versionInput) == versionInput) {
-            // versionInput is a valid version, use it directly
-            return versionInput;
-        }
-        // Use the highest available version that matches versionInput
-        let version = semver.maxSatisfying(availableReleases, versionInput);
-        if (version == null) {
-            throw `Could not find a Julia version that matches ${versionInput}`;
-        }
-        // GitHub tags start with v, remove it
-        version = version.replace(/^v/, '');
-        return version;
+        const hash = crypto.createHash('sha256');
+        const input = fs.createReadStream(file);
+        return new Promise((resolve, reject) => {
+            input.on('data', (chunk) => {
+                hash.update(chunk);
+            });
+            input.on('end', () => {
+                const digest = hash.digest('hex');
+                digest ? resolve(digest) : reject(new Error(`Could not calculate checksum of file ${file}: digest was empty.`));
+            });
+        });
    });
 }
+/**
+ * @returns The content of the downloaded versions.json file as object.
+ */
+function getJuliaVersionInfo() {
+    return __awaiter(this, void 0, void 0, function* () {
+        // Occasionally the connection is reset for unknown reasons
+        // In those cases, retry the download
+        const versionsFile = yield retry((bail) => __awaiter(this, void 0, void 0, function* () {
+            return yield tc.downloadTool('https://julialang-s3.julialang.org/bin/versions.json');
+        }), {
+            retries: 5,
+            onRetry: (err) => {
+                core.info(`Download of versions.json failed, trying again. Error: ${err}`);
+            }
+        });
+        return JSON.parse(fs.readFileSync(versionsFile).toString());
+    });
+}
+exports.getJuliaVersionInfo = getJuliaVersionInfo;
+/**
+ * @returns An array of all Julia versions available for download
+ */
+function getJuliaVersions(versionInfo) {
+    return __awaiter(this, void 0, void 0, function* () {
+        let versions = [];
+        for (let version in versionInfo) {
+            versions.push(version);
+        }
+        return versions;
+    });
+}
+exports.getJuliaVersions = getJuliaVersions;
+function getJuliaVersion(availableReleases, versionInput, includePrerelease = false) {
+    if (semver.valid(versionInput) == versionInput || versionInput.endsWith('nightly')) {
+        // versionInput is a valid version or a nightly version, use it directly
+        return versionInput;
+    }
+    if (versionInput == 'lts') {
+        return getJuliaVersion(availableReleases, LTS_VERSION, false);
+    }
+    if (versionInput == 'pre') {
+        return getJuliaVersion(availableReleases, MAJOR_VERSION, true);
+    }
+    // Use the highest available version that matches versionInput
+    let version = semver.maxSatisfying(availableReleases, versionInput, { includePrerelease });
+    if (version == null) {
+        throw new Error(`Could not find a Julia version that matches ${versionInput}`);
+    }
+    // GitHub tags start with v, remove it
+    version = version.replace(/^v/, '');
+    return version;
+}
 exports.getJuliaVersion = getJuliaVersion;
-function getMajorMinorVersion(version) {
-    return version.split('.').slice(0, 2).join('.');
-}
-function getDownloadURL(version, arch) {
-    const baseURL = 'https://julialang-s3.julialang.org/bin';
-    let platform;
-    const versionDir = getMajorMinorVersion(version);
-    if (osPlat === 'win32') { // Windows
-        platform = 'winnt';
+function getDesiredFileExts() {
+    let fileExt1;
+    let hasFileExt2;
+    let fileExt2;
+    if (osPlat == 'win32') {
+        fileExt1 = 'tar.gz';
+        hasFileExt2 = true;
+        fileExt2 = 'exe';
    }
-    else if (osPlat === 'darwin') { // macOS
-        if (arch == 'x86') {
-            throw '32-bit Julia is not available on macOS';
-        }
-        platform = 'mac';
+    else if (osPlat == 'darwin') {
+        fileExt1 = 'tar.gz';
+        hasFileExt2 = true;
+        fileExt2 = 'dmg';
    }
-    else if (osPlat === 'linux') { // Linux
-        platform = 'linux';
+    else if (osPlat === 'linux') {
+        fileExt1 = 'tar.gz';
+        hasFileExt2 = false;
+        fileExt2 = '';
    }
    else {
-        throw `Platform ${osPlat} is not supported`;
+        throw new Error(`Platform ${osPlat} is not supported`);
    }
-    return `${baseURL}/${platform}/${arch}/${versionDir}/${getFileName(version, arch)}`;
+    return [fileExt1, hasFileExt2, fileExt2];
 }
-function getFileName(version, arch) {
-    let versionExt, ext;
-    if (osPlat === 'win32') { // Windows
-        versionExt = arch == 'x64' ? '-win64' : '-win32';
-        ext = 'exe';
-    }
-    else if (osPlat === 'darwin') { // macOS
+function getNightlyFileName(arch) {
+    let versionExt;
+    let fileExt1;
+    [fileExt1, ,] = getDesiredFileExts();
+    if (osPlat == 'win32') {
        if (arch == 'x86') {
-            throw '32-bit Julia is not available on macOS';
+            versionExt = '-win32';
+        }
+        else if (arch == 'aarch64') {
+            throw new Error('Aarch64 Julia is not available on Windows');
+        }
+        else if (arch == 'x64') {
+            versionExt = '-win64';
+        }
+        else {
+            throw new Error(`Architecture ${arch} is not supported on Windows`);
        }
-        versionExt = '-mac64';
-        ext = 'dmg';
    }
-    else if (osPlat === 'linux') { // Linux
-        versionExt = arch == 'x64' ? '-linux-x86_64' : '-linux-i686';
-        ext = 'tar.gz';
+    else if (osPlat == 'darwin') {
+        if (arch == 'x86') {
+            throw new Error('32-bit (x86) Julia is not available on macOS');
+        }
+        else if (arch == 'aarch64') {
+            versionExt = '-macaarch64';
+        }
+        else if (arch == 'x64') {
+            versionExt = '-mac64';
+        }
+        else {
+            throw new Error(`Architecture ${arch} is not supported on macOS`);
+        }
+    }
+    else if (osPlat === 'linux') {
+        if (arch == 'x86') {
+            versionExt = '-linux32';
+        }
+        else if (arch == 'aarch64') {
+            versionExt = '-linux-aarch64';
+        }
+        else if (arch == 'x64') {
+            versionExt = '-linux64';
+        }
+        else {
+            throw new Error(`Architecture ${arch} is not supported on Linux`);
+        }
    }
    else {
-        throw `Platform ${osPlat} is not supported`;
+        throw new Error(`Platform ${osPlat} is not supported`);
    }
-    return `julia-${version}${versionExt}.${ext}`;
+    return `julia-latest${versionExt}.${fileExt1}`;
 }
-function installJulia(version, arch) {
+function getFileInfo(versionInfo, version, arch) {
+    const err = `Could not find ${archMap[arch]}/${version} binaries`;
+    let fileExt1;
+    let hasFileExt2;
+    let fileExt2;
+    [fileExt1, hasFileExt2, fileExt2] = getDesiredFileExts();
+    if (version.endsWith('nightly')) {
+        return null;
+    }
+    if (!versionInfo[version]) {
+        throw err;
+    }
+    for (let file of versionInfo[version].files) {
+        if (file.os == osMap[osPlat] && file.arch == archMap[arch]) {
+            if (file.extension == fileExt1) {
+                return file;
+            }
+        }
+    }
+    if (hasFileExt2) {
+        core.debug(`Could not find ${fileExt1}; trying to find ${fileExt2} instead`);
+        for (let file of versionInfo[version].files) {
+            if (file.os == osMap[osPlat] && file.arch == archMap[arch]) {
+                if (file.extension == fileExt2) {
+                    return file;
+                }
+            }
+        }
+    }
+    throw err;
+}
+exports.getFileInfo = getFileInfo;
+function getDownloadURL(fileInfo, version, arch) {
+    const baseURL = `https://julialangnightlies-s3.julialang.org/bin/${osMap[osPlat]}/${arch}`;
+    // release branch nightlies, e.g. 1.6-nightlies should return .../bin/linux/x64/1.6/julia-latest-linux64.tar.gz
+    const majorMinorMatches = /^(\d*.\d*)-nightly/.exec(version);
+    if (majorMinorMatches) {
+        return `${baseURL}/${majorMinorMatches[1]}/${getNightlyFileName(arch)}`;
+    }
+    // nightlies
+    if (version == 'nightly') {
+        return `${baseURL}/${getNightlyFileName(arch)}`;
+    }
+    // Verify that fileInfo.url points at the official Julia download servers
+    if (!fileInfo.url.startsWith('https://julialang-s3.julialang.org/')) {
+        throw new Error(`versions.json points at a download location outside of Julia's download server: ${fileInfo.url}. Aborting for security reasons.`);
+    }
+    return fileInfo.url;
+}
+exports.getDownloadURL = getDownloadURL;
+function installJulia(dest, versionInfo, version, arch) {
    return __awaiter(this, void 0, void 0, function* () {
        // Download Julia
-        const downloadURL = getDownloadURL(version, arch);
+        const fileInfo = getFileInfo(versionInfo, version, arch);
+        const downloadURL = getDownloadURL(fileInfo, version, arch);
        core.debug(`downloading Julia from ${downloadURL}`);
-        const juliaDownloadPath = yield tc.downloadTool(downloadURL);
+        // Occasionally the connection is reset for unknown reasons
+        // In those cases, retry the download
+        const juliaDownloadPath = yield retry((bail) => __awaiter(this, void 0, void 0, function* () {
+            return yield tc.downloadTool(downloadURL);
+        }), {
+            retries: 5,
+            onRetry: (err) => {
+                core.info(`Download of ${downloadURL} failed, trying again. Error: ${err}`);
+            }
+        });
+        // Verify checksum
+        if (!version.endsWith('nightly')) {
+            const checkSum = yield calculateChecksum(juliaDownloadPath);
+            if (fileInfo.sha256 != checkSum) {
+                throw new Error(`Checksum of downloaded file does not match the expected checksum from versions.json.\nExpected: ${fileInfo.sha256}\nGot: ${checkSum}`);
+            }
+            core.debug(`Checksum of downloaded file matches expected checksum: ${checkSum}`);
+        }
+        else {
+            core.debug('Skipping checksum check for nightly binaries.');
+        }
        // Install it
        switch (osPlat) {
            case 'linux':
-                const juliaExtractedFolder = yield tc.extractTar(juliaDownloadPath);
-                return path.join(juliaExtractedFolder, `julia-${version}`);
+                // tc.extractTar doesn't support stripping components, so we have to call tar manually
+                yield exec.exec('tar', ['xf', juliaDownloadPath, '--strip-components=1', '-C', dest]);
+                return dest;
            case 'win32':
-                const juliaInstallationPath = path.join('C:', 'Julia');
-                yield exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/S /D=${juliaInstallationPath}" -NoNewWindow -Wait`]);
-                return juliaInstallationPath;
+                if (fileInfo !== null && fileInfo.extension == 'exe') {
+                    if (version.endsWith('nightly') || semver.gtr(version, '1.3', { includePrerelease: true })) {
+                        // The installer changed in 1.4: https://github.com/JuliaLang/julia/blob/ef0c9108b12f3ae177c51037934351ffa703b0b5/NEWS.md#build-system-changes
+                        yield exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/SILENT /dir=${path.join(process.cwd(), dest)}" -NoNewWindow -Wait`]);
+                    }
+                    else {
+                        yield exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/S /D=${path.join(process.cwd(), dest)}" -NoNewWindow -Wait`]);
+                    }
+                }
+                else {
+                    // This is the more common path. Using .tar.gz is much faster
+                    // don't use the Git bash provided tar. Issue #205
+                    // https://github.com/julia-actions/setup-julia/issues/205
+                    yield exec.exec('powershell', ['-Command', `& "$env:WINDIR/System32/tar" xf ${juliaDownloadPath} --strip-components=1 -C ${dest}`]);
+                }
+                return dest;
            case 'darwin':
-                yield exec.exec('hdiutil', ['attach', juliaDownloadPath]);
-                return `/Volumes/Julia-${version}/Julia-${getMajorMinorVersion(version)}.app/Contents/Resources/julia`;
+                if (fileInfo !== null && fileInfo.extension == 'dmg') {
+                    core.debug(`Support for .dmg files is deprecated and may be removed in a future release`);
+                    yield exec.exec('hdiutil', ['attach', juliaDownloadPath]);
+                    yield exec.exec('/bin/bash', ['-c', `cp -a /Volumes/Julia-*/Julia-*.app/Contents/Resources/julia ${dest}`]);
+                    return path.join(dest, 'julia');
+                }
+                else {
+                    // tc.extractTar doesn't support stripping components, so we have to call tar manually
+                    yield exec.exec('tar', ['xf', juliaDownloadPath, '--strip-components=1', '-C', dest]);
+                    return dest;
+                }
            default:
-                throw `Platform ${osPlat} is not supported`;
+                throw new Error(`Platform ${osPlat} is not supported`);
        }
    });
 }
 exports.installJulia = installJulia;
+/**
+ * Test if Julia has been installed and print the version.
+ *
+ * true => always show versioninfo
+ * false => only show on nightlies
+ * never => never show it anywhere
+ *
+ * @param showVersionInfoInput
+ */
+function showVersionInfo(showVersionInfoInput, version) {
+    return __awaiter(this, void 0, void 0, function* () {
+        // --compile=min -O0 reduces the time from ~1.8-1.9s to ~0.8-0.9s
+        let exitCode;
+        switch (showVersionInfoInput) {
+            case 'true':
+                exitCode = yield exec.exec('julia', ['--compile=min', '-O0', '-e', 'using InteractiveUtils; versioninfo()']);
+                break;
+            case 'false':
+                if (version.endsWith('nightly')) {
+                    exitCode = yield exec.exec('julia', ['--compile=min', '-O0', '-e', 'using InteractiveUtils; versioninfo()']);
+                }
+                else {
+                    exitCode = yield exec.exec('julia', ['--version']);
+                }
+                break;
+            case 'never':
+                exitCode = yield exec.exec('julia', ['--version']);
+                break;
+            default:
+                throw new Error(`${showVersionInfoInput} is not a valid value for show-versioninfo. Supported values: true | false | never`);
+        }
+        if (exitCode !== 0) {
+            throw new Error(`Julia could not be installed properly. Exit code: ${exitCode}`);
+        }
+    });
+}
+exports.showVersionInfo = showVersionInfo;
--- a/lib/setup-julia.js
+++ b/lib/setup-julia.js
@@ -1,50 +1,119 @@
 "use strict";
-var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
-    return new (P || (P = Promise))(function (resolve, reject) {
-        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
-        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
-        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
-        step((generator = generator.apply(thisArg, _arguments || [])).next());
-    });
-};
+var __createBinding = (this && this.__createBinding) || (Object.create ? (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    var desc = Object.getOwnPropertyDescriptor(m, k);
+    if (!desc || ("get" in desc ? !m.__esModule : desc.writable || desc.configurable)) {
+      desc = { enumerable: true, get: function() { return m[k]; } };
+    }
+    Object.defineProperty(o, k2, desc);
+}) : (function(o, m, k, k2) {
+    if (k2 === undefined) k2 = k;
+    o[k2] = m[k];
+}));
+var __setModuleDefault = (this && this.__setModuleDefault) || (Object.create ? (function(o, v) {
+    Object.defineProperty(o, "default", { enumerable: true, value: v });
+}) : function(o, v) {
+    o["default"] = v;
+});
 var __importStar = (this && this.__importStar) || function (mod) {
    if (mod && mod.__esModule) return mod;
    var result = {};
-    if (mod != null) for (var k in mod) if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
-    result["default"] = mod;
+    if (mod != null) for (var k in mod) if (k !== "default" && Object.prototype.hasOwnProperty.call(mod, k)) __createBinding(result, mod, k);
+    __setModuleDefault(result, mod);
    return result;
 };
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments || [])).next());
+    });
+};
 Object.defineProperty(exports, "__esModule", { value: true });
 const core = __importStar(require("@actions/core"));
-const exec = __importStar(require("@actions/exec"));
 const tc = __importStar(require("@actions/tool-cache"));
+const fs = __importStar(require("fs"));
+const https = __importStar(require("https"));
 const path = __importStar(require("path"));
 const installer = __importStar(require("./installer"));
+const archSynonyms = {
+    'x86': 'x86',
+    'X86': 'x86',
+    'x64': 'x64',
+    'X64': 'x64',
+    'aarch64': 'aarch64',
+    'ARM64': 'aarch64',
+    'arm64': 'aarch64'
+};
 function run() {
    return __awaiter(this, void 0, void 0, function* () {
        try {
+            // Debugging info
+            if (core.isDebug()) {
+                // Log Runner IP Address
+                https.get('https://httpbin.julialang.org/ip', resp => {
+                    let data = '';
+                    resp.on('data', chunk => {
+                        data += chunk;
+                    });
+                    resp.on('end', () => {
+                        core.debug(`Runner IP address: ${JSON.parse(data).origin}`);
+                    });
+                }).on('error', err => {
+                    core.debug(`ERROR: Could not retrieve runner IP: ${err}`);
+                });
+            }
+            // Inputs
            const versionInput = core.getInput('version');
-            const arch = core.getInput('arch');
-            const availableReleases = installer.juliaVersions;
-            const version = yield installer.getJuliaVersion(availableReleases, versionInput);
+            const includePrereleases = core.getInput('include-all-prereleases') == 'true';
+            const originalArchInput = core.getInput('arch');
+            // It can easily happen that, for example, a workflow file contains an input `version: ${{ matrix.julia-version }}`
+            // while the strategy matrix only contains a key `${{ matrix.version }}`.
+            // In that case, we want the action to fail, rather than trying to download julia from an URL that's missing parts and 404ing.
+            // We _could_ fall back to the default but that means that builds silently do things differently than they're meant to, which
+            // is worse than failing the build.
+            if (!versionInput) {
+                throw new Error('Version input must not be null');
+            }
+            if (!originalArchInput) {
+                throw new Error(`Arch input must not be null`);
+            }
+            const arch = archSynonyms[originalArchInput];
+            const versionInfo = yield installer.getJuliaVersionInfo();
+            const availableReleases = yield installer.getJuliaVersions(versionInfo);
+            const version = installer.getJuliaVersion(availableReleases, versionInput, includePrereleases);
            core.debug(`selected Julia version: ${arch}/${version}`);
+            core.setOutput('julia-version', version);
            // Search in cache
            let juliaPath;
            juliaPath = tc.find('julia', version, arch);
            if (!juliaPath) {
-                core.debug(`could not find Julia ${version} in cache`);
-                const juliaInstallationPath = yield installer.installJulia(version, arch);
-                // Add it to cache
-                juliaPath = yield tc.cacheDir(juliaInstallationPath, 'julia', version, arch);
+                core.debug(`could not find Julia ${arch}/${version} in cache`);
+                // https://github.com/julia-actions/setup-julia/pull/196
+                // we want julia to be installed with unmodified file mtimes
+                // but `tc.cacheDir` uses `cp` internally which destroys mtime
+                // and `tc` provides no API to get the tool directory alone
+                // so hack it by installing a empty directory then use the path it returns
+                // and extract the archives directly to that location
+                const emptyDir = fs.mkdtempSync('empty');
+                juliaPath = yield tc.cacheDir(emptyDir, 'julia', version, arch);
+                yield installer.installJulia(juliaPath, versionInfo, version, arch);
                core.debug(`added Julia to cache: ${juliaPath}`);
+                // Remove empty dir
+                fs.rmdirSync(emptyDir);
            }
            else {
                core.debug(`using cached version of Julia: ${juliaPath}`);
            }
            // Add it to PATH
            core.addPath(path.join(juliaPath, 'bin'));
-            // Test if Julia has been installed by showing versioninfo()
-            yield exec.exec('julia', ['-e', 'using InteractiveUtils; versioninfo()']);
+            // Set output
+            core.setOutput('julia-bindir', path.join(juliaPath, 'bin'));
+            // Test if Julia has been installed and print the version
+            const showVersionInfoInput = core.getInput('show-versioninfo');
+            yield installer.showVersionInfo(showVersionInfoInput, version);
        }
        catch (error) {
            core.setFailed(error.message);
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -1,13 +1,12 @@
 {
  "name": "setup-julia",
-  "version": "0.1.0",
+  "version": "2.2.0",
  "private": true,
  "description": "setup Julia action",
  "main": "lib/setup-julia.js",
  "scripts": {
    "build": "tsc",
-    "format": "prettier --single-quote --print-width 120 --tab-width 4 --no-semi --write **/*.ts",
-    "format-check": "prettier  --single-quote --print-width 120 --tab-width 4 --no-semi --check **/*.ts",
+    "pack": "ncc build",
    "test": "jest"
  },
  "repository": {
@@ -22,21 +21,25 @@
  "author": "Sascha Mann <git@mail.saschamann.eu>",
  "license": "MIT",
  "dependencies": {
-    "@actions/core": "^1.0.0",
-    "@actions/exec": "^1.0.0",
-    "@actions/github": "^1.0.0",
-    "@actions/io": "^1.0.0",
-    "@actions/tool-cache": "^1.0.0",
-    "semver": "^6.3.0"
+    "@actions/core": "^1.10.1",
+    "@actions/exec": "^1.1.1",
+    "@actions/io": "^1.1.3",
+    "@actions/tool-cache": "^2.0.1",
+    "async-retry": "^1.3.3",
+    "semver": "^7.6.2"
  },
  "devDependencies": {
-    "@types/jest": "^24.0.13",
-    "@types/node": "^12.12.7",
-    "@types/semver": "^6.0.0",
-    "jest": "^24.8.0",
-    "jest-circus": "^24.7.1",
-    "prettier": "^1.17.1",
-    "ts-jest": "^24.0.2",
-    "typescript": "^3.5.1"
+    "@types/async-retry": "^1.4.8",
+    "@types/jest": "^29.5.12",
+    "@types/node": "^20.14.6",
+    "@types/retry": "^0.12.5",
+    "@types/semver": "^7.5.8",
+    "@vercel/ncc": "^0.38.1",
+    "jest": "^29.7.0",
+    "jest-circus": "^29.7.0",
+    "nock": "^13.5.4",
+    "prettier": "^3.3.2",
+    "ts-jest": "^29.1.5",
+    "typescript": "^5.4.5"
  }
 }
--- a/src/installer.ts
+++ b/src/installer.ts
@@ -2,29 +2,101 @@ import * as core from '@actions/core'
 import * as exec from '@actions/exec'
 import * as tc from '@actions/tool-cache'

-import * as https from 'https'
+import * as crypto from 'crypto'
+import * as fs from 'fs'
 import * as os from 'os'
 import * as path from 'path'
+import retry = require('async-retry')

 import * as semver from 'semver'

+const LTS_VERSION = '1.6'
+const MAJOR_VERSION = '1' // Could be deduced from versions.json
+
+// Translations between actions input and Julia arch names
+const osMap = {
+    'win32': 'winnt',
+    'darwin': 'mac',
+    'linux': 'linux'
+}
+const archMap = {
+    'x86': 'i686',
+    'x64': 'x86_64',
+    'aarch64': 'aarch64'
+}
+
 // Store information about the environment
 const osPlat = os.platform() // possible values: win32 (Windows), linux (Linux), darwin (macOS)
 core.debug(`platform: ${osPlat}`)

-// This is temporary until we have a better way of fetching releases (see #1, #4 for details)
-export const juliaVersions = ['v1.3.0-rc5', 'v1.3.0-rc4', 'v1.3.0-rc3', 'v1.3.0-rc2', 'v1.0.5', 'v1.2.0', 'v1.3.0-rc1', 'v1.2.0-rc3', 'v1.3.0-alpha', 'v1.2.0-rc2', 'v1.2.0-rc1', 'v1.1.1', 'v1.0.4', 'v1.1.0', 'v1.1.0-rc2', 'v1.1.0-rc1', 'v1.0.3', 'v1.0.2', 'v1.0.1', 'v1.0.0', 'v0.7.0', 'v1.0.0-rc1', 'v0.7.0-rc3', 'v0.7.0-rc2', 'v0.7.0-rc1', 'v0.7.0-beta2', 'v0.6.4', 'v0.7.0-beta', 'v0.7.0-alpha', 'v0.6.3', 'v0.6.2', 'v0.6.1', 'v0.6.0', 'v0.6.0-rc3', 'v0.6.0-rc2', 'v0.5.2', 'v0.6.0-rc1', 'v0.6.0-pre.beta', 'v0.5.1', 'v0.6.0-pre.alpha', 'v0.5.0', 'v0.4.7', 'v0.5.0-rc4', 'v0.5.0-rc3', 'v0.5.0-rc2', 'v0.5.0-rc1', 'v0.5.0-rc0', 'v0.4.6', 'v0.4.5', 'v0.4.4', 'v0.4.3', 'v0.4.2', 'v0.4.1', 'v0.3.12', 'v0.4.0', 'v0.4.0-rc4', 'v0.4.0-rc3', 'v0.4.0-rc2', 'v0.4.0-rc1', 'v0.3.11', 'v0.3.10', 'v0.3.9', 'v0.3.8', 'v0.3.7', 'v0.3.6', 'v0.3.5', 'v0.3.4', 'v0.3.3', 'v0.3.2', 'v0.3.1', 'v0.3.0', 'v0.3.0-rc4', 'v0.3.0-rc3', 'v0.3.0-rc2', 'v0.3.0-rc1', 'v0.2.0-rc1', 'v0.2.0-rc3', 'v0.2.0-rc4', 'v0.2.0', 'v0.2.0-rc2']
+/**
+ * @returns The SHA256 checksum of a given file.
+ */
+async function calculateChecksum(file: string): Promise<string> {
+    const hash = crypto.createHash('sha256')
+    const input = fs.createReadStream(file)

-export async function getJuliaVersion(availableReleases: string[], versionInput: string): Promise<string> {
-    if (semver.valid(versionInput) == versionInput) {
-        // versionInput is a valid version, use it directly
+    return new Promise((resolve, reject) => {
+        input.on('data', (chunk) => {
+            hash.update(chunk)
+        })
+
+        input.on('end', () => {
+            const digest = hash.digest('hex')
+            digest ? resolve(digest) : reject(new Error(`Could not calculate checksum of file ${file}: digest was empty.`))
+        })
+    })
+}
+
+/**
+ * @returns The content of the downloaded versions.json file as object.
+ */
+export async function getJuliaVersionInfo(): Promise<object> {
+    // Occasionally the connection is reset for unknown reasons
+    // In those cases, retry the download
+    const versionsFile = await retry(async (bail: Function) => {
+        return await tc.downloadTool('https://julialang-s3.julialang.org/bin/versions.json')
+    }, {
+        retries: 5,
+        onRetry: (err: Error) => {
+            core.info(`Download of versions.json failed, trying again. Error: ${err}`)
+        }
+    })
+
+    return JSON.parse(fs.readFileSync(versionsFile).toString())
+}
+
+/**
+ * @returns An array of all Julia versions available for download
+ */
+export async function getJuliaVersions(versionInfo): Promise<string[]> {
+    let versions: string[] = []
+
+    for (let version in versionInfo) {
+        versions.push(version)
+    }
+
+    return versions
+}
+
+export function getJuliaVersion(availableReleases: string[], versionInput: string, includePrerelease: boolean = false): string {
+    if (semver.valid(versionInput) == versionInput || versionInput.endsWith('nightly')) {
+        // versionInput is a valid version or a nightly version, use it directly
        return versionInput
    }

+    if (versionInput == 'lts') {
+        return getJuliaVersion(availableReleases, LTS_VERSION, false)
+    }
+
+    if (versionInput == 'pre') {
+        return getJuliaVersion(availableReleases, MAJOR_VERSION, true)
+    }
+
    // Use the highest available version that matches versionInput
-    let version = semver.maxSatisfying(availableReleases, versionInput)
+    let version = semver.maxSatisfying(availableReleases, versionInput, {includePrerelease})
    if (version == null) {
-        throw `Could not find a Julia version that matches ${versionInput}`
+        throw new Error(`Could not find a Julia version that matches ${versionInput}`)
    }

    // GitHub tags start with v, remove it
@@ -33,72 +105,231 @@ export async function getJuliaVersion(availableReleases: string[], versionInput:
    return version
 }

-function getMajorMinorVersion(version: string): string {
-    return version.split('.').slice(0, 2).join('.')
-}
+function getDesiredFileExts(): [string, boolean, string] {
+    let fileExt1: string
+    let hasFileExt2: boolean
+    let fileExt2: string

-function getDownloadURL(version: string, arch: string): string {
-    const baseURL = 'https://julialang-s3.julialang.org/bin'
-    let platform: string
-    const versionDir = getMajorMinorVersion(version)
-
-    if (osPlat === 'win32') { // Windows
-        platform = 'winnt'
-    } else if (osPlat === 'darwin') { // macOS
-        if (arch == 'x86') {
-            throw '32-bit Julia is not available on macOS'
-        }
-        platform = 'mac'
-    } else if (osPlat === 'linux') { // Linux
-        platform = 'linux'
+    if (osPlat == 'win32') {
+        fileExt1 = 'tar.gz'
+        hasFileExt2 = true
+        fileExt2 = 'exe'
+    } else if (osPlat == 'darwin') {
+        fileExt1 = 'tar.gz'
+        hasFileExt2 = true
+        fileExt2 = 'dmg'
+    } else if (osPlat === 'linux') {
+        fileExt1 = 'tar.gz'
+        hasFileExt2 = false
+        fileExt2 = ''
    } else {
-        throw `Platform ${osPlat} is not supported`
+        throw new Error(`Platform ${osPlat} is not supported`)
    }

-    return `${baseURL}/${platform}/${arch}/${versionDir}/${getFileName(version, arch)}`
+    return [fileExt1, hasFileExt2, fileExt2]
 }

-function getFileName(version: string, arch: string): string {
-    let versionExt: string, ext: string
+function getNightlyFileName(arch: string): string {
+    let versionExt: string
+    let fileExt1: string
+    [fileExt1, , ] = getDesiredFileExts()

-    if (osPlat === 'win32') { // Windows
-        versionExt = arch == 'x64' ? '-win64' : '-win32'
-        ext = 'exe'
-    } else if (osPlat === 'darwin') { // macOS
+    if (osPlat == 'win32') {
        if (arch == 'x86') {
-            throw '32-bit Julia is not available on macOS'
+            versionExt = '-win32'
+        } else if (arch == 'aarch64') {
+            throw new Error('Aarch64 Julia is not available on Windows')
+        } else if (arch == 'x64') {
+            versionExt = '-win64'
+        } else {
+            throw new Error(`Architecture ${arch} is not supported on Windows`)
+        }
+    } else if (osPlat == 'darwin') {
+        if (arch == 'x86') {
+            throw new Error('32-bit (x86) Julia is not available on macOS')
+        } else if (arch == 'aarch64') {
+            versionExt = '-macaarch64'
+        } else if (arch == 'x64') {
+            versionExt = '-mac64'
+        } else {
+            throw new Error(`Architecture ${arch} is not supported on macOS`)
+        }
+    } else if (osPlat === 'linux') {
+        if (arch == 'x86') {
+            versionExt = '-linux32'
+        } else if (arch == 'aarch64') {
+            versionExt = '-linux-aarch64'
+        } else if (arch == 'x64') {
+            versionExt = '-linux64'
+        } else {
+            throw new Error(`Architecture ${arch} is not supported on Linux`)
        }
-        versionExt = '-mac64'
-        ext = 'dmg'
-    } else if (osPlat === 'linux') { // Linux
-        versionExt = arch == 'x64' ? '-linux-x86_64' : '-linux-i686'
-        ext = 'tar.gz'
    } else {
-        throw `Platform ${osPlat} is not supported`
+        throw new Error(`Platform ${osPlat} is not supported`)
    }

-    return `julia-${version}${versionExt}.${ext}`
+    return `julia-latest${versionExt}.${fileExt1}`
 }

-export async function installJulia(version: string, arch: string): Promise<string> {
+export function getFileInfo(versionInfo, version: string, arch: string) {
+    const err = `Could not find ${archMap[arch]}/${version} binaries`
+
+    let fileExt1: string
+    let hasFileExt2: boolean
+    let fileExt2: string
+    [fileExt1, hasFileExt2, fileExt2] = getDesiredFileExts()
+
+    if (version.endsWith('nightly')) {
+        return null
+    }
+
+    if (!versionInfo[version]) {
+       throw err
+    }
+
+    for (let file of versionInfo[version].files) {
+        if (file.os == osMap[osPlat] && file.arch == archMap[arch]) {
+            if (file.extension == fileExt1) {
+                return file
+            }
+        }
+    }
+
+    if (hasFileExt2) {
+        core.debug(`Could not find ${fileExt1}; trying to find ${fileExt2} instead`)
+        for (let file of versionInfo[version].files) {
+            if (file.os == osMap[osPlat] && file.arch == archMap[arch]) {
+                if (file.extension == fileExt2) {
+                    return file
+                }
+            }
+        }
+    }
+
+    throw err
+}
+
+export function getDownloadURL(fileInfo, version: string, arch: string): string {
+    const baseURL = `https://julialangnightlies-s3.julialang.org/bin/${osMap[osPlat]}/${arch}`
+
+    // release branch nightlies, e.g. 1.6-nightlies should return .../bin/linux/x64/1.6/julia-latest-linux64.tar.gz
+    const majorMinorMatches = /^(\d*.\d*)-nightly/.exec(version)
+    if (majorMinorMatches) {
+        return `${baseURL}/${majorMinorMatches[1]}/${getNightlyFileName(arch)}`
+    }
+
+    // nightlies
+    if (version == 'nightly') {
+        return `${baseURL}/${getNightlyFileName(arch)}`
+    }
+
+    // Verify that fileInfo.url points at the official Julia download servers
+    if (!fileInfo.url.startsWith('https://julialang-s3.julialang.org/')) {
+        throw new Error(`versions.json points at a download location outside of Julia's download server: ${fileInfo.url}. Aborting for security reasons.`)
+    }
+    return fileInfo.url
+}
+
+export async function installJulia(dest: string, versionInfo, version: string, arch: string): Promise<string> {
    // Download Julia
-    const downloadURL = getDownloadURL(version, arch)
+    const fileInfo = getFileInfo(versionInfo, version, arch)
+    const downloadURL = getDownloadURL(fileInfo, version, arch)
    core.debug(`downloading Julia from ${downloadURL}`)
-    const juliaDownloadPath = await tc.downloadTool(downloadURL)
+
+    // Occasionally the connection is reset for unknown reasons
+    // In those cases, retry the download
+    const juliaDownloadPath = await retry(async (bail: Function) => {
+        return await tc.downloadTool(downloadURL)
+    }, {
+        retries: 5,
+        onRetry: (err: Error) => {
+            core.info(`Download of ${downloadURL} failed, trying again. Error: ${err}`)
+        }
+    })
+
+    // Verify checksum
+    if (!version.endsWith('nightly')) {
+        const checkSum = await calculateChecksum(juliaDownloadPath)
+        if (fileInfo.sha256 != checkSum) {
+            throw new Error(`Checksum of downloaded file does not match the expected checksum from versions.json.\nExpected: ${fileInfo.sha256}\nGot: ${checkSum}`)
+        }
+        core.debug(`Checksum of downloaded file matches expected checksum: ${checkSum}`)
+    } else {
+        core.debug('Skipping checksum check for nightly binaries.')
+    }

    // Install it
    switch (osPlat) {
        case 'linux':
-            const juliaExtractedFolder = await tc.extractTar(juliaDownloadPath)
-            return path.join(juliaExtractedFolder, `julia-${version}`)
+            // tc.extractTar doesn't support stripping components, so we have to call tar manually
+            await exec.exec('tar', ['xf', juliaDownloadPath, '--strip-components=1', '-C', dest])
+            return dest
        case 'win32':
-            const juliaInstallationPath = path.join('C:', 'Julia')
-            await exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/S /D=${juliaInstallationPath}" -NoNewWindow -Wait`])
-            return juliaInstallationPath
+            if (fileInfo !== null && fileInfo.extension == 'exe') {
+                if (version.endsWith('nightly') || semver.gtr(version, '1.3', {includePrerelease: true})) {
+                    // The installer changed in 1.4: https://github.com/JuliaLang/julia/blob/ef0c9108b12f3ae177c51037934351ffa703b0b5/NEWS.md#build-system-changes
+                    await exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/SILENT /dir=${path.join(process.cwd(), dest)}" -NoNewWindow -Wait`])
+                } else {
+                    await exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/S /D=${path.join(process.cwd(), dest)}" -NoNewWindow -Wait`])
+                }
+            } else {
+                // This is the more common path. Using .tar.gz is much faster
+                // don't use the Git bash provided tar. Issue #205
+                // https://github.com/julia-actions/setup-julia/issues/205
+                await exec.exec('powershell', ['-Command', `& "$env:WINDIR/System32/tar" xf ${juliaDownloadPath} --strip-components=1 -C ${dest}`])
+            }
+            return dest
        case 'darwin':
-            await exec.exec('hdiutil', ['attach', juliaDownloadPath])
-            return `/Volumes/Julia-${version}/Julia-${getMajorMinorVersion(version)}.app/Contents/Resources/julia`
+            if (fileInfo !== null && fileInfo.extension == 'dmg') {
+                core.debug(`Support for .dmg files is deprecated and may be removed in a future release`)
+                await exec.exec('hdiutil', ['attach', juliaDownloadPath])
+                await exec.exec('/bin/bash', ['-c', `cp -a /Volumes/Julia-*/Julia-*.app/Contents/Resources/julia ${dest}`])
+                return path.join(dest, 'julia')
+            } else {
+                // tc.extractTar doesn't support stripping components, so we have to call tar manually
+                await exec.exec('tar', ['xf', juliaDownloadPath, '--strip-components=1', '-C', dest])
+                return dest
+            }
        default:
-            throw `Platform ${osPlat} is not supported`
+            throw new Error(`Platform ${osPlat} is not supported`)
+    }
+}
+
+/**
+ * Test if Julia has been installed and print the version.
+ *
+ * true => always show versioninfo
+ * false => only show on nightlies
+ * never => never show it anywhere
+ *
+ * @param showVersionInfoInput
+ */
+export async function showVersionInfo(showVersionInfoInput: string, version: string): Promise<void> {
+    // --compile=min -O0 reduces the time from ~1.8-1.9s to ~0.8-0.9s
+    let exitCode: number
+
+    switch (showVersionInfoInput) {
+        case 'true':
+            exitCode = await exec.exec('julia', ['--compile=min', '-O0', '-e', 'using InteractiveUtils; versioninfo()'])
+            break
+
+        case 'false':
+            if (version.endsWith('nightly')) {
+                exitCode = await exec.exec('julia', ['--compile=min', '-O0', '-e', 'using InteractiveUtils; versioninfo()'])
+            } else {
+                exitCode = await exec.exec('julia', ['--version'])
+            }
+            break
+
+        case 'never':
+            exitCode = await exec.exec('julia', ['--version'])
+            break
+
+        default:
+            throw new Error(`${showVersionInfoInput} is not a valid value for show-versioninfo. Supported values: true | false | never`)
+    }
+
+    if (exitCode !== 0) {
+        throw new Error(`Julia could not be installed properly. Exit code: ${exitCode}`)
    }
 }
--- a/src/setup-julia.ts
+++ b/src/setup-julia.ts
@@ -1,41 +1,103 @@
 import * as core from '@actions/core'
-import * as exec from '@actions/exec'
 import * as tc from '@actions/tool-cache'

+import * as fs from 'fs'
+import * as https from 'https'
 import * as path from 'path'

 import * as installer from './installer'

+const archSynonyms = {
+    'x86': 'x86',
+    'X86': 'x86',
+    'x64': 'x64',
+    'X64': 'x64',
+    'aarch64': 'aarch64',
+    'ARM64': 'aarch64',
+    'arm64': 'aarch64'
+}
+
 async function run() {
    try {
+        // Debugging info
+        if (core.isDebug()) {
+            // Log Runner IP Address
+            https.get('https://httpbin.julialang.org/ip', resp => {
+                let data = ''
+
+                resp.on('data', chunk => {
+                    data += chunk
+                })
+
+                resp.on('end', () => {
+                    core.debug(`Runner IP address: ${JSON.parse(data).origin}`)
+                })
+            }).on('error', err => {
+                core.debug(`ERROR: Could not retrieve runner IP: ${err}`)
+            })
+        }
+
+        // Inputs
        const versionInput = core.getInput('version')
-        const arch = core.getInput('arch')
-        const availableReleases = installer.juliaVersions
-        const version = await installer.getJuliaVersion(availableReleases, versionInput)
+        const includePrereleases = core.getInput('include-all-prereleases') == 'true'
+        const originalArchInput = core.getInput('arch')
+
+        // It can easily happen that, for example, a workflow file contains an input `version: ${{ matrix.julia-version }}`
+        // while the strategy matrix only contains a key `${{ matrix.version }}`.
+        // In that case, we want the action to fail, rather than trying to download julia from an URL that's missing parts and 404ing.
+        // We _could_ fall back to the default but that means that builds silently do things differently than they're meant to, which
+        // is worse than failing the build.
+        if (!versionInput) {
+            throw new Error('Version input must not be null')
+        }
+        if (!originalArchInput) {
+            throw new Error(`Arch input must not be null`)
+        }
+
+        const arch = archSynonyms[originalArchInput]
+
+        const versionInfo = await installer.getJuliaVersionInfo()
+        const availableReleases = await installer.getJuliaVersions(versionInfo)
+        const version = installer.getJuliaVersion(availableReleases, versionInput, includePrereleases)
        core.debug(`selected Julia version: ${arch}/${version}`)
+        core.setOutput('julia-version', version)

        // Search in cache
        let juliaPath: string;
        juliaPath = tc.find('julia', version, arch)

        if (!juliaPath) {
-            core.debug(`could not find Julia ${version} in cache`)
-            const juliaInstallationPath = await installer.installJulia(version, arch);
+            core.debug(`could not find Julia ${arch}/${version} in cache`)
+
+            // https://github.com/julia-actions/setup-julia/pull/196
+            // we want julia to be installed with unmodified file mtimes
+            // but `tc.cacheDir` uses `cp` internally which destroys mtime
+            // and `tc` provides no API to get the tool directory alone
+            // so hack it by installing a empty directory then use the path it returns
+            // and extract the archives directly to that location
+            const emptyDir = fs.mkdtempSync('empty')
+            juliaPath = await tc.cacheDir(emptyDir, 'julia', version, arch)
+            await installer.installJulia(juliaPath, versionInfo, version, arch)

-            // Add it to cache
-            juliaPath = await tc.cacheDir(juliaInstallationPath, 'julia', version, arch)
            core.debug(`added Julia to cache: ${juliaPath}`)
+
+            // Remove empty dir
+            fs.rmdirSync(emptyDir)
        } else {
            core.debug(`using cached version of Julia: ${juliaPath}`)
        }

        // Add it to PATH
        core.addPath(path.join(juliaPath, 'bin'))
-        
-        // Test if Julia has been installed by showing versioninfo()
-        await exec.exec('julia', ['-e', 'using InteractiveUtils; versioninfo()'])
+
+        // Set output
+        core.setOutput('julia-bindir', path.join(juliaPath, 'bin'))
+
+        // Test if Julia has been installed and print the version
+        const showVersionInfoInput = core.getInput('show-versioninfo')
+        await installer.showVersionInfo(showVersionInfoInput, version)
    } catch (error) {
-        core.setFailed(error.message)
+        core.setFailed((error as Error).message)
    }
 }