Add production dependencies & build

* Support release nightlies

See #62

* Replace == nightly with endsWith nightly

* Use majorMinorMatch, not full match

* Replace more (in-)equality checks

* Reduce number of duplicate CI builds

* Add example to docs

* Tidy up nightly conditions

.gitattributes

@@ -0,0 +1,2 @@
+# Hide generated JS code from diffs and language stats
+lib/*.js linguist-generated=true

.github/CODEOWNERS

@@ -0,0 +1 @@
+*       @julia-actions/reviewers

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,29 @@
+---
+name: Bug report
+about: Create a report to help us improve
+title: "[BUG] "
+labels: bug
+assignees: SaschaMann
+
+---
+
+**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.

.github/workflows/backup.yml

@@ -0,0 +1,33 @@
+name: Backup
+
+on:
+  schedule:
+    - cron: '5 4 * * 0'
+
+  workflow_dispatch:
+
+jobs:
+  backup:
+    runs-on: ubuntu-20.04
+
+    steps:
+      - name: Configure cache
+        uses: actions/cache@v2
+        with:
+          path: |
+            ${{ env.GITHUB_WORKSPACE }}
+            ~/.cache/restic
+          key: ${{ runner.os }}
+
+      - name: Install the correct Python version
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3.x'
+
+      - name: Run backup action
+        uses: julia-actions/restic-action@main
+        env: # Options: https://restic.readthedocs.io/en/latest/040_backup.html#environment-variables
+          RESTIC_REPOSITORY: b2:${{ secrets.B2_BUCKET }}:${{ github.repository }}
+          RESTIC_PASSWORD: ${{ secrets.RESTIC_PASSWORD }}
+          B2_ACCOUNT_ID: ${{ secrets.B2_ACCOUNT_ID }}
+          B2_ACCOUNT_KEY: ${{ secrets.B2_ACCOUNT_KEY }}

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,67 @@
+# 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"
+
+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
+
+    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@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      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@v1
+
+    # 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@v1

.github/workflows/example-builds-nightly.yml

@@ -0,0 +1,39 @@
+name: Example builds (nightly)
+
+on:
+  push:
+    branches: ['main', 'master', 'releases/*']
+  pull_request:
+  schedule:
+    - cron: '37 17 * * *'
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        julia-version: [nightly, 1.6-nightly]
+        julia-arch: [x64, x86]
+        os: [ubuntu-latest, macOS-latest, windows-latest]
+        # 32-bit Julia binaries are not available on macOS
+        exclude:
+          - os: macOS-latest
+            julia-arch: x86
+    
+    steps:
+      - uses: actions/checkout@v1.0.0
+      
+      - name: "Install dependencies"
+        run: |
+          npm install
+          npm run build
+          npm run pack
+
+      - name: "Set up Julia (${{ matrix.julia-version }})"
+        uses: ./
+        with:
+          version: ${{ matrix.julia-version }}
+          arch: ${{ matrix.julia-arch }}
+          show-versioninfo: 'true'
+      - run: julia --version

.github/workflows/example-builds.yml

@@ -0,0 +1,38 @@
+name: Example builds
+
+on:
+  push:
+    branches: ['main', 'master', 'releases/*']
+  pull_request:
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        julia-version: ['1.0.5', '1', '^1.5.0-beta1']
+        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@v1.0.0
+
+      - name: "Install dependencies"
+        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 }}
+          show-versioninfo: 'true'
+      - run: julia --version

.gitignore

@@ -1,2 +1,3 @@
 node_modules/
 __tests__/runner/*
+!dist/

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "bin"]
+	path = bin
+	url = git@github.com:julia-actions/bin.git

CONTRIBUTING.md

@@ -0,0 +1,11 @@
+# Dev docs / Contributing guide
+
+## Building and tagging a release (requires write access)
+
+1. Test your changes, merge into `master`.
+2. Checkout `master`.
+3. Bump the version number in [`package.json`](package.json).
+4. Run `./bin/build-release julia-actions/setup-julia` to create a release branch and build a release.
+5. Push the branch (**without tags**) and verify that CI is passing on it.
+6. Run `git push --tags --force` to update the tags.
+7. Create a release for the `vX.Y.Z` tag.

README.md

@@ -1,33 +1,107 @@
 # setup-julia Action
 
+[![CodeQL](https://github.com/julia-actions/setup-julia/workflows/CodeQL/badge.svg)](https://securitylab.github.com/tools/codeql)
+[![Dependabot Status](https://api.dependabot.com/badges/status?host=github&repo=julia-actions/setup-julia)](https://dependabot.com)
+
 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)
-- [Words of caution](#words-of-caution)
-- [Licence info](#licence-info)
+- [Debug logs](#debug-logs)
+- [Third party information](#third-party-information)
 
 ## Usage
 
-See [action.yml](action.yml).
+### Inputs
 
-Take a look at [github.com/exercism/julia](https://github.com/exercism/julia/pull/153) for an example, non-package Julia project making use of this action.
+```yaml
+- uses: julia-actions/setup-julia@v1
+  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: ''
 
-### Basic:
+    # The architecture of the Julia binaries.
+    #
+    # Supported values: x64 | x86
+    #
+    # Default: x64
+    arch: ''
+
+    # If true, display the output of InteractiveUtils.versioninfo() after installing.
+    # See "versioninfo" below for example usage.
+    #
+    # 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@v0.1.0
+- uses: julia-actions/setup-julia@v1
   with:
     version: 1.0.4
 - run: julia -e 'println("Hello, World!")'
 ```
 
-### Matrix Testing:
+### Julia Versions
+
+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` 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`, excluding pre-releases.
+- `^1.3.0-rc1` is a **caret** version range that includes pre-releases 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 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. 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. It matches all versions `≥ 1.3.0-` and `< 1.4.0`.
+- `nightly` will install the latest nightly build.
+- `1.6-nightly` will install the latest nightly build for the upcoming 1.6 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. You can test what version will be selected for a given input in this JavaScript [REPL](https://repl.it/@SaschaMann/setup-julia-version-logic).
+
+The available Julia versions are pulled from [`versions.json`](https://julialang-s3.julialang.org/bin/versions.json). This file is automatically updated once a day. Therefore it may take up to 24 hours until a newly released Julia version is available in the action.
+
+### 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
 
@@ -37,16 +111,17 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        julia-version: [1.0.4, 1.1.1, 1.2.0-rc3, 1.3.0-alpha]
+        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
       - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.1.0
+        uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
       - run: julia -e 'println("Hello, World!")'
+        shell: bash
 ```
 
 #### 32-bit Julia
@@ -57,7 +132,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        julia-version: [1.0.4, 1.1.1, 1.2.0-rc3, 1.3.0-alpha]
+        julia-version: ['1.0', '1.2.0', '^1.3.0-rc1']
         julia-arch: [x64, x86]
         os: [ubuntu-latest, windows-latest, macOS-latest]
         # 32-bit Julia binaries are not available on macOS
@@ -68,11 +143,12 @@ jobs:
     steps:
       - uses: actions/checkout@v1.0.0
       - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.1.0
+        uses: julia-actions/setup-julia@v1
         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:
@@ -83,28 +159,44 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        julia-version: [1.0.4, 1.1.1, 1.2.0-rc3, 1.3.0-alpha]
+        julia-version: ['1.0', '1.2.0', '^1.3.0-rc1']
         os: [ubuntu-latest, windows-latest, macOS-latest]
         # Additionally create a job using 32-bit Julia 1.0.4 on windows-latest
         include:
           - os: windows-latest
-            julia-version: [1.0.4]
+            julia-version: ['1.0.4']
             julia-arch: x86
     
     steps:
       - uses: actions/checkout@v1.0.0
       - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.1.0
+        uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
       - run: julia -e 'println("Hello, World!")'
+        shell: bash
 ```
 
+### versioninfo
+
+By default, only a brief version identifier is printed in the run log. You can display the full `versioninfo` by adding `show-versioninfo`.
+Here's an example that prints this information just for `nightly`:
+
+```yaml
+    - uses: julia-actions/setup-julia@v1
+      with:
+        version: ${{ matrix.version }}
+        arch: ${{ matrix.arch }}
+        show-versioninfo: ${{ matrix.version == 'nightly' }}
+ ```
+ 
+You use `'true'` if you want it printed for all Julia versions.
+
 ## 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.
+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.
 
@@ -112,41 +204,22 @@ 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@d3ce119a16594ea9e5d7974813970c73b6ab9e94 # commit SHA of the tagged 1.4.1 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@v1.4    # minor version tag
+  - uses: julia-actions/setup-julia@v1.4.1  # 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:
+## Debug logs
 
-### `setup-julia`:
-* Check if a cached version of Julia is available instead of installing it everytime CI runs.
-* Add version shortcuts like `1.x`, `1.1.x`, `latest` and `lts`.
-* Add support for nightly Julia builds.
-* Write some unit tests for the action.
-* Add CI script that checks if tags have been updated on release.
-* Hash and signature checks.
+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.
 
-### Other Julia-related actions:
-
-These would be nice to have but I make no promises of ever creating them myself.
-
-* Default build script for packages, similar to how Travis CI works if you don't specify a script.
-* Find out if it's possible to cache packages using [`@actions/tool-cache`](https://github.com/actions/toolkit/tree/master/packages/tool-cache).
-* Actions for standard tools like Documenter, Coverage reporting and so on
-* Actions for registering and tagging package releases instead of relying on external apps.
-
-## Words of caution
-
-This action will likely be updated quite frequently in the near future. I'm sharing it now so that others who want to try out Julia on GitHub actions can do so without relying on Docker.
-
-**DO NOT USE THIS AS YOUR ONLY FORM OF CI** (yet).
-
-Unfortunately, because non-container actions must use JavaScript/TypeScript as scripting language, `npm` is involved. The published action only uses the toolkit-dependencies maintained by GitHub but, as usual with `npm`, these load over 50 transitive dependencies. If this causes issues with your security policies, you might want to fork the action, so that you can audit and lock exact versions of all direct and transitive dependencies.
-
-## Licence info
-Parts of this software have been derived from the `setup-go` [action](https://github.com/actions/setup-go) and the [JavaScript Action Template](https://github.com/actions/javascript-template), both released by GitHub under the MIT licence.
+## 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.

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.

__tests__/installer.test.ts

@@ -0,0 +1,113 @@
+// 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 nock = require('nock')
+import * as semver from 'semver'
+
+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-alpha', '1.3.0-rc1',       '1.3.0-rc2',      '1.3.0-rc3',
+    '1.3.0-rc4'
+]
+
+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')
+        })
+    })
+
+    describe('version ranges', () => {
+        it('Chooses the highest available version that matches the input', () => {
+            expect(installer.getJuliaVersion(testVersions, '1')).toEqual('1.2.0')
+            expect(installer.getJuliaVersion(testVersions, '1.0')).toEqual('1.0.5')
+            expect(installer.getJuliaVersion(testVersions, '^1.3.0-rc1')).toEqual('1.3.0-rc4')
+            expect(installer.getJuliaVersion(testVersions, '^1.2.0-rc1')).toEqual('1.2.0')
+        })
+    })
+
+    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())
+        })
+    })
+})

__tests__/main.test.ts

@@ -1,3 +0,0 @@
-describe('TODO - Add a test suite', () => {
-    it('TODO - Add a test', async () => {})
-})

action.yml

@@ -4,14 +4,23 @@ author: 'Sascha Mann'
 inputs: 
   version:
     description: 'The Julia version to download (if necessary) and use. Example: 1.0.4'
-    default: '1.0.4'
+    default: '1'
   arch:
     description: 'Architecture of the Julia binaries. Defaults to x64.'
     required: false
     default: 'x64'
+  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'
+  main: 'dist/index.js'
 branding:
   icon: 'download'
   color: 'green'

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

lib/installer.js

@@ -0,0 +1,186 @@
+"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 __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;
+    return result;
+};
+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 crypto = __importStar(require("crypto"));
+const fs = __importStar(require("fs"));
+const os = __importStar(require("os"));
+const path = __importStar(require("path"));
+const semver = __importStar(require("semver"));
+// Translations between actions input and Julia arch names
+const osMap = {
+    'win32': 'winnt',
+    'darwin': 'mac',
+    'linux': 'linux'
+};
+const archMap = {
+    'x86': 'i686',
+    'x64': 'x86_64'
+};
+// Store information about the environment
+const osPlat = os.platform(); // possible values: win32 (Windows), linux (Linux), darwin (macOS)
+core.debug(`platform: ${osPlat}`);
+/**
+ * @returns The SHA256 checksum of a given file.
+ */
+function calculateChecksum(file) {
+    return __awaiter(this, void 0, void 0, function* () {
+        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* () {
+        const versionsFile = yield tc.downloadTool('https://julialang-s3.julialang.org/bin/versions.json');
+        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) {
+    if (semver.valid(versionInput) == versionInput || versionInput.endsWith('nightly')) {
+        // versionInput is a valid version or a nightly version, use it directly
+        return versionInput;
+    }
+    // Use the highest available version that matches versionInput
+    let version = semver.maxSatisfying(availableReleases, versionInput);
+    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 getNightlyFileName(arch) {
+    let versionExt, ext;
+    if (osPlat == 'win32') {
+        versionExt = arch == 'x64' ? '-win64' : '-win32';
+        ext = 'exe';
+    }
+    else if (osPlat == 'darwin') {
+        if (arch == 'x86') {
+            throw new Error('32-bit Julia is not available on macOS');
+        }
+        versionExt = '-mac64';
+        ext = 'dmg';
+    }
+    else if (osPlat === 'linux') {
+        versionExt = arch == 'x64' ? '-linux64' : '-linux32';
+        ext = 'tar.gz';
+    }
+    else {
+        throw new Error(`Platform ${osPlat} is not supported`);
+    }
+    return `julia-latest${versionExt}.${ext}`;
+}
+function getFileInfo(versionInfo, version, arch) {
+    if (version.endsWith('nightly')) {
+        return null;
+    }
+    for (let file of versionInfo[version].files) {
+        if (file.os == osMap[osPlat] && file.arch == archMap[arch]) {
+            return file;
+        }
+    }
+    throw `Could not find ${archMap[arch]}/${version} binaries`;
+}
+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)}`;
+    }
+    return fileInfo.url;
+}
+exports.getDownloadURL = getDownloadURL;
+function installJulia(versionInfo, version, arch) {
+    return __awaiter(this, void 0, void 0, function* () {
+        // Download Julia
+        const fileInfo = getFileInfo(versionInfo, version, arch);
+        const downloadURL = getDownloadURL(fileInfo, version, arch);
+        core.debug(`downloading Julia from ${downloadURL}`);
+        const juliaDownloadPath = yield tc.downloadTool(downloadURL);
+        // 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: ${checkSum}`);
+        }
+        else {
+            core.debug('Skipping checksum check for nightly binaries.');
+        }
+        const tempInstallDir = fs.mkdtempSync(`julia-${arch}-${version}-`);
+        // Install it
+        switch (osPlat) {
+            case 'linux':
+                // tc.extractTar doesn't support stripping components, so we have to call tar manually
+                yield exec.exec('tar', ['xf', juliaDownloadPath, '--strip-components=1', '-C', tempInstallDir]);
+                return tempInstallDir;
+            case 'win32':
+                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(), tempInstallDir)}" -NoNewWindow -Wait`]);
+                }
+                else {
+                    yield exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/S /D=${path.join(process.cwd(), tempInstallDir)}" -NoNewWindow -Wait`]);
+                }
+                return tempInstallDir;
+            case 'darwin':
+                yield exec.exec('hdiutil', ['attach', juliaDownloadPath]);
+                yield exec.exec('/bin/bash', ['-c', `cp -a /Volumes/Julia-*/Julia-*.app/Contents/Resources/julia ${tempInstallDir}`]);
+                return path.join(tempInstallDir, 'julia');
+            default:
+                throw new Error(`Platform ${osPlat} is not supported`);
+        }
+    });
+}
+exports.installJulia = installJulia;

lib/setup-julia.js

@@ -18,103 +18,76 @@ 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 os = __importStar(require("os"));
+const fs = __importStar(require("fs"));
+const https = __importStar(require("https"));
 const path = __importStar(require("path"));
-// Store information about the environment
-const osPlat = os.platform(); // possible values: win32 (Windows), linux (Linux), darwin (macOS)
-core.debug(`platform: ${osPlat}`);
-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';
-    }
-    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';
-    }
-    else {
-        throw `Platform ${osPlat} is not supported`;
-    }
-    return `${baseURL}/${platform}/${arch}/${versionDir}/${getFileName(version, arch)}`;
-}
-function getFileName(version, arch) {
-    let versionExt, ext;
-    if (osPlat === 'win32') { // Windows
-        versionExt = arch == 'x64' ? '-win64' : '-win32';
-        ext = 'exe';
-    }
-    else if (osPlat === 'darwin') { // macOS
-        if (arch == 'x86') {
-            throw '32-bit Julia is not available on macOS';
-        }
-        versionExt = '-mac64';
-        ext = 'dmg';
-    }
-    else if (osPlat === 'linux') { // Linux
-        versionExt = arch == 'x64' ? '-linux-x86_64' : '-linux-i686';
-        ext = 'tar.gz';
-    }
-    else {
-        throw `Platform ${osPlat} is not supported`;
-    }
-    return `julia-${version}${versionExt}.${ext}`;
-}
-function installJulia(version, arch) {
-    return __awaiter(this, void 0, void 0, function* () {
-        // Download Julia
-        const downloadURL = getDownloadURL(version, arch);
-        core.debug(`downloading Julia from ${downloadURL}`);
-        const juliaDownloadPath = yield tc.downloadTool(downloadURL);
-        // Install it
-        switch (osPlat) {
-            case 'linux':
-                const juliaExtractedFolder = yield tc.extractTar(juliaDownloadPath);
-                return path.join(juliaExtractedFolder, `julia-${version}`);
-            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;
-            case 'darwin':
-                yield exec.exec('hdiutil', ['attach', juliaDownloadPath]);
-                return `/Volumes/Julia-${version}/Julia-${getMajorMinorVersion(version)}.app/Contents/Resources/julia`;
-            default:
-                throw `Platform ${osPlat} is not supported`;
-        }
-    });
-}
+const installer = __importStar(require("./installer"));
 function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
-            const version = core.getInput('version');
+            // 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');
+            // 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 (!arch) {
+                throw new Error(`Arch input must not be null`);
+            }
+            const versionInfo = yield installer.getJuliaVersionInfo();
+            const availableReleases = yield installer.getJuliaVersions(versionInfo);
+            const version = installer.getJuliaVersion(availableReleases, versionInput);
             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 installJulia(version, arch);
+                core.debug(`could not find Julia ${arch}/${version} in cache`);
+                const juliaInstallationPath = yield installer.installJulia(versionInfo, version, arch);
                 // Add it to cache
                 juliaPath = yield tc.cacheDir(juliaInstallationPath, 'julia', version, arch);
                 core.debug(`added Julia to cache: ${juliaPath}`);
+                // Remove temporary dir
+                fs.rmdirSync(juliaInstallationPath, { recursive: true });
             }
             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
+            if (core.getInput('show-versioninfo') == 'true') {
+                // If enabled, show the full version info
+                // --compile=min -O0 reduces the time from ~1.8-1.9s to ~0.8-0.9s
+                exec.exec('julia', ['--compile=min', '-O0', '-e', 'using InteractiveUtils; versioninfo()']);
+            }
+            else {
+                // Otherwise only print julia --version to save time
+                exec.exec('julia', ['--version']);
+            }
         }
         catch (error) {
             core.setFailed(error.message);

package.json

@@ -1,13 +1,12 @@
 {
   "name": "setup-julia",
-  "version": "0.1.0",
+  "version": "1.5.2",
   "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 +21,22 @@
   "author": "Sascha Mann <git@mail.saschamann.eu>",
   "license": "MIT",
   "dependencies": {
-    "@actions/core": "^1.0.0",
-    "@actions/io": "^1.0.0",
+    "@actions/core": "^1.2.6",
     "@actions/exec": "^1.0.0",
-    "@actions/github": "^1.0.0",
+    "@actions/io": "^1.0.0",
     "@actions/tool-cache": "^1.0.0",
-    "semver": "^6.1.1"
+    "semver": "^6.3.0"
   },
   "devDependencies": {
     "@types/jest": "^24.0.13",
-    "@types/node": "^12.0.4",
+    "@types/node": "^12.12.7",
     "@types/semver": "^6.0.0",
+    "@zeit/ncc": "^0.22.0",
     "jest": "^24.8.0",
     "jest-circus": "^24.7.1",
+    "nock": "^11.7.2",
     "prettier": "^1.17.1",
-    "ts-jest": "^24.0.2",
+    "ts-jest": "^26.0.0",
     "typescript": "^3.5.1"
   }
 }

src/installer.ts

@@ -0,0 +1,180 @@
+import * as core from '@actions/core'
+import * as exec from '@actions/exec'
+import * as tc from '@actions/tool-cache'
+
+import * as crypto from 'crypto'
+import * as fs from 'fs'
+import * as os from 'os'
+import * as path from 'path'
+
+import * as semver from 'semver'
+
+// Translations between actions input and Julia arch names
+const osMap = {
+    'win32': 'winnt',
+    'darwin': 'mac',
+    'linux': 'linux'
+}
+const archMap = {
+    'x86': 'i686',
+    'x64': 'x86_64'
+}
+
+// Store information about the environment
+const osPlat = os.platform() // possible values: win32 (Windows), linux (Linux), darwin (macOS)
+core.debug(`platform: ${osPlat}`)
+
+/**
+ * @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)
+
+    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> {
+    const versionsFile = await tc.downloadTool('https://julialang-s3.julialang.org/bin/versions.json')
+
+    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): string {
+    if (semver.valid(versionInput) == versionInput || versionInput.endsWith('nightly')) {
+        // versionInput is a valid version or a nightly version, use it directly
+        return versionInput
+    }
+
+    // Use the highest available version that matches versionInput
+    let version = semver.maxSatisfying(availableReleases, versionInput)
+    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
+}
+
+function getNightlyFileName(arch: string): string {
+    let versionExt: string, ext: string
+
+    if (osPlat == 'win32') {
+        versionExt = arch == 'x64' ? '-win64' : '-win32'
+        ext = 'exe'
+    } else if (osPlat == 'darwin') {
+        if (arch == 'x86') {
+            throw new Error('32-bit Julia is not available on macOS')
+        }
+        versionExt = '-mac64'
+        ext = 'dmg'
+    } else if (osPlat === 'linux') {
+        versionExt = arch == 'x64' ? '-linux64' : '-linux32'
+        ext = 'tar.gz'
+    } else {
+        throw new Error(`Platform ${osPlat} is not supported`)
+    }
+
+    return `julia-latest${versionExt}.${ext}`
+}
+
+export function getFileInfo(versionInfo, version: string, arch: string) {
+    if (version.endsWith('nightly')) {
+        return null
+    }
+
+    for (let file of versionInfo[version].files) {
+        if (file.os == osMap[osPlat] && file.arch == archMap[arch]) {
+            return file
+        }
+    }
+
+    throw `Could not find ${archMap[arch]}/${version} binaries`
+}
+
+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)}`
+    }
+
+    return fileInfo.url
+}
+
+export async function installJulia(versionInfo, version: string, arch: string): Promise<string> {
+    // Download Julia
+    const fileInfo = getFileInfo(versionInfo, version, arch)
+    const downloadURL = getDownloadURL(fileInfo, version, arch)
+    core.debug(`downloading Julia from ${downloadURL}`)
+    const juliaDownloadPath = await tc.downloadTool(downloadURL)
+
+    // 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: ${checkSum}`)
+    } else {
+        core.debug('Skipping checksum check for nightly binaries.')
+    }
+
+    const tempInstallDir = fs.mkdtempSync(`julia-${arch}-${version}-`)
+
+    // Install it
+    switch (osPlat) {
+        case 'linux':
+            // tc.extractTar doesn't support stripping components, so we have to call tar manually
+            await exec.exec('tar', ['xf', juliaDownloadPath, '--strip-components=1', '-C', tempInstallDir])
+            return tempInstallDir
+        case 'win32':
+            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(), tempInstallDir)}" -NoNewWindow -Wait`])
+            } else {
+                await exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/S /D=${path.join(process.cwd(), tempInstallDir)}" -NoNewWindow -Wait`])
+            }
+            return tempInstallDir
+        case 'darwin':
+            await exec.exec('hdiutil', ['attach', juliaDownloadPath])
+            await exec.exec('/bin/bash', ['-c', `cp -a /Volumes/Julia-*/Julia-*.app/Contents/Resources/julia ${tempInstallDir}`])
+            return path.join(tempInstallDir, 'julia')
+        default:
+            throw new Error(`Platform ${osPlat} is not supported`)
+    }
+}

src/setup-julia.ts

@@ -2,109 +2,87 @@ import * as core from '@actions/core'
 import * as exec from '@actions/exec'
 import * as tc from '@actions/tool-cache'
 
-import * as os from 'os'
+import * as fs from 'fs'
+import * as https from 'https'
 import * as path from 'path'
 
-// Store information about the environment
-const osPlat = os.platform() // possible values: win32 (Windows), linux (Linux), darwin (macOS)
-core.debug(`platform: ${osPlat}`)
-
-function getMajorMinorVersion(version: string): string {
-    return version.split('.').slice(0, 2).join('.')
-}
-
-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'
-    } else {
-        throw `Platform ${osPlat} is not supported`
-    }
-
-    return `${baseURL}/${platform}/${arch}/${versionDir}/${getFileName(version, arch)}`
-}
-
-function getFileName(version: string, arch: string): string {
-    let versionExt: string, ext: string
-
-    if (osPlat === 'win32') { // Windows
-        versionExt = arch == 'x64' ? '-win64' : '-win32'
-        ext = 'exe'
-    } else if (osPlat === 'darwin') { // macOS
-        if (arch == 'x86') {
-            throw '32-bit Julia is not available on macOS'
-        }
-        versionExt = '-mac64'
-        ext = 'dmg'
-    } else if (osPlat === 'linux') { // Linux
-        versionExt = arch == 'x64' ? '-linux-x86_64' : '-linux-i686'
-        ext = 'tar.gz'
-    } else {
-        throw `Platform ${osPlat} is not supported`
-    }
-
-    return `julia-${version}${versionExt}.${ext}`
-}
-
-async function installJulia(version: string, arch: string): Promise<string> {
-    // Download Julia
-    const downloadURL = getDownloadURL(version, arch)
-    core.debug(`downloading Julia from ${downloadURL}`)
-    const juliaDownloadPath = await tc.downloadTool(downloadURL)
-
-    // Install it
-    switch (osPlat) {
-        case 'linux':
-            const juliaExtractedFolder = await tc.extractTar(juliaDownloadPath)
-            return path.join(juliaExtractedFolder, `julia-${version}`)
-        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
-        case 'darwin':
-            await exec.exec('hdiutil', ['attach', juliaDownloadPath])
-            return `/Volumes/Julia-${version}/Julia-${getMajorMinorVersion(version)}.app/Contents/Resources/julia`
-        default:
-            throw `Platform ${osPlat} is not supported`
-    }
-}
+import * as installer from './installer'
 
 async function run() {
     try {
-        const version = core.getInput('version')
+        // 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')
+
+        // 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 (!arch) {
+            throw new Error(`Arch input must not be null`)
+        }
+
+        const versionInfo = await installer.getJuliaVersionInfo()
+        const availableReleases = await installer.getJuliaVersions(versionInfo)
+        const version = installer.getJuliaVersion(availableReleases, versionInput)
         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 installJulia(version, arch);
+            core.debug(`could not find Julia ${arch}/${version} in cache`)
+            const juliaInstallationPath = await installer.installJulia(versionInfo, version, arch)
 
             // Add it to cache
             juliaPath = await tc.cacheDir(juliaInstallationPath, 'julia', version, arch)
             core.debug(`added Julia to cache: ${juliaPath}`)
+
+            // Remove temporary dir
+            fs.rmdirSync(juliaInstallationPath, {recursive: true})
         } 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
+        if (core.getInput('show-versioninfo') == 'true') {
+            // If enabled, show the full version info
+            // --compile=min -O0 reduces the time from ~1.8-1.9s to ~0.8-0.9s
+            exec.exec('julia', ['--compile=min', '-O0', '-e', 'using InteractiveUtils; versioninfo()'])
+        } else {
+            // Otherwise only print julia --version to save time
+            exec.exec('julia', ['--version'])
+        }
     } catch (error) {
         core.setFailed(error.message)
     }