Add production dependencies & build

* Only show versioninfo() in debug mode

* Add input to specify if versioninfo() is displayed

* No access to secrets

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

@@ -0,0 +1,36 @@
+name: Example builds (nightly)
+
+on:
+  push:
+  pull_request:
+  schedule:
+    - cron: '0 3 * * *'
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        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 --production
+
+      - name: Debug information
+        run: curl https://ipinfo.io/ip
+
+      - name: "Set up Julia (nightly)"
+        uses: ./
+        with:
+          version: nightly
+          arch: ${{ matrix.julia-arch }}
+      - run: julia --version

.github/workflows/example-builds.yml

@@ -0,0 +1,33 @@
+name: Example builds
+
+on: [push, pull_request]
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        julia-version: ['1.0.5', '1', '^1.4.0-rc1']
+        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 --production
+
+      - name: Debug information
+        run: curl https://ipinfo.io/ip
+
+      - name: "Set up Julia"
+        uses: ./
+        with:
+          version: ${{ matrix.julia-version }}
+          arch: ${{ matrix.julia-arch }}
+      - run: julia --version

README.md

@@ -11,7 +11,6 @@ This action sets up a Julia environment for use in actions by downloading a spec
   - [Julia Versions](#julia-versions)
   - [Matrix Testing](#matrix-testing)
 - [Versioning](#versioning)
-- [Future plans & ideas](#future-plans--ideas)
 - [Licence info](#licence-info)
 
 ## Usage
@@ -25,7 +24,7 @@ You can find a list of example workflows making use of this action here: [julia-
 ```yaml
 steps:
 - uses: actions/checkout@v1.0.0
-- uses: julia-actions/setup-julia@v0.2
+- uses: julia-actions/setup-julia@v1
   with:
     version: 1.0.4
 - run: julia -e 'println("Hello, World!")'
@@ -42,6 +41,7 @@ You can either specify specific Julia versions or version ranges. If you specify
 - `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`.
+- `nightly` will install the latest nightly build.
 
 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.
 
@@ -51,6 +51,8 @@ Currently the list of available versions is hardcoded. You have to use the lates
 
 ### 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
@@ -65,10 +67,11 @@ jobs:
     steps:
       - uses: actions/checkout@v1.0.0
       - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.2
+        uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
       - run: julia -e 'println("Hello, World!")'
+        shell: bash
 ```
 
 #### 32-bit Julia
@@ -90,11 +93,12 @@ jobs:
     steps:
       - uses: actions/checkout@v1.0.0
       - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.2
+        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:
@@ -116,10 +120,11 @@ jobs:
     steps:
       - uses: actions/checkout@v1.0.0
       - name: "Set up Julia"
-        uses: julia-actions/setup-julia@v0.2
+        uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.julia-version }}
       - run: julia -e 'println("Hello, World!")'
+        shell: bash
 ```
 
 ## Versioning
@@ -141,14 +146,5 @@ steps:
   - uses: julia-actions/setup-julia@v0.1.0  # specific version tag
 ```
 
-## Future plans & ideas
-
-In no particular order:
-
-* 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.
-
 ## 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.

__tests__/main.test.ts

@@ -1,5 +1,7 @@
 import * as installer from '../src/installer'
 
+import * as semver from 'semver'
+
 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', () => {
@@ -14,6 +16,10 @@ describe('installer tests', () => {
                 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')
             })
+            it('Doesn\'t change the version when given `nightly`', async () => {
+                expect(await installer.getJuliaVersion([], 'nightly')).toEqual('nightly')
+                expect(await installer.getJuliaVersion(testVersions, 'nightly')).toEqual('nightly')
+            })
         })
         describe('version ranges', () => {
             it('Chooses the highest available version that matches the input', async () => {
@@ -24,4 +30,14 @@ describe('installer tests', () => {
             })
         })
     })
+    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()
+            })
+        })
+    })
 })

action.yml

@@ -9,6 +9,10 @@ inputs:
     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'
 runs:
   using: 'node12'
   main: 'lib/setup-julia.js'

bin/build-test-release

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+branch_name="$(git symbolic-ref --short -q HEAD)"
+
+git checkout -B test/"$branch_name"
+
+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"

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

@@ -25,13 +25,17 @@ const semver = __importStar(require("semver"));
 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'];
+exports.juliaVersions = ['v1.4.0-rc1', 'v1.3.1', 'v1.3.0', '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) {
     return __awaiter(this, void 0, void 0, function* () {
         if (semver.valid(versionInput) == versionInput) {
             // versionInput is a valid version, use it directly
             return versionInput;
         }
+        // nightlies
+        if (versionInput == 'nightly') {
+            return 'nightly';
+        }
         // Use the highest available version that matches versionInput
         let version = semver.maxSatisfying(availableReleases, versionInput);
         if (version == null) {
@@ -47,9 +51,7 @@ 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';
     }
@@ -65,6 +67,14 @@ function getDownloadURL(version, arch) {
     else {
         throw `Platform ${osPlat} is not supported`;
     }
+    // nightlies
+    if (version == 'nightly') {
+        const baseURL = 'https://julialangnightlies-s3.julialang.org/bin';
+        return `${baseURL}/${platform}/${arch}/${getFileName('latest', arch)}`;
+    }
+    // normal versions
+    const baseURL = 'https://julialang-s3.julialang.org/bin';
+    const versionDir = getMajorMinorVersion(version);
     return `${baseURL}/${platform}/${arch}/${versionDir}/${getFileName(version, arch)}`;
 }
 function getFileName(version, arch) {
@@ -81,7 +91,12 @@ function getFileName(version, arch) {
         ext = 'dmg';
     }
     else if (osPlat === 'linux') { // Linux
-        versionExt = arch == 'x64' ? '-linux-x86_64' : '-linux-i686';
+        if (version == 'latest') { // nightly version
+            versionExt = arch == 'x64' ? '-linux64' : '-linux32';
+        }
+        else {
+            versionExt = arch == 'x64' ? '-linux-x86_64' : '-linux-i686';
+        }
         ext = 'tar.gz';
     }
     else {
@@ -98,15 +113,25 @@ function installJulia(version, arch) {
         // Install it
         switch (osPlat) {
             case 'linux':
-                const juliaExtractedFolder = yield tc.extractTar(juliaDownloadPath);
+                // tc.extractTar doesn't support stripping components, so we have to call tar manually
-                return path.join(juliaExtractedFolder, `julia-${version}`);
+                yield exec.exec('mkdir', [`${process.env.HOME}/julia`]);
+                yield exec.exec('tar', ['xf', juliaDownloadPath, '--strip-components=1', '-C', `${process.env.HOME}/julia`]);
+                return `${process.env.HOME}/julia`;
             case 'win32':
                 const juliaInstallationPath = path.join('C:', 'Julia');
-                yield exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/S /D=${juliaInstallationPath}" -NoNewWindow -Wait`]);
+                if (version == '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 ${juliaDownloadPath} -ArgumentList "/SILENT /dir=${juliaInstallationPath}" -NoNewWindow -Wait`]);
+                }
+                else {
+                    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`;
+                yield exec.exec('mkdir', [`${process.env.HOME}/julia`]);
+                yield exec.exec('/bin/bash', ['-c', `cp -a /Volumes/Julia-*/Julia-*.app/Contents/Resources/julia ${process.env.HOME}`]);
+                return `${process.env.HOME}/julia`;
             default:
                 throw `Platform ${osPlat} is not supported`;
         }

lib/setup-julia.js

@@ -43,8 +43,12 @@ function run() {
             }
             // Add it to PATH
             core.addPath(path.join(juliaPath, 'bin'));
-            // Test if Julia has been installed by showing versioninfo()
+            // Test if Julia has been installed
-            yield exec.exec('julia', ['-e', 'using InteractiveUtils; versioninfo()']);
+            exec.exec('julia', ['--version']);
+            // If enabled, also show the full version info
+            if (core.getInput('show-versioninfo') == 'true') {
+                exec.exec('julia', ['-e', 'using InteractiveUtils; versioninfo()']);
+            }
         }
         catch (error) {
             core.setFailed(error.message);

src/installer.ts

@@ -13,7 +13,7 @@ const osPlat = os.platform() // possible values: win32 (Windows), linux (Linux),
 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']
+export const juliaVersions = ['v1.4.0-rc1', 'v1.3.1', 'v1.3.0', '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']
 
 export async function getJuliaVersion(availableReleases: string[], versionInput: string): Promise<string> {
     if (semver.valid(versionInput) == versionInput) {
@@ -21,6 +21,11 @@ export async function getJuliaVersion(availableReleases: string[], versionInput:
         return versionInput
     }
 
+    // nightlies
+    if (versionInput == 'nightly') {
+        return 'nightly'
+    }
+
     // Use the highest available version that matches versionInput
     let version = semver.maxSatisfying(availableReleases, versionInput)
     if (version == null) {
@@ -38,9 +43,7 @@ function getMajorMinorVersion(version: string): 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'
@@ -55,6 +58,16 @@ function getDownloadURL(version: string, arch: string): string {
         throw `Platform ${osPlat} is not supported`
     }
 
+    // nightlies
+    if (version == 'nightly') {
+        const baseURL = 'https://julialangnightlies-s3.julialang.org/bin'
+        return `${baseURL}/${platform}/${arch}/${getFileName('latest', arch)}`
+    }
+
+    // normal versions
+    const baseURL = 'https://julialang-s3.julialang.org/bin'
+    const versionDir = getMajorMinorVersion(version)
+
     return `${baseURL}/${platform}/${arch}/${versionDir}/${getFileName(version, arch)}`
 }
 
@@ -71,7 +84,11 @@ function getFileName(version: string, arch: string): string {
         versionExt = '-mac64'
         ext = 'dmg'
     } else if (osPlat === 'linux') { // Linux
-        versionExt = arch == 'x64' ? '-linux-x86_64' : '-linux-i686'
+        if (version == 'latest') { // nightly version
+            versionExt = arch == 'x64' ? '-linux64' : '-linux32'
+        } else {
+            versionExt = arch == 'x64' ? '-linux-x86_64' : '-linux-i686'
+        }
         ext = 'tar.gz'
     } else {
         throw `Platform ${osPlat} is not supported`
@@ -89,15 +106,24 @@ export async function installJulia(version: string, arch: string): Promise<strin
     // Install it
     switch (osPlat) {
         case 'linux':
-            const juliaExtractedFolder = await tc.extractTar(juliaDownloadPath)
+            // tc.extractTar doesn't support stripping components, so we have to call tar manually
-            return path.join(juliaExtractedFolder, `julia-${version}`)
+            await exec.exec('mkdir', [`${process.env.HOME}/julia`])
+            await exec.exec('tar', ['xf', juliaDownloadPath, '--strip-components=1', '-C', `${process.env.HOME}/julia`])
+            return `${process.env.HOME}/julia`
         case 'win32':
             const juliaInstallationPath = path.join('C:', 'Julia')
-            await exec.exec('powershell', ['-Command', `Start-Process -FilePath ${juliaDownloadPath} -ArgumentList "/S /D=${juliaInstallationPath}" -NoNewWindow -Wait`])
+            if (version == '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 ${juliaDownloadPath} -ArgumentList "/SILENT /dir=${juliaInstallationPath}" -NoNewWindow -Wait`])
+            } else {
+                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`
+            await exec.exec('mkdir', [`${process.env.HOME}/julia`])
+            await exec.exec('/bin/bash', ['-c', `cp -a /Volumes/Julia-*/Julia-*.app/Contents/Resources/julia ${process.env.HOME}`])
+            return `${process.env.HOME}/julia`
         default:
             throw `Platform ${osPlat} is not supported`
     }

src/setup-julia.ts

@@ -32,8 +32,13 @@ async function run() {
         // Add it to PATH
         core.addPath(path.join(juliaPath, 'bin'))
         
-        // Test if Julia has been installed by showing versioninfo()
+        // Test if Julia has been installed
-        await exec.exec('julia', ['-e', 'using InteractiveUtils; versioninfo()'])
+        exec.exec('julia', ['--version'])
+
+        // If enabled, also show the full version info
+        if (core.getInput('show-versioninfo') == 'true') {
+            exec.exec('julia', ['-e', 'using InteractiveUtils; versioninfo()'])
+        }
     } catch (error) {
         core.setFailed(error.message)
     }