Add prefix input (#24)

This allows inserting commands like xvfb-run in front of the Julia command

(fixes #3)

Co-authored-by: Isaac Good <github@isaacgood.com>

.github/workflows/ci.yml

@@ -0,0 +1,76 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - "main"
+      - "master"
+  pull_request:
+
+jobs:
+  test:
+    name: Julia ${{ matrix.version }} - ${{ matrix.os }} - ${{ matrix.arch }} - ${{ github.event_name }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        version:
+          - "1.0"
+          - "1" # automatically expands to the latest stable 1.x release of Julia
+          - nightly
+        os:
+          - ubuntu-latest
+          - macOS-latest
+          - windows-latest
+        arch:
+          - x64
+          - x86
+        # 32-bit Julia binaries are not available on macOS
+        exclude:
+          - os: macOS-latest
+            arch: x86
+
+    steps:
+      - name: Checkout Example.jl
+        uses: actions/checkout@v2
+        with:
+          repository: julia-actions/Example.jl
+
+      - name: Verify that test output file does not exist yet
+        run: test ! -f "$HOME/julia-runtest"
+        shell: bash
+
+      - name: Checkout julia-runtest
+        uses: actions/checkout@v2
+        with:
+          path: ./.github/actions/julia-runtest
+
+      - uses: julia-actions/setup-julia@v1
+        with:
+          version: ${{ matrix.version }}
+          arch: ${{ matrix.arch }}
+
+      - uses: actions/cache@v1
+        env:
+          cache-name: cache-artifacts
+        with:
+          path: ~/.julia/artifacts
+          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
+          restore-keys: |
+            ${{ runner.os }}-test-${{ env.cache-name }}-
+            ${{ runner.os }}-test-
+            ${{ runner.os }}-
+
+      - uses: julia-actions/julia-buildpkg@v1
+
+      - uses: ./.github/actions/julia-runtest
+
+      - uses: julia-actions/julia-processcoverage@v1
+
+      - uses: codecov/codecov-action@v1
+        with:
+          file: lcov.info
+
+      - name: Verify that test output file exists
+        run: test -f "$HOME/julia-runtest"
+        shell: bash

README.md

@@ -33,3 +33,36 @@ jobs:
       - uses: julia-actions/julia-buildpkg@latest
       - uses: julia-actions/julia-runtest@latest
 ```
+
+### Prefixing the Julia command
+
+In some packages, you may want to prefix the `julia` command with another command, e.g. for running tests of certain graphical libraries with `xvfb-run`.
+In that case, you can add an input called `prefix` containing the command that will be inserted to your workflow:
+
+```yaml
+      - uses: julia-actions/julia-runtest@v1
+        with:
+          prefix: xvfb-run
+```
+
+If you only want to add this prefix on certain builds, you can [include additional values into a combination](https://docs.github.com/en/free-pro-team@latest/actions/reference/workflow-syntax-for-github-actions#example-including-additional-values-into-combinations) of your build matrix, e.g.:
+
+```yaml
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, windows-latest, macOS-latest]
+        version: ['1.0', '1', 'nightly']
+        arch: [x64]
+        include:
+          - os: ubuntu-latest
+            prefix: xvfb-run
+    steps:
+    # ...
+      - uses: julia-actions/julia-runtest@v1
+        with:
+          prefix: ${{ matrix.prefix }}
+    # ...
+```
+
+This will add the prefix `xvfb-run` to all builds where the `os` is `ubuntu-latest`.

action.yml

@@ -16,6 +16,13 @@ inputs:
   depwarn:
     description: 'Value passed to the --depwarn flag. Options: yes | no | error. Default value: yes.'
     default: 'yes'
+  project:
+    description: 'Value passed to the --project flag. The default value is the repository root: "@."'
+    default: '@.'
+  prefix:
+    description: 'Value inserted in front of the julia command, e.g. for running xvfb-run julia [...]'
+    default: ''
+    required: false
 
 runs:
   using: 'composite'
@@ -36,5 +43,14 @@ runs:
         # the request metadata to pkg.julialang.org when installing
         # packages via `Pkg.test`.
         JULIA_PKG_SERVER: ""
-    - run: julia --color=yes --check-bounds=yes --inline=${{ inputs.inline }} --depwarn=${{ inputs.depwarn }} --project -e 'using Pkg; Pkg.test(coverage=${{ inputs.coverage }})'
+    - run: |
+        # The Julia command that will be executed
+        julia_cmd=( julia --color=yes --check-bounds=yes --inline=${{ inputs.inline }} --depwarn=${{ inputs.depwarn }} --project=${{ inputs.project }} -e 'using Pkg; Pkg.test(coverage=${{ inputs.coverage }})' )
+
+        # Add the prefix in front of the command if there is one
+        prefix="${{ inputs.prefix }}"
+        [[ -n $prefix ]] && julia_cmd=( "$prefix" "${julia_cmd[@]}" )
+
+        # Run the Julia command
+        "${julia_cmd[@]}"
       shell: bash