ci: Add GitHub Actions test workflow

This will eventually replace CircleCI.

.github/actions/build/action.yaml

@@ -0,0 +1,54 @@
+name: 'Build'
+description: 'Builds bat-extras'
+inputs:
+  manuals:
+    description: 'Builds manuals'
+    required: false
+    default: true
+  inline:
+    description: 'Inlines executable names in script'
+    required: false
+    default: true
+  verify:
+    description: 'Verifies after building'
+    required: false
+    default: false
+  minify:
+    description: 'Minification mode (none, all, lib)'
+    required: false
+    default: 'none'
+
+runs:
+  using: composite
+  steps:
+  
+    - name: Run build script
+      shell: bash
+      run: |
+        args=(
+          --banner
+          --minify="${{ inputs.minify }}"
+        )
+
+        if "${{ inputs.manuals }}"; then
+          args+=(--manuals)
+        else
+          args+=(--no-manuals)
+        fi
+
+        if "${{ inputs.verify }}"; then
+          args+=(--verify)
+        else
+          args+=(--no-verify)
+        fi
+
+        if "${{ inputs.inline }}"; then
+          args+=(--inline)
+        else
+          args+=(--no-inline)
+        fi
+
+        # Run the build script.
+        cd "${{ github.workspace }}"
+        PATH="${{ runner.temp }}/bin:${PATH}"
+        bash "${{ github.workspace }}/build.sh" "${args[@]}"

.github/actions/install-dependencies/action.yaml

@@ -0,0 +1,87 @@
+name: 'Install dependencies'
+description: 'Installs all the dependencies needed.'
+inputs:
+  build:
+    description: 'Install build dependencies.'
+    required: false
+    default: true
+  test:
+    description: 'Install test dependencies.'
+    required: true
+    default: false
+
+  version_bat:
+    description: 'The version of bat to install.'
+    required: false
+    default: "latest"
+
+  version_ripgrep:
+    description: 'The version of ripgrep to install.'
+    required: false
+    default: "latest"
+
+runs:
+  using: "composite"
+  steps:
+  
+    - name: Create directories
+      shell: bash
+      run: |
+        test -d "${RUNNER_TEMP}/bin" || mkdir -p "${RUNNER_TEMP}/bin"
+        test -d "${RUNNER_TEMP}/dl"  || mkdir -p "${RUNNER_TEMP}/dl"
+
+    - name:  Install shfmt (build dependency)
+      shell: bash
+      if:    ${{ env.ACT || inputs.build == 'true' }}
+      run: |
+        curl \
+          --silent \
+          --location \
+          --output "${RUNNER_TEMP}/bin/shfmt" \
+          "https://github.com/patrickvane/shfmt/releases/download/master/shfmt_linux_amd64"
+        chmod +x "${RUNNER_TEMP}/bin/shfmt"
+        
+    - name: Download bat (test dependency)
+      uses: dsaltares/fetch-gh-release-asset@1.0.0
+      if:   ${{ env.ACT || inputs.test == 'true' }}
+      with:
+        file: "bat-v[0-9\\.]+-x86_64-unknown-linux-gnu.tar.gz"
+        repo: "sharkdp/bat"
+        # version: "${{ inputs.version_bat || "latest" }}"
+        regex: true
+        target: ".dl/"
+
+    - name:  Install bat
+      shell: bash
+      if:    ${{ env.ACT || inputs.test == 'true' }}
+      run: |
+        tar -xf \
+          "${{ github.workspace }}/.dl"/bat-*.tar.* \
+          -C "${{ runner.temp }}/dl/"
+
+        find "${{ runner.temp }}/dl" \
+          -type f -iname "bat" \
+          -exec mv {} "${RUNNER_TEMP}/bin/" \;
+
+    - name: Download ripgrep (test dependency)
+      uses: dsaltares/fetch-gh-release-asset@1.0.0
+      if:   ${{ env.ACT || inputs.test == 'true' }}
+      with:
+        file: "ripgrep_[0-9\\.]+_amd64.deb"
+        repo: "BurntSushi/ripgrep"
+        # version: "${{ inputs.version_ripgrep || "latest" }}"
+        regex: true
+        target: ".dl/"
+
+    - name:  Install ripgrep
+      shell: bash
+      if:    ${{ env.ACT || inputs.test == 'true' }}
+      run: |
+        dpkg-deb -x \
+          "${{ github.workspace }}/.dl"/ripgrep_*.deb \
+          "${{ runner.temp }}/dl/"
+
+        find "${{ runner.temp }}/dl" \
+          -type f -iname "rg" \
+          -exec mv {} "${{ runner.temp }}/bin/" \;
+

.github/actions/test/action.yaml

@@ -0,0 +1,33 @@
+name: 'Test'
+description: 'Tests bat-extras'
+inputs:
+  strict:
+    description: 'Tests should be run under strict mode'
+    required: false
+    default:  false
+  compiled:
+    description: 'Test scripts that have been built'
+    required: false
+    default:  false
+
+runs:
+  using: composite
+  steps:
+  
+    - name: Run tests
+      shell: bash
+      run: |
+        args=()
+
+        if "${{ inputs.compiled }}"; then
+          args+=(--compiled)
+        fi
+
+        if "${{ inputs.strict }}"; then
+          args+=(--strict)
+        fi
+
+        cd "${{ github.workspace }}"
+        PATH="${{ runner.temp }}/bin:${PATH}"
+        bash "${{ github.workspace }}/test.sh" "${args[@]}" \
+          --verbose --snapshot:show

.github/workflows/test.yaml

@@ -0,0 +1,96 @@
+name: Test
+on:
+  push: {}
+  pull_request:
+    types: [opened, synchronize]
+
+jobs:
+  "Build":
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out sources
+        uses: actions/checkout@v3
+      - name: Install build dependencies
+        uses: ./.github/actions/install-dependencies
+        with:
+          build: true
+          test:  false
+      - name: Build artifacts
+        uses: ./.github/actions/build
+        with:
+          minify: lib
+          manuals: true
+          verify: false
+          inline: false
+      - name: Upload artifacts
+        uses: actions/upload-artifact@v3
+        if:   ${{ !env.ACT && !failure() }}
+        with:
+          path: |
+            ${{ github.workspace }}/bin/
+            ${{ github.workspace }}/doc/
+
+  "Test":
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out sources
+        uses: actions/checkout@v3
+      - name: Install test dependencies
+        uses: ./.github/actions/install-dependencies
+        with:
+          build: false
+          test:  true
+      - name: Test scripts
+        uses: ./.github/actions/test
+
+  "Test_Consistency":
+    runs-on: ubuntu-latest
+    needs: "Test"
+    steps:
+      - name: Check out sources
+        uses: actions/checkout@v3
+      - name: Install dependencies
+        uses: ./.github/actions/install-dependencies
+        with:
+          build: true
+          test:  true
+      - name: Build scripts
+        uses: ./.github/actions/build
+        with:
+          minify: lib
+          manuals: false
+          verify: false
+          inline: false
+      - name: Test built scripts
+        uses: ./.github/actions/test
+        with:
+          compiled: true
+
+  "Test_Symlinks":
+    runs-on: ubuntu-latest
+    needs: "Test"
+    env:
+      BAT_PAGER: 'cat'
+    steps:
+      - name: Check out sources
+        uses: actions/checkout@v3
+      - name: Install dependencies
+        uses: ./.github/actions/install-dependencies
+        with:
+          build: false
+          test:  true
+      - name: Prepare symlinks
+        run: |
+          chmod +x "${{ github.workspace }}/src/batgrep.sh"
+          ln -s "${{ github.workspace }}/src/batgrep.sh" "${{ runner.temp }}/absolute-batgrep"
+          (cd "${{ github.workspace }}" && ln -s "src/batgrep.sh" relative-batgrep)
+      - name: Test absolute symlink
+        run: |
+          PATH="${{ runner.temp }}/bin:${PATH}"
+          "${{ runner.temp }}/absolute-batgrep" 'a' <<< 'abc'
+      - name: Test relative symlink
+        run: |
+          PATH="${{ runner.temp }}/bin:${PATH}"
+          "${{ github.workspace }}/relative-batgrep" 'a' <<< 'abc'
+
+