6 files changed, 133 insertions, 92 deletions
diff --git a/.github/actions/build-foo-cygwin/action.yml b/.github/actions/build-foo-cygwin/action.yml
new file mode 100644
index 0000000..e1ae57c
--- /dev/null
+++ b/.github/actions/build-foo-cygwin/action.yml
@@ -0,0 +1,20 @@
+name: Build foo.exe
+description: Build foo.exe (on Cygwin)
+inputs:
+  platform:
+    description: Target platform
+    required: true
+runs:
+  using: composite
+  steps:
+    - run: |
+        IFS= read -r src_dir <<'EOF'
+        ${{ github.workspace }}
+        EOF
+        echo "$src_dir"
+        src_dir="$( cygpath -ua "$src_dir" )"
+        cd -- "$src_dir"
+        arch=
+        [ '${{ matrix.platform }}' == 'x86' ] && arch=-m32
+        g++ $arch -std=c++14 -o foo foo.cpp
+      shell: C:\tools\cygwin\bin\bash.exe --login --norc -eo pipefail -o igncr '{0}'
diff --git a/.github/actions/build-foo/action.yml b/.github/actions/build-foo/action.yml
new file mode 100644
index 0000000..c1a6fdd
--- /dev/null
+++ b/.github/actions/build-foo/action.yml
@@ -0,0 +1,20 @@
+name: Build foo.exe
+description: Build foo.exe
+inputs:
+  platform:
+    description: Target platform
+    required: true
+runs:
+  using: composite
+  steps:
+    - run: |
+        $flags = @()
+        if ('${{ matrix.platform }}' -eq 'x86') {
+            $flags += '-m32'
+        }
+        $flags += '-std=c++14','-o','foo','foo.cpp'
+        if ('${{ runner.os }}' -eq 'Linux') {
+            $flags += '-lpthread'
+        }
+        g++ $flags
+      shell: pwsh
diff --git a/.github/actions/check-cc-cygwin/action.yml b/.github/actions/check-cc-cygwin/action.yml
new file mode 100644
index 0000000..b0926cc
--- /dev/null
+++ b/.github/actions/check-cc-cygwin/action.yml
@@ -0,0 +1,21 @@
+name: Check cc/c++
+description: Check cc/c++ (on Cygwin)
+runs:
+  using: composite
+  steps:
+    # Is this really the most stable piece of `gcc --version` output?
+    - run: |
+        check_tool() {
+            local exe
+            for exe; do
+                output="$( "$exe" --version )"
+                echo "$output"
+                if ! echo "$output" | grep -F -- "This is free software; see the source for copying conditions."; then
+                    echo 'Unexpected `'"$exe"' --version` output.' >&2
+                    exit 1
+                fi
+            done
+        }
+        check_tool cc
+        check_tool c++
+      shell: C:\tools\cygwin\bin\bash.exe --login --norc -eo pipefail -o igncr '{0}'
diff --git a/.github/actions/check-cc/action.yml b/.github/actions/check-cc/action.yml
new file mode 100644
index 0000000..d2b98ed
--- /dev/null
+++ b/.github/actions/check-cc/action.yml
@@ -0,0 +1,16 @@
+name: Check cc/c++
+description: Check cc/c++
+runs:
+  using: composite
+  steps:
+    # Is this really the most stable piece of `gcc --version` output?
+    - run: |
+        echo (Get-Command cc).Path
+        $cc = & cc --version
+        echo $cc
+        $($cc | Select-String -Pattern "This is free software; see the source for copying conditions." -SimpleMatch -Quiet) -or $(throw "Unexpected `cc --version` output")
+        echo (Get-Command c++).Path
+        $cxx = & c++ --version
+        echo $cxx
+        $($cxx | Select-String -Pattern "This is free software; see the source for copying conditions." -SimpleMatch -Quiet) -or $(throw "Unexpected `c++ --version` output")
+      shell: pwsh
diff --git a/.github/actions/run-foo/action.yml b/.github/actions/run-foo/action.yml
new file mode 100644
index 0000000..9e53df5
--- /dev/null
+++ b/.github/actions/run-foo/action.yml
@@ -0,0 +1,20 @@
+name: Run foo.exe
+description: Run foo.exe and verify its output
+runs:
+  using: composite
+  steps:
+    - run: |
+        $expected = @"
+        Doing something #1
+        Doing something #2
+        Doing something #3
+        "@
+
+        $actual = & (Join-Path . foo)
+        $actual = $actual -join [Environment]::NewLine
+
+        $($actual -eq $expected) -or $(throw @"
+        Unexpected output:
+        $actual
+        "@)
+      shell: pwsh
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index dcb1b46..5de83a8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -9,118 +9,62 @@ on:
   workflow_dispatch:
 
 jobs:
-  test:
+  ubuntu:
     strategy:
-      fail-fast: false
       matrix:
         platform: [x86, x64]
-        cygwin: [0, 1]
-        hardlinks: [0, 1]
-        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-latest, windows-latest]
-
-        include:
-          # Prettier run names.
-          - {os: ubuntu-18.04, name: Ubuntu 18.04}
-          - {os: ubuntu-20.04, name: Ubuntu 20.04}
-          - {os: ubuntu-latest, name: Ubuntu (latest)}
-          - {cygwin: 1, name: Cygwin}
-        exclude:
-          # No Cygwin on Ubuntu.
-          - {os: ubuntu-18.04, cygwin: 1}
-          - {os: ubuntu-20.04, cygwin: 1}
-          - {os: ubuntu-latest, cygwin: 1}
-          # This action is not suitable for Windows hosts, use setup-mingw for
-          # that.
-          - {os: windows-latest, cygwin: 0}
-          # Only test hardlinks on Cygwin.
-          - {cygwin: 0, hardlinks: 1}
-
+        os: [ubuntu-18.04, ubuntu-20.04, ubuntu-latest]
     runs-on: '${{ matrix.os }}'
-
-    name: '${{ matrix.name }} / ${{ matrix.platform }} / Hardlinks: ${{ matrix.hardlinks }}'
-
-    defaults:
-      run:
-        shell: pwsh
-
+    name: 'Test: ${{ matrix.os }} / ${{ matrix.platform }}'
     steps:
       - name: Checkout
         uses: actions/checkout@v2
+      - name: Set up GCC
+        uses: ./
+        with:
+          platform: '${{ matrix.platform }}'
+          cc: 1
+      - name: Build foo.exe
+        uses: ./.github/actions/build-foo
+      - name: Run foo.exe
+        uses: ./.github/actions/run-foo
+      - name: Check cc/c++
+        uses: ./.github/actions/check-cc
 
+  cygwin:
+    strategy:
+      matrix:
+        platform: [x86, x64]
+        hardlinks: [0, 1]
+    runs-on: windows-latest
+    name: 'Cygwin: ${{ matrix.platform }} / hardlinks${{ matrix.hardlinks }}'
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
       - name: Clean up PATH
         uses: egor-tensin/cleanup-path@v1
-        if: runner.os == 'Windows'
-
       - name: Install Cygwin
         uses: egor-tensin/setup-cygwin@v3
         with:
           platform: '${{ matrix.platform }}'
-        if: matrix.cygwin
-
       - name: Set up GCC
         uses: ./
         with:
           platform: '${{ matrix.platform }}'
-          cygwin: '${{ matrix.cygwin }}'
+          cygwin: 1
           cc: 1
           hardlinks: '${{ matrix.hardlinks }}'
-
       - name: Build foo.exe
-        run: |
-          $flags = @()
-          if ('${{ matrix.platform }}' -eq 'x86') {
-              $flags += '-m32'
-          }
-          $flags += '-std=c++14','-o','foo','foo.cpp'
-          if ('${{ runner.os }}' -eq 'Linux') {
-              $flags += '-lpthread'
-          }
-          g++ $flags
-        if: '!matrix.cygwin || matrix.hardlinks'
-
-      - name: Build foo.exe on Cygwin
-        run: |
-          $cwd = cygpath.exe -ua (Get-Location)
-          $arch = if ('${{ matrix.platform }}' -eq 'x64') { '-m64' } else { '-m32' }
-          $cmd = printf.exe -- 'cd %q && g++ %q -std=c++14 -o foo foo.cpp' $cwd $arch
-          bash.exe --login -o errexit -c $cmd
-        if: matrix.cygwin && !matrix.hardlinks
-
+        uses: ./.github/actions/build-foo
+        if: matrix.hardlinks
+      - name: Build foo.exe
+        uses: ./.github/actions/build-foo-cygwin
+        if: '!matrix.hardlinks'
       - name: Run foo.exe
-        run: |
-          $expected = @"
-          Doing something #1
-          Doing something #2
-          Doing something #3
-          "@
-
-          $actual = & (Join-Path . foo)
-          $actual = $actual -join [Environment]::NewLine
-
-          $($actual -eq $expected) -or $(throw @"
-          Unexpected output:
-          $actual
-          "@)
-
-      # Is this really the most stable piece of `gcc --version` output?
+        uses: ./.github/actions/run-foo
       - name: Check cc/c++
-        run: |
-          echo (Get-Command cc).Path
-          $cc = & cc --version
-          echo $cc
-          $($cc | Select-String -Pattern "This is free software; see the source for copying conditions." -SimpleMatch -Quiet) -or $(throw "Unexpected `cc --version` output")
-          echo (Get-Command c++).Path
-          $cxx = & c++ --version
-          echo $cxx
-          $($cxx | Select-String -Pattern "This is free software; see the source for copying conditions." -SimpleMatch -Quiet) -or $(throw "Unexpected `c++ --version` output")
-        if: '!matrix.cygwin || matrix.hardlinks'
-
-      - name: Check cc/c++ on Cygwin
-        run: |
-          $cc = bash.exe --login -o errexit -c 'cc --version'
-          echo $cc
-          $($cc | Select-String -Pattern "This is free software; see the source for copying conditions." -SimpleMatch -Quiet) -or $(throw "Unexpected `cc --version` output")
-          $cxx = bash.exe --login -o errexit -c 'c++ --version'
-          echo $cxx
-          $($cxx | Select-String -Pattern "This is free software; see the source for copying conditions." -SimpleMatch -Quiet) -or $(throw "Unexpected `c++ --version` output")
-        if: matrix.cygwin && !matrix.hardlinks
+        uses: ./.github/actions/check-cc
+        if: matrix.hardlinks
+      - name: Check cc/c++
+        uses: ./.github/actions/check-cc-cygwin
+        if: '!matrix.hardlinks'