Add CI

.github/workflows/ci.yml

@@ -0,0 +1,110 @@
+name: CI
+
+on:
+  push:
+    branches: [ master, main ]
+  pull_request:
+    branches: [ master, main ]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y \
+          autoconf \
+          automake \
+          build-essential \
+          perl \
+          patch \
+          diffutils \
+          xmlto \
+          libpcre2-dev
+
+    - name: Bootstrap
+      run: ./bootstrap
+
+    - name: Configure
+      run: |
+        ./configure \
+          --with-pcre2
+
+    - name: Build
+      run: make -j$(nproc)
+
+    - name: Run tests
+      run: make check
+
+    - name: Show test results on failure
+      if: failure()
+      run: |
+        echo "=== Test logs ==="
+        find . -name "*.log" -type f -exec echo "=== {} ===" \; -exec cat {} \;
+        echo "=== Test arena contents ==="
+        find test-arena -type f 2>/dev/null | head -20 | while read f; do
+          echo "=== $f ==="
+          cat "$f" 2>/dev/null || echo "Cannot read file"
+        done
+
+  test-without-pcre2:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies (without PCRE2)
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y \
+          autoconf \
+          automake \
+          build-essential \
+          perl \
+          patch \
+          diffutils \
+          xmlto
+
+    - name: Bootstrap
+      run: ./bootstrap
+
+    - name: Configure without PCRE2
+      run: ./configure --without-pcre2
+
+    - name: Build
+      run: make -j$(nproc)
+
+    - name: Run tests
+      run: make check
+
+  test-distcheck:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+
+    - name: Install dependencies
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y \
+          autoconf \
+          automake \
+          build-essential \
+          perl \
+          patch \
+          diffutils \
+          xmlto \
+          libpcre2-dev
+
+    - name: Bootstrap
+      run: ./bootstrap
+
+    - name: Configure
+      run: ./configure --with-pcre2
+
+    - name: Build and test distribution
+      run: make distcheck
+
+