ci: refactor zig installation process

.github/bin/install-zig.sh

@@ -0,0 +1,32 @@
+#!/usr/bin/env bash
+
+case "$(uname)" in
+  Darwin*)   os='macos'   ;;
+  Linux*)    os='linux'   ;;
+  Windows*)  os='windows' ;;
+  MINGW*)    os='windows' ;;
+  MSYS_NT-*) os='windows' ;;
+  *)         os='linux'   ;;
+esac
+
+case "${os}" in
+  windows*) ext='zip'    ;;
+  *)        ext='tar.xz' ;;
+esac
+
+version='0.8.1'
+url="https://ziglang.org/download/${version}/zig-${os}-x86_64-${version}.${ext}"
+
+curlopts=(
+  --silent
+  --show-error
+  --fail
+  --location
+  --retry 3
+)
+
+file="zig.${ext}"
+curl "${curlopts[@]}" --output "${file}" "${url}"
+tar xJf "${file}"
+mkdir -p "${HOME}/bin"
+ln -s "$(pwd)"/zig-*/zig "${HOME}/bin/zig"

.github/workflows/tests.yml

@@ -7,32 +7,17 @@ on:
 
 jobs:
   test-exercises:
-    name: Check exercises
-    runs-on: ubuntu-latest
-    steps:
-    - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
+    strategy:
+      matrix:
+        os: [ubuntu-latest, macos-latest]
 
-    - name: Install Zig
-      run: |
-        curl -o zig.tar.xz https://ziglang.org/download/0.8.1/zig-linux-x86_64-0.8.1.tar.xz
-        tar xJf zig.tar.xz
-        mkdir -p $HOME/bin
-        ln -s $(pwd)/zig-*/zig $HOME/bin
-    
-    - name: Test exercises
-      run: ./_test/run-tests.sh
-  test-exercises-mac:
-    name: Check exercises on mac
-    runs-on: macos-latest
+    name: Check exercises (${{ matrix.os }})
+    runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@93ea575cb5d8a053eaa0ac8fa3b40d7e05a33cc8
 
     - name: Install Zig
-      run: |
-        curl -o zig.tar.xz https://ziglang.org/download/0.8.1/zig-macos-x86_64-0.8.1.tar.xz
-        tar xJf zig.tar.xz
-        mkdir -p $HOME/bin
-        ln -s $(pwd)/zig-*/zig $HOME/bin
-    
+      run: ./.github/bin/install-zig.sh
+
     - name: Test exercises
       run: ./_test/run-tests.sh