Added Mac to CI

.github/workflows/build.yml

@@ -3,22 +3,37 @@ on: [push, pull_request]
 jobs:
   build:
     if: "!contains(github.event.head_commit.message, '[skip ci]')"
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
       matrix:
+        os: [ubuntu-latest]
         postgres: [13, 12, 11, 10, 9.6]
+        include:
+        - os: macos-latest
+          postgres: 13
     steps:
     - uses: actions/checkout@v2
     - uses: ankane/setup-postgres@v1
       with:
         postgres-version: ${{ matrix.postgres }}
-    - run: sudo apt-get update && sudo apt-get install postgresql-server-dev-${{ matrix.postgres }} libipc-run-perl
+    - if: ${{ startsWith(matrix.os, 'ubuntu') }}
+      run: sudo apt-get update && sudo apt-get install postgresql-server-dev-${{ matrix.postgres }} libipc-run-perl
     - run: make
-    - run: |
+    - if: ${{ startsWith(matrix.os, 'ubuntu') }}
+      run: |
         export PG_CONFIG=`which pg_config`
         sudo --preserve-env=PG_CONFIG make install
+    - if: ${{ startsWith(matrix.os, 'macos') }}
+      run: make install
     - run: make installcheck
     - if: ${{ failure() }}
       run: cat regression.diffs
-    - run: make prove_installcheck
+    - if: ${{ startsWith(matrix.os, 'ubuntu') }}
+      run: make prove_installcheck
+    - if: ${{ startsWith(matrix.os, 'macos') }}
+      run: |
+        brew install cpanm && cpanm IPC::Run
+        wget -q https://github.com/postgres/postgres/archive/refs/tags/REL_13_2.tar.gz
+        tar xf REL_13_2.tar.gz
+        make prove_installcheck PROVE=prove PERL5LIB=postgres-REL_13_2/src/test/perl