Fix macOS CI after GH runners & Homebrew both changed for the worse (#150)

* Try some fixes for the macOS CI and add some debug lines

* Of course it'd be PHP that wants libpq... Because of COURSE it is!

* Silly committing person forgot postgresql@11 doesn't get brew linked automatically

* PostgreSQL formulae in Brew no longer run initdb if they detect CI (why). Also compensate for disjoint data directories.

* Since we reinstall postgres 12 after uninstall, have to manually wipe the old data dir...

* Runner won't let me rm -rf, let's see if it knows find -delete

* Okay let's try bash-ing it.

* Too syntactically weird for the workflow syntax, try more quoting...

* Bash pipelines. Sigh.

* Clean up after all the experiments, darn GH runners

Author: gwynne

.github/workflows/test.yml

@@ -7,15 +7,21 @@ jobs:
       fail-fast: false
       matrix:
         psql: ['postgresql@11', 'postgresql@12']
+        include:
+          # The PostgreSQL formulas don't use a consistent data dir
+          - psql: 'postgresql@11'
+            dbroot: '/usr/local/var/postgresql@11'
+          - psql: 'postgresql@12'
+            dbroot: '/usr/local/var/postgres'
     runs-on: macos-latest
     steps:
     - run: sudo xcode-select -s /Applications/Xcode_11.4.app/Contents/Developer
-    - run: brew unlink libpq
+    - run: brew uninstall --force libpq postgresql@11 postgresql@12 php
     - run: brew install ${{ matrix.psql }}
-      continue-on-error: true
-    - run: brew link -f --overwrite ${{ matrix.psql }}
-    - run: brew reinstall ${{ matrix.psql }}
-    - run: brew postinstall ${{ matrix.psql }}
+    - run: brew link --force ${{ matrix.psql }}
+    - run: bash -c '[[ -d "${{ matrix.dbroot }}" ]] && mv "${{ matrix.dbroot }}" /usr/local/var/.outta-the-way || true'
+    - run: mkdir -p /usr/local/var/log "${{ matrix.dbroot }}"
+    - run: initdb --locale=C -E UTF-8 "${{ matrix.dbroot }}"
     - run: brew services start ${{ matrix.psql }}
     - run: sleep 4 # give the server a chance to settle
     - run: createuser -d -l -s vapor_username