fix(ci): unify PKG_CONFIG_PATH setup on macOS

Move PKG_CONFIG_PATH composition into env.sh and source it in CI to ensure
consistent environment between local and CI builds. This avoids potential
mismatches and missing dependencies, especially for sqlite, and simplifies
maintenance.

Author: jiacai2050

.github/workflows/ci.yml

@@ -54,8 +54,8 @@ jobs:
         if: matrix.os == 'macos-latest'
         run: |
           node .github/ci.js
-          prefix=$(brew --prefix)
-          echo "PKG_CONFIG_PATH=${prefix}/opt/sqlite/lib/pkgconfig:${prefix}/opt/libpq/lib/pkgconfig:${prefix}/opt/mysql-client/lib/pkgconfig" >> ${GITHUB_ENV}
+          source env.sh
+          echo "PKG_CONFIG_PATH=${PKG_CONFIG_PATH}" >> ${GITHUB_ENV}
       - name: Run examples(Unix)
         run: |
           pkg-config --libs --cflags libpq mysqlclient

env.sh

@@ -19,4 +19,6 @@ if ! brew list mysql-client &>/dev/null; then
 fi
 
 PREFIX=$(brew --prefix)
-export PKG_CONFIG_PATH="${PREFIX}/opt/libpq/lib/pkgconfig:${PREFIX}/opt/mysql-client/lib/pkgconfig"
+# Note: sqlite is usually preinstalled on macOS, but brew version might be needed for headers.
+# We include it here to match the CI environment requirements.
+export PKG_CONFIG_PATH="${PREFIX}/opt/sqlite/lib/pkgconfig:${PREFIX}/opt/libpq/lib/pkgconfig:${PREFIX}/opt/mysql-client/lib/pkgconfig"