Output $PV at build stage

.github/workflows/build-test.yml

@@ -11,13 +11,19 @@ on:
         required: false
         type: string
         default: cygport
+    outputs:
+      pv:
+        description: The $PV value from the cygport file
+        value: ${{ jobs.build-test.outputs.pv }}
 
 jobs:
   build-test:
     name: Build and test
     runs-on: windows-latest
     env:
       CYGPORT_FILE: ${{ inputs.cygport_file }}
+    outputs:
+      pv: ${{ steps.data.outputs.pv }}
     steps:
 
       - name: Configure Git for Windows' core.autocrlf
@@ -69,15 +75,17 @@ jobs:
           add-to-path: false
 
       - name: Load data from cygport file
+        id: data
         shell: C:\cygwin\bin\bash.exe --noprofile --norc -e -o pipefail -o igncr {0}
         env:
           PATH: C:\cygwin\bin
         run: |
-          eval "$(cygport "$CYGPORT_FILE" vars NAME PF ARCH BUILD_REQUIRES)"
+          eval "$(cygport "$CYGPORT_FILE" vars NAME PF PV ARCH BUILD_REQUIRES)"
           printf 'CYGPORT_NAME=%s\n' "$NAME" | tee -a "$GITHUB_ENV"
           printf 'CYGPORT_PF=%s\n' "$PF" | tee -a "$GITHUB_ENV"
           printf 'CYGPORT_ARCH=%s\n' "$ARCH" | tee -a "$GITHUB_ENV"
           printf 'CYGPORT_BUILD_REQUIRES=%s\n' "$BUILD_REQUIRES" | tee -a "$GITHUB_ENV"
+          printf 'pv=%s\n' "$PV" | tee -a "$GITHUB_OUTPUT"
 
       - name: Install Cygwin build requirements
         uses: cygwin/cygwin-install-action@db475590d56881c6cef7b3f96f6f3dd9532ea1f4