Seperates out the library image building into a new, minimal workflow

.github/workflows/ci.yml

@@ -57,6 +57,12 @@ jobs:
     name: Prepare Docker Pipeline Data
     if: github.event_name == 'push' && (startsWith(github.ref, 'refs/heads/feature-') || github.ref == 'refs/heads/dev' || github.ref == 'refs/heads/beta' || contains(github.ref, 'beta.rc') || startsWith(github.ref, 'refs/tags/v'))
     runs-on: ubuntu-20.04
+    # If the push triggered the installer library workflow, wait for it to
+    # complete here.  This ensures the required versions for the final
+    # image have been built, while not waiting at all if the versions haven't changed
+    concurrency:
+      group: build-installer-library
+      cancel-in-progress: false
     needs:
       - documentation
       - ci-backend
@@ -117,55 +123,6 @@ jobs:
 
       jbig2enc-json: ${{ steps.jbig2enc-setup.outputs.jbig2enc-json}}
 
-  build-qpdf-debs:
-    name: qpdf
-    needs:
-      - prepare-docker-build
-    uses: ./.github/workflows/reusable-workflow-builder.yml
-    with:
-      dockerfile: ./docker-builders/Dockerfile.qpdf
-      build-json: ${{ needs.prepare-docker-build.outputs.qpdf-json }}
-      build-args: |
-        QPDF_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.qpdf-json).version }}
-
-  build-jbig2enc:
-    name: jbig2enc
-    needs:
-      - prepare-docker-build
-    uses: ./.github/workflows/reusable-workflow-builder.yml
-    with:
-      dockerfile: ./docker-builders/Dockerfile.jbig2enc
-      build-json: ${{ needs.prepare-docker-build.outputs.jbig2enc-json }}
-      build-args: |
-        JBIG2ENC_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.jbig2enc-json).version }}
-
-  build-psycopg2-wheel:
-    name: psycopg2
-    needs:
-      - prepare-docker-build
-    uses: ./.github/workflows/reusable-workflow-builder.yml
-    with:
-      dockerfile: ./docker-builders/Dockerfile.psycopg2
-      build-json: ${{ needs.prepare-docker-build.outputs.psycopg2-json }}
-      build-args: |
-        PSYCOPG2_GIT_TAG=${{ fromJSON(needs.prepare-docker-build.outputs.psycopg2-json).git_tag }}
-        PSYCOPG2_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.psycopg2-json).version }}
-
-  build-pikepdf-wheel:
-    name: pikepdf
-    needs:
-      - prepare-docker-build
-      - build-qpdf-debs
-    uses: ./.github/workflows/reusable-workflow-builder.yml
-    with:
-      dockerfile: ./docker-builders/Dockerfile.pikepdf
-      build-json: ${{ needs.prepare-docker-build.outputs.pikepdf-json }}
-      build-args: |
-        REPO=${{ github.repository }}
-        QPDF_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.qpdf-json).version }}
-        PIKEPDF_GIT_TAG=${{ fromJSON(needs.prepare-docker-build.outputs.pikepdf-json).git_tag }}
-        PIKEPDF_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.pikepdf-json).version }}
-
   # build and push image to docker hub.
   build-docker-image:
     runs-on: ubuntu-20.04
@@ -174,10 +131,6 @@ jobs:
       cancel-in-progress: true
     needs:
       - prepare-docker-build
-      - build-psycopg2-wheel
-      - build-jbig2enc
-      - build-qpdf-debs
-      - build-pikepdf-wheel
     steps:
       -
         name: Check pushing to Docker Hub

.github/workflows/installer-library.yml

@@ -0,0 +1,139 @@
+# This workflow will run to update the installer library of
+# Docker images.  These are the images which provide updated wheels
+# .deb installation packages or maybe just some compiled library
+
+name: Build Image Library
+
+on:
+  push:
+    # Must match one of these branches AND one of the paths
+    # to be triggered
+    branches:
+      - "main"
+      - "dev"
+      - "library-*"
+      - "feature-*"
+    paths:
+      # Trigger the workflow if a Dockerfile changed
+      - "docker-builders/**"
+      # Trigger if a package was updated
+      - ".build-config.json"
+      - "Pipfile.lock"
+      # Also trigger on workflow changes (such as this file)
+      - ".github/workflows/**"
+
+# Set a workflow level concurrency group so primary workflow
+# can wait for this to complete if needed
+# DO NOT CHANGE without updating main workflow group
+concurrency:
+  group: build-installer-library
+  cancel-in-progress: false
+
+jobs:
+  prepare-docker-build:
+    name: Prepare Docker Image Version Data
+    runs-on: ubuntu-20.04
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v3
+      -
+        name: Set up Python
+        uses: actions/setup-python@v3
+        with:
+          python-version: "3.9"
+      -
+        name: Setup qpdf image
+        id: qpdf-setup
+        run: |
+          build_json=$(python ${GITHUB_WORKSPACE}/.github/scripts/get-build-json.py qpdf)
+
+          echo ${build_json}
+
+          echo ::set-output name=qpdf-json::${build_json}
+      -
+        name: Setup psycopg2 image
+        id: psycopg2-setup
+        run: |
+          build_json=$(python ${GITHUB_WORKSPACE}/.github/scripts/get-build-json.py psycopg2)
+
+          echo ${build_json}
+
+          echo ::set-output name=psycopg2-json::${build_json}
+      -
+        name: Setup pikepdf image
+        id: pikepdf-setup
+        run: |
+          build_json=$(python ${GITHUB_WORKSPACE}/.github/scripts/get-build-json.py pikepdf)
+
+          echo ${build_json}
+
+          echo ::set-output name=pikepdf-json::${build_json}
+      -
+        name: Setup jbig2enc image
+        id: jbig2enc-setup
+        run: |
+          build_json=$(python ${GITHUB_WORKSPACE}/.github/scripts/get-build-json.py jbig2enc)
+
+          echo ${build_json}
+
+          echo ::set-output name=jbig2enc-json::${build_json}
+
+    outputs:
+
+      qpdf-json: ${{ steps.qpdf-setup.outputs.qpdf-json }}
+
+      pikepdf-json: ${{ steps.pikepdf-setup.outputs.pikepdf-json }}
+
+      psycopg2-json: ${{ steps.psycopg2-setup.outputs.psycopg2-json }}
+
+      jbig2enc-json: ${{ steps.jbig2enc-setup.outputs.jbig2enc-json}}
+
+  build-qpdf-debs:
+    name: qpdf
+    needs:
+      - prepare-docker-build
+    uses: ./.github/workflows/reusable-workflow-builder.yml
+    with:
+      dockerfile: ./docker-builders/Dockerfile.qpdf
+      build-json: ${{ needs.prepare-docker-build.outputs.qpdf-json }}
+      build-args: |
+        QPDF_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.qpdf-json).version }}
+
+  build-jbig2enc:
+    name: jbig2enc
+    needs:
+      - prepare-docker-build
+    uses: ./.github/workflows/reusable-workflow-builder.yml
+    with:
+      dockerfile: ./docker-builders/Dockerfile.jbig2enc
+      build-json: ${{ needs.prepare-docker-build.outputs.jbig2enc-json }}
+      build-args: |
+        JBIG2ENC_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.jbig2enc-json).version }}
+
+  build-psycopg2-wheel:
+    name: psycopg2
+    needs:
+      - prepare-docker-build
+    uses: ./.github/workflows/reusable-workflow-builder.yml
+    with:
+      dockerfile: ./docker-builders/Dockerfile.psycopg2
+      build-json: ${{ needs.prepare-docker-build.outputs.psycopg2-json }}
+      build-args: |
+        PSYCOPG2_GIT_TAG=${{ fromJSON(needs.prepare-docker-build.outputs.psycopg2-json).git_tag }}
+        PSYCOPG2_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.psycopg2-json).version }}
+
+  build-pikepdf-wheel:
+    name: pikepdf
+    needs:
+      - prepare-docker-build
+      - build-qpdf-debs
+    uses: ./.github/workflows/reusable-workflow-builder.yml
+    with:
+      dockerfile: ./docker-builders/Dockerfile.pikepdf
+      build-json: ${{ needs.prepare-docker-build.outputs.pikepdf-json }}
+      build-args: |
+        REPO=${{ github.repository }}
+        QPDF_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.qpdf-json).version }}
+        PIKEPDF_GIT_TAG=${{ fromJSON(needs.prepare-docker-build.outputs.pikepdf-json).git_tag }}
+        PIKEPDF_VERSION=${{ fromJSON(needs.prepare-docker-build.outputs.pikepdf-json).version }}