Merge pull request #76 from OctoPrint/add-workflow-filtering-rules

Add workflow filtering rules

Author: LongLiveCHIEF

.github/filters.yml

@@ -0,0 +1,5 @@
+main_image_files:
+  - 'Dockerfile'
+  - 'root/**'
+minimal_image_files:
+  - 'minimal/**'

.github/workflows/build.yml

@@ -9,8 +9,22 @@ on:
       - master
 
 jobs:
+  filters:
+    runs-on: ubuntu-latest
+    outputs:
+      found_main_changes: ${{ steps.filter.outputs.main_image_files }}
+      found_minimal_changes: ${{ steps.filter.outputs.minimal_image_files }}
+    steps:
+    - uses: actions/checkout@v2
+    - uses: dorny/[email protected]
+      id: filter
+      with:
+        filters: '.github/filters.yml'
+
   build:
     runs-on: ubuntu-latest
+    needs: filters
+    if: needs.filters.outputs.found_main_changes
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/octoprint-release.yml

@@ -9,25 +9,25 @@ on:
       - master
 
 jobs:
-  changes:
+  # This job ensures image is only deployed when files that make up the image are changed
+  # (changing docs or build scripts won't result in a push to registry)
+  filters:
     runs-on: ubuntu-latest
     outputs:
-      noop: ${{ steps.filter.outputs.noop }}
+      found_main_image_changes: ${{ steps.filter.outputs.main_image_files }}
+      found_minimal_image_changes: ${{ steps.filter.outputs.minimal_image_files }}
     steps:
     - uses: actions/checkout@v2
     - uses: dorny/[email protected]
       if: ${{ github.event_name == 'push'}}
       id: filter
       with:
-        filters: |
-          image:
-            - 'root/**'
-            - Dockerfile
+        filters: '.github/filters.yml'
 
   release:
     runs-on: ubuntu-latest
-    needs: changes
-    if: ${{ github.event_name == 'repository_dispatch' || needs.changes.outputs.image == 'true'}}
+    needs: filters
+    if: github.event_name == 'repository_dispatch' || needs.filters.outputs.found_main_changes == 'true'
     strategy:
       matrix:
         tags: ['latest','%X%', '%X.Y%', '%X.Y.Z%']
@@ -36,15 +36,14 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - name: Get Tag if push
-        id: get-octoprint-release
-        if: ${{ github.event_name == 'push'}}
+        id: latest-octoprint
         uses: pozetroninc/github-action-get-latest-release@master
         with:
           owner: OctoPrint
           repo: OctoPrint
       - name: Set Tag on Push
         if: ${{ github.event_name == 'push'}}
-        run: echo "::set-env name=tag_name::${{ steps.get-octoprint-release.outputs.release }}"
+        run: echo "::set-env name=tag_name::${{ steps.latest-octoprint.outputs.release }}"
       - name: Set Tag on dispatch
         if: ${{ github.event_name == 'repository_dispatch' }}
         run: echo "::set-env name=tag_name::${{ github.event.client_payload.tag_name }}"
@@ -69,6 +68,9 @@ jobs:
 
       - name: Build and Deploy
         id: build_deploy
+        #if matrix tag is latest AND tag_name is NOT equal to latest-octoprint don't build
+        # this allows rebuilds of older versions without changing 'latest' to an old release
+        if: !(env.tag_name == 'latest' && ( steps.latest-octprint.outputs.release != env.tag_name ))
         run: |
           docker buildx build --push \
             --platform linux/arm64,linux/amd64,linux/arm/v7 \