ci: Use composite action to collect changes

Signed-off-by: Bᴇʀɴᴅ Sᴄʜᴏʀɢᴇʀs <me@bjw-s.dev>

.github/actions/collect-changes/action.yaml

@@ -0,0 +1,44 @@
+name: "Collect changes"
+description: "Collects and stores changed files/charts"
+
+outputs:
+  changesDetected:
+    description: "Whether or not changes to charts have been detected"
+    value: ${{ steps.filter.outputs.addedOrModified }}
+  addedOrModifiedFiles:
+    description: "A list of the files changed"
+    value: ${{ steps.filter.outputs.addedOrModified_files || "" }}
+  addedOrModifiedCharts:
+    description: "A list of the charts changed"
+    value: ${{ steps.filter-charts.outputs.addedOrModified || "" }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Collect changed files
+      uses: dorny/paths-filter@v2
+      id: filter
+      with:
+        list-files: shell
+        filters: |
+          addedOrModified:
+            - added|modified: 'charts/**'
+
+    - name: Collect changed charts
+      if: |
+        steps.filter.outputs.addedOrModified == 'true'
+      id: filter-charts
+      run: |
+        CHARTS=()
+        PATHS=(${{ steps.filter.outputs.addedOrModified_files }})
+        # Get only the chart paths
+        for CHARTPATH in "${PATHS[@]}"
+        do
+          IFS='/' read -r -a path_parts <<< "${CHARTPATH}"
+          CHARTS+=("${path_parts[1]}/${path_parts[2]}")
+        done
+
+        # Remove duplicates
+        CHARTS=( `printf "%s\n" "${CHARTS[@]}" | sort -u` )
+        # Set output to changed charts
+        printf "::set-output name=addedOrModified::%s\n" "${CHARTS[*]}"

.github/workflows/charts-release.yaml

@@ -42,39 +42,15 @@ jobs:
           wget -O /tmp/helm-docs.deb  https://github.com/k8s-at-home/helm-docs/releases/download/v0.1.1/helm-docs_0.1.1_Linux_x86_64.deb
           sudo dpkg -i /tmp/helm-docs.deb
 
-      - name: Collect changed files
-        uses: dorny/paths-filter@v2
-        id: filter
-        with:
-          list-files: shell
-          filters: |
-            addedOrModified:
-              - added|modified: 'charts/**'
-
-      - name: Collect changed charts
-        if: |
-          steps.filter.outputs.addedOrModified == 'true'
-        id: filter-charts
-        run: |
-          CHARTS=()
-          PATHS=(${{ steps.filter.outputs.addedOrModified_files }})
-          # Get only the chart paths
-          for CHARTPATH in "${PATHS[@]}"
-          do
-            IFS='/' read -r -a path_parts <<< "${CHARTPATH}"
-            CHARTS+=("${path_parts[1]}/${path_parts[2]}")
-          done
-
-          # Remove duplicates
-          CHARTS=( `printf "%s\n" "${CHARTS[@]}" | sort -u` )
-          # Set output to changed charts
-          printf "::set-output name=addedOrModified::%s\n" "${CHARTS[*]}"
+      - name: Collect changes
+        id: collect-changes
+        uses: ./.github/actions/collect-changes
 
       - name: Generate README for changed charts in Renovate PR's
         if: |
-          steps.filter.outputs.addedOrModified == 'true'
+          steps.collect-changes.outputs.addedOrModified == 'true'
         run: |
-          CHARTS=(${{ steps.filter-charts.outputs.addedOrModified }})
+          CHARTS=(${{ steps.collect-changes.outputs.addedOrModifiedCharts }})
           for i in "${CHARTS[@]}"
           do
               IFS='/' read -r -a chart_parts <<< "$i"

.github/workflows/pr-metadata.yaml

@@ -47,37 +47,13 @@ jobs:
     name: Collect PR changes
     runs-on: ubuntu-latest
     outputs:
-      addedOrModified: ${{ steps.filter.outputs.addedOrModified }}
-      addedOrModifiedFiles: ${{ steps.filter.outputs.addedOrModified_files }}
-      addedOrModifiedCharts: ${{ steps.filter-charts.outputs.addedOrModified }}
+      addedOrModified: ${{ steps.collect-changes.outputs.addedOrModified }}
+      addedOrModifiedFiles: ${{ steps.collect-changes.outputs.addedOrModifiedFiles }}
+      addedOrModifiedCharts: ${{ steps.collect-changes.outputs.addedOrModifiedCharts }}
     steps:
       - name: Checkout
         uses: actions/checkout@v2
 
-      - name: Collect changed files
-        uses: dorny/paths-filter@v2
-        id: filter
-        with:
-          list-files: shell
-          filters: |
-            addedOrModified:
-              - added|modified: 'charts/**'
-
-      - name: Collect changed charts
-        if: |
-          steps.filter.outputs.addedOrModified == 'true'
-        id: filter-charts
-        run: |
-          CHARTS=()
-          PATHS=(${{ steps.filter.outputs.addedOrModified_files }})
-          # Get only the chart paths
-          for CHARTPATH in "${PATHS[@]}"
-          do
-            IFS='/' read -r -a path_parts <<< "${CHARTPATH}"
-            CHARTS+=("${path_parts[1]}/${path_parts[2]}")
-          done
-
-          # Remove duplicates
-          CHARTS=( `printf "%s\n" "${CHARTS[@]}" | sort -u` )
-          # Set output to changed charts
-          printf "::set-output name=addedOrModified::%s\n" "${CHARTS[*]}"
+      - name: Collect changes
+        id: collect-changes
+        uses: ./.github/actions/collect-changes