GITHUB: added linter action for pr review (Domain-Connect#526)

.github/workflows/dc-template-lint.yml

@@ -0,0 +1,137 @@
+name: Lint Domain Connect Templates
+
+on:
+  pull_request_target:
+    branches:
+      - master
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v3
+        with:
+            fetch-depth: 2
+            ref: ${{ github.event.pull_request.head.sha }}
+
+      - name: Dump GitHub context
+        env:
+            GITHUB_CONTEXT: ${{ toJson(github) }}
+        run: echo "$GITHUB_CONTEXT"
+
+      - name: Get all changed json files
+        id: changed-json-files
+        uses: tj-actions/changed-files@v42
+        with:
+          files: |
+             **.json
+
+      - name: Print all changed json files
+        if: steps.changed-json-files.outputs.any_changed == 'true'
+        env:
+          ALL_CHANGED_FILES: ${{ steps.changed-json-files.outputs.all_changed_files }}
+        run: |
+          for file in ${ALL_CHANGED_FILES}; do
+            echo "$file was changed"
+          done
+
+      - name: Check all modified json files for version update
+        id: check-version-bump-needed
+        if: steps.changed-json-files.outputs.modified_files_count > 0
+        env:
+            ALL_MODIFIED_FILES: ${{ steps.changed-json-files.outputs.modified_files }}
+        run: |
+            echo "version_bump_check<<EOF" >> $GITHUB_ENV
+            echo "version_bump_check=0" >> "$GITHUB_OUTPUT"
+            echo "Base: ${{ github.event.pull_request.base.sha }}"
+            echo "Head: ${{ github.event.pull_request.head.sha }}"
+            for file in ${ALL_MODIFIED_FILES}; do
+                echo "$file was modified"
+                echo "File diff $file:"
+                git diff -U0 ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} -- $file
+                echo "Check version field diff:"
+                if ! git diff -U0 ${{ github.event.pull_request.base.sha }}..${{ github.event.pull_request.head.sha }} -- $file | grep "version"; then
+                    echo "No version update detected!"
+                    echo "$file" >> $GITHUB_ENV
+                    echo "version_bump_check=1" >> "$GITHUB_OUTPUT"
+                fi
+            done
+            echo "EOF" >> $GITHUB_ENV
+
+      - name: Comment PR with version check result
+        if: steps.check-version-bump-needed.outputs.version_bump_check == 1
+        uses: thollander/actions-comment-pull-request@v2
+        with:
+          message: |
+            Version bump needed for the files:
+            ```
+            ${{ env.version_bump_check }}
+            ```
+          comment_tag: version_bump
+
+      - name: Remove comment PR with version check result if not needed
+        if: steps.check-version-bump-needed.outputs.version_bump_check != 1
+        uses: thollander/actions-comment-pull-request@v2
+        with:
+          message: "Version bump not needed"
+          mode: delete
+          create_if_not_exists: false
+          comment_tag: version_bump
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: '^1.16'
+
+      - name: Install dc-template-linter
+        run: |
+            go install github.com/Domain-Connect/dc-template-linter@latest
+            echo `go env GOPATH`/bin
+
+      - name: Lint changed Templates
+        if: steps.changed-json-files.outputs.any_changed == 'true'
+        id: linter-output
+        env:
+            ALL_CHANGED_FILES: ${{ steps.changed-json-files.outputs.all_changed_files }}
+        run: |
+          git status
+          ls -al
+          echo "linter_error=0" >> "$GITHUB_OUTPUT"
+          echo "linter_output<<EOF" >> $GITHUB_ENV
+          echo "Linter result for $file" >> $GITHUB_ENV
+          for file in ${ALL_CHANGED_FILES}; do
+            `go env GOPATH`/bin/dc-template-linter -loglevel info $file 2>> $GITHUB_ENV || true
+            if ! `go env GOPATH`/bin/dc-template-linter -tolerate warn $file; then
+                echo "linter_error=1" >> "$GITHUB_OUTPUT"
+                echo "Linter error for $file"
+                `go env GOPATH`/bin/dc-template-linter -loglevel error $file || true
+            fi
+          done
+          echo "EOF" >> $GITHUB_ENV
+
+      - name: Comment PR with linter error result
+        if: steps.linter-output.outputs.linter_error == 1
+        uses: thollander/actions-comment-pull-request@v2
+        with:
+          message: |
+            Linter error:
+            ```
+            ${{ env.linter_output }}
+            ```
+          comment_tag: linter
+
+      - name: Comment PR with linter OK result
+        if: steps.linter-output.outputs.linter_error != 1
+        uses: thollander/actions-comment-pull-request@v2
+        with:
+            message: |
+              Linter OK:
+              ```
+              ${{ env.linter_output }}
+              ```
+            comment_tag: linter
+
+      - name: Fail job if version check or linter fails
+        if: steps.linter-output.outputs.linter_error == 1 || steps.check-version-bump-needed.outputs.version_bump_check == 1
+        run: exit 1