add pipeline to generage the coverage badge attempt 2

Author: Dima Koss

.github/workflows/coverage-badge.yml

@@ -2,63 +2,81 @@ name: Coverage badge
 
 on:
   push:
-    branches: [ main ]
+    branches: [ master ]
   pull_request:
 
+env:
+  COVERAGE_FILE: coverage.out
+  BADGE_FILE: coverage.svg
+
 jobs:
   test-and-badge:
+    if: github.actor != 'github-actions[bot]'
     runs-on: ubuntu-latest
+
     steps:
       - name: Checkout
         uses: actions/checkout@v4
         with:
           fetch-depth: 0
 
+      - name: Skip if commit message requests it
+        run: |
+          if git log -1 --pretty=%B | grep -q '$$skip badge$$'; then
+            echo "Found [skip badge] in commit message — exiting"
+            exit 0
+          fi
+
       - name: Set up Go
         uses: actions/setup-go@v4
         with:
           go-version: '1.21'
 
       - name: Install gopherbadger
         run: |
-          go install github.com/mitterst/gopherbadger@latest
-          echo "$GOPATH/bin"
+          GO_BIN="$(go env GOPATH)/bin"
+          mkdir -p "$GO_BIN"
+          GOBIN="$GO_BIN" go install github.com/mitterst/gopherbadger@latest
+          echo "GOBIN=$GO_BIN"
         env:
           GO111MODULE: on
 
-      - name: Run tests with coverage (all packages)
+      - name: Run tests and produce coverage
         run: |
-          # create a combined coverage file for all packages
-          rm -f coverage.out
-          go test ./... -covermode=count -coverprofile=coverage.tmp || true
-          # merge per-package profiles if present (this merges multiple coverage.tmp files produced by packages)
-          if [ -f coverage.tmp ]; then
-            mv coverage.tmp coverage.out
-          fi
-          # normalize: ensure coverage.out exists for gopherbadger
-          if [ ! -f coverage.out ]; then
-            echo "mode: count" > coverage.out
+          rm -f $COVERAGE_FILE
+          # run tests for all packages and produce a single profile
+          # use a temp file and merge if multiple packages produce files
+          set -euo pipefail
+          # Try a simple go test for all packages; if it fails for some packages, still produce profile
+          go test ./... -covermode=count -coverprofile=profile.tmp || true
+          if [ -f profile.tmp ]; then
+            # ensure header only once
+            awk 'NR==1{print; next} /^mode: /{next} {print}' profile.tmp > $COVERAGE_FILE
+            rm -f profile.tmp
+          else
+            echo "mode: count" > $COVERAGE_FILE
           fi
 
       - name: Generate coverage badge (SVG)
         run: |
-          # Produce badge.svg and update README.md if desired
-          gopherbadger -coverprofile=coverage.out -svg=coverage.svg -md="README.md"
+          GO_BIN="$(go env GOPATH)/bin"
+          PATH="$GO_BIN:$PATH" gopherbadger -coverprofile=$COVERAGE_FILE -svg=$BADGE_FILE -md="README.md"
         env:
-          PATH: ${{ env.PATH }}:${{ github.workspace }}/go/bin
+          PATH: ${{ runner.temp }}
 
       - name: Commit and push coverage badge
         if: ${{ github.ref == 'refs/heads/main' }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         run: |
           git config user.name "github-actions[bot]"
-          git config user.email "github-actions[bot]@users.noreply.github.com"
-          git add coverage.svg README.md || true
-          # only commit when there are changes
-          if ! git diff --staged --quiet; then
-            git commit -m "chore: update coverage badge"
-            git push
-          else
-            echo "No changes to commit"
+          git.config_email="github-actions[bot]@users.noreply.github.com"
+          git config user.email "$git.config_email"
+          git add $BADGE_FILE README.md || true
+          if git diff --staged --quiet; then
+            echo "No badge changes to commit"
+            exit 0
           fi
-        env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          git commit -m "chore: update coverage badge [skip badge]"
+          git push origin HEAD:main
+