[chore] Fix scoped tests (open-telemetry#38931)

Scoped tests were broken for some time since the action to grab the
changed sources had to be removed. The runs were green but not actually
testing anything. This change fixes that and also starts to run "make"
instead of "make test" for the affected components.

---------

Co-authored-by: Alex Boten <[email protected]>

Author: pjanotti

.gitattributes

@@ -4,3 +4,6 @@
 
 go.sum linguist-generated=true
 
+# To avoid git status and other tools reporting files due to different line endings
+# normalize the line endings to LF
+* text=auto eol=lf

.github/workflows/scoped-test.yaml

@@ -12,25 +12,45 @@ jobs:
   changedfiles:
     runs-on: ubuntu-latest
     if: ${{ github.actor != 'dependabot[bot]' }}
+    env:
+      PR_HEAD: ${{ github.event.pull_request.head.sha }}
     outputs:
-      go_sources: ${{ steps.changed-source.outputs.go_sources }}
-      go_tests: ${{ steps.changed-test.outputs.go_tests }}
+      go_sources: ${{ steps.changes.outputs.go_sources }}
+      go_tests: ${{ steps.changes.outputs.go_tests }}
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
         with:
           fetch-depth: 0
-      - name: Get changed files
-        id: changed-source
-        run: |
-          files=$(git diff --name-only --diff-filter=ACMRTUXB $(git merge-base origin/main $PR_HEAD) $PR_HEAD | grep .go$ | xargs)
 
-          echo "go_sources=$files" >> $GITHUB_OUTPUT
-      - name: Get changed files
-        id: changed-test
+      - name: Get changes
+        shell: bash
+        id: changes
         run: |
-          files=$(git diff --name-only --diff-filter=ACMRTUXB $(git merge-base origin/main $PR_HEAD) $PR_HEAD | grep _test.go$ | xargs)
+          changed_files=$(git diff --name-only --diff-filter=ACMRTUXB $(git merge-base origin/main $PR_HEAD) $PR_HEAD)
+          echo changed_files
+          echo $changed_files
+
+          go_sources=$(echo "$changed_files" | tr ' ' '\n' | grep -E '\.go$' | grep -v -E '.*_test\.go$' || true)
+          echo go_sources
+          echo $go_sources
+          if [[ -n "$go_sources" ]]; then
+            {
+              echo 'go_sources<<EOF'
+              echo $go_sources
+              echo EOF
+            } >> $GITHUB_OUTPUT
+          fi
 
-          echo "go_tests=$files" >> $GITHUB_OUTPUT
+          go_tests=$(echo "$changed_files" | tr ' ' '\n' | grep -E '.*_test\.go$' || true)
+          echo go_tests
+          echo $go_tests
+          if [[ -n "$go_tests" ]]; then
+            {
+              echo 'go_tests<<EOF'
+              echo $go_tests
+              echo EOF
+            } >> $GITHUB_OUTPUT
+          fi
 
   scoped-tests:
     needs: changedfiles
@@ -83,4 +103,4 @@ jobs:
         env:
           CHANGED_GOLANG_SOURCES: ${{ needs.changedfiles.outputs.go_sources }}
         run: |
-          make for-affected-components CMD="make test"
+          make for-affected-components CMD="make"