clean up the pr diff message (#6098)

* clean up the pr diff message

* add dependency to clone-main to avoid possible race

* don't start tests before everything is cloned

* formatting change

.drone/drone.jsonnet

@@ -373,8 +373,8 @@ local manifest(apps) = pipeline('manifest') {
     steps: [
       make('check-drone-drift', container=false) { depends_on: ['clone'] },
       make('check-generated-files', container=false) { depends_on: ['clone'] },
-      make('test', container=false) { depends_on: ['clone'] },
+      run('clone-main', commands=['cd ..', 'git clone $CI_REPO_REMOTE loki-main', 'cd -']) { depends_on: ['clone'] },
-      run('clone-main', commands=['cd ..', 'git clone $CI_REPO_REMOTE loki-main', 'cd -']),
+      make('test', container=false) { depends_on: ['clone', 'clone-main'] },
       run('test-main', commands=['cd ../loki-main', 'BUILD_IN_CONTAINER=false make test']) { depends_on: ['clone-main'] },
       make('compare-coverage', container=false, args=[
         'old=../loki-main/test_results.txt',

.drone/drone.yml

@@ -51,19 +51,22 @@ steps:
   image: grafana/loki-build-image:0.20.4
   name: check-generated-files
 - commands:
-  - make BUILD_IN_CONTAINER=false test
+  - cd ..
+  - git clone $CI_REPO_REMOTE loki-main
+  - cd -
   depends_on:
   - clone
   environment: {}
   image: grafana/loki-build-image:0.20.4
-  name: test
+  name: clone-main
 - commands:
-  - cd ..
+  - make BUILD_IN_CONTAINER=false test
-  - git clone $CI_REPO_REMOTE loki-main
+  depends_on:
-  - cd -
+  - clone
+  - clone-main
   environment: {}
   image: grafana/loki-build-image:0.20.4
-  name: clone-main
+  name: test
 - commands:
   - cd ../loki-main
   - BUILD_IN_CONTAINER=false make test
@@ -1164,6 +1167,6 @@ kind: secret
 name: deploy_config
 ---
 kind: signature
-hmac: 4596e741ac788d461b3bbb2429c1f61efabaf943aeec6b3cd59eeff8d769de5e
+hmac: e3f0cead040a655e51244d5d71377a4ba506d7f63fae440593f6e7d14018a1e3
 
 ...

tools/diff_coverage.sh

@@ -5,6 +5,11 @@ if [[ ! -f "$1" ]] || [[ ! -f "$2" ]]; then
     exit 0
 fi
 
+echo
+echo
+echo '**Change in test coverage per package. Green indicates 0 or positive change, red indicates that test coverage for a package fell.**'
+echo
+
 echo '```diff'
 for pkg in ${3//,/ }; do
   old=$(grep "pkg/${pkg}\s" "$1" | sed s/%// | awk '{print $5}')
@@ -12,7 +17,7 @@ for pkg in ${3//,/ }; do
   echo | awk -v pkg="${pkg}" -v old="${old:-0}" -v new="${new:-0}" \
   '{
       sign=new - old < 0 ? "-" : "+"
-      printf ("%s %11s\t%s\n", sign, pkg, new - old)
+      printf ("%s %18s\t%s%%\n", sign, pkg, new - old)
   }'
 done
 echo '```'