Add descriptions of concurrencies

.github/workflows/build.yml

@@ -19,6 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         target: [ Gplay, Fdroid ]
+        # Allow all jobs on develop. Just one per PR.
     concurrency:
       group: ${{ github.ref == 'refs/heads/develop' && format('integration-tests-develop-{0}-{1}', matrix.target, github.sha) || format('build-debug-{0}-{1}', matrix.target, github.ref)  }}
       cancel-in-progress: true
@@ -45,6 +46,7 @@ jobs:
     name: Build unsigned GPlay APKs
     runs-on: ubuntu-latest
     if: github.ref == 'refs/heads/main'
+    # Only runs on main, no concurrency.
     steps:
       - uses: actions/checkout@v2
       - uses: actions/cache@v2

.github/workflows/integration_tests.yml

@@ -1,4 +1,3 @@
-#no-op
 name: Integration Tests
 
 on:
@@ -16,6 +15,7 @@ jobs:
   build-android-test-matrix-sdk:
     name: Matrix SDK - Build Android Tests
     runs-on: ubuntu-latest
+    # Allow all jobs on main and develop. Just one per PR.
     concurrency:
       group: ${{ github.ref == 'refs/heads/main' && format('test-matrix-sdk-main-{0}', github.sha) || github.ref == 'refs/heads/develop' && format('test-matrix-sdk-develop-{0}', github.sha) || format('test-matrix-sdk-{0}', github.ref) }}
       cancel-in-progress: true
@@ -36,6 +36,7 @@ jobs:
   build-android-test-app:
     name: App - Build Android Tests
     runs-on: ubuntu-latest
+    # Allow all jobs on main and develop. Just one per PR.
     concurrency:
       group: ${{ github.ref == 'refs/heads/main' && format('test-app-main-{0}', github.sha) || github.ref == 'refs/heads/develop' && format('test-app-develop-{0}', github.sha) || format('test-app-{0}', github.ref) }}
       cancel-in-progress: true
@@ -56,6 +57,7 @@ jobs:
   integration-tests:
     name: Matrix SDK - Running Integration Tests
     runs-on: ubuntu-latest
+    # Allow all jobs on main and develop. Just one per PR.
     concurrency:
       group: ${{ github.ref == 'refs/heads/main' && format('integration-tests-main-{0}', github.sha) || github.ref == 'refs/heads/develop' && format('integration-tests-develop-{0}', github.sha) || format('integration-tests-{0}', github.ref) }}
       cancel-in-progress: true

.github/workflows/quality.yml

@@ -18,6 +18,7 @@ jobs:
   ktlint:
     name: Kotlin Linter
     runs-on: ubuntu-latest
+    # Allow all jobs on main and develop. Just one per PR.
     concurrency:
       group: ${{ github.ref == 'refs/heads/main' && format('klint-main-{0}', github.sha) || github.ref == 'refs/heads/develop' && format('klint-develop-{0}', github.sha) || format('klint-{0}', github.ref) }}
       cancel-in-progress: true
@@ -90,6 +91,7 @@ jobs:
   android-lint:
     name: Android Linter
     runs-on: ubuntu-latest
+    # Allow all jobs on main and develop. Just one per PR.
     concurrency:
       group: ${{ github.ref == 'refs/heads/main' && format('android-lint-main-{0}', github.sha) || github.ref == 'refs/heads/develop' && format('android-lint-develop-{0}', github.sha) || format('android-lint-{0}', github.ref) }}
       cancel-in-progress: true
@@ -122,6 +124,7 @@ jobs:
       fail-fast: false
       matrix:
         target: [ Gplay, Fdroid ]
+    # Allow all jobs on develop. Just one per PR.
     concurrency:
       group: ${{ github.ref == 'refs/heads/develop' && format('apk-lint-develop-{0}', github.sha) || format('apk-lint-{0}-{1}', matrix.target, github.ref) }}
       cancel-in-progress: true

.github/workflows/tests.yml

@@ -14,6 +14,7 @@ jobs:
   unit-tests:
     name: Run Unit Tests
     runs-on: ubuntu-latest
+    # Allow all jobs on main and develop. Just one per PR.
     concurrency:
       group: ${{ github.ref == 'refs/heads/main' && format('unit-test-main-{0}', github.sha) || github.ref == 'refs/heads/develop' && format('unit-test-develop-{0}', github.sha) || format('unit-test-{0}', github.ref) }}
       cancel-in-progress: true