CI: Improve and cleanup (#6448)

Chores:
- Remove ci-ccache-maint. This has never been useful and is just cruft.
- Remove then unused CI_COMMIT
- Change job names so they come out nicer in the web views
- Make os-name input to reusable-build always explicit

Improvements:
- Have at most build-test job in progress per branch
- Cancel in-progress build-test jobs on PRs
- In forks (that is, not on 'verilator/verilator'), cancel any
  in-progress build-test jobs on push to the branch

.github/workflows/build-test.yml

@@ -22,16 +22,18 @@ defaults:
     working-directory: repo
 
 concurrency:
-  group: ${{ github.workflow }}-${{ github.actor }}-${{ github.event_name == 'pull_request' && github.ref || github.run_id }}
-  cancel-in-progress: true
+  # At most 1 job per branch. Auto cancel on pull requests and on all forks
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: ${{ github.event_name == 'pull_request' || github.repository != 'verilator/verilator' }}
 
 jobs:
 
   build-2404-gcc:
-    name: Build-Ubuntu
+    name: Build | ${{ matrix.os }} | ${{ matrix.cc }}${{ matrix.asan && ' | asan' || '' }}
     uses: ./.github/workflows/reusable-build.yml
     with:
       os: ${{ matrix.os }}
+      os-name: linux
       cc: ${{ matrix.cc }}
       asan: ${{ matrix.asan }}
     strategy:
@@ -41,10 +43,11 @@ jobs:
           - {os: ubuntu-24.04, cc: gcc, asan: 0}
 
   build-2404-clang:
-    name: Build-Ubuntu
+    name: Build | ${{ matrix.os }} | ${{ matrix.cc }}${{ matrix.asan && ' | asan' || '' }}
     uses: ./.github/workflows/reusable-build.yml
     with:
       os: ${{ matrix.os }}
+      os-name: linux
       cc: ${{ matrix.cc }}
       asan: ${{ matrix.asan }}
     strategy:
@@ -54,10 +57,11 @@ jobs:
           - {os: ubuntu-24.04, cc: clang, asan: 1}
 
   build-2204-gcc:
-    name: Build-Ubuntu
+    name: Build | ${{ matrix.os }} | ${{ matrix.cc }}${{ matrix.asan && ' | asan' || '' }}
     uses: ./.github/workflows/reusable-build.yml
     with:
       os: ${{ matrix.os }}
+      os-name: linux
       cc: ${{ matrix.cc }}
       asan: ${{ matrix.asan }}
     strategy:
@@ -67,10 +71,11 @@ jobs:
           - {os: ubuntu-22.04, cc: gcc, asan: 0}
 
   build-2204-clang:
-    name: Build-Ubuntu
+    name: Build | ${{ matrix.os }} | ${{ matrix.cc }}${{ matrix.asan && ' | asan' || '' }}
     uses: ./.github/workflows/reusable-build.yml
     with:
       os: ${{ matrix.os }}
+      os-name: linux
       cc: ${{ matrix.cc }}
       asan: ${{ matrix.asan }}
     strategy:
@@ -80,7 +85,7 @@ jobs:
           - {os: ubuntu-22.04, cc: clang, asan: 0}
 
   build-osx-gcc:
-    name: Build-OSX
+    name: Build | ${{ matrix.os }} | ${{ matrix.cc }}${{ matrix.asan && ' | asan' || '' }}
     uses: ./.github/workflows/reusable-build.yml
     with:
       os: ${{ matrix.os }}
@@ -94,7 +99,7 @@ jobs:
           - {os: macos-15, cc: gcc, asan: 0}
 
   build-osx-clang:
-    name: Build-OSX
+    name: Build | ${{ matrix.os }} | ${{ matrix.cc }}${{ matrix.asan && ' | asan' || '' }}
     uses: ./.github/workflows/reusable-build.yml
     with:
       os: ${{ matrix.os }}
@@ -108,7 +113,7 @@ jobs:
           - {os: macos-15, cc: clang, asan: 0}
 
   build-windows:
-    name: Build-Windows
+    name: Build | ${{ matrix.os }} | ${{ matrix.cc }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -117,7 +122,6 @@ jobs:
           - {os: windows-2025, cc: msvc}
     env:
       CI_OS_NAME: win
-      CI_COMMIT: ${{ github.sha }}
       CCACHE_COMPRESS: 1
       CCACHE_DIR: ${{ github.workspace }}/.ccache
       CCACHE_LIMIT_MULTIPLE: 0.95
@@ -145,7 +149,7 @@ jobs:
           name: verilator-win.zip
 
   test-2404-gcc:
-    name: Test | ${{ matrix.os }} | ${{ matrix.cc }}
+    name: Test | ${{ matrix.os }} | ${{ matrix.cc }} | ${{ matrix.reloc && 'reloc | ' || '' }} ${{ matrix.suite }}
     needs: build-2404-gcc
     uses: ./.github/workflows/reusable-test.yml
     with:
@@ -167,7 +171,7 @@ jobs:
           - {os: ubuntu-24.04, cc: gcc, reloc: 0, suite: vltmt-2}
 
   test-2404-clang:
-    name: Test | ${{ matrix.os }} | ${{ matrix.cc }}
+    name: Test | ${{ matrix.os }} | ${{ matrix.cc }} | ${{ matrix.reloc && 'reloc | ' || '' }} ${{ matrix.suite }}
     needs: build-2404-clang
     uses: ./.github/workflows/reusable-test.yml
     with:
@@ -189,7 +193,7 @@ jobs:
           - {os: ubuntu-24.04, cc: clang, reloc: 0, suite: vltmt-2}
 
   test-2204-gcc:
-    name: Test | ${{ matrix.os }} | ${{ matrix.cc }}
+    name: Test | ${{ matrix.os }} | ${{ matrix.cc }} | ${{ matrix.reloc && 'reloc | ' || '' }} ${{ matrix.suite }}
     needs: build-2204-gcc
     uses: ./.github/workflows/reusable-test.yml
     with:
@@ -211,7 +215,7 @@ jobs:
           - {os: ubuntu-22.04, cc: gcc, reloc: 0, suite: vltmt-2}
 
   test-2204-clang:
-    name: Test | ${{ matrix.os }} | ${{ matrix.cc }}
+    name: Test | ${{ matrix.os }} | ${{ matrix.cc }} | ${{ matrix.reloc && 'reloc | ' || '' }} ${{ matrix.suite }}
     needs: build-2204-clang
     uses: ./.github/workflows/reusable-test.yml
     with:

.github/workflows/coverage.yml

@@ -14,7 +14,6 @@ permissions:
 
 env:
   CI_OS_NAME: linux
-  CI_COMMIT: ${{ github.sha }}
   COVERAGE: 1
   VERILATOR_ARCHIVE: verilator-coverage-${{ github.sha }}.tar.gz
 

.github/workflows/format.yml

@@ -7,10 +7,7 @@ on:
   push:
     branches-ignore:
       - 'dependabot/**'  # Avoid duplicates: only run the PR, not the push
-  pull_request_target:
-  workflow_dispatch:
-permissions:
-  contents: write
+
 jobs:
   format:
     runs-on: ubuntu-24.04

.github/workflows/reusable-build.yml

@@ -10,20 +10,18 @@ on:
       os:  # e.g. ubuntu-24.04
         required: true
         type: string
-      cc:  # gcc or clang
+      cc: # 'clang' or 'gcc'
         required: true
         type: string
-      os-name:
-        required: false
+      os-name: # 'linux' or 'osx'
+        required: true
         type: string
-        default: linux
       asan:
         required: true
         type: number
 
 env:
   CI_OS_NAME: ${{ inputs.os-name }}
-  CI_COMMIT: ${{ github.sha }}
   CCACHE_COMPRESS: 1
   CCACHE_DIR: ${{ github.workspace }}/.ccache
   CCACHE_LIMIT_MULTIPLE: 0.95
@@ -39,7 +37,7 @@ jobs:
 
   build:
     runs-on: ${{ inputs.os }}
-    name: Sub-build | ${{ inputs.os }} | ${{ inputs.cc }}
+    name: Build
     env:
       CI_ASAN: ${{ inputs.asan }}
       CI_BUILD_STAGE_NAME: build

.github/workflows/reusable-lint-py.yml

@@ -9,7 +9,6 @@ on:
 
 env:
   CI_OS_NAME: linux
-  CI_COMMIT: ${{ github.sha }}
   CI_BUILD_STAGE_NAME: build
   CI_RUNS_ON: ubuntu-22.04
   CCACHE_COMPRESS: 1

.github/workflows/reusable-test.yml

@@ -22,7 +22,6 @@ on:
 
 env:
   CI_OS_NAME: linux
-  CI_COMMIT: ${{ github.sha }}
   CCACHE_COMPRESS: 1
   CCACHE_DIR: ${{ github.workspace }}/.ccache
   CCACHE_LIMIT_MULTIPLE: 0.95
@@ -38,7 +37,7 @@ jobs:
 
   test:
     runs-on: ${{ inputs.os }}
-    name: Sub-test | ${{ inputs.os }} | ${{ inputs.cc }} | ${{inputs.reloc && 'reloc | ' || '' }} ${{ inputs.suite }}
+    name: Test
     env:
       CI_BUILD_STAGE_NAME: test
       CI_RUNS_ON: ${{ inputs.os }}

.github/workflows/rtlmeter.yml

@@ -20,7 +20,8 @@ defaults:
     shell: bash
 
 concurrency:
-  group: ${{ github.ref }}
+  # At most 1 job per branch. Auto cancel all but scheduled jobs
+  group: ${{ github.worfklow }}-${{ github.ref }}
   cancel-in-progress: ${{ github.event_name != 'schedule' }}
 
 jobs: