[llvm] [workflows] Add post-commit job that periodically runs the clang static analyzer (PR #94106)

[Tom Stellard via llvm-commits]

================
@@ -0,0 +1,69 @@
+name: Post-Commit Static Analyzer
+
+permissions:
+  contents: read
+
+on:
+  push:
+    branches:
+      - 'release/**'
+    paths:
+      - 'llvm/**'
+      - '.github/workflows/ci-post-commit-analyzer.yml'
+  pull_request:
+    paths:
+      - '.github/workflows/ci-post-commit-analyzer.yml'
+  schedule:
+    - cron: '30 0 * * *'
+
+concurrency:
+  group: >-
+    llvm-project-${{ github.workflow }}-${{ github.event_name == 'pull_request' &&
+      ( github.event.pull_request.number || github.ref) }}
+  cancel-in-progress: ${{ startsWith(github.ref, 'refs/pull/') }}
+
+jobs:
+  post-commit-analyzer:
+    if: >-
+      github.repository_owner == 'llvm' &&
+      github.event.action != 'closed'
+    runs-on: ubuntu-22.04
+    env:
+      LLVM_VERSION: 18
+    steps:
+      - name: Checkout Source
+        uses: actions/checkout at b4ffde65f46336ab88eb53be808477a3936bae11 # v4.1.1
+
+      - name: Install Dependencies
+        run: |
+          sudo echo "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-18 main" | sudo tee -a /etc/apt/sources.list.d/llvm.list
+          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
+          sudo apt-get update
+          sudo apt-get install \
+            cmake \
+            ninja-build \
+            perl \
+            clang-tools-$LLVM_VERSION \
+            clang-$LLVM_VERSION
+
+      - name: Configure
+        run: |
+          scan-build-$LLVM_VERSION \
+              --use-c++=clang++ \
+              --use-cc=clang \
+              cmake -B build -S llvm -G Ninja \
----------------
tstellar wrote:

> Yes, something like this:
> 
> ```shell
> #!/bin/sh
> "$@"
> "$@" --analyze --analyzer-output html -o "$OUTPUT_DIR" \
>      -Xclang -analyzer-config -Xclang max-nodes=150000
> ```

OK, let me try that.

https://github.com/llvm/llvm-project/pull/94106