[llvm] [Github] Remove separate tools checkout from pr-code workflows (PR #159967)

[Aiden Grossman via llvm-commits]

https://github.com/boomanaiden154 created https://github.com/llvm/llvm-project/pull/159967

These separate checkouts I believe were originally carried over from when we were using pull_request_target. We needed two checkouts to ensure we were not executing user supplied code. We kept them to ensure we were using the latest version of the tools, but this was born mostly out of a misunderstanding of how Github Actions works. All PRs directly against main are executed as if merged into main, so already are using the latest version of the tools no matter the branch point. Stacked PRs still need to be rebased for changes to propagate but these files have been pretty stable for the past two years or so and I can't imagine any changes needed to keep things running on release/stacked PR branches.

>From b30b9a17891d45d023413cad2f71d1737deffa48 Mon Sep 17 00:00:00 2001
From: Aiden Grossman <aidengrossman at google.com>
Date: Sun, 21 Sep 2025 05:08:27 +0000
Subject: [PATCH] [Github] Remove separate tools checkout from pr-code
 workflows

These separate checkouts I believe were originally carried over from
when we were using pull_request_target. We needed two checkouts to
ensure we were not executing user supplied code. We kept them to ensure
we were using the latest version of the tools, but this was born mostly
out of a misunderstanding of how Github Actions works. All PRs directly
against main are executed as if merged into main, so already are using
the latest version of the tools no matter the branch point. Stacked PRs
still need to be rebased for changes to propagate but these files have
been pretty stable for the past two years or so and I can't imagine any
changes needed to keep things running on release/stacked PR branches.
---
 .github/workflows/pr-code-format.yml | 19 +++----------------
 .github/workflows/pr-code-lint.yml   | 16 ++--------------
 2 files changed, 5 insertions(+), 30 deletions(-)

diff --git a/.github/workflows/pr-code-format.yml b/.github/workflows/pr-code-format.yml
index 9396bf019e1ac..61c8680cd72a1 100644
--- a/.github/workflows/pr-code-format.yml
+++ b/.github/workflows/pr-code-format.yml
@@ -32,19 +32,6 @@ jobs:
           base_sha: 'HEAD~1'
           sha: 'HEAD'
 
-      # We need to pull the script from the main branch, so that we ensure
-      # we get the latest version of this script.
-      - name: Fetch code formatting utils
-        uses: actions/checkout at 08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          repository: ${{ github.repository }}
-          ref: ${{ github.base_ref }}
-          sparse-checkout: |
-            llvm/utils/git/requirements_formatting.txt
-            llvm/utils/git/code-format-helper.py
-          sparse-checkout-cone-mode: false
-          path: code-format-tools
-
       - name: "Listed files"
         env:
           CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
@@ -65,10 +52,10 @@ jobs:
         with:
           python-version: '3.11'
           cache: 'pip'
-          cache-dependency-path: 'code-format-tools/llvm/utils/git/requirements_formatting.txt'
+          cache-dependency-path: 'llvm/utils/git/requirements_formatting.txt'
 
       - name: Install python dependencies
-        run: pip install -r code-format-tools/llvm/utils/git/requirements_formatting.txt
+        run: pip install -r llvm/utils/git/requirements_formatting.txt
 
       - name: Run code formatter
         env:
@@ -77,7 +64,7 @@ jobs:
         # Create an empty comments file so the pr-write job doesn't fail.
         run: |
           echo "[]" > comments &&
-          python ./code-format-tools/llvm/utils/git/code-format-helper.py \
+          python ./llvm/utils/git/code-format-helper.py \
             --write-comment-to-file \
             --token ${{ secrets.GITHUB_TOKEN }} \
             --issue-number $GITHUB_PR_NUMBER \
diff --git a/.github/workflows/pr-code-lint.yml b/.github/workflows/pr-code-lint.yml
index adb6c6e8f4c76..16f514ba27c17 100644
--- a/.github/workflows/pr-code-lint.yml
+++ b/.github/workflows/pr-code-lint.yml
@@ -45,18 +45,6 @@ jobs:
         run: |
           echo "Changed files:"
           echo "$CHANGED_FILES"
-      
-      - name: Fetch code linting utils
-        uses: actions/checkout at 08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-        with:
-          repository: ${{ github.repository }}
-          ref: ${{ github.base_ref }}
-          sparse-checkout: |
-            llvm/utils/git/code-lint-helper.py
-            llvm/utils/git/requirements_linting.txt
-            clang-tools-extra/clang-tidy/tool/clang-tidy-diff.py
-          sparse-checkout-cone-mode: false
-          path: code-lint-tools
 
       - name: Install clang-tidy
         uses: aminya/setup-cpp at 17c11551771948abc5752bbf3183482567c7caf0 # v1.1.1
@@ -69,7 +57,7 @@ jobs:
           python-version: '3.12'
 
       - name: Install Python dependencies
-        run: python3 -m pip install -r code-lint-tools/llvm/utils/git/requirements_linting.txt
+        run: python3 -m pip install -r llvm/utils/git/requirements_linting.txt
       
       # TODO: create special mapping for 'codegen' targets, for now build predefined set
       # TODO: add entrypoint in 'compute_projects.py' that only adds a project and its direct dependencies
@@ -106,7 +94,7 @@ jobs:
           CHANGED_FILES: ${{ steps.changed-files.outputs.all_changed_files }}
         run: |
           echo "[]" > comments &&
-          python3 ./code-lint-tools/llvm/utils/git/code-lint-helper.py \
+          python3 llvm/utils/git/code-lint-helper.py \
             --token ${{ secrets.GITHUB_TOKEN }} \
             --issue-number $GITHUB_PR_NUMBER \
             --start-rev HEAD~1 \