[llvm] workflows/release-binaries: Remove .git directory from artifacts (PR #106310)

[Tom Stellard via llvm-commits]

https://github.com/tstellar updated https://github.com/llvm/llvm-project/pull/106310

>From 394676b8c7239aec55cd4bebe7a999ead6bb6299 Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar at redhat.com>
Date: Tue, 27 Aug 2024 16:27:18 -0700
Subject: [PATCH 1/2] workflows/release-binaries: Remove .git directory from
 artifacts

The .git/config file contains a auth token that can be leaked if
the .git directory is included in a workflow artifact.
---
 .github/workflows/release-binaries-save-stage/action.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/release-binaries-save-stage/action.yml b/.github/workflows/release-binaries-save-stage/action.yml
index e2f3eeadd15bea..63d00255f6d8fb 100644
--- a/.github/workflows/release-binaries-save-stage/action.yml
+++ b/.github/workflows/release-binaries-save-stage/action.yml
@@ -18,6 +18,10 @@ runs:
     - name: Package Build and Source Directories
       shell: bash
       run: |
+        # Remove git directory so we avoid leaking secrets stored in .git/config.
+        # See https://unit42.paloaltonetworks.com/github-repo-artifacts-leak-tokens/
+        # This also helps reduce the size of the archive.
+        rm -Rf .git/
         # Windows does not support symlinks, so we need to dereference them.
         tar --exclude build/ ${{ (runner.os == 'Windows' && '-h') || '' }} -c . | zstd -T0 -c > ../llvm-project.tar.zst
         mv ../llvm-project.tar.zst .

>From d7ce523b2118598f6bafc93fcee5dd884efb6761 Mon Sep 17 00:00:00 2001
From: Tom Stellard <tstellar at redhat.com>
Date: Tue, 27 Aug 2024 16:50:17 -0700
Subject: [PATCH 2/2] Add permissions too

---
 .github/workflows/release-binaries-save-stage/action.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/release-binaries-save-stage/action.yml b/.github/workflows/release-binaries-save-stage/action.yml
index 63d00255f6d8fb..4b4be54d6a0612 100644
--- a/.github/workflows/release-binaries-save-stage/action.yml
+++ b/.github/workflows/release-binaries-save-stage/action.yml
@@ -10,6 +10,9 @@ inputs:
     required: true
     type: 'string'
 
+permissions:
+  contents: read
+
 runs:
   using: "composite"
   steps: