[libcxx-commits] [libcxx] [libc++][CI] Improves updating Docker image. (PR #134497)

[via libcxx-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->

@llvm/pr-subscribers-libcxx

Author: Mark de Wever (mordante)

<details>
<summary>Changes</summary>

This makes it easier to build a new Docker image in the CI. Since the new image is not used automatically it's safe to commit these changes directly to main. Then use a PR to test the new image.

---
Full diff: https://github.com/llvm/llvm-project/pull/134497.diff


1 Files Affected:

- (modified) libcxx/utils/ci/Dockerfile (+4) 


``````````diff
diff --git a/libcxx/utils/ci/Dockerfile b/libcxx/utils/ci/Dockerfile
index af8ebd4d405f2..e0591f0224102 100644
--- a/libcxx/utils/ci/Dockerfile
+++ b/libcxx/utils/ci/Dockerfile
@@ -44,6 +44,10 @@
 ARG BASE_IMAGE
 FROM $BASE_IMAGE AS builder-base
 
+# Changing this file causes a rebuild of the image in a GitHub action.
+# The date uses the ISO format YYYY-MM-DD.
+RUN echo "Last forced update executed on 2025-04-05."
+
 # Make sure apt-get doesn't try to prompt for stuff like our time zone, etc.
 ENV DEBIAN_FRONTEND=noninteractive
 

``````````

</details>


https://github.com/llvm/llvm-project/pull/134497