Merge pull request #4210 from github/henrymercer/pin-python-for-older-clis-in-ci

Pin Python 3.13.15 for older CLI versions in the multi-language check
Pin Python 3.13.15 for older CLI versions in multi-language check
2026-10-07 19:35:18 +00:00 · 2026-10-07 18:12:41 +00:00 · 2026-10-07 18:58:17 +01:00
2 changed files with 8 additions and 6 deletions
--- a/.github/workflows/__multi-language-autodetect.yml
+++ b/.github/workflows/__multi-language-autodetect.yml
@@ -116,13 +116,14 @@ jobs:
          version: ${{ matrix.version }}
          use-all-platform-bundle: 'false'
          setup-kotlin: 'true'
-      - name: Install Python 3.13 for older CLI versions
-        # We need Python 3.13 for older CLI versions because they are not compatible with Python 3.14 or newer.
+      - name: Install Python 3.13.15 for older CLI versions
+        # Older CLI versions don't work with Python 3.13.16 or newer because their Python extractor
+        # imports `importlib._bootstrap._ERR_MSG`, which those Python versions no longer define.
        # See https://github.com/github/codeql-action/pull/3212
        if: matrix.version != 'nightly-latest' && matrix.version != 'linked'
        uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
        with:
-          python-version: '3.13'
+          python-version: '3.13.15'

      - name: Use Xcode 16
        # Only the older CodeQL CLI versions need Xcode 16, and these run on macOS 15.
--- a/pr-checks/checks/multi-language-autodetect.yml
+++ b/pr-checks/checks/multi-language-autodetect.yml
@@ -20,13 +20,14 @@ env:
 installGo: true
 installDotNet: true
 steps:
-  - name: Install Python 3.13 for older CLI versions
-    # We need Python 3.13 for older CLI versions because they are not compatible with Python 3.14 or newer.
+  - name: Install Python 3.13.15 for older CLI versions
+    # Older CLI versions don't work with Python 3.13.16 or newer because their Python extractor
+    # imports `importlib._bootstrap._ERR_MSG`, which those Python versions no longer define.
    # See https://github.com/github/codeql-action/pull/3212
    if: matrix.version != 'nightly-latest' && matrix.version != 'linked'
    uses: actions/setup-python@5fda3b95a4ea91299a34e894583c3862153e4b97 # v7.0.0
    with:
-      python-version: "3.13"
+      python-version: "3.13.15"

  - name: Use Xcode 16
    # Only the older CodeQL CLI versions need Xcode 16, and these run on macOS 15.
Author	SHA1	Message	Date
Henry Mercer	e0b52dbdc5	Merge pull request #4210 from github/henrymercer/pin-python-for-older-clis-in-ci Pin Python 3.13.15 for older CLI versions in the multi-language check	2026-10-07 18:12:41 +00:00
Henry Mercer	6b99698c8c	Pin Python 3.13.15 for older CLI versions in multi-language check Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>	2026-10-07 18:58:17 +01:00