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Fix CI diagnostics for failed bazel builds on Windows #42006

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merged 1 commit into from
Oct 16, 2025
Merged

Fix CI diagnostics for failed bazel builds on Windows #42006

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24 changes: 15 additions & 9 deletions tools/bazel.bat
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Original file line number Diff line number Diff line change
@@ -1,6 +1,5 @@
@echo off & setlocal EnableDelayedExpansion & if not defined bb (set "bb=%TEMP%\%~n0-%RANDOM%.bat" & more /e /p "%~f0" >"!bb!" & call "!bb!" %* & set "rc=!errorlevel!" & del /q "!bb!" & exit /b !rc!)
:: Above one-liner copies the present script to a temporary file with normalized Windows line endings and executes it.
:: Works regardless of actual source line endings because the pseudo-shebang is interpreted before the first newline.
@echo off & setlocal EnableDelayedExpansion
>nul chcp 65001

:: Check `bazelisk` properly bootstraps `bazel` or fail with instructions
if not defined BAZEL_REAL (
Expand Down Expand Up @@ -41,12 +40,13 @@ if exist "!BAZEL_REPO_CONTENTS_CACHE!" (

:: Pass CI-specific options through `.user.bazelrc` so any nested `bazel run` and next `bazel shutdown` also honor them
(
echo startup --connect_timeout_secs=30
echo startup --connect_timeout_secs=5 # instead of 30s, for quicker iterations in diagnostics
echo startup --local_startup_timeout_secs=30 # instead of 120s, to fail faster for diagnostics
echo startup --output_user_root=!BAZEL_OUTPUT_USER_ROOT!
echo common --config=cache
echo common --repo_contents_cache=!ext_repo_contents_cache!
echo build --disk_cache=!BAZEL_DISK_CACHE!
) >"%CI_PROJECT_DIR%\user.bazelrc"
) >"%~dp0..\user.bazelrc"

:: Diagnostics: print any stalled client/server before `bazel` execution
>&2 powershell -NoProfile -Command "Get-Process bazel,java -ErrorAction SilentlyContinue | Select-Object 🟡,ProcessName,StartTime"
Expand All @@ -55,16 +55,22 @@ if exist "!BAZEL_REPO_CONTENTS_CACHE!" (
"%BAZEL_REAL%" %*
set "bazel_exit=!errorlevel!"

:: Diagnostics: dump JVM output on failure
:: Diagnostics: dump logs on failure
if !bazel_exit! neq 0 (
>&2 echo 🟡 JVM output:
>&2 type "!BAZEL_OUTPUT_USER_ROOT!\server\jvm.out"
>&2 echo 🟡 Bazel failed, dumping available info:
for /d %%d in ("!BAZEL_OUTPUT_USER_ROOT!\*") do (
for %%f in ("%%d\java.log.*" "%%d\server\*") do (
>&2 echo 🟡 %%f:
>&2 type "%%f"
>&2 echo.
)
)
exit /b !bazel_exit!
)

:: Stop `bazel` (if still running) to close files and proceed with cleanup
>&2 "%BAZEL_REAL%" shutdown --ui_event_filters=-info
>&2 del /f /q "%CI_PROJECT_DIR%\user.bazelrc"
>&2 del /f /q "%~dp0..\user.bazelrc"

:: Reintegrate `--repo_contents_cache` to original directory
if exist "!ext_repo_contents_cache!" (
Expand Down