[6.2.0] Silence setlocale warnings in Java stub #17741
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Since 17cfa01, the java_stub_template.txt file calls into the locale tool to check for the presence of cetain locales. These calls correctly send error messages to stderr. Unfortunately, *bash* itself is doing locale lookups as soon as it sees that the LANG or LC_* variables are touched, and this results in warnings that pollute the output. In our builds, the output is polluted with hundreds of warnings like these: ``` bazel-out/aarch64-opt-exec-CF41B97/bin/external/bfg/lang/java/src/main/java/com/google/devtools/build/bfg/JavaSourceFileParserCli: line 100: warning: setlocale: LC_CTYPE: cannot change locale (): No such file or directory bazel-out/aarch64-opt-exec-CF41B97/bin/external/bfg/lang/java/src/main/java/com/google/devtools/build/bfg/JavaSourceFileParserCli: line 102: warning: setlocale: LC_CTYPE: cannot change locale (): No such file or directory ``` There is nothing we can do to avoid these warnings. Trying to set the LANG or LC_* variables via --action_env and --host_action_env has no effect (other than trigger more/different warnings). The problem stems from https://bugzilla.redhat.com/show_bug.cgi?id=1361965, which has been fixed in various distros but hasn't made its way to the one we are currently using. Given that it's bash that is complaining, we can easily side-step this issue by patching the template and wrapping the problematic invocations behind "env". In this way, bash never gets to see the locale changes. This change does precisely this. Closes bazelbuild#17670. PiperOrigin-RevId: 515350095 Change-Id: I1887003802aa329e7fb96f644a2fba906daf5165
cushon
approved these changes
Mar 11, 2023
This was referenced May 30, 2023
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Since 17cfa01, the java_stub_template.txt file calls into the locale tool to check for the presence of cetain locales. These calls correctly send error messages to stderr.
Unfortunately, bash itself is doing locale lookups as soon as it sees that the LANG or LC_* variables are touched, and this results in warnings that pollute the output. In our builds, the output is polluted with hundreds of warnings like these:
There is nothing we can do to avoid these warnings. Trying to set the LANG or LC_* variables via --action_env and --host_action_env has no effect (other than trigger more/different warnings).
The problem stems from https://bugzilla.redhat.com/show_bug.cgi?id=1361965, which has been fixed in various distros but hasn't made its way to the one we are currently using.
Given that it's bash that is complaining, we can easily side-step this issue by patching the template and wrapping the problematic invocations behind "env". In this way, bash never gets to see the locale changes. This change does precisely this.
Closes #17670.
PiperOrigin-RevId: 515350095
Change-Id: I1887003802aa329e7fb96f644a2fba906daf5165