Add convenience target for running in the current working directory #29
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rahul-theorem
approved these changes
Apr 16, 2024
mark-thm
commented
Apr 16, 2024
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| exports_files( | ||
| ["multitool.lock.json"], | ||
| ) | ||
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turns out this wasn't necessary
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alexeagle
reviewed
Apr 16, 2024
| execdir="$PWD" | ||
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| pushd "$BUILD_WORKING_DIRECTORY" > /dev/null | ||
| "$execdir/$tool" "$@" |
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I think this is wrong, it leaves a bash process as the parent of the tool process, interfering with signals and leaving a messy pstree. I think you want exec here to replace the current process.
(Also I don't see the point of popd since the shell exits at that point and whatever directory it was running in is lost)
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It's common for users of multitool to want to run tools in the current working directory. In #26, @alexeagle documented a technique we've used for a while with creating a script and symlinking to it. Our internal copy of this script is a bit more complicated to help avoid expensive calls to Bazel that simple
bazel runcalls don't really need. More refinements have been proposed in #27. All of these things are fundamentally workarounds for bazelbuild/bazel#3325.To help simplify things, this PR adds a convenience wrapper that captures the execpath, switches to $BUILD_WORKING_DIRECTORY, and then runs the desired tool. The resulting shell script gets to use a very simple
bazel run, should be compatible across any slew of Bazel options, and cache as well as any typical run target.