Pass default_shell_env through actions #502
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So I was thinking of an alternative -- instead of trying to merge in the configuration's default shell env, what if we used |
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Use which |
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ah, I think piping that through would probably be a bit more difficult than this. I'm not sure we want to compete with bazel's logic for this |
Through the investigation of bazelbuild/bazel#12049 one of the things I discovered was that when using `actions.run` there are 2 options for environment variables. `use_default_shell_env = True` is recommended, but cannot be used if you want to also pass `env` to the actions. To support Xcode version selection we have to pass `env` with those variables. Without the default shell env, we only get the environment variables defined in the crosstool, but not those passed with `--action_env`. This now adds variables passed as `--action_env=FOO=BAR`, but not those passed as `--action_env=FOO` (where the value is supposed to pass through). This is useful to ensure a few things: 1. The default PATH things are executed with includes /usr/local/bin. This can result in pollution of binaries from homebrew. Previously there was no way to limit this 2. This should be a good replacement for using custom Swift toolchains. Currently those environment variables only apply to some actions (excluding those from bazel) using `--action_env=TOOLCHAINS=foo` should work better than the current solution (this change can be made as a followup)
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FYI: I've been using this with |
brentleyjones
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Jun 4, 2021
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Through the investigation of
bazelbuild/bazel#12049 one of the things I
discovered was that when using
actions.runthere are 2 options forenvironment variables.
use_default_shell_env = Trueis recommended,but cannot be used if you want to also pass
envto the actions. Tosupport Xcode version selection we have to pass
envwith thosevariables. Without the default shell env, we only get the environment
variables defined in the crosstool, but not those passed with
--action_env. This now adds variables passed as--action_env=FOO=BAR, but not those passed as--action_env=FOO(where the value is supposed to pass through).
This is useful to ensure a few things:
This can result in pollution of binaries from homebrew. Previously
there was no way to limit this
Currently those environment variables only apply to some actions
(excluding those from bazel) using
--action_env=TOOLCHAINS=fooshould work better than the current solution (this change can be made
as a followup)