savestdout is a small tool to save the stdout of a command to a file, without using a shell.
It was made to be used in Bazel rule definitions that want to run a command and save its output to stdout without going through ctx.actions.run_shell.
Once bazelbuild/bazel/issues/5511 gets fixed, rules that need this behaviour can start using native Bazel functionality instead, and this tool should be deleted.
Command line usage:
bazel build //build/savestdout bazel run bazel-bin/build/savestdout/*/savestdout /tmp/foo ps aux
For an example of use in rules, see smalltown_initramfs in //code/def.bzl.