apps: include git describe
version string
#733
Merged
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Include a version string from
git describe
to use in --versionoutput, falling back on the crate version if no git repository is
found.
This doesn't actually work, because Cargo is bad and there's no way to force build.rs to rerun. Forcing it to rerun on .git changes might seem to work, but it doesn't - we may be in a worktree and .git may be a file pointing to the main repository. Better approaches welcome.