added support for environment variables in leiu of options #105
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Support for this PR was originally articulated by @marler8997 as a
// TODO
on line 83.This PR proposes a rather minor change to effectively extend the current functionality of the two existing CLI options (
--install-dir
and--path-link
) such that they now will automatically inherit their values from environment variables (ZIG_INSTALL_DIR
andZIG_PATH_LINK
, respectively). Documentation (via the help messagezigup -h
) was updated accordingly.