tree e0d24ad1acf54bc4ad85265cf5a8d4f62c2929a8
parent d603f84c6beffb9431f902eccf3f4b06b232a4fb
author Serge Bazanski <serge@nexantic.com> 1591726633 +0200
committer Serge Bazanski <serge@nexantic.com> 1591726633 +0200

core/cmd/mkimage: clean up

This cleans up a few minor issues with the mkimage tool:
 - error logging now goes to stderr; it going to stdout made my life
   painful when debugging a build failure as the output got mangled by
   Bazel
 - repeated actions (copies, mkdirs) are now expressed less verbosely
 - flags are now declared in a more canonical way
 - flags are now named in a more canonical way (underscores vs. hyphens;
   these haven't been used anywhere in the build, so we're not breaking
   anything).

Test Plan: Refactor, no change behaviour (apart from stderr logging).

X-Origin-Diff: phab/D558
GitOrigin-RevId: 2531562acc46ec7aa0a6ac89b883dfd45cddcf82