entomologist/dd20d3ddc86ee802fe7b15e2c91dc160/comments/9c4dc8aa38ba0a9a6f3fbc014b05f7ba/description

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There are `entomologist-data` branches "in the wild" that have issues
with tags files, so we need to migrate those somehow.
We discussed a couple of ways to do this:
1. Have the ent library do it automatically and transparently when it
comes across an old-style tags file. In `Issue::new_from_dir()` we'd
detect the old format, parse it, then immediately delete the file,
write the new format directory, and commit the result.
This is good:
- It's easy for the human
This is bad:
- entomologist will need to carry along this crufty code until we
think there are no more old-style repos in existence
2. Make a stand-alone tool (like the `set-done-time` tool in
<https://git.glyphs.tech/taproot-manufacturing/entomologist/pulls/27>.
The ent binary does *not* know how to read the old tags file, and will
error out if it comes across an issue with such a file. The human
would then manually run the tags-representation updater tool.
This tool would make the git worktree, walk the issues, find the
old-style tags, rewrite them in the new format, and commit the result.
This is good:
- Keeps the core entomologist code clean and "modern".
This is bad:
- This tool does manual/direct manipulation of the on-disk format,
which means it duplicates a lot of what the entomologist library
does.