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Tests for bad branches based on presence of * and >.

Joins nested Eithers.

Parses NameLog into NameAuthDay, recording errors as ErrOr.

Intermediate parsing of NameLog into NameAuthDateStr, recording errors as ErrOr.

Intermediate parsing of NameAuthDateStr into NameAuthDay, recording errors as ErrOr.

Safely reads Text into ErrOr Int.

Determines if NameAuthDay is stale given by

stale lim day (_, _, d) <=> day - d >= lim

For Right NameAuthDay, behaves the same as stale. But for Left Err it is always true, since we do not want to filter out errors.

Strips whitespace and potential git prefix (i.e. remotes/). Works for strings with no prefix and those that have the prefix exactly once, e.g.

textToName "branch" -> branch
textToName "remotes/origin/branch" -> origin/branch
textToName "blah/remotes/origin/branch" -> origin/branch

Returns Left ParseName if the prefix occurs more than once as we have definitely entered undefined territory.

Unsafely reads Text to Int.