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Add --tag-parser-pattern & --tag-parser-replacement for unconventional tag coercion into valid semver. #222

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Description

This PR adds the ability to pass in a regex capture pattern and a replacement string in order for auto-changelog to properly include, validate, and sort custom tagging approaches.

Stories

  • auto-changelog has the --tag-prefix option to remove a non-semver string from tags but it cannot remove multiple invalid strings.
  • auto-changelog, when including invalid semver tags via --tag-pattern, cannot properly sort said tags in their semver order (e.g. v4.10.1@next appears before v4.2.0@next)

Changes

  • adds --tag-parser-pattern to allow user to supply a regex for capturing semver MAJOR.MINOR.PATCH[-pre-release.BUILD].
  • adds --tag-parser-replacement to allow user to replace the captured values and coerce the tag to valid semver.
  • refactors related code.

Proofs

yulolimum-capture-10-14-2021-tB3jqmkZ

Comment on lines +43 to +44
--tag-parser-pattern [regex] # pattern used to capture values in tags for replacement
--tag-parser-replacement [string] # replaces captures supplied in the --tag-parser-pattern option to create valid semver tags
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Documents option usage.

```

Note, both options need to be supplied for this to work. Also note, `$` signs in the replacement string must be escaped.

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Documents parsing strategies and their differences.

Comment on lines +47 to +48
.option('--tag-parser-pattern <regex>', 'pattern used to capture values in tags for replacement')
.option('--tag-parser-replacement <string>', 'replaces captures supplied in the --tag-parser-pattern option to create valid semver tags')
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Adds options to commander.

const [tag, date] = string.split(DIVIDER)
return {
tag,
date,
title: tag,
version: inferSemver(tag.replace(tagPrefix, ''))
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Moves the tagPrefix replacement logic into the inferSemver.

const inferSemver = (tag, { tagPrefix, tagParserPattern, tagParserReplacement }) => {
if (!!tagParserPattern && !!tagParserReplacement) {
return tag.replace(new RegExp(tagParserPattern), tagParserReplacement)
}
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Adds the logic for the pattern/replacement options.


if (!!tagPrefix && tag.startsWith(tagPrefix)) {
tag = tag.replace(new RegExp(`^${tagPrefix}`), '')
}
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Since we are removing the "prefix" via the tagPrefix option, actually check if the tag "starts with" the supply string and only remove it from the beginning.

'2.1.0-build.2355',
'0.1.0-build.2345'
])
})
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Adds test.

@cookpete
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cookpete commented Feb 3, 2022

This looks interesting but couldn’t the same be achieved with the existing --tag-pattern option and capture groups?

@yulolimum
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This looks interesting but couldn’t the same be achieved with the existing --tag-pattern option and capture groups?

@cookpete Good question!

From what I remember (it's been a while since I looked at the code), tagPattern is only used to validate whether the tag should be kept or rejected in the filter. What these options do, is they prepare the tag strings before the validation even runs. One could argue, "well why does that matter?" - the answer is semver sort order. If a tagPattern is used to pass the initial filtering for "invalid" semver tags, it doesn't mean that the tags will be sorted correctly using semver. Parsing the tags into the correct semver format will allow the sort to work as intended.

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2 participants