regex101: Conventional Commits validation

\Astart of string

Non-Capturing Group(?:(?:^(?P<type>feat|fix|ci|chore|docs|test|style|refactor|build|perf|revert)(?:$(?P<scope>[\w-]+)$)?(?P<breaking>!)?:\s(?P<subject>\b[\w#<> ./\t\\-]{3,}(?:\b|\.))$)(?:(?:(?P<BLANK_LINE>\n^$\n)(?P<body>(?:^.{3,}(?:\b|\.)$\n?){1,3}))?(?P<BLANK_LINE2>\n^$\n)(?:(?P<breaking_change>^BREAKING\sCHANGE:\s[\s\w]+(?:\b|\.)$)\n)?(?:(?P<footer>^\w+:\s[\w#-]+(?:\b|\.))))?\n?|)

1st Alternative(?:^(?P<type>feat|fix|ci|chore|docs|test|style|refactor|build|perf|revert)(?:$(?P<scope>[\w-]+)$)?(?P<breaking>!)?:\s(?P<subject>\b[\w#<> ./\t\\-]{3,}(?:\b|\.))$)(?:(?:(?P<BLANK_LINE>\n^$\n)(?P<body>(?:^.{3,}(?:\b|\.)$\n?){1,3}))?(?P<BLANK_LINE2>\n^$\n)(?:(?P<breaking_change>^BREAKING\sCHANGE:\s[\s\w]+(?:\b|\.)$)\n)?(?:(?P<footer>^\w+:\s[\w#-]+(?:\b|\.))))?\n?

Non-Capturing Group(?:^(?P<type>feat|fix|ci|chore|docs|test|style|refactor|build|perf|revert)(?:$(?P<scope>[\w-]+)$)?(?P<breaking>!)?:\s(?P<subject>\b[\w#<> ./\t\\-]{3,}(?:\b|\.))$)

^start of line

1st Alternativefeat

featthe literal text feat (case sensitive)

2nd Alternativefix

fixthe literal text fix (case sensitive)

3rd Alternativeci

cithe literal text ci (case sensitive)

4th Alternativechore

chorethe literal text chore (case sensitive)

5th Alternativedocs

docsthe literal text docs (case sensitive)

6th Alternativetest

testthe literal text test (case sensitive)

7th Alternativestyle

stylethe literal text style (case sensitive)

8th Alternativerefactor

refactorthe literal text refactor (case sensitive)

9th Alternativebuild

buildthe literal text build (case sensitive)

10th Alternativeperf

perfthe literal text perf (case sensitive)

11th Alternativerevert

revertthe literal text revert (case sensitive)

Non-Capturing Group(?:$(?P<scope>[\w-]+)$)?

?repeats the group contents below at most once:

\(the literal ( (40₁₀ / 50₈ / 28₁₆)

Group scope(?P<scope>[\w-]+)

Character Class[\w-]+

+matches at least one character from the set below:

\wa Unicode word character

-the literal - (45₁₀ / 55₈ / 2D₁₆)

\)the literal ) (41₁₀ / 51₈ / 29₁₆)

Group breaking(?P<breaking>!)?

?repeats the group contents below at most once:

!the literal ! (33₁₀ / 41₈ / 21₁₆)

:the literal : (58₁₀ / 72₈ / 3A₁₆)

\sa Unicode whitespace character

Group subject(?P<subject>\b[\w#<> ./\t\\-]{3,}(?:\b|\.))

\ba Unicode word boundary

Character Class[\w#<> ./\t\\-]{3,}

{3,}matches at least 3 characters from the set below:

\wa Unicode word character

#the literal # (35₁₀ / 43₈ / 23₁₆)

<the literal < (60₁₀ / 74₈ / 3C₁₆)

>the literal > (62₁₀ / 76₈ / 3E₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

.the literal . (46₁₀ / 56₈ / 2E₁₆)

/the literal / (47₁₀ / 57₈ / 2F₁₆)

\ta tab character (ASCII 9)

\\the literal \ (92₁₀ / 134₈ / 5C₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Non-Capturing Group(?:\b|\.)

1st Alternative\b

\ba Unicode word boundary

2nd Alternative\.

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

$end of line

Non-Capturing Group(?:(?:(?P<BLANK_LINE>\n^$\n)(?P<body>(?:^.{3,}(?:\b|\.)$\n?){1,3}))?(?P<BLANK_LINE2>\n^$\n)(?:(?P<breaking_change>^BREAKING\sCHANGE:\s[\s\w]+(?:\b|\.)$)\n)?(?:(?P<footer>^\w+:\s[\w#-]+(?:\b|\.))))?

?repeats the group contents below at most once:

Non-Capturing Group(?:(?P<BLANK_LINE>\n^$\n)(?P<body>(?:^.{3,}(?:\b|\.)$\n?){1,3}))?

Group BLANK_LINE2(?P<BLANK_LINE2>\n^$\n)

Non-Capturing Group(?:(?P<breaking_change>^BREAKING\sCHANGE:\s[\s\w]+(?:\b|\.)$)\n)?

Non-Capturing Group(?:(?P<footer>^\w+:\s[\w#-]+(?:\b|\.)))

\n?optionally matches a line-feed (newline) character (ASCII 10)

2nd Alternative — matches an empty string

\Zend of string, or before its final line terminator

Global pattern flags

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

u modifier: unicode. Makes \w, \W, \b, \B, \d, \D, \s, and \S use Unicode semantics (redundant in Python 3)

Search reference

Regular Expression

\A(?:(?:^(?P<type>feat|fix|ci|chore|docs|test|style|refactor|build|perf|revert)(?:\((?P<scope>[\w-]+)\))?(?P<breaking>!)?:\s(?P<subject>\b[\w#<> ./\t\\-]{3,}(?:\b|\.))$)(?:(?:(?P<BLANK_LINE>\n^$\n)(?P<body>(?:^.{3,}(?:\b|\.)$\n?){1,3}))?(?P<BLANK_LINE2>\n^$\n)(?:(?P<breaking_change>^BREAKING\sCHANGE:\s[\s\w]+(?:\b|\.)$)\n)?(?:(?P<footer>^\w+:\s[\w#-]+(?:\b|\.))))?\n?|)\Z

Regular Expressions 101

Regular Expression

Unit Tests