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docs: add a regex compatible with Bash #724

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docs: add a regex compatible with Bash #724

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b601088
docs: add a regex compatible with Bash
dunglas Jul 12, 2021
66ee767
chore: add link to Regex101
dunglas Dec 5, 2021
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12 changes: 10 additions & 2 deletions semver.md
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Original file line number Diff line number Diff line change
Expand Up @@ -336,7 +336,7 @@ name and the semantic version is "1.2.3".

### Is there a suggested regular expression (RegEx) to check a SemVer string?

There are two. One with named groups for those systems that support them
There are three. One with named groups for those systems that support them
(PCRE [Perl Compatible Regular Expressions, i.e. Perl, PHP and R], Python
and Go).

Expand All @@ -346,7 +346,7 @@ See: <https://regex101.com/r/Ly7O1x/3/>
^(?P<major>0|[1-9]\d*)\.(?P<minor>0|[1-9]\d*)\.(?P<patch>0|[1-9]\d*)(?:-(?P<prerelease>(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+(?P<buildmetadata>[0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$
```

And one with numbered capture groups instead (so cg1 = major, cg2 = minor,
One with numbered capture groups instead (so cg1 = major, cg2 = minor,
cg3 = patch, cg4 = prerelease and cg5 = buildmetadata) that is compatible
with ECMA Script (JavaScript), PCRE (Perl Compatible Regular Expressions,
i.e. Perl, PHP and R), Python and Go.
Expand All @@ -357,6 +357,14 @@ See: <https://regex101.com/r/vkijKf/1/>
^(0|[1-9]\d*)\.(0|[1-9]\d*)\.(0|[1-9]\d*)(?:-((?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*)(?:\.(?:0|[1-9]\d*|\d*[a-zA-Z-][0-9a-zA-Z-]*))*))?(?:\+([0-9a-zA-Z-]+(?:\.[0-9a-zA-Z-]+)*))?$
```

One that is compatible with Bash:

See: <https://regex101.com/r/yPKUVq/1>

```
^(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)\.(0|[1-9][0-9]*)(-((0|[1-9][0-9]*|[0-9]*[a-zA-Z-][0-9a-zA-Z-]*)(\.(0|[1-9][0-9]*|[0-9]*[a-zA-Z-][0-9a-zA-Z-]*))*))?(\+([0-9a-zA-Z-]+(\.[0-9a-zA-Z-]+)*))?$
```

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