Regular Expressions 101

^start of line

Group compatibility(?<compatibility>[\S]*\d+\.\d+(?:\.\d+)?(?:[\S]*)?-alpine-?)

Character Class[\S]*

*matches any number of characters from the set below:

\Sany non-whitespace character

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.\d+)?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

\d+a digit, repeated at least once

Non-Capturing Group(?:[\S]*)?

?repeats the group contents below at most once:

Character Class[\S]*

*matches any number of characters from the set below:

\Sany non-whitespace character

-alpinethe literal text -alpine (case sensitive)

-?optionally matches the literal - (45₁₀ / 55₈ / 2D₁₆)

Group major(?<major>\d+)

\d+a digit, repeated at least once

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group minor(?<minor>\d+)

\d+a digit, repeated at least once

Non-Capturing Group(?:\.(?<patch>\d+))?

?repeats the group contents below at most once:

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group patch(?<patch>\d+)

\d+a digit, repeated at least once

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?<compatibility>[\S]*\d+\.\d+(?:\.\d+)?(?:[\S]*)?-alpine-?)(?<major>\d+)\.(?<minor>\d+)(?:\.(?<patch>\d+))?$

New

v2.12.0-alpine
20.10.21-alpine3.17
23.0.6-dind-alpine3.17
3.11.4-alpine3.17
7.3-alpine-3.17