Regular Expressions 101

^start of line

exmpl-the literal text exmpl- (case sensitive)

Group type(?P<type>main|staging|demo|production)

1st Alternativemain

mainthe literal text main (case sensitive)

2nd Alternativestaging

stagingthe literal text staging (case sensitive)

3rd Alternativedemo

demothe literal text demo (case sensitive)

4th Alternativeproduction

productionthe literal text production (case sensitive)

Non-Capturing Group(?:-(?P<case>\d+|main))?

?repeats the group contents below at most once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group case(?P<case>\d+|main)

1st Alternative\d+

\d+a Unicode decimal digit, repeated at least once

2nd Alternativemain

mainthe literal text main (case sensitive)

Non-Capturing Group(?:-(?P<title>(?!e2e-\d+).+?))?

?repeats the group contents below at most once:

-the literal - (45₁₀ / 55₈ / 2D₁₆)

Group title(?P<title>(?!e2e-\d+).+?)

Negative Lookahead(?!e2e-\d+)

e2e-the literal text e2e- (case sensitive)

\d+a Unicode decimal digit, repeated at least once

.+?any Unicode character (except for line terminators), repeated at least once

Non-Capturing Group(?:-e2e-(?P<timestamp>\d+))?

?repeats the group contents below at most once:

-e2e-the literal text -e2e- (case sensitive)

Group timestamp(?P<timestamp>\d+)

\d+a Unicode decimal 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

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Search reference

Regular Expression

^exmpl-(?P<type>main|staging|demo|production)(?:-(?P<case>\d+|main))?(?:-(?P<title>(?!e2e-\d+).+?))?(?:-e2e-(?P<timestamp>\d+))?$

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