CODEWITHSUNDEEP
ruby-on-railsregex
Sajjad Umar
Sajjad Umar

Reputation: 141

Rails regex for specific pattern

I need to grab the first occurrence of this pattern [some-file-name ci] OR [some-file-name-ci.yml ci]

So far I'm able to create this pattern

CONFIG_FILE_PATTERN = /\[(\w*[ _-]ci|\w*[ _-]*\.yml ci|.\w*[ _-]*\.yml ci|.\w*[-_]\w*[ _-]*\.yml ci|\w*[-_]\w*[ _-]*\.yml ci|\w*[-_]\w*[ _-]*\w ci|.\w*[-_]\w*[ _-]*\w ci)\]/i.freeze

This works fine for all cases except when there are multiple hyphens (-) in the file name.

Examples:

[hello-ci.yml ci] # works fine for this
[hello.yml ci] # works fine for this
[hello ci] # works fine for this
[hello-world-ci.yml ci] # does not work for this as the file name now have multiple hyphens

Any help will be appreciated.

Upvotes: 1

Views: 60

Answers (1)

Wiktor Stribiżew
Wiktor Stribiżew

Reputation: 627468

You may use

/\[([^\]\[]*[ _-]ci)\]/i

See the Rubular demo

Details

  • \[ - a [ char
  • ([^\]\[]*[ _-]ci) - Group 1:
    • [^\]\[]* - 0+ chars other than [ and ]
    • [ _-] - a space, _ or -
    • ci - a ci substring
  • \] - a ] char.

A Ruby test at IDEONE to extract the first occurrence:

s = '[hello-ci.yml ci] works fine for this [second-DONT-EXTRACT-hello-ci.yml ci]'
puts s[/\[([^\]\[]*[ _-]ci)\]/i, 1] # => hello-ci.yml ci

Upvotes: 1

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