Match a string in multiline string while excluding special characters

Question

I have a yaml template with content like that:

Example 1:

- key: MY_KEY 
  value: "{{ $MY_VAL }}"

Example 2:

- key: MY_KEY 
  value: "$MY_VAL"

Example 3:

- key: MY_KEY 
  value: '$MY_VAL'

Example 4:

- key: MY_KEY 
  value: 'MY_VAL'

I want to match with regex MY_VAL incase of MY_KEY with new line (\r\n) then MY_VAL, but just incase it's not any kind of variable and it's a real value (e.g alphanumeric).

In the above Example 1 & Example 2 & Example 3 => I want it will return no match.

In Example 4 I want it will return there is a match.

I tried this regex with no success (IMHO I thought it will work, but it's not):

MY_KEY[\r\n]+[^${}].[\w].([^\r\n]+)

I follow that question of multiline regex, but it's not help in this case:

https://stackoverflow.com/a/37526464

Please help :D

You can't match and remove text with one matching operation. You need to first extract, then remove what you do not want. — Wiktor Stribiżew, Jun 16 '20 at 11:06
@WiktorStribiżew thanks for answer. I didn't asked for remove, just regex pattern who will return NoMatch for Example 1,2,3 and Match for Example 4 — John McClane, Jun 16 '20 at 12:44
Hm, then try `MY_KEY[^\S\r\n]*[\r\n]+[^\S\r\n]*\w+:[^\S\r\n]*'(\w+)'`. See [regex demo](https://regex101.com/r/t03AGv/1). — Wiktor Stribiżew, Jun 16 '20 at 15:18

score 0 · Accepted Answer · answered Jun 16 '20 at 18:02

You may use

MY_KEY[^\S\r\n]*[\r\n]+[^\S\r\n]*\w+:[^\S\r\n]*'(\w+)'

See the regex demo

Details

MY_KEY - a literal string
[^\S\r\n]* - 0 or more whitespace chars other than CR and LF
[\r\n]+ - one or more CR or LF chars
[^\S\r\n]* - 0 or more whitespace chars other than CR and LF
\w+ - one or word chars
: - a colon
[^\S\r\n]* - 0 or more whitespace chars other than CR and LF
'(\w+)' - ', 1+ word chars, '.

Match a string in multiline string while excluding special characters

1 Answers1