CODEWITHSUNDEEP
regexruby
jseanj
jseanj

Reputation: 1559

regular expressions for finding multi lines

Full text:

def A
    pod 'Xyz', '0.1.0'
    pod 'zdb', '1.1.0+beta'
    pod 'Aero', '3.1.0'
end

def B
    A
    pod 'qq', '0.1.1'
    pod 'publ', '1.1.0'
end

I want a function, the input value would be 'A' or 'B', the return value would be the multi lines. The pod name's character may be anything.

For example, If I input 'A', the result would be

pod 'Xyz', '0.1.0'
pod 'zdb', '1.1.0+beta'
pod 'Aero', '3.1.0'

If I input 'B', the result would be

pod 'Xyz', '0.1.0'
pod 'zdb', '1.1.0+beta'
pod 'Aero', '3.1.0'
pod 'qq', '0.1.1'
pod 'publ', '1.1.0'

How can I match this text?

Upvotes: 0

Views: 67

Answers (1)

Anuj
Anuj

Reputation: 1665

It can be done using regex. I have not used ruby before so I will not be able to share any code. I did check few posts online to help me writing an answer.

Regex

"(?<=def [A-#{input}]\n)[^p]*(pod '.*?')(?=\nend)"gs

here #{input} is your input variable. Please note that the regex must be applied globally and in single line mode (dot matches new line character). You have to do that in ruby. As I already mentioned, I can not do it.

Output

I tried manually changing the input and testing it against your input string.

input 1:
A

match 1-group 1:
pod 'Xyz', '0.1.0'
    pod 'zdb', '1.1.0+beta'
    pod 'Aero', '3.1.0'


input 2:
B

match 1-group 1:
pod 'A-a', '0.1.0'
    pod 'A-b', '1.1.0'
    pod 'A-c', '3.1.0'

match 2-group 1:
pod 'B-a', '0.1.1'
    pod 'B-b', '1.1.0'

As you can see, if applied globally, all the lines you are interested in will be obtained in group 1 will some additional spaces which can always be eliminated.

Test link: https://regex101.com/r/AljaZP/1

Upvotes: 1

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