[feature req] choose print text between or after matches about choose

[theryangeary]

hey @daniejstriata, this is an interesting idea. I think that you can already do this. Take a look at these examples (based on your examples):

$ echo 'Version:         v5.20.0' | choose -f 'Version:\s+' 0
v5.20.0

You could also replace the 0 with : here. The same solution applies to the openssl example.

> echo '                "Source": "/etc/dockers/conf/web/tls",' | choose -f '("Source": "|tls)' 1
/etc/dockers/conf/web/

Using regex field separators with an or condition (|) lets you effectively set a beginning and end. Assuming the text only appears once in a line, the content between the start and end will always be index 1.

So returning to the string1/string2 examples at the top of your comment, the line lorem ipsum string1 dolor sit string2 amet can be split with choose -f '(string1|string2)', to select the text between the separators, or choose -f 'string1' to select the text after the separator. I believe this addresses the lower case -m, -a proposal.

Admittedly, this does not solve your suggested case of including the start and end strings, but I see no reason not to use grep "string1.*string2" or grep "string1.*" for that case. Then you can use choose -c` to select characters within that. This should address the upper case -M, -A proposal.

Based on these alternatives, I don't think any further change is needed to support your usecase. However, I'd be interested to hear if you feel differently and have more examples.