What is the default stash jira key pattern doing?

By default, Jira is started with the following value for the stash.jira.key.pattern argument:

((?<!([A-Z]{1,10})-?)[A-Z]+-\d+)

To ignore case, I was thinking of changing this to:

\b(\p{Alpha}+-\p{Digit}+)\b

Here I have omitted the negative lookbehind term:

([A-Z]{1,10})-?)

I know I could just include it or modify it in a simlar way:

((?<!(\p{Alpha}{1,10})-?)\p{Alpha}+-\p{Digit}+)

But what am I losing by not including it?

1 answer

1 accepted

1 vote

Hi Ken,

The negative lookbehind is used to make the JIRA key matching a bit stricter. Specifically, it ensures that things like Crucible review keys (e.g CR-FE-1234) and Bamboo builds (e.g. STASH-MASTER-1234) are not matched. If you leave it off, you'll probably get a few more false positives.

Cheers,

Michael

I can see that case but what does making the first dash optional acheive? And why is it captured? That is, why is the term:

([A-Z]{1,10})-?)

and not:

[A-Z]{1,10}-

Or, for that matter, why not just the dash, so that the expression becomes:

((?<!-)[A-Z]+-\d+)

Okay. The original is not looking for a word boundary like I was going to do. I am going to try:
\b(?<!-)(\p{Alpha}+-\p{Digit}+)(?!-)\b

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