Jira pre-receive hook on GitHub server not working for git commit pushes

Question

i just added the https://github.com/github/platform-samples/blob/master/pre-receive-hooks/require-jira-issue.sh

script to one of my github remote repos and was able to successfully configure a pre-receive hook at the org level and enabled it for one of my sample repos. Now when i push to that sample repo from local, it always results in the below error :-

remote: jira-commit-hook.sh: failed with exit status 1
remote: grep: Invalid range end
remote: ERROR
remote: ERROR: Your push was rejected because the commit
remote: ERROR: e9b0dd4695a51beb51e6fc1a8d16f01fa7dd13b8 in master
remote: ERROR: is missing the JIRA Issue
remote: ERROR:
remote: ERROR: Please fix the commit message and push again.
 ! [remote rejected] master -> master (pre-receive hook declined)
error: failed to push some refs to 'https://************'

The commit regex I'm using is msg_regex='[DST\\-[0-9]+\\]' since DST is the project key in our jira for one of the projects. All the commits i am pushing has the string DST-*** in their message where *** is a number and DST-*** is some actual issue key for the jira project here. Any idea why the remote server hook is rejecting the push. Looks like its not validating the regex. Any idea why?

Answer 1

- is a special character in regex when you use inside character class [] , it stands for range when it appears anywhere else except

• As the first character in class or after [^]
• At the end of character class

so your regex should be

DST-[0-9]+

Character Class

Answer 2

My guess based on your original expression,

[DST\-[0-9]+\]

is that maybe the desired expression would be

\[DST-[0-9]+\]

or maybe just,

DST-[0-9]+

not sure though. I'm positive that you may not need to escape the - in this case, since it is not in a char class, - is only a metachar inside a char class [] .