git log - Get list of tasks numbers from git log based on message -

task number = jira issue number = **** (e.g.: 7600)

let's suppose have list of commits having following messages:

prj-7600 - first message prj-8283 - second message prj-8283 - third message prj-1001 - fourth message prj-8283 - fifth message prj-7600 - sixth message 

where first 1 oldest commit.

wanted output:

1001 7600 8283 

i listed commits using following command:

git log --author="first last" --oneline --grep=prj --pretty=format:"%s" | sort 

where

• committer = author (in case)
• --grep=prj specified ignore comments automatically generated ("merge branch ...") (alternative --no-merges)
• --pretty=format:"%s" shows message (removes hash)

actual output:

prj-1001 - fourth message prj-7600 - first message prj-7600 - sixth message prj-8283 - fifth message prj-8283 - second message prj-8283 - third message 

is possible extract numbers (probably using regex or substring) showing them once?

details:

• windows 7
• git 1.9.5 (msysgit) -> used cmd, not git bash console

this in either bash or git bash:

git log --author="first last" --oneline --grep=prj --pretty=format:"%s" | sort | cut --delimiter='-' --fields=2 | uniq 

so building on first section posted in question, is:

| cut --delimiter='-' --fields=2 | uniq 

this pipes sorted output cut extracts 2nd field delimited hyphen "-" , result pipes uniq display distinct values.

this solution has weakness in form of delimiter used cut - if format of log message changes, may break. better solution use regex search (instead of cut) issue key ("/prj-.+\s/" think...) , output number part.

edit

so after bit of digging, possible little more reliably using grep find item key (prj in case):

git log ... | grep -op --regexp="prj-\k\d+" | uniq 

-o tells grep output matched part of line
-p use pcre (perl/php) flavour of regex, enabling use the
\k option causes matches prior (to point) excluded