we were trying to find the username of a mercurial url:
default = ssh://[email protected]//srv/hg/repo
Suppose that there's always a username, I came up with:
tmp=${a#*//}
user=${tmp%%@*}
Is there a way to do this in one line?
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Does using a semi-colon between the two operations (instead of a newline) count?Jonathan Leffler– Jonathan Leffler2010-11-22 22:40:50 +00:00Commented Nov 22, 2010 at 22:40
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4 Answers
Assuming your string is in a variable like this:
url='default = ssh://[email protected]//srv/hg/repo'
You can do:
[[ $url =~ //([^@]*)@ ]]
Then your username is here:
echo ${BASH_REMATCH[1]}
This works in Bash versions 3.2 and higher.
answered Nov 22, 2010 at 21:28
Dennis Williamson
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You pretty much need more that one statement or to call out to external tools. I think sed is best for this.
sed -r -e 's|.*://(.*)@.*|\1|' <<< "$default"
2 Comments
Will
I don't remember seeing that construct before - the
<<< - so I just learned something new. Usually I echo the variable into sed; I would imagine this construct is more efficient?
sorpigal
I imagine it is, since an echo and a pipe means a whole 'nother subshell whereas a here string is handled in process.
Not within bash itself. You'd have to delegate to an external tool such as sed.
answered Nov 22, 2010 at 18:23
Ignacio Vazquez-Abrams
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Not familiar with mercurial, but using your url, you can do
echo 'ssh://[email protected]/srv/hg/repo' |grep -E --only-matching '\w+@' |cut --delimiter=\@ -f 1
Probably not the most efficient way with the two pipes, but works.
