Given ANY GitHub repository url string like:
git://github.com/some-user/my-repo.git or
[email protected]:some-user/my-repo.git or
https://github.com/some-user/my-repo.git What is the best way in bash to extract the repository name my-repo from any of the following strings? The solution MUST work for all types of urls specified above.
Thanks.
github
$ url=git://github.com/some-user/my-repo.git $ basename=$(basename $url) $ echo $basename my-repo.git $ filename=${basename%.*} $ echo $filename my-repo $ extension=${basename##*.} $ echo $extension git 
echo $(basename "$url" ".${url##*.}"). I'd go with basename $URL .git.
Old post, but I faced the same problem recently.
The regex ^(https|git)(:\/\/|@)([^\/:]+)[\/:]([^\/:]+)\/(.+).git$ works for the three types of URL.
#!/bin/bash # url="git://github.com/some-user/my-repo.git" # url="https://github.com/some-user/my-repo.git" url="[email protected]:some-user/my-repo.git" re="^(https|git)(:\/\/|@)([^\/:]+)[\/:]([^\/:]+)\/(.+)(.git)*$" if [[ $url =~ $re ]]; then protocol=${BASH_REMATCH[1]} separator=${BASH_REMATCH[2]} hostname=${BASH_REMATCH[3]} user=${BASH_REMATCH[4]} repo=${BASH_REMATCH[5]} fi Explaination (see it in action on regex101):
^ matches the start of a string(https|git) matches and captures the characters https or git(:\/\/|@) matches and captures the characters :// or @([^\/:]+) matches and captures one character or more that is not / nor :[\/:] matches one character that is / or :([^\/:]+) matches and captures one character or more that is not / nor :, yet again[\/:] matches the character /(.+) matches and captures one character or more(.git)* matches optional .git suffix at the end$ matches the end of a stringThis if far from perfect, as something like [email protected]:some-user/my-repo.git would match, but I think it's fine enough for extraction.
.git at the end. ^((https?|ssh|git|ftps?):\/\/)?(([^\/@]+)@)?([^\/:]+)[\/:]([^\/:]+)\/(.+).git\/?$, which better matches the official spec for URLs. Group 2 is the scheme, if missing the default is ssh. ^((?<protocol>https?|ssh|git|ftps?):\/\/)?((?<user>[^\/@]+)@)?(?<hostname>[^\/:]+)[\/:](?<pathHead>[^\/:]+)\/(?<pathTail>(.+)(.git)?\/?)$, testable here: regex101.com/r/NtqNET/1 Summing up:
Get url without (optional) suffix:
url_without_suffix="${url%.*}" Get repository name:
reponame="$(basename "${url_without_suffix}")" Get user (host) name afterwards:
hostname="$(basename "${url_without_suffix%/${reponame}}")" use regular expression: /([^/]+)\.git$/
basename $git_repo_url | tr -d ".git" basename is my favorite, but you can also use sed:
url=git://github.com/some-user/my-repo.git reponame="$(echo $url | sed -r 's/.+\/([^.]+)(\.git)?/\1/')" # reponame = "my-repo" "sed" will delete all text until the last / + the .git extension (if exists), and will retain the match of group \1 which is everything except dot ([^.]+)
Using Hitcham's awesome answer above allowed me to come up with this, using sed to output exactly what needed: org/reponame with sed.
output = echo ${git_url} | sed -nr 's/^(https|git)(:\/\/|@)([^\/:]+)[\/:]([^\/:]+)\/(.+).git$$/\4\/\3/p'` Works well in ubuntu, doesn't work for the sed available by default on macosx.
A slight modification to @Hicham's answer
^(https|git)(:\/\/|@)([^\/:]+)[\/:]([^\/:]+)\/(.+?)(\.git)?$
Will extract out the .git suffix as well.
After fiddling half a day in regex101 and using input from @womble and the others.. I came up with this, which also has the capture names to denote what is handled where.. It may help even me in the neer future :P
/^((?<protocol>https?|ssh|git|ftps?):\/\/)?((?<user>[^\/@]+)@)?(?<host>[^\/:]+)[\/:](?<port>[^\/:]+)\/(?<path>.+\/)?(?<repo>.+?)(?<suffix>\.git[\/]?)?$/ it basically allows to use the repo name (see part ?) in a
.../reponame.git, .../reponame.git/, .../reponame and .../reponame/
repo url, as it handles the optional .git
