Extract repository name from GitHub url in bash

Question

Given ANY GitHub repository url string like:

git://github.com/some-user/my-repo.git

or

git@github.com: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.

Answer 1

$ 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

Answer 2

I'd go with basename $URL .git.

Answer 3

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="git@github.com: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 string

This if far from perfect, as something like https@github.com:some-user/my-repo.git would match, but I think it's fine enough for extraction.

Answer 4

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}}")"
  

Answer 5

use regular expression: /([^/]+)\.git$/

Answer 6

basename $git_repo_url | tr -d ".git"

Answer 7

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 ([^.]+)

Answer 8

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.

Answer 9

A slight modification to @Hicham's answer

^(https|git)(:\/\/|@)([^\/:]+)[\/:]([^\/:]+)\/(.+?)(\.git)?$

Will extract out the .git suffix as well.