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Justin
Asked: 2012-08-14 19:54:55 +0800 CST

Extract repository name from GitHub url in bash

  • 772

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.

bash

8 Answers

  1. Best Answer
    $ 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
    • 23

  2. I'd go with basename $URL .git.

    • 19

  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="[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 string

    This 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.

    • 13

  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}}")"
    • 6

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

    • 1 
  6. basename $git_repo_url | tr -d ".git"
    • 0

  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 ([^.]+)

    • 0

  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.

    • 0