pullreq - A bash function to make a pull request.

pullreq.sh

# Push your current branch to origin and open a pull request to upstream:$1 or upstream:master
pullreq()
{
    local browser=google-chrome # replace with your browser command
    local regex='(https?://|git://|git@)([a-zA-Z0-9\.]+)[:/]([a-zA-Z0-9]+)/(.+)?'
    local origin=$(git remote -v | grep origin | grep push | cut -f2 | cut -d' ' -f1)
    local upstream=$(git remote -v | grep upstream | grep fetch | cut -f2 | cut -d' ' -f1)
    local params=$(python -c "import sys;import re;print ':'.join(re.match('${regex}',sys.argv[1]).groups()[1:])" $origin)
    
    local site=$(echo $params | cut -d':' -f1)
    local user=$(echo $params | cut -d':' -f2)
    local repo=$(echo $params | cut -d':' -f3 | sed 's/\.git//')
    local branch=$(git branch | grep \* | cut -d' ' -f2)

    if [ ${upstream} = "" ]; then
      local uuser=user
    else
      local uparams=$(python -c "import sys;import re;print ':'.join(re.match('${regex}',sys.argv[1]).groups()[1:])" $upstream)
      local uuser=$(echo $uparams | cut -d':' -f2)
    fi

    if [ ${#@} -eq 1 ]; then
      local tobranch=${1};
    else
      local tobranch="master";
    fi

    git push origin ${branch}
    ${browser} http://${site}/${user}/${repo}/pull/new/${uuser}:${tobranch}...${branch}
}

Usage example:

git commit -a -m "A new update"
pullreq
# or
pullreq 1.0.1 # a different branch