git-check-unpushed

#!/bin/bash -e
## Check for unpushed commits in remote tracking branches
## if argument -p is given: does not exit with a failure

## read input, display help if necessary
if [[ "$@" == *--help* ]]; then
    cat<<EOF
 Check for unpushed commits in tracking branches

 This command checks for unpushed commits in tracking branches. 
 This is part of a series of checks used to determine whether it is 
 safe to remove a submodule.

 Usage:
    git check-unpushed [-p]

    -p: do not raise an error
EOF
    exit 0;
fi

while getopts ":p" opt; do
    case $opt in
	p)
	    p=1
	    #echo "-p was triggered!" >&2
	    ;;
	\?)
	    # ignore this
	    #echo "Invalid option: -$OPTARG" >&2
	    ;;
  esac
done

## from the git mailinglist:
function git
{
    LC_MESSAGES=C command git "$@"
} 
export git

## cycle all branches
tmp=`git branch --no-color -vv 2> /dev/null`
while read line; do
    ##echo "$line"
    branch=`expr "$line" : '\** *\([^ ]*\)'`
    ##echo "$branch"
    remote=`expr "$line" : '.*\[\(.*\)\]'` || continue
    ##echo "$remote"
    ## if we're ahead: branch will show it after ":" 
    status=`expr "$remote" : '.*: ahead \(.*\)'` || continue
    ##echo "$status"
    unpushed="$unpushed    Branch \"$branch\" is ahead $status commit(s).
"
done <<< "$tmp"

if [ "$unpushed" ]; then
    if [[ $p -ne 1 ]]; then
	echo >&2 -n "Error in $PWD:
$unpushed"
	exit 1
    fi
    echo -n " In $PWD:
$unpushed"
fi