#!/bin/sh

# Determine which, if any, version control system the current directory
# is under.

# Look in this directory only

if [ -d SCCS ]; then echo "sccs"; exit 0; fi
if [ -d RCS ]; then echo "rcs"; exit 0; fi
if [ -d CVS ]; then echo "cvs"; exit 0; fi
if [ -d .svn ]; then echo "svn"; exit 0; fi

# Look in parent directories too

DIRS=""
function updirs {
    cd $1
    cur=`pwd`
    if [ "x$cur" != "x/" ]; then
        DIRS="$DIRS $cur"
        updirs ..
    fi
}
updirs .
DIRS="$DIRS /"

for dir in $DIRS; do
    cd $dir # $
    if [ -d ".git" ]; then echo "git"; exit 0; fi
    if [ -d ".bzr" ]; then echo "bzr"; exit 0; fi
    if [ -d ".hg" ]; then echo "hg"; exit 0; fi
    if [ -d "_darcs" ]; then echo "darcs"; exit 0; fi
done

echo "unknown"
exit 1