## vcs_functions
# This file contains a handful of functions that relate to using some version
# control tool or other.

function ezsvnsync() {
    if [ x"$1" = "x" ] ; then
        echo 'usage: ez-svn-sync repo url'
        return 0
    fi
    local repo
    repo=$1
    local url
    url=$2
    svnadmin create $repo
    echo '#!/bin/sh' >> $repo/hooks/pre-revprop-change
    echo 'exit 0' >> $repo/hooks/pre-revprop-change
    chmod +x $repo/hooks/pre-revprop-change
    svnsync init file://`pwd`/$repo $url
    svnsync sync file://`pwd`/$repo
}
alias ez-svn-sync=ezsvnsync

# Function to grab the url of an svn wc
function svnurlof() {
    local url
    url=`svn info $1 2> /dev/null | grep '^URL: ' | sed 's/URL: //'`
    if [ x"$url" = "x" ] ; then
        url=`git svn info $1 2> /dev/null | grep '^URL: ' | sed 's/URL: //'`
    fi
    if [ x"$url" = "x" ] ; then
        local dir
        dir=$1
        if [ x"$dir" = "x" ] ; then
                dir="."
        fi
        url=`hg -R $dir svn info 2> /dev/null | grep '^URL: ' | sed 's/URL: //'`
    fi
    if [ x"$url" = "x" ] ; then
        echo -n 'No repo found (tried svn, git-svn, hgsubversion)'
    fi
    echo $url
}

# Function to clean locks out of svn wcs
function clean_svn_source_trees() {
    for aa in */ ; do
        pushd $aa > /dev/null
        if [ -e .svn ] ; then
            echo $aa 'is an svn checkout, cleaning' && svn cleanup
        fi
        popd  > /dev/null
    done
}

# Function to update source trees of known VCS tools in the working dir.
# "known" means ones I'm forced to use on a regular basis
function update_source_trees() {
    if ! ls -l | egrep ^d > /dev/null ; then
        ls -l | egrep ^d
        return
    fi
    local hgpath
    for aa in */ ; do
        pushd $aa > /dev/null || continue
        if [ -e .svn ] ; then
            echo $aa 'is an svn checkout, updating'
            svn up
        elif [ -e README.txt ] \
            && [ -e format ] \
            && grep "This is a Subversion repository; use the 'svnadmin' tool to examine" README.txt > /dev/null \
            && svn pl --revprop -r 0 file://$(pwd) | fgrep svn:sync-from-url  > /dev/null\
            ; then
            echo "$aa looks like an svnsync clone, syncing"
            svnsync sync file://$(pwd)
        elif [ -e .git/svn ] ; then
            echo $aa 'is a git-svn checkout, updating'
            git svn fetch
        elif [ -e .git ] ; then
            echo $aa 'is a git checkout, updating'
            for remote in $(git remote) ; do
                git fetch $remote
            done
        elif [ -e .hg ] ; then
            echo $aa 'is an hg checkout, updating'
            for hgpath in $(HGRCPATH=/dev/null hg paths | sed 's/.* = //g' | sort | uniq ) ; do
                hg pull --update $hgpath
            done
            if [ -e .hg/patches/.hg ] ; then
               echo $aa 'has an mq, updating that too...'
               hg -R .hg/patches pull -u
            fi
        elif [ -e _MTN ] ; then
            echo $aa "is an mtn co, updating" && mtn pull && mtn up
        else
            update_source_trees
        fi
        popd > /dev/null
    done
}
alias update-source-trees=update_source_trees

function vcs_current_branch() {
   git branch 2> /dev/null > /dev/null
    if [ $? = 0 ] ; then
        git branch --verbose | grep '^*' | sed 's/* //;s/ /:/;s/ .*//;s/:/ /'
        return 0
    fi
    # when wc-ng comes out, we'll probably do the following
    # svn info 2> /dev/null > /dev/null
    if [ -e .svn ] ; then
        local d=`svn info | grep URL | sed 's/.*://'`
        local br=`echo $d | awk '{
                        if ( index($1, "trunk") ) {
                            print  "trunk"
                        } else {
                            x = index($1, "branches") ;
                            if ( x != 0 ) {
                                sub(".*/branches/", "");
                                sub("/.*", "");
                                print $0
                            }
                        }
                    }'`
        local rev=`svn info | grep Revision | sed 's/.*: /r/'`
        echo $br $rev
        return 0
    fi
    hg branch 2> /dev/null > /dev/null
    if [ $? = 0 ] ; then
        local br=`hg branch | head -c 10`
        local rid=`hg parents --template '{node}\n' | head -n 1 | head -c 7`
        echo "$br $rid"
        return 0
    fi
    return 1
}

function find_dvcs_root() {
  local hgroot=`hg root 2> /dev/null`
  local gitroot=$(git rev-parse --show-toplevel 2> /dev/null)
  local hglen=$(expr length $hgroot)
  local gitlen=$(expr length $gitroot)
  if [ $hglen -ge $gitlen ] ; then
    if [ -n "$hgroot" ] ; then
      echo $hgroot
      return 0
    fi
  else
    if [ -n "$gitroot" ] ; then
      echo $gitroot
      return 0
    fi
  fi
  return 1
}

# change to the root dir of the current wc
function wcroot() {
    local dvcsroot=$(find_dvcs_root)
    if [ -n $dvcsroot ] ; then
        cd $dvcsroot
        return 0
    fi
    if [ -e .svn ] ; then
        while [ -e ../.svn ] ; do
            cd ..
        done
        return 0
    fi
    echo No working copy found'!'
}
