#!/bin/bash

. /etc/shlib

include common
include pretty


devdir=/srv/git-bzr-mirrors
conf_file="/etc/git-bzr-syncs/git-bzr-syncs.conf"

if ! [ -f "$conf_file" ]; then
    print_error "No config file found in '$conf_file'."
fi


modules_branch=$(cat "$conf_file" | egrep -v ^\s*# | egrep -v ^\$)

## get branch from bzr_branch
function get_bzr_remote_branch() {
    git config -l | grep "^bzr\.bzr/.*\.upstream=$1$" |
               sed -r "s,^bzr\.(bzr/.*)\.upstream=.*$,\1,"
   
}

function get_bzr_local_branch() {
   git config -l | grep "^bzr\..*\.bzr=$1" |
                 sed -r "s,^bzr\.(.*)\.bzr=.*$,\1,g" |
   ## This is because git-bzr-ng do not support "/" in branches names
                 grep -v "/" |
                 head -n 1
}

function get_current_branch() {
   local branch
   branch=$(git symbolic-ref HEAD)
   echo "${branch#refs/heads/}"
}

function git_pull_remote_bzr() {
   Wrap git checkout "$1" && 
   Wrap git bzr sync &&
   Wrap git merge --ff-only "$2" || exit 1
   ## remove bogus tags
   export bogus_tags=$(git tag -l | grep ^openerp-build)
   Wrap -d "delete $(echo "$bogus_tags" | wc -l ) bogus tags" 'echo "$bogus_tags" | xargs -n 20 git tag -d ' || exit 1
}

function get_bzr_official_branch() {

   git config -l | grep "^branch\..*\.follow-git-bzr=$1$" |
                 sed -r "s,^branch\.(.*)\.follow-git-bzr=.*$,\1,g" |
   ## This is because git-bzr-ng do not support "/" in branches names
                 head -n 1
:
}

function git_update_official() {
    update_to=$(git config branch.$1.follow-git-bzr)

    ## XXXvlab: this should be better but current git version is not
    ## supporting "-B"
    #Wrap git checkout -B "$1" "$update_to"

   if git branch "$1" >/dev/null 2>&1 ; then
      Elt "Created branch $YELLOW$1$NORMAL"; Feed
   fi
   Wrap git checkout "$1" && 
   Wrap git reset --hard "$update_to" || exit 1
}

if [ "$1" ]; then
   modules_branch=$(echo "$modules_branch" | grep "^$1=")
fi

for line in $modules_branch; do
    dir=$(echo "$line" | cut -f 1 -d "=")
    bzr_branches=$(echo "$line" | cut -f 2- -d "=" | tr "," "\n")
    Title Repository $YELLOW$dir$NORMAL
    for bzr_branch in $bzr_branches; do
       if ! [ -d "$devdir/$dir" ]; then
           echo "  You must clone your git repository in $devdir/$dir."
           echo
           echo "      git clone GIT_REPO_URL $devdir/$dir"
           echo "   OR git bzr clone GIT_REPO_URL $devdir/$dir"
           echo
           print_error "No repository found in $devdir/$dir."
       fi
       cd "$devdir/$dir"
       git_bzr_remote_branch="$(get_bzr_remote_branch $bzr_branch)"
       if [ -z "$git_bzr_remote_branch" ]; then
           echo "  You must do the first 'git bzr' import yourself:"
           echo
           echo "      git bzr import lp:LP_BRANCH LOCAL_BZR_BRANCH"
           echo
           echo "  ie: git bzr import lp:openobject-addons/7.0 openobject-addons-7.0" 
           echo
           print_error "bzr branch $bzr_branch was not configured in $dir repository."
       fi
       #echo "  BZR REMOTE: $git_bzr_remote_branch"
       git_bzr_local_branch="$(get_bzr_local_branch $git_bzr_remote_branch)"

       if [ -z "$git_bzr_local_branch" ]; then
           print_error "git bzr remote branch $git_bzr_remote_branch was not linked to a branch in $dir repository."
       fi
       #echo "  BZR LOCAL: $git_bzr_local_branch"
       current_branch=$(get_current_branch)
       if [ "$(git diff)" ]; then
           print_error "Repository $dir is not clean."
       fi  
       git_bzr_official_branch="$(get_bzr_official_branch $git_bzr_local_branch)"

       if [ -z "$git_bzr_official_branch" ]; then  
           echo "  You must link $git_bzr_local_branch branch to the branch managed by 'git bzr'."
           echo
           echo "      git config branch.$git_bzr_local_branch.follow-git-bzr LOCAL_BZR_BRANCH"
           echo
           print_error "git bzr local branch $git_bzr_local_branch was not linked to an official branch in $dir repository."
       fi
       Section "sync branch $YELLOW$git_bzr_official_branch$NORMAL"
       Elt bzr branch: $YELLOW$bzr_branch$NORMAL ; Feed
       Elt git intermediary branch: $YELLOW$git_bzr_local_branch$NORMAL ; Feed
 
       git_pull_remote_bzr "$git_bzr_local_branch" "$git_bzr_remote_branch"
       git_update_official "$git_bzr_official_branch" 
       Wrap git push origin "$git_bzr_official_branch" || exit 1
       Wrap git push --tags || exit 1
    done
done