scripts/switch_all_submodules_to_head_and_clean

#!/bin/bash

# echo in bold
echobd () {
    if [ -p /dev/stdout ]; then
        echo "$1"
    else
        echo -ne "\033[1m"
        echo -n "$1"
        echo -e "\033[0m"
    fi
}

# verify git directory and branch
if [[ ! -e .git ]] &&
   [[ -z "`git rev-parse --git-dir 2>/dev/null`" ]]; then
	echo "Current directory does not contain a .git folder.  Exiting..."
	exit 1
fi

branch=`git symbolic-ref -q HEAD | sed "s|^refs/heads/||"`
if [[ -z "$branch" ]]; then
    branch=`git branch --contains HEAD | egrep -v "no branch|detached" | head -n1 | cut -c 3-`
fi
if [[ -z "$branch" ]]; then
	echo "There is not active branch.  Exiting..."
	exit 1
fi
remote=`git config branch."$branch".remote`
if [[ -z "$remote" ]]; then
	echo "Active branch is not remote tracked.  Exiting..."
	exit 1
fi

# get git user
echobd "Preparing $(git rev-parse --show-toplevel | xargs -r basename) $branch branch for development use"
if [[ $1 == "" ]]; then
	gituser=`git config --local remote.$remote.url | sed -n "s|\(https\?://\)\?\([^@]*\)@.*|\2|p" | grep -v "\(anonymous\|system\)"`
else
	gituser=$1
fi

if [[ $gituser == "" ]]; then
	read -p "Enter your TDE GIT username []: " -e gituser
fi

if [[ $gituser == "" ]]; then
	gituser="anonymous"
fi

# check git abilities
if [[ -n "`git status --help 2>/dev/null|grep -- '--ignore-submodules'`" ]]; then
  GIT_IGNORE_SUBMODULES="--ignore-submodules"
fi
if [[ -n "`git pull --help |grep -- '--\[no-\]recurse-submodules'`" ]]; then
  GIT_NO_RECURSE_SUBMODULES="--no-recurse-submodules"
fi

# update module and submodules
updateModule() {
    local MODULE
    local REPO_URL
    local REPO_PROTO
    local REPO_MODULE
    local REPO_WORKTREE
    if [[ "$1" != "" ]]; then
        MODULE=$1/
    else
        MODULE=""
    fi

    cd $PARENTDIR/$MODULE
    if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
        git reset --hard HEAD
        git clean -dxff
    fi
    git remote |
    while read REMOTE; do
      REPO_SERVER=$(git config remote."$REMOTE".url |
                    sed -n "s|^http[^/]*/*\([^@]*@\)\?\([^/]*\)/.*|\2|p")
      if [ -x /usr/bin/fping ] && [ -n "$REPO_SERVER" ]; then
        fping -q -r1 "$REPO_SERVER" || continue
      fi
      echo Fetching $REMOTE
      git fetch $REMOTE --prune $GIT_NO_RECURSE_SUBMODULES
    done
    git branch | grep -x "* $branch" >/dev/null || \
    git checkout $branch
    remote=`git config branch."$branch".remote`
    [[ -n "$remote" ]] || return
    git rebase $remote/$branch $branch
    if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
        git reset --hard HEAD
        git clean -dxff
    fi

    if [[ -e $PARENTDIR/$MODULE.gitmodules ]]; then
        if [[ $gituser == "anonymous" ]]; then
            sed -i 's/system@//g' $PARENTDIR/$MODULE.gitmodules
        else
            sed -i "s/system@/$gituser@/g" $PARENTDIR/$MODULE.gitmodules
        fi
        REPO_URL=$(git config --get remote.$remote.url |\
                   sed "s|\(https\?://\)\?\([^@]*@\)\?\(.*\)/[^/]*$|\3|")
        REPO_PROTO=$(git config --get remote.$remote.url |\
                     sed "s|\(https\?://\)\?\([^@]*@\)\?\(.*\)/[^/]*$|\1|")
        REPO_MASTER=scm.trinitydesktop.org/scm/git
        REPO_MODULE=$(git config --get remote.$remote.url |\
                      sed -e "s|\(https\?://\)\?\([^@]*@\)\?\(.*\)/\([^/]*\)$|\4|" -e "s|\.git$||")
        REPO_GITDIR=$(git rev-parse --git-dir)
        if [[ "${REPO_GITDIR/worktrees//}" != "$REPO_GITDIR" ]]; then
            REPO_WORKTREE=${REPO_GITDIR%/[^/]*/worktrees/[^/]*}
        fi
        if [[ "$REPO_URL" != "$REPO_MASTER" ]]; then
            sed -i "s#https\?://\([^@]*@\)\?$REPO_MASTER#$REPO_PROTO\1$REPO_URL#g" $PARENTDIR/$MODULE.gitmodules
        fi
        sed -n "s|^\[submodule \"\([^\"]*\)\"\]$|\1|p" <$PARENTDIR/$MODULE.gitmodules |\
        while read submodule; do
            echobd "Attempting to switch submodule ${MODULE}${submodule}"
            cd $PARENTDIR/$MODULE
            if [[ -n "$REPO_WORKTREE" ]] && [[ ! -e "$submodule/.git" ]]; then
                REPO_LOCALTREE=$(git config --file .gitmodules --get submodule.$submodule.url | \
                                 sed "s#^\(https\?://\)\?\([^@]*@\)\?$REPO_URL#$REPO_WORKTREE#g")
                if [[ ! -d "$REPO_LOCALTREE" ]]; then
                    REPO_LOCALTREE=$REPO_LOCALTREE.git
                fi
                if [[ ! -d "$REPO_LOCALTREE" ]]; then
                    git clone --bare --config "remote.origin.fetch=+refs/heads/*:refs/remotes/origin/*" \
                        "$(git config --file .gitmodules --get submodule.$submodule.url)" "$REPO_LOCALTREE"
                fi
                if [[ "$REPO_MODULE" != "tde" ]]; then
                    git config --file .gitmodules submodule.$submodule.url "$REPO_LOCALTREE"
                else
                  (
                    cd $REPO_LOCALTREE &&
                    git fetch &&
                    git worktree add $PARENTDIR/$MODULE$submodule $branch &&
                    cd $PARENTDIR/$MODULE$submodule &&
                    git branch --set-upstream-to=origin/$branch
                  ) || continue
                fi
            fi
            if [[ -z "`git config --get submodule.$submodule.url`" ]]; then
                git submodule init -- $submodule
            fi
            if [[ ! -e "$submodule/.git" ]]; then
                git submodule update -- $submodule
            fi
            updateModule ${MODULE}${submodule}
        done
        git checkout -- $PARENTDIR/$MODULE.gitmodules
    fi
}

# Update from top module
cd `git rev-parse --show-toplevel`
PARENTDIR=$PWD
echobd "Working in $PARENTDIR"
updateModule
echobd "Done in $PARENTDIR"