#!/bin/bash

# The purpose of this script is to create branches and tags that follow a convention
# If the desired branch already exists, it is skipped.
# If the desired tag already exists, it is skipped.

OLD_TAG=vCGCS_DEV_0018
NEW_TAG=vCGCS_DEV_0019

OLD_BRANCH=CGCS_DEV_0018
NEW_BRANCH=CGCS_DEV_0019

if [ -z "$MY_REPO" ]; then
    echo "MY_REPO is unset"
    exit 1
else
    echo "MY_REPO is set to '$MY_REPO'"
fi

if [ -d "$MY_REPO" ]; then
    cd $MY_REPO
    echo "checking out and pulling old branch"
    wrgit checkout $OLD_BRANCH
    if [ $? -ne 0 ]; then
        echo "ERROR: wrgit checkout $OLD_BRANCH"
        exit 1
    fi

    wrgit pull
    if [ $? -ne 0 ]; then
        echo "ERROR: wrgit pull"
        exit 1
    fi
else
    echo "Could not change to diectory '$MY_REPO'"
    exit 1
fi

echo "Finding subgits"
SUBGITS=`find . -type d -name ".git" | sed "s%/\.git$%%"`

# Go through all subgits and create the NEW_BRANCH if it does not already exist
# Go through all subgits and create the NEW_TAG if it does not already exist
for subgit in $SUBGITS; do
    echo ""
    echo ""
    pushd $subgit > /dev/null
    git fetch
    git fetch --tags
    # check if destination branch already exists
    echo "$subgit"
    branch_check=`git branch -a --list $NEW_BRANCH`
    if [ -z "$branch_check" ]; then
        echo "Creating $NEW_BRANCH"
        git checkout $OLD_BRANCH
        git checkout -b $NEW_BRANCH
        git push origin $NEW_BRANCH:$NEW_BRANCH
    else
        echo "$NEW_BRANCH already exists"
    fi
    tag_check=`git tag -l $NEW_TAG`
    if [ -z "$tag_check" ]; then
        echo "Creating $NEW_TAG"
        # create tag
        git checkout $NEW_BRANCH
        git pull origin
        git tag $NEW_TAG
        git push origin $NEW_TAG
    else
        echo "$NEW_TAG already exists"
    fi

    popd > /dev/null
done

echo "All done.  branches and tags are pushed"