Create release branch from specific tag

release-branches.sh

#!/usr/bin/env bash

echo `pwd`

LEGACY_CORE=('cms' 'reports' 'siteconfig' 'framework' 'installer')
LEGACY_TAG="4.2.0-beta1"
LEGACY_BRANCH="4.2.0"

RECIPES=('recipe-cms' 'recipe-core')

NEW_CORE=('assets' 'admin' 'asset-admin' 'campaign-admin' 'errorpage' 'versioned')
NEW_TAG="1.2.0-beta1"
NEW_BRANCH="1.2.0"

GRAPHQL=('graphql')
GRAPHQL_TAG="2.0.0-beta1"
GRAPHQL_BRANCH="2.0.0"

CONFIG=('config')
CONFIG_TAG="1.0.5-beta1"
CONFIG_BRANCH="1.0.5"

ALLOWED_MODULES=()

COMPARE_URL=false

function skipmodule() {
    if [ "${#ALLOWED_MODULES[@]}" -eq 0 ]; then
        return 1;
    else
        for module in "${ALLOWED_MODULES[@]}"; do
            if [[ "${module}" == "$1" ]]; then
                return 1;
            fi
        done
    fi
    return 0
}

function usage() {
    echo "$1 [modules] [--help] [--compare-url]"
    echo "Where modules is a list of modules to make release branches for eg:"
    echo "$1 config cms framework"
    echo "options: --compare-url Outputs a URL for viewing comparison of patch branch with minor branch"
}

for arg in "$@"; do
    if [[ ! "${arg}" =~ ^- ]]; then
        ALLOWED_MODULES+=("${arg}")
    elif [[ "${arg}" == '--help' ]]; then
        usage "$0"
        read -p "Continue"
        exit
    elif [[ "${arg}" == '--compare-url' ]]; then
        COMPARE_URL=true
    fi
done

for i in "${LEGACY_CORE[@]}"; do
    if skipmodule "$i"; then
        continue
    fi
    echo "Checkout $i:$LEGACY_TAG and branch $LEGACY_BRANCH"
    if [ ! -d "$i" ]; then
        git clone "https://github.com/silverstripe/silverstripe-$i" "$i"
    fi
    cd "$i"
    git fetch --all
    git rev-parse --verify "$LEGACY_BRANCH"
    if [ $? -ne 0 ]; then
        git checkout -b "$LEGACY_BRANCH" "$LEGACY_TAG"
        git push origin "$LEGACY_BRANCH"
    else
        echo "Branch $LEGACY_BRANCH exists, skipping"
    fi
    if [ "${COMPARE_URL}" ]; then
        echo "https://github.com/silverstripe/silverstripe-$i/compare/$LEGACY_BRANCH...${LEGACY_BRANCH:0:-2}"
    fi
    cd ..
done

for i in "${RECIPES[@]}"; do
    if skipmodule "$i"; then
        continue
    fi
    echo "Checkout $i:$LEGACY_TAG and branch $LEGACY_BRANCH"
    if [ ! -d "$i" ]; then
        git clone "https://github.com/silverstripe/$i" "$i"
    fi
    cd "$i"
    git fetch --all
    git rev-parse --verify "$LEGACY_BRANCH"
    if [ $? -ne 0 ]; then
        git checkout -b "$LEGACY_BRANCH" "$LEGACY_TAG"
        git push origin "$LEGACY_BRANCH"
    else
        echo "Branch $LEGACY_BRANCH exists, skipping"
    fi
    if [ "${COMPARE_URL}" ]; then
        echo "https://github.com/silverstripe/$i/compare/$LEGACY_BRANCH...${LEGACY_BRANCH:0:-2}"
    fi
    cd ..
done

for i in "${NEW_CORE[@]}"; do
    if skipmodule "$i"; then
        continue
    fi
    echo "Checkout $i:$NEW_TAG and branch $NEW_BRANCH"
    if [ ! -d "$i" ]; then
        git clone "https://github.com/silverstripe/silverstripe-$i" "$i"
    fi
    cd "$i"
    git fetch --all
    git rev-parse --verify "$NEW_BRANCH"
    if [ $? -ne 0 ]; then
        git checkout -b "$NEW_BRANCH" "$NEW_TAG"
        git push origin "$NEW_BRANCH"
    else
        echo "Branch $NEW_BRANCH exists, skipping"
    fi
    if [ "${COMPARE_URL}" ]; then
        echo "https://github.com/silverstripe/silverstripe-$i/compare/$NEW_BRANCH...${NEW_BRANCH:0:-2}"
    fi
    cd ..
done

for i in "${GRAPHQL[@]}"; do
    if skipmodule "$i"; then
        continue
    fi
    echo "Checkout $i:$GRAPHQL_TAG and branch $GRAPHQL_BRANCH"
    if [ ! -d "$i" ]; then
        git clone "https://github.com/silverstripe/silverstripe-$i" "$i"
    fi
    cd "$i"
    git fetch --all
    git rev-parse --verify "$GRAPHQL_BRANCH"
    if [ $? -ne 0 ]; then
        git checkout -b "$GRAPHQL_BRANCH" "$GRAPHQL_TAG"
        git push origin "$GRAPHQL_BRANCH"
    else
        echo "Branch $GRAPHQL_BRANCH exists, skipping"
    fi
    if [ "${COMPARE_URL}" ]; then
        echo "https://github.com/silverstripe/silverstripe-$i/compare/$GRAPHQL_BRANCH...${GRAPHQL_BRANCH:0:-2}"
    fi
    cd ..
done

for i in "${CONFIG[@]}"; do
    if skipmodule "$i"; then
        continue
    fi
    echo "Checkout $i:$CONFIG_TAG and branch $CONFIG_BRANCH"
    if [ ! -d "$i" ]; then
        git clone "https://github.com/silverstripe/silverstripe-$i" "$i"
    fi
    cd "$i"
    git fetch --all
    git rev-parse --verify "$CONFIG_BRANCH"
    if [ $? -ne 0 ]; then
        git checkout -b "$CONFIG_BRANCH" "$CONFIG_TAG"
        git push origin "$CONFIG_BRANCH"
    else
        echo "Branch $CONFIG_BRANCH exists, skipping"
    fi
    if [ "${COMPARE_URL}" ]; then
        echo "https://github.com/silverstripe/silverstripe-$i/compare/$CONFIG_BRANCH...${CONFIG_BRANCH:0:-2}"
    fi
    cd ..
done

read -p "Press enter to quit"