bump_version

#!/usr/bin/env bash

set -euo pipefail

USAGE='\033[1;31mUsage: ./bump_version major|minor|patch\033[0m'

if [ $# -ne 1 ]; then
    echo -e $USAGE
    exit 1
fi

major=$(grep 'versionMajor' gradle.properties | awk -F= '{print $2}')
minor=$(grep 'versionMinor' gradle.properties | awk -F= '{print $2}')
patch=$(grep 'versionPatch' gradle.properties | awk -F= '{print $2}')

version="${major}.${minor}.${patch}"

if [[ $1 = 'major' ]]; then
    ((major++))
    minor=0
    patch=0
elif [[ $1 = 'minor' ]]; then
    ((minor++))
    patch=0
elif [[ $1 = 'patch' ]]; then
    ((patch++))
else
    echo -e $USAGE
    exit 1
fi

new_version="${major}.${minor}.${patch}"

read -p "Bump version from ${version} to ${new_version}? [y/N] " answer

case ${answer:0:1} in
    y|Y)
        if [[ -n $(git status --porcelain) ]]; then
            echo -e "\033[1;32mStashing changes...\033[0m"
            git stash push --include-untracked -m "version-bump-autostash"
            autostashed=1
        else
            autostashed=0
        fi

        sed -i '' -e "s/^versionMajor=.*$/versionMajor=$major/" \
            -e "s/^versionMinor=.*$/versionMinor=$minor/" \
            -e "s/^versionPatch=.*$/versionPatch=$patch/" \
            gradle.properties
        echo -e "\033[1;34mBumped version to ${new_version}.\033[0m"

        commits_since_last_tag=$(git log $(git describe --tags --abbrev=0)..HEAD --oneline --pretty=format:%s | sed -e 's/^/* /' -e 's/$/\\\\\\/')
        echo "$commits_since_last_tag"
        echo -e "\033[1;34mAdding build date to changelog...\033[0m"

        today=$(date +'%Y-%m-%d %H:%M %Z')
        cleaned_version=$(echo ${new_version} | sed 's/\./\\./g')
        sed -i '' "3i \\
**${new_version}** (${today})\\
\\
${commits_since_last_tag}
\\
" CHANGELOG.md

        echo -e "\033[1;34mOpening changelog for edition...\033[0m"

        vim +5 '+normal $' +startinsert CHANGELOG.md

        git commit -am "Bump version to ${new_version}"
        git tag $new_version

        if [[ "$autostashed" -eq 1 ]]; then
            stash_id=$(git stash list | grep version-bump-autostash | head -n1 | awk -F: '{print $1}')

            echo -e "\033[1;32mUnstashing changes...\033[0m"
            git stash pop "$stash_id"
        fi
    ;;
esac