.make-release-support

#!/bin/bash

# Check if there are changes in the current Git repository
function hasChanges() {
	test -n "$(git status -s .)"
}

# Get the release version from the .release file
function getRelease() {
	if [[ -f .release ]]; then
    	awk -F= '/release/{print $2}' .release
	fi
}

# Get the base tag from the .release file
function getBaseTag() {
	# Extract the tag value and remove the release version from it
	sed -n -e "s/tag=\\(.*\\)$(getRelease)\$/\\1/p" .release
}

# Get the complete tag for the current release
function getTag() {
	if [[ -z "$1" ]] ; then
		# If no version number is specified, return the tag from the .release file
		awk -F= '/tag/{print $2}' .release
	else
		# Otherwise, append the specified version number to the base tag
		echo "$(getBaseTag)$1"
	fi
}

# Set the release version in the .release file and update the package.json file
function setRelease() {
	if [[ -n "$1" ]] ; then
		# Replace the tag and release version in the .release file
		sed -i.x -e "s/tag=.*/tag=$(getTag "$1")/" .release
		sed -i.x -e "s/release=.*/release=$1/g" .release
		# Update the version number in the package.json file
		sed -i.x -e '0,/"version": "[^"]*"/s//"version": "'$1'"/' package.json
		# Remove backup files created by sed
		rm -f .release.x
		rm -f package.json.x
	else
		# Print an error message if no version number is specified
		echo "ERROR: missing release version parameter " >&2
		return 1
	fi
}

# Check if a tag already exists for the current release
function tagExists() {
	# Use the specified tag or the current tag if none is specified
	tag=${1:-$(getTag)}
	# Check if the tag exists in Git
	test -n "$tag" && test -n "$(git tag | grep "^$tag\$")"
}

# Check if the current Git repository differs from the current release
function differsFromRelease() {
	tag=$(getTag)
	# Check if the tag does not exist or if there are differences between the current state and the tag
	! tagExists "$tag" || test -n "$(git diff --shortstat -r "$tag" .)"
}

# Get the version number for the current release
function getVersion() {
	result=$(getRelease)

	if differsFromRelease; then
		# Append the short hash of the latest commit if there are differences between the current state and the tag
		result="$result-$(git rev-parse --short HEAD)"
	fi

	if hasChanges ; then
		# Append "-dirty" if there are uncommitted changes in the Git repository
		result="$result-dirty"
	fi
	echo "$result"
}

function nextMicroLevel() {
	version=${1:-$(getRelease)}
	# Increment the micro-level version number by 1
	major_and_minor=$(echo "$version" | cut -d. -f1,2)
	micro=$(echo "$version" | cut -d. -f3)
	version=$(printf "%s.%d" "$major_and_minor" $((micro + 1)))
	echo "$version"
}
# Get the next minor-level version number for the current release
function nextMinorLevel() {
	version=${1:-$(getRelease)}
	major=$(echo "$version" | cut -d. -f1);
	minor=$(echo "$version" | cut -d. -f2);
	version=$(printf "%d.%d.0" "$major" $((minor + 1))) ;
	echo "$version"
}

# Get the next major-level version number for the current release
function nextMajorLevel() {
	version=${1:-$(getRelease)}
	major=$(echo "$version" | cut -d. -f1);
	version=$(printf "%d.0.0" $((major + 1)))
	echo "$version"
}