#!/usr/bin/env bash

set -euo pipefail

# shellcheck source=scripts/lib.sh

source "$(dirname "$(dirname "${BASH_SOURCE[0]}")")/lib.sh"

cdroot

usage() {

cat <<EOH

Usage: ./version_tag.sh [--dry-run] [--old-version <version>] [--ref <ref>] <--major | --minor | --patch>

This script should be called to tag a new release. It will take the suggested

increment (major, minor, patch) and optionally promote e.g. patch -> minor if

there are breaking changes between the previous version and the given --ref

(or HEAD).

Pass --old-version optionally to ensure that the version is bumped from the

provided version instead of the latest tag (for use in release.sh).

This script will create a git tag, it should only be called by release.sh or in

CI.

EOH

}

dry_run=0

old_version=

ref=HEAD

increment=

args="$(getopt -o h -l dry-run,help,old-version:,ref:,major,minor,patch -- "$@")"

eval set -- "$args"

while true; do

case "$1" in

--dry-run)

dry_run=1

shift

;;

--old-version)

old_version="$2"

shift 2

;;

--ref)

ref="$2"

shift 2

;;

-h | --help)

usage

exit 0

;;

--major | --minor | --patch)

if [[ -n $increment ]]; then

error "Cannot specify multiple version increments."

fi

increment=${1#--}

shift

;;

--)

shift

break

;;

*)

error "Unrecognized option: $1"

;;

esac

done

# Check dependencies.

dependencies git

if [[ -z $increment ]]; then

error "No version increment provided."

fi

if [[ -z $old_version ]]; then

old_version="$(git describe --abbrev=0 "$ref^1" --always)"

fi

cur_tag="$(git describe --abbrev=0 "$ref" --always)"

if [[ $old_version != "$cur_tag" ]]; then

error "A newer tag than \"$old_version\" already exists for \"$ref\" ($cur_tag), aborting."

fi

ref=$(git rev-parse --short "$ref")

log "Checking commit metadata for changes since $old_version..."

# shellcheck source=scripts/release/check_commit_metadata.sh

source "$SCRIPT_DIR/release/check_commit_metadata.sh" "$old_version" "$ref"

if ((COMMIT_METADATA_BREAKING == 1)); then

prev_increment=$increment

if [[ $increment == patch ]]; then

increment=minor

fi

if [[ $prev_increment != "$increment" ]]; then

log "Breaking change detected, changing version increment from \"$prev_increment\" to \"$increment\"."

else

log "Breaking change detected, provided increment is sufficient, using \"$increment\" increment."

fi

else

log "No breaking changes detected, using \"$increment\" increment."

fi

mapfile -d . -t version_parts <<<"${old_version#v}"

case "$increment" in

patch)

version_parts[2]=$((version_parts[2] + 1))

;;

minor)

version_parts[1]=$((version_parts[1] + 1))

version_parts[2]=0

;;

major)

version_parts[0]=$((version_parts[0] + 1))

version_parts[1]=0

version_parts[2]=0

;;

*)

error "Unrecognized version increment."

;;

esac

new_version="v${version_parts[0]}.${version_parts[1]}.${version_parts[2]}"

log "Old version: $old_version"

log "New version: $new_version"

maybedryrun "$dry_run" git tag -a "$new_version" -m "Release $new_version" "$ref"

echo "$new_version"