# $Id$
# vim:et:ft=sh:sts=2:sw=2
#
# git-flow -- A collection of Git extensions to provide high-level
# repository operations for Vincent Driessen's branching model.
#
# A blog post presenting this model is found at:
#    http://blog.avirtualhome.com/development-workflow-using-git/
#
# Feel free to contribute to this project at:
#    http://github.com/petervanderdoes/gitflow
#
# Authors:
# Copyright 2012-2019 Peter van der Does. All rights reserved.
#
# Original Author:
# Copyright 2010 Vincent Driessen. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
# ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
# SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#

usage() {
	OPTIONS_SPEC="\
git flow init

Initialize a new git repo with support for the branching model.

For more specific help type the command followed by --help
--
"
	flags_help
}

# Parse arguments and set common variables
parse_args() {
	FLAGS "$@" || exit $?
	eval set -- "${FLAGS_ARGV}"
}

# Default entry when no SUBACTION is given
cmd_default() {
	OPTIONS_SPEC="\
git flow init [-h] [-d] [-f]

Setup a git repository for git flow usage. Can also be used to start a git repository.
--
h,help!             Show this help
showcommands!       Show git commands while executing them
d,[no]defaults      Use default branch naming conventions
f,[no]force         Force setting of gitflow branches, even if already configured

p,feature!          Feature branches
b,bugfix!           Bugfix branches
r,release!          Release branches
x,hotfix!           Hotfix branches
s,support!          Support branches
t,tag!              Version tag prefix

Use config file location
local!   use repository config file
global!  use global config file
system!  use system config file
file=    use given config file
"
	local gitflow_config_option should_check_existence branchcount guess
	local master_branch develop_branch default_suggestion answer prefix

	# Define flags
	DEFINE_boolean 'force' false 'force setting of gitflow branches, even if already configured' f
	DEFINE_boolean 'defaults' false 'use default branch naming conventions' d
	DEFINE_boolean 'local' false 'use repository config file'
	DEFINE_boolean 'global' false 'use global config file'
	DEFINE_boolean 'system' false 'use system config file'
	DEFINE_string 'file' "" 'use given config file'
	DEFINE_string 'feature' "" 'feature branches' p
	DEFINE_string 'bugfix' "" 'bugfix branches' b
	DEFINE_string 'release' "" 'release branches' r
	DEFINE_string 'hotfix' "" 'hotfix branches' x
	DEFINE_string 'support' "" 'support branches' s
	DEFINE_string 'tag' "" 'version tag prefix' t

	# Override defaults with values from config
	gitflow_override_flag_boolean   "init.defaults"   "defaults"

	# Parse arguments
	parse_args "$@"

	if [ "$FLAGS_file" != "" ]; then
		gitflow_config_option="--file $FLAGS_file"
	elif flag local; then
		gitflow_config_option="--local"
	elif flag global; then
		gitflow_config_option="--global"
	elif flag system; then
		gitflow_config_option="--system"
	else
		gitflow_config_option=""
	fi

	if git_config_bool_exists "user.useconfigonly"; then
		user_email=$(git config --get user.email)
		user_name=$(git config --get user.name)
		if [ -z "${user_email}" ] || [ -z "${user_name}" ]; then
			die "Configuration useconfigonly is set but no name and/or email was set"
		fi
	fi

	if ! git rev-parse --git-dir >/dev/null 2>&1; then
		git_do init
	else
		# Assure that we are not working in a repo with local changes
		git_repo_is_headless || require_clean_working_tree
	fi

	# Running git flow init on an already initialized repo is fine
	if gitflow_is_initialized && ! flag force; then
		warn "Already initialized for gitflow."
		warn "To force reinitialization, use: git flow init -f"
		exit 0
	fi

	if flag defaults; then
		warn "Using default branch names."
	fi

	# Add a master branch if no such branch exists yet

	if gitflow_has_master_configured && ! flag force; then
		master_branch=$(git config --get gitflow.branch.master)
	else
		# Two cases are distinguished:
		# 1. A fresh git repo (without any branches)
		#    We will create a new master/develop branch for the user
		# 2. Some branches do already exist
		#    We will disallow creation of new master/develop branches and
		#    rather allow to use existing branches for git-flow.
		branch_count=$(git_local_branches | wc -l)
		if [ "$branch_count" -eq 0 ]; then
			echo "No branches exist yet. Base branches must be created now."
			should_check_existence=NO
			default_suggestion=$(git config --get gitflow.branch.master || echo master)
		else
			echo
			echo "Which branch should be used for bringing forth production releases?"
			git_local_branches | sed 's/^.*$/   - &/g'

			should_check_existence=YES
			default_suggestion=
			for guess in $(git config --get gitflow.branch.master) 'production' 'main' 'master'; do
				if git_local_branch_exists "$guess"; then
					default_suggestion="$guess"
					break
				fi
			done

		fi

		if [ -z $default_suggestion ] && flag defaults; then
				should_check_existence=YES
				default_suggestion=$(git config --get gitflow.branch.master || echo master)
		fi

		printf "Branch name for production releases: [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		master_branch=${answer:-$default_suggestion}

		# Check existence in case of an already existing repo
		if [ "$should_check_existence" = "YES" ]; then
			# If no local branch exists and a remote branch of the same
			# name exists, checkout that branch and use it for master
			if ! git_local_branch_exists "$master_branch" && git_remote_branch_exists "origin/$master_branch"; then
				git_do branch "$master_branch" "origin/$master_branch" >/dev/null 2>&1
			elif ! git_local_branch_exists "$master_branch"; then
				die "Local branch '$master_branch' does not exist."
			fi
		fi

		# Store the name of the master branch
		git_do config $gitflow_config_option gitflow.branch.master "$master_branch"
	fi

	# Add a develop branch if no such branch exists yet
	if gitflow_has_develop_configured && ! flag force; then
		develop_branch=$(git config --get gitflow.branch.develop)
	else
		# Again, the same two cases as with the master selection are
		# considered (fresh repo or repo that contains branches)
		branch_count=$(git_local_branches | grep -v "^${master_branch}\$" | wc -l)
		if [ "$branch_count" -eq 0 ]; then
			should_check_existence=NO
			default_suggestion=$(git config --get gitflow.branch.develop || echo develop)
		else
			echo
			echo "Which branch should be used for integration of the \"next release\"?"
			git_local_branches | grep -v "^${master_branch}\$" | sed 's/^.*$/   - &/g'

			should_check_existence=YES
			default_suggestion=
			for guess in $(git config --get gitflow.branch.develop) 'develop' 'int' 'integration' 'master'; do
				if git_local_branch_exists "$guess" && [ "$guess" != "$master_branch" ]; then
					default_suggestion="$guess"
					break
				fi
			done
		fi

		if [ -z $default_suggestion ] && flag defaults; then
			should_check_existence=YES
			default_suggestion=$(git config --get gitflow.branch.develop || echo develop)
		fi

		printf "Branch name for \"next release\" development: [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		develop_branch=${answer:-$default_suggestion}

		if [ "$master_branch" = "$develop_branch" ]; then
			die "Production and integration branches should differ."
		fi

		# Check existence in case of an already existing repo
		if [ "$should_check_existence" = "YES" ]; then
			git_local_branch_exists "$develop_branch" || die "Local branch '$develop_branch' does not exist."
		fi

		# Store the name of the develop branch
		git_do config $gitflow_config_option gitflow.branch.develop "$develop_branch"
	fi

	# Creation of HEAD
	# ----------------
	# We create a HEAD now, if it does not exist yet (in a fresh repo). We need
	# it to be able to create new branches.
	local created_gitflow_branch=0
	if ! git rev-parse --quiet --verify HEAD >/dev/null 2>&1; then
		git_do symbolic-ref HEAD "refs/heads/$master_branch"
		git_do commit --allow-empty --quiet -m "Initial commit"
		created_gitflow_branch=1
	fi

	# Creation of master
	# ------------------
	# At this point, there always is a master branch: either it existed already
	# (and was picked interactively as the production branch) or it has just
	# been created in a fresh repo

	# Creation of develop
	# -------------------
	# The develop branch possibly does not exist yet.  This is the case when,
	# in a git init'ed repo with one or more commits, master was picked as the
	# default production branch and develop was "created".  We should create
	# the develop branch now in that case (we base it on master, of course)
	if ! git_local_branch_exists "$develop_branch"; then
		if git_remote_branch_exists "origin/$develop_branch"; then
			git_do branch "$develop_branch" "origin/$develop_branch" >/dev/null 2>&1
		else
			git_do branch --no-track "$develop_branch" "$master_branch"
		fi
		created_gitflow_branch=1
	fi

	# Assert the git-flow repo has been correctly initialized
	gitflow_is_initialized

	# Switch to develop branch if its newly created
	if [ $created_gitflow_branch -eq 1 ]; then
		git_do checkout -q "$develop_branch" || die "Could not check out branch '$develop_branch'."
	fi

	# Ask the user for naming conventions (branch and tag prefixes )
	if flag force || \
		! git config --get gitflow.prefix.feature >/dev/null 2>&1 ||
		! git config --get gitflow.prefix.bugfix >/dev/null 2>&1 ||
		! git config --get gitflow.prefix.release >/dev/null 2>&1 ||
		! git config --get gitflow.prefix.hotfix >/dev/null 2>&1 ||
		! git config --get gitflow.prefix.support >/dev/null 2>&1 ||
		! git config --get gitflow.prefix.versiontag >/dev/null 2>&1; then
		echo
		echo "How to name your supporting branch prefixes?"
	fi

	# Feature branches
	if ! git config --get gitflow.prefix.feature >/dev/null 2>&1 || flag force; then
		default_suggestion=$(echo $FLAGS_feature || git config --get gitflow.prefix.feature || echo feature/)
		printf "Feature branches? [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		[ "$answer" = "-" ] && prefix= || prefix=${answer:-$default_suggestion}
		git_do config $gitflow_config_option gitflow.prefix.feature "$prefix"
	fi

	# Bugfix branches
	if ! git config --get gitflow.prefix.bugfix >/dev/null 2>&1 || flag force; then
		default_suggestion=$(echo $FLAGS_bugfix || git config --get gitflow.prefix.bugfix || echo bugfix/)
		printf "Bugfix branches? [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		[ "$answer" = "-" ] && prefix= || prefix=${answer:-$default_suggestion}
		git_do config $gitflow_config_option gitflow.prefix.bugfix "$prefix"
	fi

	# Release branches
	if ! git config --get gitflow.prefix.release >/dev/null 2>&1 || flag force; then
		default_suggestion=$(echo $FLAGS_release || git config --get gitflow.prefix.release || echo release/)
		printf "Release branches? [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		[ "$answer" = "-" ] && prefix= || prefix=${answer:-$default_suggestion}
		git_do config $gitflow_config_option gitflow.prefix.release "$prefix"
	fi

	# Hotfix branches
	if ! git config --get gitflow.prefix.hotfix >/dev/null 2>&1 || flag force; then
		default_suggestion=$(echo $FLAGS_hotfix || git config --get gitflow.prefix.hotfix || echo hotfix/)
		printf "Hotfix branches? [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		[ "$answer" = "-" ] && prefix= || prefix=${answer:-$default_suggestion}
		git_do config $gitflow_config_option gitflow.prefix.hotfix "$prefix"
	fi

	# Support branches
	if ! git config --get gitflow.prefix.support >/dev/null 2>&1 || flag force; then
		default_suggestion=$(echo $FLAGS_support || git config --get gitflow.prefix.support || echo support/)
		printf "Support branches? [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		[ "$answer" = "-" ] && prefix= || prefix=${answer:-$default_suggestion}
		git_do config $gitflow_config_option gitflow.prefix.support "$prefix"
	fi
	
	# Version tag prefix
	if ! git config --get gitflow.prefix.versiontag >/dev/null 2>&1 || flag force; then
		default_suggestion=$(echo $FLAGS_tag || git config --get gitflow.prefix.versiontag || echo "")
		printf "Version tag prefix? [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		[ "$answer" = "-" ] && prefix= || prefix=${answer:-$default_suggestion}
		git_do config $gitflow_config_option gitflow.prefix.versiontag "$prefix"
	fi

	# Paths
	if ! git config --get gitflow.path.hooks >/dev/null 2>&1 || flag force; then
		DOT_GIT_DIR=$(git rev-parse --git-dir)
		DOT_GIT_DIR=$(cd "$DOT_GIT_DIR" >/dev/null 2>&1 && pwd)
		default_suggestion=$(git config --get gitflow.path.hooks || git config --get core.hooksPath || echo "$DOT_GIT_DIR"/hooks)
		printf "Hooks and filters directory? [$default_suggestion] "
		if noflag defaults; then
			read answer
		else
			printf "\n"
		fi
		[ "$answer" = "-" ] && hooks_dir= || hooks_dir=${answer:-$default_suggestion}
		git_do config $gitflow_config_option gitflow.path.hooks "$hooks_dir"
	fi

	# TODO: what to do with origin?
}

cmd_help() {
	usage
	exit 0
}