git-flow-bugfix

# $Id$
# 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.
#

initialize() {
	require_git_repo
	require_gitflow_initialized
	git config --get gitflow.prefix.bugfix >/dev/null 2>&1 || die "Bugfix prefix not set. Please run 'git flow init'."
	gitflow_load_settings
	PREFIX=$(git config --get gitflow.prefix.bugfix)
}

usage() {
	OPTIONS_SPEC="\
git flow bugfix [list]
git flow bugfix start
git flow bugfix finish
git flow bugfix publish
git flow bugfix track
git flow bugfix diff
git flow bugfix rebase
git flow bugfix checkout
git flow bugfix pull
git flow bugfix delete
git flow bugfix rename

Manage your bugfix branches.

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

cmd_default() {
	cmd_list "$@"
}

cmd_list() {
	OPTIONS_SPEC="\
git flow bugfix [list] [-h] [-v]

Lists all the existing bugfix branches in the local repository.
--
h,help!     Show this help
v,verbose   Verbose (more) output
"
	local bugfix_branches current_branch width branch len
	local base develop_sha branch_sha

	# Define flags
	DEFINE_boolean 'verbose' false 'verbose (more) output' v

	# Parse argun=ments
	parse_args "$@"

	bugfix_branches=$(git_local_branches_prefixed "$PREFIX")
	if [ -z "$bugfix_branches" ]; then
		warn "No bugfix branches exist."
		warn ""
		warn "You can start a new bugfix branch:"
		warn ""
		warn "    git flow bugfix start <name> [<base>]"
		warn ""
		exit 0
	fi
	current_branch=$(git_current_branch)

	# Determine column width first
	width=0
	for branch in $bugfix_branches; do
		len=${#branch}
		width=$(max $width $len)
	done
	width=$(($width+3-${#PREFIX}))

	for branch in $bugfix_branches; do
		if [ "$branch" = "$current_branch" ]; then
			printf "* "
		else
			printf "  "
		fi
		if flag verbose; then
			base=$(git merge-base "$branch" "$DEVELOP_BRANCH")
			develop_sha=$(git rev-parse "$DEVELOP_BRANCH")
			branch_sha=$(git rev-parse "$branch")
			printf "%-${width}s" "${branch#$PREFIX}"
			if [ "$branch_sha" = "$develop_sha" ]; then
				printf "(no commits yet)"
			elif [ "$base" = "$branch_sha" ]; then
				printf "(is behind develop, may ff)"
			elif [ "$base" = "$develop_sha" ]; then
				printf "(based on latest develop)"
			else
				printf "(may be rebased)"
			fi
		else
			printf "%s" "${branch#$PREFIX}"
		fi
		echo
	done
}

cmd_help() {
	usage
	exit 0
}

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

	# read arguments into global variables
	if [ -z $1 ]; then
		NAME=''
	else
		NAME=$1
	fi
	BRANCH=$PREFIX$NAME
}

parse_remote_name() {
	# Parse arguments
	FLAGS "$@" || exit $?
	eval set -- "${FLAGS_ARGV}"

	# read arguments into global variables
	if [ -z $1 ]; then
		REMOTE=''
	else
		REMOTE=$1
	fi

	if [ -z $2 ]; then
		NAME=''
	else
		NAME=$2
	fi
	BRANCH=$PREFIX$NAME
}

cmd_start() {
	OPTIONS_SPEC="\
git flow bugfix start [-h] [-F] <name> [<base>]

Start new bugfix <name>, optionally basing it on <base> instead of <develop>
--
h,help!          Show this help
showcommands!    Show git commands while executing them
F,[no]fetch      Fetch from origin before performing local operation
"
	local base

	# Define flags
	DEFINE_boolean 'fetch' false 'fetch from origin before performing local operation' F

	# Override defaults with values from config
	gitflow_override_flag_boolean   "bugfix.start.fetch"   "fetch"

	# Parse arguments
	parse_args "$@"
	eval set -- "${FLAGS_ARGV}"
	base=${2:-$DEVELOP_BRANCH}

	require_base_is_local_branch "$base"
	gitflow_require_name_arg

	# Update the local repo with remote changes, if asked
	if flag fetch; then
		git_fetch_branch "$ORIGIN" "$base"
	fi

	# Sanity checks
	require_branch_absent "$BRANCH"

	# If the origin branch counterpart exists, assert that the local branch
	# isn't behind it (to avoid unnecessary rebasing)
	if git_remote_branch_exists "$ORIGIN/$base"; then
		require_branches_equal "$base" "$ORIGIN/$base"
	fi

	run_pre_hook "$NAME" "$ORIGIN" "$BRANCH" "$base"

	gitflow_config_set_base_branch $base $BRANCH

	# create branch
	git_do checkout -b "$BRANCH" "$base" || die "Could not create bugfix branch '$BRANCH'."

	run_post_hook "$NAME" "$ORIGIN" "$BRANCH" "$base"

	echo
	echo "Summary of actions:"
	echo "- A new branch '$BRANCH' was created, based on '$base'"
	echo "- You are now on branch '$(git_current_branch)'"
	echo ""
	echo "Now, start committing on your bugfix. When done, use:"
	echo ""
	echo "     git flow bugfix finish $NAME"
	echo
}

cmd_finish() {
	OPTIONS_SPEC="\
git flow bugfix finish [-h] [-F] [-r] [-p] [-k] [-D] [-S] [--no-ff] <name|nameprefix>

Finish bugfix <name>
--
h,help!                Show this help
showcommands!          Show git commands while executing them
F,[no]fetch            Fetch from origin before performing finish
r,[no]rebase           Rebase before merging
p,[no]preserve-merges  Preserve merges while rebasing
[no]push               Push to origin after performing finish
k,[no]keep             Keep branch after performing finish
keepremote!        	   Keep the remote branch
keeplocal!             Keep the local branch
D,[no]force_delete     Force delete bugfix branch after finish
S,[no]squash           Squash bugfix during merge
no-ff!                 Never fast-forward during the merge
"
	local finish_base

	# Define flags
	DEFINE_boolean 'fetch' false "fetch from $ORIGIN before performing finish" F
	DEFINE_boolean 'rebase' false "rebase before merging" r
	DEFINE_boolean 'preserve-merges' false 'try to recreate merges while rebasing' p
	DEFINE_boolean 'push' false "push to $ORIGIN after performing finish"
	DEFINE_boolean 'keep' false "keep branch after performing finish" k
	DEFINE_boolean 'keepremote' false "keep the remote branch"
	DEFINE_boolean 'keeplocal' false "keep the local branch"
	DEFINE_boolean 'force_delete' false "force delete bugfix branch after finish" D
	DEFINE_boolean 'squash' false "squash bugfix during merge" S
	DEFINE_boolean 'squash-info' false "add branch info during squash"
	DEFINE_boolean 'no-ff!' false "Don't fast-forward ever during merge "

	# Override defaults with values from config
	gitflow_override_flag_boolean   "bugfix.finish.fetch"             "fetch"
	gitflow_override_flag_boolean   "bugfix.finish.rebase"            "rebase"
	gitflow_override_flag_boolean   "bugfix.finish.preserve-merges"   "preserve_merges"
	gitflow_override_flag_boolean   "bugfix.finish.push"              "push"
	gitflow_override_flag_boolean   "bugfix.finish.keep"              "keep"
	gitflow_override_flag_boolean   "bugfix.finish.keepremote"        "keepremote"
	gitflow_override_flag_boolean   "bugfix.finish.keeplocal"         "keeplocal"
	gitflow_override_flag_boolean   "bugfix.finish.force-delete"      "force_delete"
	gitflow_override_flag_boolean   "bugfix.finish.squash"            "squash"
	gitflow_override_flag_boolean   "bugfix.finish.squash-info"       "squash_info"
	gitflow_override_flag_boolean   "bugfix.finish.no-ff"             "no_ff"

	# Parse arguments
	parse_args "$@"

	# Use current branch if no name is given
	if [ "$NAME" = "" ]; then
		gitflow_use_current_branch_name
	fi

	# Keeping both branches implies the --keep flag to be true.
	if flag keepremote && flag keeplocal; then
		FLAGS_keep=$FLAGS_TRUE
	fi

	# Sanity checks
	require_branch "$BRANCH"

	BASE_BRANCH=$(gitflow_config_get_base_branch $BRANCH)
	BASE_BRANCH=${BASE_BRANCH:-$DEVELOP_BRANCH}
	git_local_branch_exists "$BASE_BRANCH" || die "The base '$BASE_BRANCH' doesn't exists locally or is not a branch. Can't finish the bugfix branch '$BRANCH'."

	# Detect if we're restoring from a merge conflict
	if [ -f "$DOT_GIT_DIR/.gitflow/MERGE_BASE" ]; then
		#
		# TODO: detect that we're working on the correct branch here!
		# The user need not necessarily have given the same $NAME twice here
		# (although he/she should).
		#

		# TODO: git_is_clean_working_tree() should provide an alternative
		# exit code for "unmerged changes in working tree", which we should
		# actually be testing for here
		if git_is_clean_working_tree; then
			finish_base=$(cat "$DOT_GIT_DIR/.gitflow/MERGE_BASE")

			# Since the working tree is now clean, either the user did a
			# successful merge manually, or the merge was cancelled.
			# We detect this using git_is_branch_merged_into()
			if git_is_branch_merged_into "$BRANCH" "$finish_base"; then
				rm -f "$DOT_GIT_DIR/.gitflow/MERGE_BASE"
				helper_finish_cleanup
				exit 0
			else
				# If the user cancelled the merge and decided to wait until
				# later,that's fine. But we have to acknowledge this by
				# removing the MERGE_BASE file and continuing normal execution
				# of the finish
				rm -f "$DOT_GIT_DIR/.gitflow/MERGE_BASE"
			fi
		else
			echo
			echo "Merge conflicts not resolved yet, use:"
			echo "    git mergetool"
			echo "    git commit"
			echo
			echo "You can then complete the finish by running it again:"
			echo "    git flow bugfix finish $NAME"
			echo
			exit 1
		fi
	fi

	# Sanity checks
	require_clean_working_tree

	# We always fetch the Branch from Origin
	# This is done to avoid possible commits on the remote that are not
	# merged into the local branch
	if git_remote_branch_exists "$ORIGIN/$BRANCH"; then
		git_fetch_branch "$ORIGIN" "$BRANCH"
	fi

	# Update local branches with remote branches
	if flag fetch; then
		git_fetch_branch "$ORIGIN" "$BASE_BRANCH"
	fi

	# Check if the local branches have all the commits from the remote branches
	if git_remote_branch_exists "$ORIGIN/$BRANCH"; then
			require_branches_equal "$BRANCH" "$ORIGIN/$BRANCH"
	fi
	if git_remote_branch_exists "$ORIGIN/$BASE_BRANCH"; then
		require_branches_equal "$BASE_BRANCH" "$ORIGIN/$BASE_BRANCH"
	fi

	run_pre_hook "$NAME" "$ORIGIN" "$BRANCH"

	# If the user wants to rebase, do that first
	if flag rebase; then
		local _rebase_opts=""
		if flag preserve_merges; then
			_rebase_opts="$_rebase_opts -p"
		fi
		if flag showcommands; then
			_rebase_opts="$_rebase_opts --showcommands"
		fi
		if ! git flow bugfix rebase $_rebase_opts "$NAME"; then
			warn "Finish was aborted due to conflicts during rebase."
			warn "Please finish the rebase manually now."
			warn "When finished, re-run:"
			warn "    git flow bugfix finish '$NAME' '$BASE_BRANCH'"
			exit 1
		fi
	fi

	# Merge into BASE
	git_do checkout "$BASE_BRANCH" || die "Could not check out branch '$BASE_BRANCH'."

	if noflag squash; then
		if flag no_ff; then
			git_do merge --no-ff "$BRANCH"
		else
			if [ "$(git rev-list -n2 "$BASE_BRANCH..$BRANCH" | wc -l)" -eq 1 ]; then
				git_do merge --ff "$BRANCH"
			else
				git_do merge --no-ff "$BRANCH"
			fi
		fi
	else
		git_do merge --squash "$BRANCH"
		flag squash_info && gitflow_create_squash_message "Merged bugfix branch '$BRANCH'" "$BASE_BRANCH" "$BRANCH" > "$DOT_GIT_DIR/SQUASH_MSG"
		git_do commit
	fi

	if [ $? -ne 0 ]; then
		# Oops.. we have a merge conflict!
		# Write the given $BASE_BRANCH to a temporary file as we will
		# be needing it later.
		mkdir -p "$DOT_GIT_DIR/.gitflow"
		echo "$BASE_BRANCH" > "$DOT_GIT_DIR/.gitflow/MERGE_BASE"
		echo
		echo "There were merge conflicts. To resolve the merge conflict manually, use:"
		echo "    git mergetool"
		echo "    git commit"
		echo
		echo "You can then complete the finish by running it again:"
		echo "    git flow bugfix finish $NAME"
		echo
		exit 1
	fi

	run_post_hook "$NAME" "$ORIGIN" "$BRANCH"

	# When no merge conflict is detected, just clean up the bugfix branch
	gitflow_config_remove_base_branch "$BRANCH"
	helper_finish_cleanup
}

helper_finish_cleanup() {
	local keepmsg remotebranchdeleted localbranchdeleted

	# Sanity checks
	require_branch "$BRANCH"
	require_clean_working_tree

	remotebranchdeleted=$FLAGS_FALSE
	localbranchdeleted=$FLAGS_FALSE

	if flag push; then
		git_do push "$ORIGIN" "$BASE_BRANCH" || die "Could not push branch '$BASE_BRANCH' to remote '$ORIGIN'."
	fi

	if noflag keep; then

		# Always delete remote first
		if noflag keepremote;then
			if git_remote_branch_exists "$ORIGIN/$BRANCH"; then
				git_remote_branch_delete "$BRANCH" && remotebranchdeleted=$FLAGS_TRUE
			fi
		fi

		# Delete local after remote to avoid warnings
		if noflag keeplocal; then
			if [ "$BRANCH" = "$(git_current_branch)" ]; then
				git_do checkout "$BASE_BRANCH" || die "Could not check out branch '$BASE_BRANCH'."
			fi
			if flag force_delete; then
				git_do branch -D "$BRANCH" && localbranchdeleted=$FLAGS_TRUE
			else
				if noflag squash; then
					git_do branch -d "$BRANCH" && localbranchdeleted=$FLAGS_TRUE
				else
					git_do branch -D "$BRANCH" && localbranchdeleted=$FLAGS_TRUE
				fi
			fi
		fi

		# no more branches: we can safely remove config section
		if ! git_remote_branch_exists "$ORIGIN/$BRANCH" -a ! git_local_branch_exists "$BRANCH"; then
			gitflow_config_remove_base_section "$BRANCH"
		fi
	fi

	echo
	echo "Summary of actions:"
	echo "- The bugfix branch '$BRANCH' was merged into '$BASE_BRANCH'"
	#echo "- Merge conflicts were resolved"		# TODO: Add this line when it's supported
	if noflag keep; then
		if [ $localbranchdeleted -eq $FLAGS_TRUE ]; then
			keepmsg="has been locally deleted"
		else
			keepmsg="is still locally available"
		fi
		if [ $remotebranchdeleted -eq $FLAGS_TRUE ]; then
			keepmsg=$keepmsg"; it has been remotely deleted from '$ORIGIN'"
		elif git_remote_branch_exists "$ORIGIN/$BRANCH"; then
			keepmsg=$keepmsg"; it is still remotely available on '$ORIGIN'"
		fi
	else
		keepmsg="is still locally available"
		if git_remote_branch_exists "$ORIGIN/$BRANCH"; then
			keepmsg=$keepmsg"; it is still remotely available on '$ORIGIN'"
		fi
	fi
	echo "- bugfix branch '$BRANCH' "$keepmsg
	echo "- You are now on branch '$(git_current_branch)'"
	echo
}

cmd_publish() {
	OPTIONS_SPEC="\
git flow bugfix publish [-h] [<name>]

Publish bugfix branch <name> on $ORIGIN.
When <name> is omitted the current branch is used, but only if it's a bugfix branch.
--
h,help!          Show this help
showcommands!    Show git commands while executing them
"
	# Parse arguments
	parse_args "$@"

	# Use current branch if no name is given
	if [ "$NAME" = "" ]; then
		gitflow_use_current_branch_name
	fi


	# Sanity checks
	require_clean_working_tree
	require_branch "$BRANCH"
	git_do fetch -q "$ORIGIN" || die "Could not fetch branch '$BRANCH' from remote '$ORIGIN'."
	require_branch_absent "$ORIGIN/$BRANCH"

	run_pre_hook "$NAME" "$ORIGIN" "$BRANCH"

	# Create remote branch with remote tracking
	git_do push -u "$ORIGIN" "$BRANCH:$BRANCH"
	git_do fetch -q "$ORIGIN" "$BRANCH" || die "Could not fetch branch '$BRANCH' from remote '$ORIGIN'."
	git_do checkout "$BRANCH" || die "Could not check out branch '$BRANCH'."

	run_post_hook "$NAME" "$ORIGIN" "$BRANCH"

	echo
	echo "Summary of actions:"
	echo "- The remote branch '$BRANCH' was created or updated"
	echo "- The local branch '$BRANCH' was configured to track the remote branch"
	echo "- You are now on branch '$(git_current_branch)'"
	echo
}

cmd_track() {
	OPTIONS_SPEC="\
git flow bugfix track [-h] <name>

Start tracking bugfix <name> that is shared on $ORIGIN
--
h,help!          Show this help
showcommands!    Show git commands while executing them
"
	# Parse arguments
	parse_args "$@"

	gitflow_require_name_arg

	# Sanity checks
	require_clean_working_tree
	require_local_branch_absent "$BRANCH"

	run_pre_hook "$NAME" "$ORIGIN" "$BRANCH"

	git_do fetch -q "$ORIGIN" || die "Could not fetch branch '$BRANCH' from remote '$ORIGIN'."
	git_remote_branch_exists "$ORIGIN/$BRANCH"

	# Create tracking branch
	git_do checkout -b "$BRANCH" "$ORIGIN/$BRANCH" || die "Could not create '$BRANCH'."

	run_post_hook "$NAME" "$ORIGIN" "$BRANCH"

	echo
	echo "Summary of actions:"
	echo "- A new remote tracking branch '$BRANCH' was created"
	echo "- You are now on branch '$(git_current_branch)'"
	echo
}

cmd_diff() {
	OPTIONS_SPEC="\
git flow bugfix diff [-h] [<name|nameprefix>]

Show all changes in <name> that are not in the base
--
h,help!          Show this help
showcommands!    Show git commands while executing them
"
	local base

	# Parse arguments
	parse_args "$@"

	# Use current branch if no name is given
	if [ "$NAME" = "" ]; then
		gitflow_use_current_branch_name
	fi

	base=$(gitflow_config_get_base_branch $BRANCH)
	base=${base:-$DEVELOP_BRANCH}

	git_do diff "$base...$BRANCH"
}

cmd_checkout() {
	OPTIONS_SPEC="\
git flow bugfix checkout [-h] [<name|nameprefix>]

Switch to bugfix branch <name>
--
h,help!          Show this help
showcommands!    Show git commands while executing them
"
	# Parse arguments
	parse_args "$@"

	NAME=$(gitflow_resolve_nameprefix "$NAME" "$PREFIX")
	if [ $? -eq 0 ]; then
		BRANCH=$PREFIX$NAME
		git_do checkout "$BRANCH"  || die "Could not check out branch '$BRANCH'."
	fi
}

cmd_co() {
	# Alias for checkout
	cmd_checkout "$@"
}

cmd_rebase() {
	OPTIONS_SPEC="\
git flow bugfix rebase [-h] [-i] [-p] [<name|nameprefix>]

Rebase <name> on <base_branch>
--
h,help!                Show this help
showcommands!          Show git commands while executing them
i,[no]interactive      Do an interactive rebase
p,[no]preserve-merges  Preserve merges
"
	local opts

	# Define flags
	DEFINE_boolean 'interactive' false 'do an interactive rebase' i
	DEFINE_boolean 'preserve-merges' false 'try to recreate merges' p

	# Override defaults with values from config
	gitflow_override_flag_boolean   "bugfix.rebase.interactive"       "interactive"
	gitflow_override_flag_boolean   "bugfix.rebase.preserve-merges"   "preserve_merges"

	# Parse arguments
	parse_args "$@"

	# Use current branch if no name is given
	if [ "$NAME" = "" ]; then
		gitflow_use_current_branch_name
	fi


	BASE_BRANCH=$(gitflow_config_get_base_branch $BRANCH)
	BASE_BRANCH=${BASE_BRANCH:-$DEVELOP_BRANCH}

	warn "Will try to rebase '$NAME' which is based on '$BASE_BRANCH'..."
	if ! git_config_bool_exists "rebase.autostash"; then
		require_clean_working_tree
	fi
	require_branch "$BRANCH"

	git_local_branch_exists "$BASE_BRANCH" || die "The base '$BASE_BRANCH' doesn't exists locally or is not a branch. Can't rebase the bugfix branch '$BRANCH'."

	git_do checkout -q "$BRANCH"  || die "Could not check out branch '$BRANCH'."
	if flag interactive; then
		opts="$opts -i"
	fi
	if flag preserve_merges; then
		opts="$opts -p"
	fi
	git_do rebase $opts "$BASE_BRANCH"
}

avoid_accidental_cross_branch_action() {
	local current_branch

	current_branch=$(git_current_branch)
	if [ "$BRANCH" != "$current_branch" ]; then
		warn "Trying to pull from '$BRANCH' while currently on branch '$current_branch'."
		warn "To avoid unintended merges, git-flow aborted."
		return 1
	fi
	return 0
}

cmd_pull() {
	OPTIONS_SPEC="\
git flow bugfix pull [-h] <remote> [<name>]

Pull bugfix <name> from <remote>
--
h,help!          Show this help
showcommands!    Show git commands while executing them
"
	local current_branch

	# Define flags
	DEFINE_boolean 'rebase' false "pull with rebase" r

	warn "The command 'git flow bugfix pull' will be deprecated per version 2.0.0. Use 'git flow bugfix track' instead."

	# Parse arguments
	parse_remote_name "$@"

	if [ -z "$REMOTE" ]; then
		die "Name a remote explicitly."
	fi

	# Use current branch if no name is given
	if [ "$NAME" = "" ]; then
		gitflow_use_current_branch_name
	fi

	# To avoid accidentally merging different bugfix branches into each other,
	# die if the current bugfix branch differs from the requested $NAME
	# argument.
	current_branch=$(git_current_branch)
	if startswith "$current_branch" "$PREFIX"; then
		# We are on a local bugfix branch already, so $BRANCH must be equal to
		# the current branch
		avoid_accidental_cross_branch_action || die
	fi

	require_clean_working_tree

	run_pre_hook "$NAME" "$REMOTE" "$BRANCH"

	if git_local_branch_exists "$BRANCH"; then
		# Again, avoid accidental merges
		avoid_accidental_cross_branch_action || die

		# We already have a local branch called like this, so simply pull the
		# remote changes in
		if flag rebase; then
			if ! git_do pull --rebase -q "$REMOTE" "$BRANCH"; then
				warn "Pull was aborted. There might be conflicts during rebase or '$REMOTE' might be inaccessible."
				exit 1
			fi
		else
			git_do pull -q "$REMOTE" "$BRANCH" || die "Failed to pull from remote '$REMOTE'."
		fi

		echo "Pulled $REMOTE's changes into $BRANCH."
	else
		# Setup the local branch clone for the first time
		git_do fetch -q "$REMOTE" "$BRANCH" ||  die "Could not fetch branch '$BRANCH' from remote '$REMOTE'."     # Stores in FETCH_HEAD
		git_do branch --no-track "$BRANCH" FETCH_HEAD || die "Branch failed."
		git_do checkout -q "$BRANCH" || die "Could not check out branch '$BRANCH'."
		echo "Created local branch $BRANCH based on $REMOTE's $BRANCH."
	fi

	run_post_hook "$NAME" "$REMOTE" "$BRANCH"
}

cmd_delete() {
	OPTIONS_SPEC="\
git flow bugfix delete [-h] [-f] [-r] <name>

Delete a given bugfix branch
--
h,help!          Show this help
showcommands!    Show git commands while executing them
f,[no]force      Force deletion
r,[no]remote     Delete remote branch
"
	local current_branch

	# Define flags
	DEFINE_boolean 'force' false "force deletion" f
	DEFINE_boolean 'remote' false "delete remote branch" r

	# Override defaults with values from config
	gitflow_override_flag_boolean   "bugfix.delete.force"    "force"
	gitflow_override_flag_boolean   "bugfix.delete.remote"   "remote"

	# Parse arguments
	parse_args "$@"

	gitflow_require_name_arg

	# Sanity checks
	require_branch "$BRANCH"

	BASE_BRANCH=$(gitflow_config_get_base_branch $BRANCH)
	BASE_BRANCH=${BASE_BRANCH:-$DEVELOP_BRANCH}

	run_pre_hook "$NAME" "$ORIGIN" "$BRANCH"

	current_branch=$(git_current_branch)
	# We can't delete a branch we are on, switch to the develop branch.
	if [ "$BRANCH" = "$current_branch" ]; then
		require_clean_working_tree
		if git_local_branch_exists "$BASE_BRANCH"; then
			git_do checkout "$BASE_BRANCH"
		else
			git_do checkout "$DEVELOP_BRANCH" || die "Could not check out branch '$DEVELOP_BRANCH'."
		fi
	fi

	if git_is_branch_merged_into "$BRANCH" "$BASE_BRANCH"; then
		git_do branch -d "$BRANCH" || die "Could not delete the $BRANCH."
		if flag remote; then
			git_remote_branch_delete "$BRANCH"
		fi
	else
		if flag force; then
			git_do branch -D "$BRANCH" || die "Could not delete the $BRANCH."
			if flag remote; then
				git_remote_branch_delete "$BRANCH"
			fi
		else
			die "bugfix branch '$BRANCH' has been not been merged yet. Use -f to force the deletion."
		fi
	fi

	gitflow_config_remove_base_section "$BRANCH"
	run_post_hook "$NAME" "$ORIGIN" "$BRANCH"

	echo
	echo "Summary of actions:"
	echo "- bugfix branch '$BRANCH' has been deleted."
	flag remote && echo "- bugfix branch '$BRANCH' in '$ORIGIN' has been deleted."
	echo "- You are now on branch '$(git_current_branch)'"
	echo
}

cmd_rename() {
	OPTIONS_SPEC="\
git flow bugfix rename [<old_name>] <new_name>

Rename a given bugfix branch
--
h,help!          Show this help
showcommands!    Show git commands while executing them
"
	gitflow_rename_branch "$@"
}