#! /bin/bash

#  This script is free software; you can redistribute it and/or modify
#  it under the terms of the GNU General Public License version 2 as
#  published by the Free Software Foundation.
#
#  See the COPYING and AUTHORS files for more details.

# Read in library functions
if [ "$(type -t patch_file_name)" != function ]
then
	if ! [ -r /usr/share/quilt/scripts/patchfns ]
	then
		echo "Cannot read library /usr/share/quilt/scripts/patchfns" >&2
		exit 1
	fi
	. /usr/share/quilt/scripts/patchfns
fi

usage()
{
	printf $"Usage: quilt push [-afqv] [--leave-rejects] [num|patch]\n"
	if [ x$1 = x-h ]
	then
		printf $"
Apply patch(es) from the series file.  Without options, the next patch
in the series file is applied.  When a number is specified, apply the
specified number of patches.  When a patch name is specified, apply
all patches up to and including the specified patch.  Patch names may
include the patches/ prefix, which means that filename completion can
be used.

-a	Apply all patches in the series file.

-f	Force apply, even if the patch has rejects.

-q	Quiet operation.

-v	Verbose operation.

--leave-rejects
	Leave around the reject files patch produced, even if the patch
	is not actually applied.

--interactive
	Allow the patch utility to ask how to deal with conflicts. If
	this option is not given, the option -f will be passed to the 
	patch program.
"
		exit 0
	else
		exit 1
	fi
}

list_patches()
{
	local top=$(top_patch) n=0 patch
	if [ -n "$top" ]
	then
		patches_after $top
	else
		cat_series
	fi \
	| if [ -n "$opt_all" ]
	then
		cat
	else
		while read patch
		do
			if [ -n "$number" ]
			then
				if [ $n -eq $number ]
				then
					break
				fi
				n=$[$n+1]
			fi
			echo $patch
			if [ $patch = "$stop_at_patch" ]
			then
				break
			fi
		done
		if [ -n "$stop_at_patch" -a "$patch" != "$stop_at_patch" ]
		then
			printf $"Patch %s not found in file series\n" \
			       "$stop_at_patch" >&2
			return 1
		fi
	fi
}

options=`getopt -o fqvah --long leave-rejects,interactive -- "$@"`

if [ $? -ne 0 ]
then
        usage
fi

eval set -- "$options"

while true
do
        case "$1" in
        -f)
                opt_force=1
		shift ;;
        -q)
                opt_quiet=1
		shift ;;
	-v)
		opt_verbose=1
		shift ;;
	-a)
		opt_all=1
		shift ;;
	-h)
		usage -h ;;
	--leave-rejects)
		opt_leave_rejects=1
		shift ;;
	--interactive)
		opt_interactive=1
		shift ;;
        --)
                shift
		break ;;
        esac
done

if [ $# -gt 1 -o \( -n "$opt_all" -a $# -ne 0 \) ]
then
        usage
fi

if [ $# -eq 1 ]
then
	if is_numeric $1
	then
		number=$1
	else
		if ! stop_at_patch=$(find_patch $1)
		then
			printf $"Patch %s is not in series\n" "$1" >&2
			exit 1
		fi
	fi
else
	[ -z "$opt_all" ] && number=1
fi

[ -n "$opt_force" ] &&
	apatch_options="$apatch_options -f"
[ -n "$opt_quiet" ] &&
	apatch_options="$apatch_options -q"
[ -n "$opt_verbose" ] &&
	apatch_options="$apatch_options -v"
[ -n "$opt_leave_rejects" ] &&
	apatch_options="$apatch_options --leave-rejects"
[ -n "$opt_interactive" ] &&
	apatch_options="$apatch_options --interactive"

if [ -n "$stop_at_patch" ]
then
	if is_applied $stop_at_patch
	then
		printf $"Patch %s is already applied\n" \
		       "$(print_patch $stop_at_patch)" >&2
		exit 1
	fi
fi

if ! patches=$(list_patches) 2>&1
then
	exit 1
elif [ -z "$patches" ]
then
	top=$(top_patch)
	if [ -z "$top" ]
	then
		printf $"No patches applied\n" >&2
		exit 2
	elif [ -z "$(patch_file_name $top)" ]
	then
		printf \
$"The topmost patch %s is not in the series file anymore;
cannot determine the next patch from the series file.
Please pop -f the top patch and check your series file.\n" "$top" >&2
		exit 1

	else
		printf $"File series fully applied, ends at patch %s\n" "$top" >&2
		exit 2
	fi
fi

trap "interrupted=1" SIGINT

create_db
for patch in $patches
do
	[ -n "$SUBDIR" ] && pushd $SUBDIR > /dev/null
	if ! /usr/share/quilt/scripts/apatch $apatch_options $patch
	then
		exit 1
	fi
	[ -n "$SUBDIR" ] && popd > /dev/null
	if [ -n "$interrupted" ]
	then
		printf $"Interrupted by user\n" >&2
		exit 1
	fi
	[ -z "$opt_quiet" ] && echo
done

patch="$(top_patch)"
if [ -z "$patch" ]
then
	printf $"No patches applied\n"
else
	printf $"Now at patch %s\n" "$(print_patch $patch)"
fi
### Local Variables:
### mode: shell-script
### End:
# vim:filetype=sh
