#!/bin/sh
#
# Copyright (c) Josef "Jeff" Sipek, 2007
#

USAGE="[<hash> | <since>..[<until>] | ..<until>]"
. `dirname $0`/guilt

if [ $# -ne 1 ] || [ -z "$1" ]; then
	die "You must specify a range of commits"
fi

rhash=`munge_hash_range $1`

# make sure that there are no unapplied changes
if ! must_commit_first; then
	die "Uncommited changes detected. Refresh first."
fi

echo "About to begin conversion..." >&2
echo "Current head: `cat $GIT_DIR/refs/heads/$branch`" >&2

for rev in `git-rev-list $rhash`; do
	s=`git-log --pretty=oneline -1 $rev | cut -c 42-`

	fname=`echo $s | sed -e "s/&/and/g" -e "s/[ :]/_/g" -e "s,[/\\],-,g" \
			-e "s/['\\[{}]//g" -e 's/]//g' | tr A-Z a-z`

	echo "Converting `echo $rev | cut -c 1-8` as $fname"

	mangle_prefix=1
	fname_base=$fname
	while [ -f "$GUILT_DIR/$branch/$fname" ]; do
		fname="$fname_base-$mangle_prefix"
	        mangle_prefix=`expr $mangle_prefix + 1`
		echo "Patch under that name exists...trying '$fname'"
	done

	(
		do_make_header $rev
		echo ""
		git-diff $rev^..$rev
	) > $GUILT_DIR/$branch/$fname

	# FIXME: grab the GIT_AUTHOR_DATE from the commit object and set the
	# timestamp on the patch

	# insert the patch name into the series file
	series_insert_patch $fname

	# Only reset if the commit was on this branch
	if head_check $rev 2> /dev/null; then
		# BEWARE: git-reset ahead! Is there a way to verify that we really
		# created a patch? - We don't want to lose any history.
		git-reset --hard $rev^ > /dev/null
	elif [ -z "$warned" ]; then
		echo "Warning: commit $rev is not the HEAD...preserving commit" >&2
		echo "Warning: (this message is displayed only once)" >&2
		warned=t
	fi
done

echo "Done." >&2
echo "Current head: `cat $GIT_DIR/refs/heads/$branch`" >&2

