#!/bin/sh

# Copyright (c) 2013, 2014 Michele Bini

# This program is free software: you can redistribute it and/or modify

# it under the terms of the version 3 of the GNU General Public License

# as published by the Free Software Foundation.

# This program is distributed in the hope that it will be useful, but

# WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

# General Public License for more details.

# You should have received a copy of the GNU General Public License

# along with this program. If not, see <http://www.gnu.org/licenses/>.

set -e

println() {

printf "%s\n" "$*"

}

warn() {

println "$0: $*" >&2

}

die() {

warn "$*"

exit 1

}

toascii() {

if which uni2ascii >/dev/null 2>&1; then

uni2ascii -qBP

else

cat

fi

}

namecommit() {

(git show "$1"|git patch-id|head --bytes=7; git show "$1"|head -n5|tail -n1)|toascii|sed -E "; s/[^a-zA-Z0-9]+/ /g; s/^ //; s/ $//; s/ /-/g"|head --bytes=40|tr A-Z a-z|sed "s/-$//"

}

branchname() {

git branch|sed -n "s/[*] //p"

}

selectbranch() {

git symbolic-ref HEAD refs/heads/"$1"

}

noerr() {

"$@" 2>/dev/null

}

# Top level of the work tree, if possible relative to current directory

topleveldir="$(noerr git rev-parse --show-cdup || noerr git rev-parse --show-toplevel)"

# Current directory, relative to top level of work tree

prefixdir="$(noerr git rev-parse --show-prefix)"

withfinalslash() {

if [ -z "$1" ]; then return; fi

case "$1" in

*/) println "$1" ;;

*) println "$1"/ ;;

esac

}

topleveldir="$(withfinalslash "$topleveldir")"

prefixdir="$(withfinalslash "$prefixdir")"

f="$(namecommit HEAD)"

[ -z "f" ] && die "Internal error: Could not create patch name"

f="$f".patch

# gitdir="$(git rev-parse --git-dir)"

# t="$(git rev-parse --show-toplevel)"

# cd "$t"

git format-patch --binary -M70% -C70% -N -1 --stdout >"$f"

b="$(branchname)"

f="$prefixdir$f"

git checkout --quiet --detach HEAD^

println "Uncommit: $f"

println "Uncommit: $f" >>"$topleveldir".uncommitted-patches

[ -n "$b" ] && selectbranch "$b" && git reset --soft HEAD^