shithub: git9

ref: 65e7c353bca28ba6bf0b4cceb387373e853e628a
dir: git9/export

#!/bin/rc
rfork ne
. /sys/lib/git/common.rc

usage='
	git/export [-o patchdir] [query]
'

gitup
ramfs

stdout='true'
patchdir='.'
while(~ $1 -* && ! ~ $1 --){
	switch($1){
	case -o
		stdout='false'
		shift; patchdir=$1
		if(! test -d $patchdir)
			mkdir -p $patchdir
	}
	shift
}
if(~ $1 --)
	shift

q=$*
if(~ $#q 0)
	q=HEAD
commits=`{git/query $q || die $status}
n=1
m=$#commits
mntgen /mnt/scratch
for(c in $commits){
	cp=`{git/query -p $c}
	pp=`{git/query -p $c'^'}

	@{
		rfork n
		cd /mnt/scratch
		bind $pp/tree a
		bind $cp/tree b
		
		echo From $c
		echo From: `{cat $cp/author}
		echo Date: `{date -m `{mtime $cp/author | awk '{print $1}'}}
		<$cp/msg awk '
		BEGIN {RS = ""; FS = "\n"}
		NR == 1 {
			n = ENVIRON["n"]
			m = ENVIRON["m"]
			if(m > 1)
				patch = sprintf("[PATCH %d/%d]", n, m)
			else
				patch = "[PATCH]"
			printf "Subject: %s", patch
			for(i = 1; i <= NF; i++)
				msg = msg " " $i
			printf "%s\n\n", msg
			
			gsub("^[ 	]|[ 	]$", "", msg)
			gsub("[/ 	]", "-", msg)
			printf "%.4d-%s.patch", n, msg >"/tmp/patchname"
			next
		}
		{print; printf "\n"}'
		ape/diff -urN a b
	} >/tmp/patchfile
	if(~ $stdout true){
		cat /tmp/patchfile
		! ~ $n $m && echo
	}
	if not
		mv /tmp/patchfile $patchdir/`{cat /tmp/patchname}
	n=`{echo $n + 1 | bc}
}