shithub: git9

ref: 84c120a96312c5fdd73c3ae8f2cf7e0143e47206
dir: /merge/

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

fn merge{
	ourbr=$1/tree
	basebr=$2/tree
	theirbr=$3/tree

	all=`$nl{walk -f $ourbr $basebr $theirbr | \
		subst -g '^('$ourbr'|'$basebr'|'$theirbr')/*' | sort | uniq}
	for(f in $all){
		ours=$ourbr/$f
		base=$basebr/$f
		theirs=$theirbr/$f
		if(! test -f $ourbr/$f)
			ours=/dev/null
		if(! test -f $basebr/$f)
			base=/dev/null
		if(! test -f $theirbr/$f)
			theirs=/dev/null
		if(! ape/diff3 -m $ours $base $theirs > $f)
			echo merge needed: $f

		if(test -f $f)
			git/add $f
		if not
			git/rm $f
	}
}

gitup

flagfmt=''; args='theirs'
eval `''{aux/getflags $*} || exec aux/usage

if(! ~ $#* 1)
	exec aux/usage

theirs=`{git/query $1}
ours=`{git/query HEAD}
base=`{git/query $theirs ^ ' ' ^ $ours ^ '@'}

if(~ $base $theirs)
	die 'nothing to merge, doofus'
if(! git/walk -q)
	die 'dirty work tree, refusing to merge'
if(~ $base $ours){
	>[1=2] echo 'fast forwarding...'
	echo $theirs > .git/refs/`{git/branch}
	git/revert .
	exit ''
}
echo $ours >> .git/index9/merge-parents
echo $theirs >> .git/index9/merge-parents

merge /mnt/git/object/$ours /mnt/git/object/$base /mnt/git/object/$theirs
>[1=2] echo 'merge complete: remember to commit'
exit ''