shithub: git9

ref: 12407c20b7b6788307cbbea0251e4f2f338d629b
dir: /branch/

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

gitup

flagfmt='a:listall, b:baseref ref, d:delete, n:newbr, s:stay'
args='[branch]'
eval `''{aux/getflags $*} || exec aux/usage

modified=()
deleted=()

if(~ $#* 0){
	if(~ $#listall 0)
		awk '$1=="branch"{print $2}' < /mnt/git/ctl
	if not
		cd .git/refs/ && walk -f heads remotes
	exit
}
if(! ~ $#* 1)
	exec aux/usage

branch=$1
if(~ $branch refs/heads/*)
	new=$name
if not if(~ $branch heads/*)
	new=refs/$branch
if not
	new=refs/heads/$branch

if (~ $#baseref 1)
	base=`{git/query $baseref} || exit 'bad base'
if not if(test -e .git/$new)
	base=`{git/query $new}
if not
	base=`{git/query HEAD}

modified=`$nl{git/query -c HEAD $base | grep '^[^-]' | subst '^..'}
deleted=`$nl{git/query -c HEAD $base | grep '^-' | subst '^..'}

if(! ~ $#modified 0 || ! ~ $#deleted 0){
	if(! git/walk -q $modified $deleted){
		git/walk -fRMA $modified $deleted
		die 'uncommited changes would be clobbered'
	}
}
if(~ $delete 1){
	rm -f .git/$new
	echo 'deleted branch' $new
	exit
}
if(~ $#newbr 0){
	if(! test -e .git/$new)
		die could not find branch $branch
	if(! ~ $#baseref 0)
		die update would clobber $branch with $baseref
}
commit=`{git/query $base} || die 'branch does not exist:' $base
echo updating $new to $commit

if(~ $new */*)
	mkdir -p .git/`{basename -d $new}

echo $commit > .git/$new


if(! ~ $#stay 0)
	exit

if(! ~ $#modified 0){
	basedir=`{git/query -p $base}
	for(m in $modified){
		d=`{basename -d $m}
		mkdir -p $d
		mkdir -p .git/index9/tracked/$d
		# Modifications can turn a file into
		# a directory, or vice versa, so we
		# need to delete and copy the files
		# over. If we're checking out a
		a=`{test -f $m && echo file || echo dir}
		b=`{test -f $basedir/tree/$m && echo file || echo dir}
		if(! ~ $a $b){
			rm -rf $m
			rm -rf .git/index9/tracked/$m
		}
		if(test -f $basedir/tree/$m){
			cp  $basedir/tree/$m $m
			walk -eq $m > .git/index9/tracked/$m
		}
	}
}
if(! ~ $#deleted 0){
	rm -f $deleted
	rm -f .git/index9/tracked/$deleted
}

echo ref: $new > .git/HEAD
exit ''