plan9fox/sys/lib/git/common.rc
glenda 706aad3d94 git/branch: merge correct set of files
we were switching branches before we got the full list
of modified files, which could garble what we were trying
to merge.
2021-06-05 18:50:20 +00:00

96 lines
1.4 KiB
Plaintext

nl='
'
fn die{
>[1=2] echo $0: $*
exit $"*
}
fn usage{
>[1=2] echo -n 'usage:' $usage
exit 'usage'
}
# subst [-g] this [that]
fn subst{
awk 'BEGIN{
global = 0
for(i = 1; ARGV[i] ~ /^-/; i++){
if(ARGV[i] == "-g")
global = 1
ARGC--
}
this = ARGV[i++]; ARGC--
that = ARGV[i++]; ARGC--
}
{
if(global) gsub(this, that)
else sub(this, that)
print
}' $*
}
fn present {
if(~ $1 /dev/null && cmp $2 $3>/dev/null)
status=gone
if not if (~ $3 /dev/null && cmp $1 $2>/dev/null)
status=gone
if not
status=()
}
# merge1 out theirs base ours
fn merge1 {@{
rfork e
n=$pid
out=$1
ours=$2
base=$3
theirs=$4
tmp=$out.tmp
while(test -f $tmp){
tmp=$tmp.$n
n=`{echo $n + 1 | hoc}
}
if(! test -f $ours)
ours=/dev/null
if(! test -f $base)
base=/dev/null
if(! test -f $theirs)
theirs=/dev/null
if(! ape/diff3 -3 -m $ours $base $theirs > $tmp)
echo merge needed: $out >[1=2]
if(present $ours $base $theirs){
mv $tmp $out
git/add $out
}
if not {
rm -f $tmp $out
git/rm $out
}
}}
fn gitup{
gitroot=`{git/conf -r >[2]/dev/null}
if(~ $#gitroot 0)
die 'not a git repository'
gitfs=$gitroot/.git/fs
gitrel=`{pwd | subst '^'$"gitroot'/?'}
if(~ $#gitrel 0)
gitrel='.'
cd $gitroot
startfs=()
if(! test -d $gitfs)
mkdir -p $gitfs
if(! test -e $gitfs/ctl)
startfs=true
if(! grep -s '^repo '$gitroot'$' $gitfs/ctl >[2]/dev/null)
startfs=true
if(~ $#startfs 1)
git/fs
if not
status=''
}