ref: 20a1d2268d69a0bbe66d0f21999649133878377c
dir: /sys/src/cmd/git/pull/
#!/bin/rc -e
rfork en
. /sys/lib/git/common.rc
fn update{
upstream=$1
url=$2
dir=$3
dflag=()
if(! ~ $#debug 0)
dflag='-d'
{git/get $dflag -u $upstream $url >[2=3] || die $status} | awk '
/^remote/{
if($2=="HEAD")
next
ref=$2
hash=$3
gsub("^refs/heads", "refs/remotes/'$upstream'", ref)
outfile = ".git/"ref
system("mkdir -p `{basename -d "outfile"}");
print hash > outfile;
close(outfile);
}
' |[3] tr '\x0d' '\x0a'
}
gitup
flagfmt='d:debug, q:quiet, f:fetchonly,
u:upstream upstream'
args=''
eval `''{aux/getflags $*} || exec aux/usage
if(~ $#upstream 0)
upstream=origin
remote=`$nl{git/conf 'remote "'$upstream'".url'}
if(~ $#remote 0){
remote=$upstream
upstream=THEM
}
update $upstream $remote
if (~ $fetchonly 1)
exit
local=`{git/branch}
remote=`{git/branch | subst '^(refs/)?heads' 'remotes/'$upstream}
# we have local commits, but the remote hasn't changed.
# in this case, we want to keep the local commits untouched.
if(~ `{git/query HEAD $remote @} `{git/query $remote}){
echo 'up to date' >[1=2]
exit
}
# The remote repository and our HEAD have diverged: we
# need to merge.
if(! ~ `{git/query HEAD $remote @} `{git/query HEAD}){
>[1=2]{
echo ours: `{git/query HEAD}
echo theirs: `{git/query $remote}
echo common: `{git/query HEAD $remote @}
echo git/merge $remote
}
exit diverged
}
# The remote is directly ahead of the local, and we have
# no local commits that need merging.
if(~ $#quiet 0)
git/log -s -e $local'..'$remote
echo $remote':' `{git/query $local} '=>' `{git/query $remote}
git/branch -mnb $remote $local
exit ''