sys/src/cmd/git/clone

   1 #!/bin/rc
   2 rfork en
   3 . /sys/lib/git/common.rc
   4
   5 flagfmt='d:debug, b:branch branch'; args='remote [local]'
   6 eval `''{aux/getflags $*} || exec aux/usage
   7 if(~ $debug 1)
   8         debug=(-d)
   9
  10 remote=`{echo $1 | sed  's@/*$@@'}
  11 local=$2
  12
  13 if(~ $#remote 0)
  14         exec aux/usage
  15 if(~ $#local 0)
  16         local=`{basename $remote .git}
  17 if(~ $#branch 1)
  18         branchflag=(-b $branch)
  19
  20 if(test -e $local)
  21         die 'repository already exists:' $local
  22
  23 fn clone{
  24         flag +e
  25         mkdir -p $local/.git
  26         mkdir -p $local/.git/fs
  27         mkdir -p $local/.git/objects/pack/
  28         mkdir -p $local/.git/refs/heads/
  29
  30         cd $local
  31
  32         >>.git/config {
  33                 echo '[remote "origin"]'
  34                 echo '  url='$remote
  35         }
  36         {git/fetch  $debug $branchflag $remote >[2=3] | awk '
  37                 BEGIN{
  38                         headref=""
  39                         if(ENVIRON["branch"] != "")
  40                                 headref="refs/remotes/origin/"ENVIRON["branch"]
  41                         headhash=""
  42                 }
  43                 /^symref / && headref == "" {
  44                         if($2 == "HEAD"){
  45                                 gsub("^refs/heads", "refs/remotes/origin", $3)
  46                                 gsub("^refs/tags", "refs/remotes/origin/tags", $3)
  47                         }
  48                 }
  49                 /^remote /{
  50                         if($2=="HEAD"){
  51                                 headhash=$3
  52                         }else if(match($2, "^refs/(heads|tags)/")){
  53                                 gsub("^refs/heads", "refs/remotes/origin", $2)
  54                                 if($2 == headref || (headref == "" && $3 == headhash))
  55                                         headref=$2
  56                                 outfile = ".git/" $2
  57                                 outdir = outfile
  58                                 gsub("/?[^/]*/?$", "", outdir)
  59                                 system("mkdir -p "outdir)
  60                                 print $3 > outfile
  61                                 close(outfile)
  62                         }
  63                 }
  64                 END{
  65                         if(headref != ""){
  66                                 remote = headref;
  67                                 refdir = headref;
  68                                 gsub("/?[^/]*/?$", "", refdir)
  69                                 gsub("^refs/remotes/origin", "refs/heads", headref)
  70                                 system("mkdir -p .git/"refdir);
  71                                 system("cp .git/" remote " .git/" headref)
  72                                 print "ref: " headref > ".git/HEAD"
  73                         }else if(headhash != ""){
  74                                 print "warning: detached head "headhash > "/fd/2"
  75                                 print headhash > ".git/HEAD"
  76                         }
  77                 }
  78         '} |[3] tr '\x0d' '\x0a' || die 'could not clone repository'
  79
  80         tree=.git/fs/HEAD/tree
  81         lbranch=`{git/branch}
  82         rbranch=`{echo $lbranch | subst 'heads' 'remotes/origin'}
  83         echo checking out repository...
  84         if(test -f .git/refs/$rbranch){
  85                 cp .git/refs/$rbranch .git/refs/$lbranch
  86                 git/fs
  87                 @ {builtin cd $tree && tar cif /fd/1 .} | @ {tar xf /fd/0} \
  88                         || die 'checkout failed:' $status
  89                 for(f in `$nl{walk -f $tree | drop $tree}){
  90                         idx=.git/index9/tracked/$f
  91                         mkdir -p `$nl{basename -d $idx}
  92                         walk -eq ./$f > $idx
  93                 }
  94         }
  95         if not{
  96                 echo no default branch >[1=2]
  97                 echo check out your code with git/branch >[1=2]
  98         }
  99 }
 100
 101 fn sigint {
 102         echo cancelled clone $remote: cleaning $local >[1=2]
 103         rm -rf $local
 104         exit interrupted
 105 }
 106
 107 @{clone}
 108 st=$status
 109 if(! ~ $st ''){
 110         echo failed to clone $remote: cleaning $local >[1=2]
 111         rm -rf $local
 112         exit $st
 113 }
 114 exit ''