hooks/pre-receive

   1 #!/bin/sh
   2 #
   3 # Keep track of the last time we modified the object store
   4 #
   5 # Beware, we MAY be running in a chroot!
   6
   7 set -e
   8
   9 var_xargs_r=@var_xargs_r@
  10
  11 # Some platforms' broken xargs runs the command always at least once even if
  12 # there's no input unless given a special option.  Automatically supply the
  13 # option on those platforms by providing an xargs function.
  14 xargs() { command xargs $var_xargs_r "$@"; }
  15
  16 git config gitweb.lastreceive "$(date '+%a, %d %b %Y %T %z')"
  17
  18 # Read the incoming refs and freshen old loose objects
  19 # If we waited until post-receive a gc could have already nuked them
  20 # We freshen the new ref in case it's being resurrected to protect it from gc
  21 # We probably do not need to do it for new refs as Git tries to do that,
  22 # but since we're already doing it for old refs (which Git does not do),
  23 # it's almost no extra work for new refs, just in case.  We also attempt
  24 # to make all packs user and group writable so they can be touched later.
  25
  26 octet='[0-9a-f][0-9a-f]'
  27 octet4="$octet$octet$octet$octet"
  28 octet20="$octet4$octet4$octet4$octet4$octet4"
  29 {
  30         find objects/pack -maxdepth 1 -type f \! -perm -ug+w \
  31                 -name "pack-$octet20.pack" -print0 | \
  32         xargs -0 chmod ug+w
  33 } 2>/dev/null || :
  34
  35 while read -r old new ref; do
  36         oldp=
  37         newp=
  38         if [ "$old" != "0000000000000000000000000000000000000000" ]; then
  39                 # freshen mod time on recently unref'd loose objects
  40                 fn="${old#??}"
  41                 shard="${old%$fn}"
  42                 oldp="objects/$shard/$fn"
  43         fi
  44         if [ "$new" != "0000000000000000000000000000000000000000" ]; then
  45                 # prevent imminent pruning of a ref being resurrected
  46                 fn="${new#??}"
  47                 shard="${new%$fn}"
  48                 newp="objects/$shard/$fn"
  49         fi
  50         chmod ug+w $oldp $newp 2>/dev/null || :
  51         touch -c $oldp $newp 2>/dev/null || :
  52 done