jobd/generate-auto-gc-update.sh

   1 #!/bin/sh
   2
   3 # This script is designed to be run either directly giving it a project
   4 # name or by being sourced from one of the other scripts.
   5
   6 # When sourced from another script the current directory must be set
   7 # to the top-level --git-dir of the project to operate on and the
   8 # _shlib_done variable must be set to 1 and then after sourcing the
   9 # generate_auto_gc_update function must be called
  10
  11 # If GIROCCO_SUPPRESS_AUTO_GC_UPDATE is set to a non-zero value then this
  12 # script will always exit immediately with success without doing anything
  13
  14 if [ -z "$_shlib_done" ]; then
  15         [ "${GIROCCO_SUPPRESS_AUTO_GC_UPDATE:-0}" = "0" ] || exit 0
  16
  17         . @basedir@/shlib.sh
  18
  19         set -e
  20
  21         if [ $# -ne 1 ]; then
  22                 echo "Usage: generate-auto-gc-update.sh projname" >&2
  23                 exit 1
  24         fi
  25
  26         proj="${1%.git}"
  27         shift
  28         cd "$cfg_reporoot/$proj.git"
  29         unset GIROCCO_SUPPRESS_AUTO_GC_UPDATE
  30 fi
  31
  32 # See the table from maintain-auto-gc-hack.sh
  33 # We test the same conditions here
  34 generate_auto_gc_update() {
  35         [ "${GIROCCO_SUPPRESS_AUTO_GC_UPDATE:-0}" = "0" ] || return 0
  36         _hackon=
  37         if
  38                 [ "${cfg_autogchack:-0}" != "0" ] &&
  39                 { [ "$cfg_autogchack" != "mirror" ] || ! [ -e .nofetch ]; } &&
  40                 [ "$(git config --get --bool girocco.autogchack 2>/dev/null)" != "false" ]
  41         then
  42                 _hackon=1
  43         fi
  44         [ -n "$_hackon" ] || return 0
  45         # It's not our responsibility to create the initial .refs-last file
  46         # But we do need one, so make sure it exists
  47         [ -f .refs-last ] || >>.refs-last
  48         # This works like a combination of update.sh and pre-receive and post-receive
  49         git for-each-ref --format '%(refname) %(objectname)' | LC_ALL=C sort -b -k1,1 >.refs-new.$$
  50         refschanged=
  51         cmp -s .refs-last .refs-new.$$ || refschanged=1
  52         sockpath="$cfg_chroot/etc/taskd.socket"
  53         if [ -n "$refschanged" ]; then
  54                 config_set lastreceive "$(date '+%a, %d %b %Y %T %z')"
  55                 # See comments in hooks/pre-receive about this
  56                 lognamets="$(TZ=UTC strftime '%Y%m%d_%H%M%S%N')"
  57                 lognamets="${lognamets%???}"
  58                 loghhmmss="${lognamets##*_}"
  59                 loghhmmss="${loghhmmss%??????}"
  60                 logname="reflogs/$lognamets.$$"
  61                 lognametmp="reflogs/tmp_$lognamets.$$"
  62                 v_get_proj_from_dir proj && proj="${proj%.git}"
  63                 {
  64                         echo "ref-changes %@local% $proj"
  65                         LC_ALL=C join .refs-last .refs-new.$$ |
  66                         LC_ALL=C sed -e '/^[^ ][^ ]* \([^ ][^ ]*\) \1$/d' |
  67                                 while read ref old new; do
  68                                         echo "$loghhmmss $old $new $ref" >&3
  69                                         echo "$old $new $ref"
  70                                 done
  71                         LC_ALL=C join -v 1 .refs-last .refs-new.$$ |
  72                                 while read ref old; do
  73                                         echo "$loghhmmss $old 0000000000000000000000000000000000000000 $ref" >&3
  74                                         echo "$old 0000000000000000000000000000000000000000 $ref"
  75                                 done
  76                         LC_ALL=C join -v 2 .refs-last .refs-new.$$ |
  77                                 while read ref new; do
  78                                         echo "$loghhmmss 0000000000000000000000000000000000000000 $new $ref" >&3
  79                                         echo "0000000000000000000000000000000000000000 $new $ref"
  80                                 done
  81                         LC_ALL=C join .refs-last .refs-new.$$ |
  82                         LC_ALL=C sed -ne '/^refs\/heads\/[^ ][^ ]* \([^ ][^ ]*\) \1$/p' |
  83                                 while read ref old new; do
  84                                         echo "$old $new $ref"
  85                                 done
  86                         echo "done ref-changes %@local% $proj"
  87                 } >.refs-temp.$$ 3>>"$lognametmp"
  88                 mv "$lognametmp" "$logname"
  89                 if [ -S "$sockpath" ]; then
  90                         trap ':' PIPE
  91                         nc_openbsd -w 15 -U "$sockpath" <.refs-temp.$$ || :
  92                         trap - PIPE
  93                 fi
  94                 mv -f .refs-new.$$ .refs-last
  95                 config_set lastchange "$(date '+%a, %d %b %Y %T %z')"
  96                 git for-each-ref --sort=-committerdate --format='%(committerdate:iso8601)' \
  97                         --count=1 refs/heads >info/lastactivity
  98                 ! [ -d htmlcache ] || { >htmlcache/changed; } 2>/dev/null || :
  99                 check_and_set_needsgc
 100                 rm -f .delaygc .allowgc
 101         fi
 102         rm -f .refs-new.$$ .refs-temp.$$
 103 }
 104
 105 [ -n "$_shlib_done" ] || generate_auto_gc_update