scripts/git-submodule.sh

   1 #!/bin/sh
   2 #
   3 # This code is licensed under the GPL version 2 or later.  See
   4 # the COPYING file in the top-level directory.
   5
   6 substat=".git-submodule-status"
   7
   8 command=$1
   9 shift
  10 maybe_modules="$@"
  11
  12 test -z "$GIT" && GIT=git
  13
  14 error() {
  15     echo "$0: $*"
  16     echo
  17     echo "Unable to automatically checkout GIT submodules '$modules'."
  18     echo "If you require use of an alternative GIT binary (for example to"
  19     echo "enable use of a transparent proxy), then please specify it by"
  20     echo "running configure by with the '--with-git' argument. e.g."
  21     echo
  22     echo " $ ./configure --with-git='tsocks git'"
  23     echo
  24     echo "Alternatively you may disable automatic GIT submodule checkout"
  25     echo "with:"
  26     echo
  27     echo " $ ./configure --disable-git-update"
  28     echo
  29     echo "and then manually update submodules prior to running make, with:"
  30     echo
  31     echo " $ scripts/git-submodule.sh update $modules"
  32     echo
  33     exit 1
  34 }
  35
  36 modules=""
  37 for m in $maybe_modules
  38 do
  39     $GIT submodule status $m 1> /dev/null 2>&1
  40     if test $? = 0
  41     then
  42         modules="$modules $m"
  43     else
  44         echo "warn: ignoring non-existent submodule $m"
  45     fi
  46 done
  47
  48 if test -n "$maybe_modules" && ! test -e ".git"
  49 then
  50     echo "$0: unexpectedly called with submodules but no git checkout exists"
  51     exit 1
  52 fi
  53
  54 case "$command" in
  55 status)
  56     if test -z "$maybe_modules"
  57     then
  58          test -s ${substat} && exit 1 || exit 0
  59     fi
  60
  61     test -f "$substat" || exit 1
  62     CURSTATUS=$($GIT submodule status $modules)
  63     OLDSTATUS=$(cat $substat)
  64     test "$CURSTATUS" = "$OLDSTATUS"
  65     exit $?
  66     ;;
  67 update)
  68     if test -z "$maybe_modules"
  69     then
  70         test -e $substat || touch $substat
  71         exit 0
  72     fi
  73
  74     $GIT submodule update --init $modules 1>/dev/null
  75     test $? -ne 0 && error "failed to update modules"
  76
  77     $GIT submodule status $modules > "${substat}"
  78     test $? -ne 0 && error "failed to save git submodule status" >&2
  79     ;;
  80 esac
  81
  82 exit 0