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=$1
   9 shift
  10 modules="$@"
  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-sbumodule.sh update $modules"
  32     echo
  33     exit 1
  34 }
  35
  36 if test -z "$modules"
  37 then
  38     test -e $substat || touch $substat
  39     exit 0
  40 fi
  41
  42 if ! test -e ".git"
  43 then
  44     echo "$0: unexpectedly called with submodules but no git checkout exists"
  45     exit 1
  46 fi
  47
  48 case "$command" in
  49 status)
  50     test -f "$substat" || exit 1
  51     CURSTATUS=`$GIT submodule status $modules`
  52     OLDSTATUS=`cat $substat`
  53     test "$CURSTATUS" = "$OLDSTATUS"
  54     exit $?
  55     ;;
  56 update)
  57     $GIT submodule update --init $modules 1>/dev/null
  58     test $? -ne 0 && error "failed to update modules"
  59
  60     $GIT submodule status $modules > "${substat}"
  61     test $? -ne 0 && error "failed to save git submodule status" >&2
  62     ;;
  63 esac
  64
  65 exit 0