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 # if --with-git-submodules=ignore, do nothing
  13 test "$command" = "ignore" && exit 0
  14
  15 test -z "$GIT" && GIT=git
  16
  17 cd "$(dirname "$0")/.."
  18
  19 update_error() {
  20     echo "$0: $*"
  21     echo
  22     echo "Unable to automatically checkout GIT submodules '$modules'."
  23     echo "If you require use of an alternative GIT binary (for example to"
  24     echo "enable use of a transparent proxy), then please specify it by"
  25     echo "running configure by with the '--with-git' argument. e.g."
  26     echo
  27     echo " $ ./configure --with-git='tsocks git'"
  28     echo
  29     echo "Alternatively you may disable automatic GIT submodule checkout"
  30     echo "with:"
  31     echo
  32     echo " $ ./configure --with-git-submodules=validate"
  33     echo
  34     echo "and then manually update submodules prior to running make, with:"
  35     echo
  36     echo " $ scripts/git-submodule.sh update $modules"
  37     echo
  38     exit 1
  39 }
  40
  41 validate_error() {
  42     if test "$1" = "validate"; then
  43         echo "GIT submodules checkout is out of date, and submodules"
  44         echo "configured for validate only. Please run"
  45         echo "  scripts/git-submodule.sh update $maybe_modules"
  46         echo "from the source directory or call configure with"
  47         echo "  --with-git-submodules=update"
  48         echo "To disable GIT submodules validation, use"
  49         echo "  --with-git-submodules=ignore"
  50     fi
  51     exit 1
  52 }
  53
  54 modules=""
  55 for m in $maybe_modules
  56 do
  57     $GIT submodule status $m 1> /dev/null 2>&1
  58     if test $? = 0
  59     then
  60         modules="$modules $m"
  61     else
  62         echo "warn: ignoring non-existent submodule $m"
  63     fi
  64 done
  65
  66 if test -n "$maybe_modules" && ! test -e ".git"
  67 then
  68     echo "$0: unexpectedly called with submodules but no git checkout exists"
  69     exit 1
  70 fi
  71
  72 case "$command" in
  73 status|validate)
  74     if test -z "$maybe_modules"
  75     then
  76          test -s ${substat} && validate_error "$command" || exit 0
  77     fi
  78
  79     test -f "$substat" || validate_error "$command"
  80     for module in $modules; do
  81         CURSTATUS=$($GIT submodule status $module)
  82         OLDSTATUS=$(cat $substat | grep $module)
  83         if test "$CURSTATUS" != "$OLDSTATUS"; then
  84             validate_error "$command"
  85         fi
  86     done
  87     exit 0
  88     ;;
  89 update)
  90     if test -z "$maybe_modules"
  91     then
  92         test -e $substat || touch $substat
  93         exit 0
  94     fi
  95
  96     $GIT submodule update --init $modules 1>/dev/null
  97     test $? -ne 0 && update_error "failed to update modules"
  98
  99     $GIT submodule status $modules > "${substat}"
 100     test $? -ne 0 && update_error "failed to save git submodule status" >&2
 101     ;;
 102 esac
 103
 104 exit 0