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 not running in a git checkout, do nothing
  13 test "$command" = "ignore" && exit 0
  14
  15 test -z "$GIT" && GIT=$(command -v git)
  16
  17 cd "$(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), please disable automatic"
  25     echo "GIT submodule checkout with:"
  26     echo
  27     echo " $ ./configure --disable-download"
  28     echo
  29     echo "and then manually update submodules prior to running make, with:"
  30     echo
  31     echo " $ GIT='tsocks git' scripts/git-submodule.sh update $modules"
  32     echo
  33     exit 1
  34 }
  35
  36 validate_error() {
  37     if test "$1" = "validate"; then
  38         echo "GIT submodules checkout is out of date, and submodules"
  39         echo "configured for validate only. Please run"
  40         echo "  scripts/git-submodule.sh update $maybe_modules"
  41         echo "from the source directory or call configure with"
  42         echo "  --enable-download"
  43     fi
  44     exit 1
  45 }
  46
  47 check_updated() {
  48     local CURSTATUS OLDSTATUS
  49     CURSTATUS=$($GIT submodule status $module)
  50     OLDSTATUS=$(grep $module $substat)
  51     test "$CURSTATUS" = "$OLDSTATUS"
  52 }
  53
  54 if test -n "$maybe_modules" && ! test -e ".git"
  55 then
  56     echo "$0: unexpectedly called with submodules but no git checkout exists"
  57     exit 1
  58 fi
  59
  60 if test -n "$maybe_modules" && test -z "$GIT"
  61 then
  62     echo "$0: unexpectedly called with submodules but git binary not found"
  63     exit 1
  64 fi
  65
  66 modules=""
  67 for m in $maybe_modules
  68 do
  69     $GIT submodule status $m 1> /dev/null 2>&1
  70     if test $? = 0
  71     then
  72         modules="$modules $m"
  73     else
  74         echo "warn: ignoring non-existent submodule $m"
  75     fi
  76 done
  77
  78 case "$command" in
  79 status|validate)
  80     test -f "$substat" || validate_error "$command"
  81     test -z "$maybe_modules" && exit 0
  82     for module in $modules; do
  83         check_updated $module || validate_error "$command"
  84     done
  85     exit 0
  86     ;;
  87 update)
  88     test -e $substat || touch $substat
  89     test -z "$maybe_modules" && exit 0
  90
  91     $GIT submodule update --init $modules 1>/dev/null
  92     test $? -ne 0 && update_error "failed to update modules"
  93     for module in $modules; do
  94         check_updated $module || echo Updated "$module"
  95     done
  96
  97     (while read -r; do
  98         for module in $modules; do
  99             case $REPLY in
 100                 *" $module "*) continue 2 ;;
 101             esac
 102         done
 103         printf '%s\n' "$REPLY"
 104     done
 105     $GIT submodule status $modules
 106     test $? -ne 0 && update_error "failed to save git submodule status" >&2) < $substat > $substat.new
 107     mv -f $substat.new $substat
 108     ;;
 109 esac
 110
 111 exit 0