LXR qemu/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
   6substat=".git-submodule-status"
   7
   8command=$1
   9shift
  10maybe_modules="$@"
  11
  12# if --with-git-submodules=ignore, do nothing
  13test "$command" = "ignore" && exit 0
  14
  15test -z "$GIT" && GIT=git
  16
  17cd "$(dirname "$0")/.."
  18
  19update_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
  41validate_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  43        echo "GIT submodules checkout is out of date, and submodules"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
  54modules=""
  55for m in $maybe_modules
  56do
  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 $m"
  63    fi
  64done
  65
  66if test -n "$maybe_modules" && ! test -e ".git"
  67then
  68    echo "$0: unexpectedly called with submodules but no git checkout exists"
  69    exit 1
  70fi
  71
  72case "$command" in
  73status|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    ;;
  89update)
  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    ;;
 102esac
 103
 104exit 0
 105