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 "$maybe_modules" && exit 0
  13 test -z "$GIT" && GIT=$(command -v git)
  14
  15 cd "$(dirname "$0")/.."
  16
  17 no_git_error=
  18 if ! test -e ".git"; then
  19     no_git_error='no git checkout exists'
  20 elif test -z "$GIT"; then
  21     no_git_error='git binary not found'
  22 fi
  23
  24 is_git() {
  25     test -z "$no_git_error"
  26 }
  27
  28 update_error() {
  29     echo "$0: $*"
  30     echo
  31     echo "Unable to automatically checkout GIT submodules '$modules'."
  32     echo "If you require use of an alternative GIT binary (for example to"
  33     echo "enable use of a transparent proxy), please disable automatic"
  34     echo "GIT submodule checkout with:"
  35     echo
  36     echo " $ ./configure --disable-download"
  37     echo
  38     echo "and then manually update submodules prior to running make, with:"
  39     echo
  40     echo " $ GIT='tsocks git' scripts/git-submodule.sh update $modules"
  41     echo
  42     exit 1
  43 }
  44
  45 validate_error() {
  46     if is_git && test "$1" = "validate"; then
  47         echo "GIT submodules checkout is out of date, and submodules"
  48         echo "configured for validate only. Please run"
  49         echo "  scripts/git-submodule.sh update $maybe_modules"
  50         echo "from the source directory or call configure with"
  51         echo "  --enable-download"
  52     fi
  53     exit 1
  54 }
  55
  56 check_updated() {
  57     local CURSTATUS OLDSTATUS
  58     CURSTATUS=$($GIT submodule status $module)
  59     OLDSTATUS=$(grep $module $substat)
  60     test "$CURSTATUS" = "$OLDSTATUS"
  61 }
  62
  63 if is_git; then
  64     test -e $substat || touch $substat
  65     modules=""
  66     for m in $maybe_modules
  67     do
  68         $GIT submodule status $m 1> /dev/null 2>&1
  69         if test $? = 0
  70         then
  71             modules="$modules $m"
  72             grep $m $substat > /dev/null 2>&1 || $GIT submodule status $module >> $substat
  73         else
  74             echo "warn: ignoring non-existent submodule $m"
  75         fi
  76     done
  77 else
  78     modules=$maybe_modules
  79 fi
  80
  81 case "$command" in
  82 status|validate)
  83     for module in $modules; do
  84         if is_git; then
  85             check_updated $module || validate_error "$command"
  86         elif ! (set xyz "$module"/* && test -e "$2"); then
  87             # The directory does not exist or it contains no files
  88             echo "$0: sources not available for $module and $no_git_error"
  89             validate_error "$command"
  90         fi
  91     done
  92     ;;
  93
  94 update)
  95     is_git || {
  96         echo "$0: unexpectedly called with submodules but $no_git_error"
  97         exit 1
  98     }
  99
 100     $GIT submodule update --init $modules 1>/dev/null
 101     test $? -ne 0 && update_error "failed to update modules"
 102     for module in $modules; do
 103         check_updated $module || echo Updated "$module"
 104     done
 105
 106     (while read -r; do
 107         for module in $modules; do
 108             case $REPLY in
 109                 *" $module "*) continue 2 ;;
 110             esac
 111         done
 112         printf '%s\n' "$REPLY"
 113     done
 114     $GIT submodule status $modules
 115     test $? -ne 0 && update_error "failed to save git submodule status" >&2) < $substat > $substat.new
 116     mv -f $substat.new $substat
 117     ;;
 118 esac
 119
 120 exit 0