migration/postcopy: break the loop when there is no more page to discard

[mirror_qemu.git] / scripts / git-submodule.sh

diff --git a/scripts/git-submodule.sh b/scripts/git-submodule.sh
index 63ace6fc558ce7a451dc833293dfc814db36127d..98ca0f2737abdb8aa10d3c4d14e169877c16babd 100755 (executable)
--- a/scripts/git-submodule.sh
+++ b/scripts/git-submodule.sh
@@ -7,7 +7,7 @@ substat=".git-submodule-status"
 
 command=$1
 shift
-modules="$@"
+maybe_modules="$@"
 
 test -z "$GIT" && GIT=git
 
@@ -24,22 +24,28 @@ error() {
     echo "Alternatively you may disable automatic GIT submodule checkout"
     echo "with:"
     echo
-    echo " $ ./configure --disable-git-update'"
+    echo " $ ./configure --disable-git-update"
     echo
     echo "and then manually update submodules prior to running make, with:"
     echo
-    echo " $ scripts/git-sbumodule.sh update $modules"
+    echo " $ scripts/git-submodule.sh update $modules"
     echo
     exit 1
 }
 
-if test -z "$modules"
-then
-    test -e $substat || touch $substat
-    exit 0
-fi
+modules=""
+for m in $maybe_modules
+do
+    $GIT submodule status $m 1> /dev/null 2>&1
+    if test $? = 0
+    then
+        modules="$modules $m"
+    else
+        echo "warn: ignoring non-existent submodule $m"
+    fi
+done
 
-if ! test -e ".git"
+if test -n "$maybe_modules" && ! test -e ".git"
 then
     echo "$0: unexpectedly called with submodules but no git checkout exists"
     exit 1
@@ -47,13 +53,24 @@ fi
 
 case "$command" in
 status)
+    if test -z "$maybe_modules"
+    then
+         test -s ${substat} && exit 1 || exit 0
+    fi
+
     test -f "$substat" || exit 1
-    CURSTATUS=`$GIT submodule status $modules`
-    OLDSTATUS=`cat $substat`
+    CURSTATUS=$($GIT submodule status $modules)
+    OLDSTATUS=$(cat $substat)
     test "$CURSTATUS" = "$OLDSTATUS"
     exit $?
     ;;
 update)
+    if test -z "$maybe_modules"
+    then
+        test -e $substat || touch $substat
+        exit 0
+    fi
+
     $GIT submodule update --init $modules 1>/dev/null
     test $? -ne 0 && error "failed to update modules"