Import QEMU upstream snapshot d2e570c

Upstream: https://gitlab.com/qemu-project/qemu.git

Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475

scripts/git-submodule.sh

@@ -0,0 +1,120 @@
+#!/bin/sh
+#
+# This code is licensed under the GPL version 2 or later.  See
+# the COPYING file in the top-level directory.
+
+substat=".git-submodule-status"
+
+command=$1
+shift
+maybe_modules="$@"
+
+test -z "$maybe_modules" && exit 0
+test -z "$GIT" && GIT=$(command -v git)
+
+cd "$(dirname "$0")/.."
+
+no_git_error=
+if ! test -e ".git"; then
+    no_git_error='no git checkout exists'
+elif test -z "$GIT"; then
+    no_git_error='git binary not found'
+fi
+
+is_git() {
+    test -z "$no_git_error"
+}
+
+update_error() {
+    echo "$0: $*"
+    echo
+    echo "Unable to automatically checkout GIT submodules '$modules'."
+    echo "If you require use of an alternative GIT binary (for example to"
+    echo "enable use of a transparent proxy), please disable automatic"
+    echo "GIT submodule checkout with:"
+    echo
+    echo " $ ./configure --disable-download"
+    echo
+    echo "and then manually update submodules prior to running make, with:"
+    echo
+    echo " $ GIT='tsocks git' scripts/git-submodule.sh update $modules"
+    echo
+    exit 1
+}
+
+validate_error() {
+    if is_git && test "$1" = "validate"; then
+        echo "GIT submodules checkout is out of date, and submodules"
+        echo "configured for validate only. Please run"
+        echo "  scripts/git-submodule.sh update $maybe_modules"
+        echo "from the source directory or call configure with"
+        echo "  --enable-download"
+    fi
+    exit 1
+}
+
+check_updated() {
+    local CURSTATUS OLDSTATUS
+    CURSTATUS=$($GIT submodule status $module)
+    OLDSTATUS=$(grep $module $substat)
+    test "$CURSTATUS" = "$OLDSTATUS"
+}
+
+if is_git; then
+    test -e $substat || touch $substat
+    modules=""
+    for m in $maybe_modules
+    do
+        $GIT submodule status $m 1> /dev/null 2>&1
+        if test $? = 0
+        then
+            modules="$modules $m"
+            grep $m $substat > /dev/null 2>&1 || $GIT submodule status $module >> $substat
+        else
+            echo "warn: ignoring non-existent submodule $m"
+        fi
+    done
+else
+    modules=$maybe_modules
+fi
+
+case "$command" in
+status|validate)
+    for module in $modules; do
+        if is_git; then
+            check_updated $module || validate_error "$command"
+        elif ! (set xyz "$module"/* && test -e "$2"); then
+            # The directory does not exist or it contains no files
+            echo "$0: sources not available for $module and $no_git_error"
+            validate_error "$command"
+        fi
+    done
+    ;;
+
+update)
+    is_git || {
+        echo "$0: unexpectedly called with submodules but $no_git_error"
+        exit 1
+    }
+
+    $GIT submodule update --init $modules 1>/dev/null
+    test $? -ne 0 && update_error "failed to update modules"
+    for module in $modules; do
+        check_updated $module || echo Updated "$module"
+    done
+
+    (while read -r REPLY; do
+        for module in $modules; do
+            case $REPLY in
+                *" $module "*) continue 2 ;;
+            esac
+        done
+        printf '%s\n' "$REPLY"
+    done
+    $GIT submodule status $modules
+    test $? -ne 0 && update_error "failed to save git submodule status" >&2) < $substat > $substat.new
+    mv -f $substat.new $substat
+    ;;
+esac
+
+exit 0