Revamp update_all_submodules

+ submodules file is no longer needed
+ list of submodules is loaded from .gitmodules
+ order of the submodules is determined by .gitmodules
+ nested submodules are processed recursively by .gitmodules
+ all submodules, including nested, are updated in one cycle

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit 9f54f58809)

update_all_submodules

@@ -6,7 +6,7 @@ if [[ -e /var/lock/update-tde-git-submodules ]]; then
         exit 0
 fi
 
-if [[ ! -e .git ]] ||
+if [[ ! -e .git ]] &&
    [[ -z "`git rev-parse --git-dir 2>/dev/null`" ]]; then
 	echo "Current directory does not contain a .git folder.  Exiting..."
 	exit 1
@@ -19,57 +19,91 @@ if [[ -z "$branch" ]] ||
 	exit 1
 fi
 
+GITUSER="Automated System <$(git config --get user.email)>"
+
 # check git abilities
 if [[ -n "`git status --help 2>/dev/null|grep -- '--ignore-submodules'`" ]]; then
   GIT_IGNORE_SUBMODULES="--ignore-submodules"
 fi
 
-touch /var/lock/update-tde-git-submodules
+# echo in bold
+echobd () {
+    if [ -p /dev/stdout ]; then
+        echo "$1"
+    else
+        echo -ne "\033[1m"
+        echo -n "$1"
+        echo -e "\033[0m"
+    fi
+}
 
-PARENTDIR=$PWD
-echo "Working in $PARENTDIR"
-git pull
-if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
-	git reset --hard HEAD
-	git clean -dxff
-fi
+# commmit changed module
+commitModule() {
+    if [[ "$1" == "" ]]; then
+        return
+    fi
+    local MODULE=$1
 
-exec 3< submodules
-while read <&3
-do
-	cd $PARENTDIR
-	DIR2UPDATE=$REPLY
-	if [[ $DIR2UPDATE != "" ]]; then
-		echo "Attempting to reset submodule $DIR2UPDATE"
-		cd $PARENTDIR/$DIR2UPDATE/..
-		cd `git rev-parse --show-toplevel`
-		if [[ -z "`grep \"^Updated: $PWD$\" /var/lock/update-tde-git-submodules`" ]]; then
-			echo "Updated: $PWD" >>/var/lock/update-tde-git-submodules
-			git submodule init
-			git submodule update
-		fi
-		cd $PARENTDIR/$DIR2UPDATE
-		if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
-			git reset --hard HEAD
-			git clean -dxff
-		fi
-		git checkout $branch
-		git pull
-		cd ..
-		cd `git rev-parse --show-toplevel`
-		echo "Committing changes to $PWD"
-		if [[ ! -z "`git status --porcelain $PARENTDIR/$DIR2UPDATE`" ]]; then
-			git add $PARENTDIR/$DIR2UPDATE
-			git commit $PARENTDIR/$DIR2UPDATE -m "Reset submodule $DIR2UPDATE to latest HEAD"
-		fi
-		if [[ "`git rev-parse HEAD`" != "`git rev-parse origin/$branch`" ]]; then
-			git push origin HEAD
-		fi
-	fi
-done
-exec 3>&-
+    cd $PARENTDIR/$MODULE/..
+    cd `git rev-parse --show-toplevel`
+    if [[ ! -z "`git status --porcelain $PARENTDIR/$MODULE`" ]]; then
+        echo "Committing changes to $PWD"
+        git add $PARENTDIR/$MODULE
+        git commit $PARENTDIR/$MODULE --author "$GITUSER" -m "Reset submodule $MODULE to latest HEAD"
+    fi
+    if [[ "`git rev-parse HEAD`" != "`git rev-parse origin/$branch`" ]]; then
+        echo "Push changes for $PWD"
+        git pull --rebase
+        git push origin HEAD
+    fi
+}
 
-# Let the disk subsystem recover
-sleep 60
+# update module and submodules
+updateModule() {
+    local MODULE
+    if [[ "$1" != "" ]]; then
+        MODULE=$1/
+    else
+        MODULE=""
+    fi
 
+    cd $PARENTDIR/$MODULE
+    if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
+        git reset --hard HEAD
+        git clean -dxff
+    fi
+    if [[ "$1" != "" ]]; then
+        git checkout $branch
+    fi
+    git pull --rebase
+    if [[ "`git rev-parse HEAD`" != "`git rev-parse origin/$branch`" ]]; then
+        echo "Push changes for $PWD"
+        git push origin HEAD
+    fi
+    if [[ "$1" != "" ]]; then
+        commitModule $1
+    fi
+
+    if [[ -e $PARENTDIR/$MODULE.gitmodules ]]; then
+        sed -n "s|^\[submodule \"\([^\"]*\)\"\]$|\1|p" <$PARENTDIR/$MODULE.gitmodules |\
+        while read submodule; do
+            echobd "Attempting to reset submodule ${MODULE}${submodule}"
+            cd $PARENTDIR/$MODULE
+            git submodule init -- $submodule
+            git submodule update -- $submodule
+            updateModule ${MODULE}${submodule}
+        done
+        if [[ "$1" != "" ]]; then
+            commitModule $1
+        fi
+    fi
+}
+
+# Update from top module
+touch /var/lock/update-tde-git-submodules
+cd `git rev-parse --show-toplevel`
+PARENTDIR=$PWD
+echobd "Working in $PARENTDIR"
+updateModule
+echobd "Done in $PARENTDIR"
 rm /var/lock/update-tde-git-submodules