Revamp switch_all_submodules_to_head_and_clean

+ script revised according to update_all_submodules
+ files .gitmodules are processed instead of call git submodule foreach
+ modules are initialized during processing instead of at the beginning
+ initialize submodules only if they have not yet been initialized
+ use --no-recurse-submodules at git pull for better overview of the update progress

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

switch_all_submodules_to_head_and_clean

@@ -1,26 +1,37 @@
 #!/bin/bash
 
-if [[ ! -e .git ]] ||
+# echo in bold
+echobd () {
+    if [ -p /dev/stdout ]; then
+        echo "$1"
+    else
+        echo -ne "\033[1m"
+        echo -n "$1"
+        echo -e "\033[0m"
+    fi
+}
+
+# verify git directory and branch
+if [[ ! -e .git ]] &&
    [[ -z "`git rev-parse --git-dir 2>/dev/null`" ]]; then
-	echo "This script can only be run from a top level git directory.  Exiting..."
+	echo "Current directory does not contain a .git folder.  Exiting..."
 	exit 1
 fi
 
 branch=`git symbolic-ref -q HEAD | sed "s|^refs/heads/||"`
+if [[ -z "$branch" ]]; then
+    branch=`git branch --contains HEAD | egrep -v "no branch|detached" | head -n1 | cut -c 3-`
+fi
 if [[ -z "$branch" ]] ||
    [[ -z "`git rev-parse --symbolic-full-name --remotes=\"*/$branch\"`" ]]; then
 	echo "There is not active upstream branch.  Exiting..."
 	exit 1
 fi
 
-# check git abilities
-if [[ -n "`git status --help 2>/dev/null|grep -- '--ignore-submodules'`" ]]; then
-  GIT_IGNORE_SUBMODULES="--ignore-submodules"
-fi
-
-echo "Preparing $PWD for development use"
+# get git user
+echobd "Preparing $(git rev-parse --show-toplevel | xargs -r basename) $branch branch for development use"
 if [[ $1 == "" ]]; then
-	gituser=`sed -n "/^\[remote \"origin\"\]/,/url/s/\turl = http:\/\/\([^@]*\)@.*/\1/p" <\`git rev-parse --git-dir\`/config | grep -v "\(anonymous\|system\)"`
+	gituser=`git config --local remote.origin.url | sed -n "s/https\?:\/\/\([^@]*\)@.*/\1/p" | grep -v "\(anonymous\|system\)"`
 else
 	gituser=$1
 fi
@@ -33,28 +44,40 @@ if [[ $gituser == "" ]]; then
 	gituser="anonymous"
 fi
 
-THISSCRIPT=$(readlink -f $0)
-
-if [[ ! -e "$THISSCRIPT" ]]; then
-	echo "Unable to find myself!  Exiting..."
-	exit 1
+# check git abilities
+if [[ -n "`git status --help 2>/dev/null|grep -- '--ignore-submodules'`" ]]; then
+  GIT_IGNORE_SUBMODULES="--ignore-submodules"
 fi
+if [[ -n "`git pull --help |grep -- '--\[no-\]recurse-submodules'`" ]]; then
+  GIT_NO_RECURSE_SUBMODULES="--no-recurse-submodules"
+fi
+
+# update module and submodules
+updateModule() {
+    local MODULE
+    if [[ "$1" != "" ]]; then
+        MODULE=$1/
+    else
+        MODULE=""
+    fi
 
-if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
+    cd $PARENTDIR/$MODULE
+    if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
         git reset --hard HEAD
         git clean -dxff
-fi
-git pull --rebase
-if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
+    fi
+    git checkout $branch
+    git pull --rebase $GIT_NO_RECURSE_SUBMODULES
+    if [[ ! -z "`git status --porcelain $GIT_IGNORE_SUBMODULES`" ]]; then
         git reset --hard HEAD
         git clean -dxff
-fi
+    fi
 
-if [[ -e .gitmodules ]]; then
+    if [[ -e $PARENTDIR/$MODULE.gitmodules ]]; then
         if [[ $gituser == "anonymous" ]]; then
-		sed -i 's/system@//g' .gitmodules
+            sed -i 's/system@//g' $PARENTDIR/$MODULE.gitmodules
         else
-		sed -i "s/system@/$gituser@/g" .gitmodules
+            sed -i "s/system@/$gituser@/g" $PARENTDIR/$MODULE.gitmodules
         fi
         REPO_URL=$(git config --get remote.origin.url |\
                    sed "s|\(https\?\)://\([^@]*@\)\?\(.*\)/[^/]*$|\3|")
@@ -62,12 +85,27 @@ if [[ -e .gitmodules ]]; then
                      sed "s|\(https\?\)://\([^@]*@\)\?\(.*\)/[^/]*$|\1|")
         REPO_MASTER=scm.trinitydesktop.org/scm/git
         if [[ "$REPO_URL" != "$REPO_MASTER" ]]; then
-		sed -i "s#https\?://\([^@]*@\)\?$REPO_MASTER#$REPO_PROTO://\1$REPO_URL#g" .gitmodules
+            sed -i "s#https\?://\([^@]*@\)\?$REPO_MASTER#$REPO_PROTO://\1$REPO_URL#g" $PARENTDIR/$MODULE.gitmodules
         fi
+        sed -n "s|^\[submodule \"\([^\"]*\)\"\]$|\1|p" <$PARENTDIR/$MODULE.gitmodules |\
+        while read submodule; do
+            echobd "Attempting to switch submodule ${MODULE}${submodule}"
+            cd $PARENTDIR/$MODULE
+            if [[ -z "`git config --get submodule.$submodule.url`" ]]; then
+                git submodule init -- $submodule
+            fi
+            if [[ ! -e "$submodule/.git" ]]; then
+                git submodule update -- $submodule
+            fi
+            updateModule ${MODULE}${submodule}
+        done
+        git checkout -- $PARENTDIR/$MODULE.gitmodules
+    fi
+}
 
-	git submodule init
-	git submodule update
-	git submodule foreach "git checkout $branch && $THISSCRIPT $gituser"
-
-	git checkout -- .gitmodules
-fi
+# Update from top module
+cd `git rev-parse --show-toplevel`
+PARENTDIR=$PWD
+echobd "Working in $PARENTDIR"
+updateModule
+echobd "Done in $PARENTDIR"