Checks that this repository and all of its submodules point to the tip of a certain BRANCH

git-check-versions.sh

#!/bin/bash
#
# Usage ./git-check-versions.sh BRANCH
#
# Checks that this repository and all of its submodules point to the tip of
# a certain BRANCH.

BRANCH=$1

check() {
    cd $2
    BRANCH_HASH=`git log --pretty=format:"%H" $BRANCH -- 2>/dev/null | head -1`
    [ "$BRANCH_HASH" = "$1" ] ||
        echo "$2 doesn't point to the tip of branch $BRANCH"
    cd - >/dev/null
}

# Check this repo
check `git log --pretty=format:"%H" | head -1` .

# Also check submodules
git submodule status --recursive | while read line ; do
    SUB_HASH=`echo $line | awk '{print $1}'`
    SUB_PATH=`echo $line | awk '{print $2}'`
    check $SUB_HASH $SUB_PATH
done