superbuild/modules/SDL2/build-scripts/showrev.sh

#!/bin/sh
#
# Print the current source revision, if available

SDL_ROOT=$(dirname $0)/..
cd $SDL_ROOT

if [ -x "$(command -v git)" ]; then
    rev=$(echo "$(git remote get-url origin 2>/dev/null)@$(git rev-list HEAD~.. 2>/dev/null)")
    if [ "$rev" != "@" ]; then
        echo $rev
        exit 0
    fi
fi

if [ -x "$(command -v p4)" ]; then
    rev="$(p4 changes -m1 ./...\#have 2>/dev/null| awk '{print $2}')"
    if [ $? = 0 ]; then
        echo $rev
        exit 0
    fi
fi

echo ""
exit 1