git-remove-submodule

#!/bin/sh
#
# Kirill Klenov 
# Oct 27, 2013
#
# Usage: Add it to your PATH and `git submodule-remove path/to/submodule`.

ROOT=$(git rev-parse --show-toplevel)
SUBMODULE_NAME=$(echo "$1" | sed 's/\/$//'); shift
test -z "$SUBMODULE_NAME" && echo "You should define path to submodule." 1>&2 && exit 1

git submodule status "$SUBMODULE_NAME" >/dev/null 2>&1 || {
    echo "Submodule '$SUBMODULE_NAME' not found" 1>&2 && exit 1
}
test ! -f $ROOT/.gitmodules && echo "File .gitmodules not found" 1>&2 && exit 2

git submodule deinit -f "$SUBMODULE_NAME" && git rm -f "$SUBMODULE_NAME" && {
    SUBMODULE_PATH=$(python -c "import os.path; print os.path.relpath('$SUBMODULE_NAME','$ROOT')")
    git config -f $ROOT/.gitmodules --remove-section "submodule.$SUBMODULE_PATH"
    if [ -z "$(cat $ROOT/.gitmodules)" ]; then
        git rm -f $ROOT/.gitmodules
    else
        git add $ROOT/.gitmodules
    fi
    if [ -d "$ROOT/.git/modules/$SUBMODULE_PATH" ]; then
        echo "rm .git/modules/$SUBMODULE_PATH"
        rm -rf "$ROOT/.git/modules/$SUBMODULE_PATH"
    fi
}