Recursively update all git submodules in a direcory

update-git-submodules.sh

#!/bin/bash

# Updates Git submodules to latest commit

# use:
# $bash update-submodules.sh WORKING_DIRECTORY SUBMODULE_DIRECTORY SHOULD_UPDATE_GIT
# sample use:
# $ bash update-submodules.sh ~/code/my-repo my-submodule true

update_submodule () {

  # cd into parent directory of our submodule directory
  cd "$1/../"
  echo "***** Updating repository at $PWD *****"

  # make sure that the parent directory actually has a submodule:
  if test -f ".gitmodules"; then
    
    # update the submodule
    echo "***** Udating submodule $2 *****"
    git submodule update --recursive --remote

    # only update VCS if 3rd param exists
    if [ "$3" ]; then

        # add, commit and push changes
        echo "***** Adding, committing, pushing *****"
        git add $2
        git commit -m "chore: updates submodule to latest commit"
        git push
    fi
  fi
}

# save original directory
prev_dir="$PWD"

find $1 -type d -name "$2" -maxdepth 3 | while read file; do update_submodule "$file" "$2" "$3"; done

# revert to original directory
cd $prev_dir