#!/bin/bash

# fetch master branch
git fetch origin master

# unshallow if needed
echo "Finding merge base"
if ! git merge-base origin/master HEAD; then
  echo "Could not find merge base, unshallowing repo"
  git fetch --unshallow
fi

# Check formatting using format.sh
echo "Checking your code using format.sh..."

diff="$(./format.sh --diff --cmake --shell --print-version --branch origin/master)"
err=$?

sep="
----------
"
used_version="${diff%%"$sep"*}"
diff="${diff#*"$sep"}"
changes_to_make="${diff%%"$sep"*}"
files_to_edit="${diff#*"$sep"}"

case $err in
  1)
    cat <<EOM

***********************************************************
***                                                     ***
***   Your code does not comply with our style guide.   ***
***                                                     ***
***   Please correct it or run the "format.sh" script.  ***
***  Then commit and push those changes to this branch. ***
***   Check our CONTRIBUTING.md file for more details.  ***
***                                                     ***
***                    Thank you ❤️                      ***
***                                                     ***
***********************************************************

Used version:
$used_version

Affected files:
$files_to_edit

The following changes should be made:
$changes_to_make

Exiting...
EOM
    exit 2
    ;;

  0)
    cat <<EOM

***********************************************************
***                                                     ***
***       Your code complies with our style guide!      ***
***                                                     ***
***                      Awesome 👍                     ***
***                                                     ***
***********************************************************

Used version:
$used_version

Exiting...
EOM
    exit 0
    ;;

  *)
    echo "Something went wrong in our formatting checks: format.sh returned $err" >&2
    ;;
esac