not_docschange.sh

#!/usr/bin/env bash

set -eo pipefail

SRC_PATH=src/robotic-lawnmower/
# latest common ancestor commit with master
#LATEST_MASTER_COMMIT=$(git -C $SRC_PATH rev-parse origin/master)
LATEST_MASTER_COMMIT=$(git -C $SRC_PATH merge-base origin/master HEAD)

PR_COMMITS=()
BACK=0
COMMIT=$(git -C $SRC_PATH rev-parse HEAD~$BACK)
while [ "$COMMIT" != "$LATEST_MASTER_COMMIT" ] ;do
  PR_COMMITS+=( $COMMIT )
  BACK=$(($BACK + 1))
  COMMIT=$(git -C $SRC_PATH rev-parse HEAD~$BACK)
done

echo "Commits in this Branch:"
for i in ${PR_COMMITS[@]}; do echo $i; done

function arr_remove() {
  to_remove="${1}"
  shift
  array=("${@}")
  new_arr=()
  for element in "${array[@]}"; do
    if [ "$element" != "$to_remove" ]; then
      echo $element
    fi
  done
}

function arr_contains(){
  to_check="${1}"
  shift
  array=("${@}")
  contains="false"
  for element in "${array[@]}"; do
    if [ "$element" == "$to_check" ]; then
      contains="true"
    fi
  done
  echo $contains
}

REBUILD_FILES=$(ls -a $SRC_PATH)
IGNORE=(".git" "docs" "." ".." "README.md")
for i in "${IGNORE[@]}"; do
  REBUILD_FILES=$(arr_remove $i $REBUILD_FILES)
done

REBUILD="false"
for entry in ${REBUILD_FILES[@]}; do
  COMMIT_NUM=$(git -C $SRC_PATH log -1 --format=format:%H --full-diff $entry)
  if [ "$(arr_contains $COMMIT_NUM $PR_COMMITS)" == "true" ]; then
    echo "Change to $entry detected"
    REBUILD="true"
  fi
done

if [ "$REBUILD" == "true" ]; then
  eval "$@"
else
  echo "All changes were to docs. I am not running the command."
fi