Rename a Phoenix application.

rename_phoenix_app.sh

#!/bin/bash

set -e
set -o pipefail

CURRENT_OTP=$1
NEW_OTP=$2
CURRENT_NAME=""
NEW_NAME=""

# New name and current name arguments are required
if [ $# -ne 2 ]; then
    echo -e "Please provide the current name and new name in snake case\n"\
      "usage: /.rename_phoenix_app.sh current_name new_name"
    exit 64
fi

# Split snake cased names into array of words.
IFS="_" read -a current_name_words <<< "$CURRENT_OTP"
IFS="_" read -a new_name_words <<< "$NEW_OTP"

# Upercase all the words and concatenate them together to derive the CamelCase
# module names
for word in "${current_name_words[@]}"; do
  word="$(tr '[:lower:]' '[:upper:]' <<< ${word:0:1})${word:1}"
  CURRENT_NAME="$CURRENT_NAME$word"
done

for word in "${new_name_words[@]}"; do
  word="$(tr '[:lower:]' '[:upper:]' <<< ${word:0:1})${word:1}"
  NEW_NAME="$NEW_NAME$word"
done

# Confirm name change
echo -e -n "Please confirm this is correct:\n"\
  "Change $CURRENT_OTP to $NEW_OTP?\n"\
  "Change $CURRENT_NAME to $NEW_NAME?\n"\
  "Continue? [y/n]"

read -p "" ANSWER

if [ "$ANSWER" = "y" ]; then
  grep -l $CURRENT_NAME -r . --exclude-dir=_build \
    | xargs sed -i '' -e "s/$CURRENT_NAME/$NEW_NAME/g"
  grep -l $CURRENT_OTP -r . --exclude-dir=_build \
    | xargs sed -i '' -e "s/$CURRENT_OTP/$NEW_OTP/g"

  mv lib/$CURRENT_OTP lib/$NEW_OTP
  mv lib/$CURRENT_OTP.ex lib/$NEW_OTP.ex
  echo -e "Completed renaming"
else 
  echo -e "exiting"
  exit 0
fi

This was originally inspired by this gist. Swapped out ack for grep, accept new application name as an argument and added confirmation prompt.