Bash script for .env file loading

dotenv.sh

#!/bin/bash

source logging_utils.sh

DOTENV_ENV="test"
DOTENV_BASE="./"


if [ ! -z $1 ]; then
  DOTENV_ENV="$1"
fi

if [ ! -z $2 ]; then
  DOTENV_BASE="$2"
fi

log_info "Loading dotenv files for environment \"$DOTENV_ENV\" with base path \"$DOTENV_BASE\""

function load_dotenv_file() {
  FILE="$1"

  if [ -f $FILE ]; then
    log_info "Loading dotenv file \"$FILE\""

    set -o allexport
    source $FILE
    set +o allexport
  else
    log_warn "Unable to load dotenv file \"$FILE\", file does not exist."
  fi
}

# 1. always try to load ".env"
load_dotenv_file "$DOTENV_BASE.env"

# 2. then try to load ".env.DOTENV_ENV"
load_dotenv_file "$DOTENV_BASE.env.$DOTENV_ENV"

# 3. finally try to load ".env.local"
load_dotenv_file "$DOTENV_BASE.env.local"

Usage

my_script.sh

#!/bin/bash

source ./dotenv.sh production

Now script will try to load following .env files, each file can override variables defined in previously loaded file.

1. .env
2. .env.production
3. .env.local