envdef provides methods of setting environment value with default value.
As a library
go get github.com/locona/envdef
or if you want to use it as a bin command
go get github.com/locona/envdef/cmd/envdef
Add your application configuration to your .env file in the root of your project:
S3_BUCKET=YOURS3BUCKET
SECRET_KEY=YOURSECRETKEYGOESHERE
and .env.sample file in the root of your project:
S3_BUCKET=YOURS3BUCKET
SECRET_KEY=YOURSECRETKEYGOESHERE
REGION=REGION
And then run:
envdef
As a result created the .env.new file
REGION=REGION
S3_BUCKET=YOURS3BUCKET
SECRET_KEY=YOURSECRETKEYGOESHERE
testtest