jd-getenv

usage

//With env 
// NODE_ENV : "production"
// MY_ENV_VAR : "hello"
// MY_INT_ENV_VAR : "123"
// MY_JSON_ENV_VAR : "{\"aproperty\" : 12345}"
// MY_NEGATIVEINT_ENV_VAR : "-1"

const EnvGet = require('jd-getenv`);
let t;
t = EnvGet.string("NODE_ENV");
// returns 'production'
t = EnvGet.string("MY_ENV_VAR", "My Default Value if not found");
// returns 'hello'
t = EnvGet.string("MY_ENV_VAR2", "DefaultValue");
// returns 'DefaultValue'
t = EnvGet.int("MY_INT_ENV_VAR", 10);
// returns '123'
t = EnvGet.positiveInt("MY_INT_ENV_VAR", 10);
// returns '123'
t = EnvGet.json("MY_JSON_ENV_VAR", {some : "jsonObject"} );
// returns {aproperty : 12345}

// Following will return exception : 
t = EnvGet.int("NODE_ENV"); // "production"  not int
t = EnvGet.json("NODE_ENV");  // "production"  not json
t = EnvGet.json("MY_INT_ENV_VAR");
t = EnvGet.json("MY_NEGATIVEINT_ENV_VAR");

EnvGet.{type}( env_var_name, default_value) :

• {type} : one of {int/positiveInt/json/string}, to check type of the env var
• env_var_name : name of the environment variable to be get/checked
• default_value : Value to be used if environment variable not set.
• returns the parsed value according to {type}, or, if not found the default_value if passed.

Throw an error if

• env_var_name not found and no default_value
• env_var_name found but not compatible

Remark :

• No check of type validity of the default_value
• json type expects a valid object , ie string starting with { or [