• Stars
    star
    51
  • Rank 568,706 (Top 12 %)
  • Language
    Erlang
  • License
    Other
  • Created over 11 years ago
  • Updated almost 6 years ago

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Repository Details

Cache environment variables as Erlang app variables

Stillir

A library to cache Environmental variables for your Erlang application, useful when you pass configuration details to your application using the environment.

Reason: http://www.12factor.net/config

Build Status

The name

Stillir is icelandic for "the one who configures", it can also be used as a verb:

Hann stillir kaffikönnuna

Translates to

He configures the coffee machine.

Tests

$ rebar compile ct

Erlang API

Types

-type app_name() :: atom().
-type app_key() :: atom().
-type env_key() :: string().
-type env_var_value() :: string().
-type app_key_value() :: any().
-type default_value() :: app_key_value().
-type transform_fun() :: fun(((env_var_value())) -> app_key_value()).
-type default_fun() :: fun(() -> default_value()).
-type transform() :: integer|float|binary|atom|boolean|transform_fun().
-type opt() :: {default, any()|default_fun()}|{transform, transform()}|required.
-type opts() :: [opt()]|[].
-type config_spec() :: {app_key(), env_key()}|
                       {app_key(), env_key(), opts()}.
-type config_specs() :: [config_spec()].

boolean transform converts the following strings to booleans

true: true, yes, 1 false: false, no, 0

and throws an error otherwise

Functions

-spec set_config(app_name(), config_specs()|[]) -> ok|no_return().
-spec set_config(app_name(), app_key(), env_key()) -> ok|no_return().
-spec get_config(app_name(), app_key()) -> app_key_value()|no_return().
-spec get_config(app_name(), app_key(), default_value()) -> app_key_value().
-spec update_env(app_name(), file:filename_all(), config_specs()|[]) -> ok|no_return().

The transform_fun/0 is only run if the input is a list.

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