If you have a look in the tests you'll see how I override the config there,
but it is a bit naff making you with-redefs one of the library's internal
vars, and double naff that you have to wrap it in a delay.
(with-redefs [conf-er/config-map (delay {:test 42})]
(fact (config :test) => 42))
If you do that for now, I'll include a tests util in the next release which
does the same from a guaranteed stable api function
Adam
On 6 May 2013 01:46, "Russell Mull" <russell.m...@gmail.com> wrote:
> This looks simple and useful, thanks!
>
> Supposing I had a function that called this library, how could I go about
> testing it easily? That is, the configuration file becomes implicitly an
> input to the function, one that I'd like to be able to control from my
> tests. Perhaps something like this could be used to provide or override
> config settings dynamically:
>
> (with-config {:username "bogus"}
> (...))
>
> I'm not trying to open the dynamic scoping can of worms here; this library
> clearly is a choice for people already willing to work in that way.
>
>
> On Thursday, May 2, 2013 9:40:29 PM UTC+9, Adam Clements wrote:
>>
>> A very simple library for loading application level config from a
>> configuration file in a nice way, with caching and reloading functionality.
>>
>> Any other configuration libraries I found were either massively overkill
>> for my needs (full on validation schemas built in), too complicated to set
>> up and pass around or involved simply read-evaling a whole namespace which
>> could be insecure depending where you get your config.
>>
>> Simple but useful - I found myself duplicating this code in almost all my
>> projects before making it into a library! Well tested and documented,
>> there are very few moving parts so I expect this to stay stable and not
>> really change over time.
>>
>> Source:
>> https://github.com/TouchType/**conf-er<https://github.com/TouchType/conf-er>
>> Clojars: [conf-er "1.0.1"]
>>
>> The idea is to have a single configuration file which consists of a
>> keyworded map, you then look up individual properties with nested keywords,
>> for example your config file looks like this (simple EDN map):
>>
>> ;; my-config.conf
>>> {:username "joe.bloggs"
>>> :password "letmein"
>>> :database {:host "127.0.0.1"
>>> :port 1234}
>>> :my.library/number 42}
>>
>>
>> And then look up the configuration from anywhere within your program!
>> Simply include the conf-er namespace
>>
>> (use 'conf-er)
>>
>>
>>> (config :username) => "joe.bloggs"
>>> (configured? :database) => true
>>> (config :database) => {:host "127.0.0.1" :port 1234}
>>> (config :database :port) => 1234
>>
>>
>>
>> Tell your program where to find the configuration file from your
>> leiningen project.clj during development, or if you are distributing a jar
>> then add the property onto the java command line call:
>>>
>>> ...
>>> :jvm-opts ["-Dconfig=~/my-config.conf"]
>>> ...
>>
>>
>> (config :database :connections) => (Exception "Couldn't find :database
>> :connections in configuration file")
>> (opt-config :database :connections) => nil
>>
>> If you use this from within a library, you must namespace your
>> configuration in case the application using your library also wishes to use
>> conf-er. You can do this like so:
>>
>> (ns my.library
>>> (:require [conf-er :refer [config]]))
>>> (config ::number) => 42
>>
>>
>> Here :number will expand out to the namespaced keyword
>> :my.library/number, which we put in our configuration file earlier.
>>
>> Hope this is of use to some people.
>>
>> Adam
>>
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