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From Franck Eyraud <>
Subject Re: Writing a Plugin : know couchdb core
Date Mon, 16 Dec 2013 13:11:51 GMT
Hi Alexander and Jan,

Thank you both of us for your answers.

I understand that the best way to learn is to dig into the code, I will 
use this
You gave me some good resources to complete the knowledge. Especially 
the erlang one; in fact, I'm not so afraid by how the erlang code is 
presented, but I might end up to use it in a too basic way and not use 
its whole power, so having an erlang doc will be also very useful.

Good idea also to look at another auth plugin, and I suppose that if you 
mentioned the XO_Auth to me, it means that it is well built (would be a 
pity to copy a bad project !)

Yes, I'll keep the list posted about how it goes, most probably after 
the Holidays.

As I mentioned in one of my first emails, if you already have some 
drafts for the planned developer guide, I might help to enhance it once 
I learned some more stuff !



On 14/12/2013 10:41, Alexander Shorin wrote:
> Hey Franck!
> On Sat, Dec 14, 2013 at 1:02 PM, Franck Eyraud
> <> wrote:
>> It seems that plugin discussions don't create passionate debates... It's a
>> pity because it is really a good feature, and since from what I understood
>> taht the couchdb core might be reduced in the future, plugins will be always
>> used more.
> There is nothing to discuss - it's very useful plugin and great idea
> to implement! Don't think that nobody cares because there was no
> responses from devs: most of them on CouchHack now and focused on
> code, fork merges and CouchDB (:
>> Maybe creating a plugin is not a in itself problem. I watched the
>> interesting talk[1] from Jason Smith which is a very good start. And it made
>> me realize that writing a plugin is in fact equivalent to writing a bit of
>> code in couchdb core.
>> So what I need is to learn what a couchdb developer knows : couchdb
>> architecture and API.
>> Is there any resource online where I can learn this stuff ? A quick start
>> guide to develop in couchdb (especially for people who never used erlang
>> before) ? Or is the only way to dig inside couchdb git tree and try to
>> understand ? Before doing this, I want to be sure I won't loose too much
>> time. So please people who entered the couchdb project later, how did you
>> reach your level ?
> Actually, there are plans to have such in our docs for developers
> guide section, but currently there is no any "official" information
> about. But we're working on to fix this (: However, you may found some
> useful blog posts over Internet and projects that are already hacked
> into CouchDB. For instance, you would love to see similar project that
> implements custom authentication with 3d party service:
> About how to start...locate interesting module, take a look on his
> commit history, find out interesting functions, write some tests about
> to check and ensure in his behaviour or read existed ones. After that,
> create your own test case - it will be all "red", but thats ok. Trying
> to make it "green" will be your goal during developing or hacking.
> Don't make it too detailed from start, but you'll be happy to extend
> and improve it while adding new functions and featured. Not the best
> plan, but something to start from (; But anyway, don't fear erlang,
> don't fear write stuff and see it broken: in most cases it's easy to
> fix things quickly after 5 minutes googling or reading erlang docs or
> lyse[1].
> Happy hacking!
> [1]:
> --
> ,,,^..^,,,

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