Mango

Git, completely decentralised.

Using Ethereum and P2P content addressable networks (Swarm, IPFS, SSB) as a backend to Git.

This repository is also available on Mango at mango://{...}

NOTE: the protocol is subject to change. With subsequent changes your past repositories can became unaccessible.

Get started

Prerequisites:

• an Ethereum node
• an IPFS node
• git and node.js environment

Install the helpers with: $ npm install -g mango-admin git-remote-mango

First you will need to create a repository on Ethereum. You can do this with: $ mango-admin create. This will use a simple contract with access control.

If you have a repository you want to upload:

1. Add the new remote: $ git remote add mango mango://{repo address}

2. Push to the new remote: $ git push mango master

If you know a repository you want to download: $ git clone mango://{repo address}

The repo address is the address of the repo contract - basically it is an Ethereum address. In the future, it could be a symbolic name retrieved via name systems, such as ENS.

You can use MangoRepo.sol as a repository contract. It is very basic and allows only the owner to publish Git updates.

If you have more than one Ethereum account in your local node, the desired address can be specified in the URL: mango://{ethereum account}@{repo address}

Use in test mode

The easiest way to try out Mango is using on a test network.

I suggest to try out testrpc, which is an Ethereum node simulator.

Additionally the data to IPFS will not be uploaded if an IPFS daemon is not installed and/or is not in synchronisation mode. Data will be stored and accessible locally only.

Example

Adding an existing repository:

$ git remote add mango mango://0x8add9d064bbd29f3118f11ee46abe0ad9e45aa59
$ git push mango master
Counting objects: 17, done.
Delta compression using up to 4 threads.
Compressing objects: 100% (17/17), done.
Writing objects: 100% (17/17), 5.21 KiB | 0 bytes/s, done.
Total 17 (delta 7), reused 0 (delta 0)
To mango://0x8add9d064bbd29f3118f11ee46abe0ad9e45aa59
 * [new branch]      master -> master
$

Cloning:

$ git clone mango://0x8add9d064bbd29f3118f11ee46abe0ad9e45aa59
Cloning into '0x8add9d064bbd29f3118f11ee46abe0ad9e45aa59'...
12% =====================------------------------------------------------------------------------------------------------------------------------------------------------------------
18% ===============================--------------------------------------------------------------------------------------------------------------------------------------------------
24% ==========================================---------------------------------------------------------------------------------------------------------------------------------------
29% ====================================================-----------------------------------------------------------------------------------------------------------------------------
35% ==============================================================-------------------------------------------------------------------------------------------------------------------
41% =========================================================================--------------------------------------------------------------------------------------------------------
47% ===================================================================================----------------------------------------------------------------------------------------------
53% ==============================================================================================-----------------------------------------------------------------------------------
59% ========================================================================================================-------------------------------------------------------------------------
71% =============================================================================================================================----------------------------------------------------
76% =======================================================================================================================================------------------------------------------
88% ============================================================================================================================================================---------------------
94% =======================================================================================================================================================================----------
Receiving objects: 100% (17/17), 10.59 KiB | 0 bytes/s, done.
Checking connectivity... done.
$

Technical details

For the technical details see TECH.md.

Why is it called Mango?

I like using codenames when writing even proof of concepts. In any case it sounded nicer than ethergit.

The Ethereum ecosystem has a couple of white papers, two of them are:

• the Yellow paper (EVM)
• and the Orange paper (Swarm)

Considering that a mango can be yellow, orange, red or green based on its level of ripeness it fits in well :)

License

GPL v3

Copyright (C) 2016 Alex Beregszaszi