Repository parser

Git/Subversion/Mercurial repository metadata parser

![Build Status]

Example

``javascript
var vizion = require('vizion');

/**
* Grab metadata for svn/git/hg repositories
*/
vizion.analyze({
folder : '/tmp/folder'
}, function(err, meta) {
if (err) throw new Error(err);

/**
*
* meta = {
* type : 'git',
* ahead : false,
* unstaged : false,
* branch : 'development',
* remotes : [ 'http', 'http ssl', 'origin' ],
* remote : 'origin',
* commment : 'This is a comment',
* update_time : Tue Oct 28 2014 14:33:30 GMT+0100 (CET),
* url : 'https://github.com/keymetrics/vizion.git',
* revision : 'f0a1d45936cf7a3c969e4caba96546fd23255796',
* next_rev : null, // null if its latest in the branch
* prev_rev : '6d6932dac9c82f8a29ff40c1d5300569c24aa2c8'
* }
*
*/
});

/**
* Check if a local repository is up to date with its remote
*/
vizion.isUpToDate({
folder : '/tmp/folder'
}, function(err, meta) {
if (err) throw new Error(err);

/**
*
* meta = {
* is_up_to_date : false,
* new_revision : '6d6932dac9c82f8a29ff40c1d5300569c24aa2c8'
* current_revision : 'f0a1d45936cf7a3c969e4caba96546fd23255796'
* }
*
*/
});

/**
* Update the local repository to latest commit found on the remote for its current branch
* - on fail it rollbacks to the latest commit
*/
vizion.update({
folder : '/tmp/folder'
}, function(err, meta) {
if (err) throw new Error(err);

/**
*
* meta = {
* success : true,
* current_revision : '6d6932dac9c82f8a29ff40c1d5300569c24aa2c8'
* }
*
*/
});

/**
* Revert to a specified commit
* - Eg: this does a git reset --hard
*/
vizion.revertTo({
revision : 'f0a1d45936cf7a3c969e4caba96546fd23255796',
folder : '/tmp/folder'
}, function(err, data) {
if (err) throw new Error(err);

/**
*
* data = {
* success : true,
* }
*
*/
});

/**
* If a previous commit exists it checkouts on it
*/
vizion.prev({
folder : '/tmp/folder'
}, function(err, meta) {
if (err) throw new Error(err);

/**
*
* meta = {
* success : true,
* current_revision : '6d6932dac9c82f8a29ff40c1d5300569c24aa2c8'
* }
*
*/
});

/**
* If a more recent commit exists it checkouts on it
*/
vizion.next({
folder : '/tmp/folder'
}, function(err, meta) {
if (err) throw new Error(err);

/**
*
* meta = {
* success : false,
* current_revision : '6d6932dac9c82f8a29ff40c1d5300569c24aa2c8'
* }
*
*/
});
``