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Tree and files
==============
To organize folders, git uses trees. In gitlib, those trees are
represented via *Tree* object.
To get the root tree associated to a commit, use the *getTree* method on
the commit object:
```php
$tree = $commit->getTree();
```
This tree is the entry point of all of your files.
The main method for a tree is the *getEntries* method. This method will
return an array, indexed by name. Each of those elements will be the
entry mode and the entry object.
Let's understand how it works with a concrete example:
```php
function displayTree(Tree $tree, $indent = 0)
{
$indent = str_repeat(' ', $indent);
foreach ($tree->getEntries() as $name => $data) {
list($mode, $entry) = $data;
if ($entry instanceof Tree) {
echo $indent.$name.'/'.PHP_EOL;
displayTree($tree, $indent + 1);
} else {
echo $indent.$name.PHP_EOL;
}
}
}
displayTree($commit->getTree());
```
This method will recursively display all entries of a tree.
Resolve a path
--------------
To access directly a sub-file, the easier is probably to use the
*resolvePath* method.
An example:
```php
$source = $tree->resolvePath('src/Gitonomy/Git');
$source instanceof Tree;
```