From bbe2e0e5ea51ae8802d6bb1b10f39ac88b484ae6 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phan=20Kochen?= <stephan@kochen.nl>
Date: Mon, 21 Jan 2019 13:36:25 +0100
Subject: [PATCH 1/4] Ensure `Package::$resolves` is set.

---
 src/Package.php | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/src/Package.php b/src/Package.php
index dd28001..6cc1062 100644
--- a/src/Package.php
+++ b/src/Package.php
@@ -59,7 +59,7 @@ class Package
      *
      * @var Package[]
      */
-    protected $resolves;
+    protected $resolves = [];
 
     /**
      * Depth in the dependency tree. Only initialized once the YarnLock computes
@@ -208,9 +208,6 @@ public function getResolves()
      */
     public function addResolves(Package $package)
     {
-        if ($this->resolves === null) {
-            $this->resolves = [];
-        }
         if (in_array($package, $this->resolves)) {
             return;
         }

From aa463f01aba06f9c3cf68bdf9f0d7ba3e7623e0d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phan=20Kochen?= <stephan@kochen.nl>
Date: Mon, 21 Jan 2019 13:36:58 +0100
Subject: [PATCH 2/4] Ensure depth is calculated when using
 `getPackagesByDepth()`.

---
 src/YarnLock.php | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/YarnLock.php b/src/YarnLock.php
index 25ca7e5..4b8c060 100644
--- a/src/YarnLock.php
+++ b/src/YarnLock.php
@@ -133,6 +133,7 @@ public function getPackagesByName($packageName)
      */
     public function getPackagesByDepth($start, $end = 0)
     {
+        $this->calculateDepth();
         if ($end === 0 || ($end !== null && $end < $start)) {
             $end = $start + 1;
         }

From 5558b05c0081c506deeea6483b87e895f388e09a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phan=20Kochen?= <stephan@kochen.nl>
Date: Mon, 21 Jan 2019 13:44:20 +0100
Subject: [PATCH 3/4] Fix the namespace in the readme.

---
 readme.md | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/readme.md b/readme.md
index 74e9874..df40c23 100644
--- a/readme.md
+++ b/readme.md
@@ -6,9 +6,10 @@
 A php-package for parsing and evaluating the [yarn.lock](https://yarnpkg.com/lang/en/docs/yarn-lock/) format.
 
 ## Basic Usage
+
 ```php
 <?php
-use Mindscreen\YarnLock;
+use Mindscreen\YarnLock\YarnLock;
 
 $yarnLock = YarnLock::fromString(file_get_contents('yarn.lock'));
 
@@ -19,10 +20,13 @@ $babelCoreDependencies = $babelCorePackages[0]->getDependencies();
 ```
 
 ## Package Depth
+
 If you maybe don't just want all packages but only the direct dependencies plus one level of indirection, you have to go a little extra mile:
+
 ```php
 <?php
-use Mindscreen\YarnLock;
+use Mindscreen\YarnLock\YarnLock;
+
 // read the dependencies from the package.json file
 $packageDependencies = (json_decode(file_get_contents('package.json')))->dependencies;
 // get these packages from the yarn lock-file
@@ -35,4 +39,4 @@ $yarnLock->calculateDepth($rootDependencies);
 
 // get the first two levels; the second argument is the exclusive upper limit
 $yarnLock->getPackagesByDepth(0, 2);
-```
\ No newline at end of file
+```

From 3c77397dd51012ea12d397130c76eecbbfb8b578 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?St=C3=A9phan=20Kochen?= <stephan@kochen.nl>
Date: Mon, 21 Jan 2019 13:46:31 +0100
Subject: [PATCH 4/4] Fix the depth query example in the readme.

---
 readme.md | 21 +++++----------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/readme.md b/readme.md
index df40c23..6572e90 100644
--- a/readme.md
+++ b/readme.md
@@ -21,22 +21,11 @@ $babelCoreDependencies = $babelCorePackages[0]->getDependencies();
 
 ## Package Depth
 
-If you maybe don't just want all packages but only the direct dependencies plus one level of indirection, you have to go a little extra mile:
+You can also query packages by depth:
 
 ```php
-<?php
-use Mindscreen\YarnLock\YarnLock;
-
-// read the dependencies from the package.json file
-$packageDependencies = (json_decode(file_get_contents('package.json')))->dependencies;
-// get these packages from the yarn lock-file
-$rootDependencies = array_map(function($packageName, $packageVersion) use ($yarnLock) {
-    return $yarnLock->getPackage($packageName, $packageVersion);
-}, array_keys($packageDependencies), array_values($packageDependencies));
-// some of our dependencies might be used by other dependencies deeper down the tree so
-// they wouldn't appear in the top levels, if we wouldn't explicitly set them there.
-$yarnLock->calculateDepth($rootDependencies);
-
-// get the first two levels; the second argument is the exclusive upper limit
-$yarnLock->getPackagesByDepth(0, 2);
+// Get just the direct dependencies.
+$directDependencies = $yarnLock->getPackagesByDepth(0);
+// Get the first two levels of dependencies.
+$firstTwoLevels = $yarnLock->getPackagesByDepth(0, 2);
 ```