Revert converting `1.0.0` to `^1.0`.

doc/articles/plugins.md

@@ -32,13 +32,7 @@ requirements:
    to define which Plugin API versions your plugin is compatible with.
 
 The required version of the `composer-plugin-api` follows the same [rules][7]
-as a normal package's, except for the `1.0`, `1.0.0` and `1.0.0.0` _exact_ 
-values. In only these three cases, Composer will assume your plugin 
-actually meant `^1.0` instead. This was introduced to maintain BC with 
-the old style of declaring the Plugin API version.  
-  
-In other words, `"require": { "composer-plugin-api": "1.0.0" }` means
-`"require": { "composer-plugin-api": "^1.0" }`.
+as a normal package's.
 
 The current composer plugin API version is 1.0.0.
 

src/Composer/Package/Version/VersionParser.php

@@ -228,27 +228,12 @@ class VersionParser
                 $parsedConstraint = $this->parseConstraints($constraint);
             }
 
-            // if the required Plugin API version is exactly "1.0.0", convert it to "^1.0", to keep BC
-            if ('composer-plugin-api' === strtolower($target) && $this->isOldStylePluginApiVersion($constraint)) {
-                $parsedConstraint = $this->parseConstraints('^1.0');
-            }
-
             $res[strtolower($target)] = new Link($source, $target, $parsedConstraint, $description, $constraint);
         }
 
         return $res;
     }
 
-    /**
-     * @param string $requiredPluginApiVersion
-     * @return bool
-     */
-    private function isOldStylePluginApiVersion($requiredPluginApiVersion)
-    {
-        // catch "1.0", "1.0.0", "1.0.0.0" etc.
-        return (bool) preg_match('#^1(\.0)++$#', trim($requiredPluginApiVersion));
-    }
-
     /**
      * Parses as constraint string into LinkConstraint objects
      *

tests/Composer/Test/Package/Version/VersionParserTest.php

@@ -515,18 +515,12 @@ class VersionParserTest extends \PHPUnit_Framework_TestCase
         );
     }
 
-    public function oldStylePluginApiVersions()
+    public function pluginApiVersions()
     {
         return array(
             array('1.0'),
             array('1.0.0'),
             array('1.0.0.0'),
-        );
-    }
-
-    public function newStylePluginApiVersions()
-    {
-        return array(
             array('1'),
             array('=1.0.0'),
             array('==1.0'),
@@ -543,23 +537,9 @@ class VersionParserTest extends \PHPUnit_Framework_TestCase
     }
 
     /**
-     * @dataProvider oldStylePluginApiVersions
-     */
-    public function testOldStylePluginApiVersionGetsConvertedIntoAnotherConstraintToKeepBc($apiVersion)
-    {
-        $parser = new VersionParser;
-
-        /** @var Link[] $links */
-        $links = $parser->parseLinks('Plugin', '9.9.9', '', array('composer-plugin-api' => $apiVersion));
-
-        $this->assertArrayHasKey('composer-plugin-api', $links);
-        $this->assertSame('^1.0', $links['composer-plugin-api']->getConstraint()->getPrettyString());
-    }
-
-    /**
-     * @dataProvider newStylePluginApiVersions
+     * @dataProvider pluginApiVersions
      */
-    public function testNewStylePluginApiVersionAreKeptAsDeclared($apiVersion)
+    public function testPluginApiVersionAreKeptAsDeclared($apiVersion)
     {
         $parser = new VersionParser;
 

tests/Composer/Test/Plugin/PluginInstallerTest.php

@@ -249,21 +249,21 @@ class PluginInstallerTest extends TestCase
         $this->pm->loadInstalledPlugins();
     }
 
-    public function testOldPluginVersionStyleWorksWithAPIUntil199()
+    public function testExactPluginVersionStyleAreRegisteredCorrectly()
     {
-        $pluginsWithOldStyleAPIVersions = array(
+        $pluginsWithFixedAPIVersions = array(
             $this->packages[0],
             $this->packages[1],
             $this->packages[2],
         );
 
-        $this->setPluginApiVersionWithPlugins('1.0.0', $pluginsWithOldStyleAPIVersions);
+        $this->setPluginApiVersionWithPlugins('1.0.0', $pluginsWithFixedAPIVersions);
         $this->assertCount(3, $this->pm->getPlugins());
 
-        $this->setPluginApiVersionWithPlugins('1.9.9', $pluginsWithOldStyleAPIVersions);
-        $this->assertCount(3, $this->pm->getPlugins());
+        $this->setPluginApiVersionWithPlugins('1.0.1', $pluginsWithFixedAPIVersions);
+        $this->assertCount(0, $this->pm->getPlugins());
 
-        $this->setPluginApiVersionWithPlugins('2.0.0-dev', $pluginsWithOldStyleAPIVersions);
+        $this->setPluginApiVersionWithPlugins('2.0.0-dev', $pluginsWithFixedAPIVersions);
         $this->assertCount(0, $this->pm->getPlugins());
     }