document installer flow in doc/InstallerFlow.md

Author: c9s

doc/InstallerFlow.md

@@ -0,0 +1,24 @@
+Installer Flow
+===============
+
+1. read the package.ini from current directory.
+    
+    see Onion\Command\InstallCommand
+
+    and use PackageConfigReader to read config file:
+
+        $reader = new \Onion\PackageConfigReader;
+
+
+2. create a dependency resolver object
+
+    pass the package meta information to dependency resolver
+    and resolve all package dependencies.
+
+    the package dependencies are stored in a dependency pool of dependency resolver.
+
+3. create an installer, iterating all dependencies and use specific installer for each package.
+
+    For PEAR packages, use PEARInstaller
+    For Library files, use LibraryInstaller (not support yet)
+

src/Onion/Installer/PearInstaller.php

@@ -14,6 +14,13 @@
 
 // xxx: use logger to parse
 
+
+
+/**
+ *
+ *
+ *
+ */
 class PearInstaller 
     implements InstallerInterface
 {
@@ -28,7 +35,6 @@ function __construct($main)
     function install( $package ) 
     {
         $logger = \Onion\Application::getLogger();
-
         $logger->info( "Installing {$package->name}" );
 
         // create temp dir