Add crew whatprovides command

crew

@@ -28,7 +28,6 @@ case ARCH
     SHORTARCH="32"
 end
 
-
 $LOAD_PATH.unshift "#{CREW_LIB_PATH}lib"
 
 USER = `whoami`.chomp
@@ -52,8 +51,8 @@ end
 def list_packages
   Find.find (CREW_LIB_PATH + 'packages') do |filename|
     Find.find(CREW_CONFIG_PATH + 'meta/') do |packageList|
-        packageName = File.basename filename, '.rb'
-        print '(i) ' if packageList == CREW_CONFIG_PATH + 'meta/' + packageName + '.filelist' 
+      packageName = File.basename filename, '.rb'
+      print '(i) ' if packageList == CREW_CONFIG_PATH + 'meta/' + packageName + '.filelist'
     end
     puts File.basename filename, '.rb' if File.extname(filename) == '.rb'
   end
@@ -66,6 +65,29 @@ def search (pkgName, silent = false)
   abort "package #{pkgName} not found :("
 end
 
+def whatprovides (pkgName, silent = false)
+  found = nil
+  packageName = ''
+  fileName = pkgName + "\n"
+  Find.find (CREW_LIB_PATH + 'packages') do |filename|
+    Find.find (CREW_CONFIG_PATH + 'meta/') do |packageList|
+      packageName = File.basename filename, '.rb'
+      fileList = CREW_CONFIG_PATH + 'meta/' + packageName + '.filelist'
+      if File.file?(fileList)
+        File.readlines(fileList).each do |line|
+          if line == fileName
+            found = true
+            break
+          end
+        end
+      end
+      break if found
+    end
+    break if found
+  end
+  puts packageName + ': ' + fileName if found
+end
+
 def update
   abort "'crew update' is used to update crew itself. Use 'crew upgrade <packageName> to upgrade a specific package." if @pkgName
 
@@ -371,6 +393,12 @@ when "search"
   else
     list_packages
   end
+when "whatprovides"
+  if @pkgName
+    whatprovides @pkgName
+  else
+    puts "Usage: crew whatprovides [filepath]"
+  end
 when "download"
   search @pkgName
   download
@@ -388,8 +416,8 @@ when "remove"
 when nil
   puts "Chromebrew, version 0.2.1"
   puts "Usage: crew [command] [package]"
-  puts "Available commands: search, download, install, remove"
+  puts "Available commands: search, download, install, remove, whatprovides"
 else
   puts "I have no idea how to do #{@command} :("
-  puts "Available commands: search, download, install, remove"
+  puts "Available commands: search, download, install, remove, whatprovides"
 end