1 files changed, 23 insertions, 6 deletions
diff --git a/railties/lib/rails/tasks/log.rake b/railties/lib/rails/tasks/log.rake
index 877f175ef3..ba796845d7 100644
--- a/railties/lib/rails/tasks/log.rake
+++ b/railties/lib/rails/tasks/log.rake
@@ -1,5 +1,12 @@
 namespace :log do
-  desc "Truncates all *.log files in log/ to zero bytes (specify which logs with LOGS=test,development)"
+
+  ##
+  # Truncates all/specified log files
+  # ENV['LOGS']
+  #   - defaults to all environments log files i.e. 'development,test,production'
+  #   - ENV['LOGS']=all truncates all files i.e. log/*.log
+  #   - ENV['LOGS']='test,development' truncates only specified files
+  desc "Truncates all/specified *.log files in log/ to zero bytes (specify which logs with LOGS=test,development)"
   task :clear do
     log_files.each do |file|
       clear_log_file(file)
@@ -7,17 +14,27 @@ namespace :log do
   end
 
   def log_files
-    if ENV['LOGS']
-      ENV['LOGS'].split(',')
-                  .map    { |file| "log/#{file.strip}.log" }
-                  .select { |file| File.exist?(file) }
-    else
+    if ENV["LOGS"] == "all"
       FileList["log/*.log"]
+    elsif ENV["LOGS"]
+      log_files_to_truncate(ENV["LOGS"])
+    else
+      log_files_to_truncate(all_environments.join(","))
     end
   end
 
+  def log_files_to_truncate(envs)
+    envs.split(",")
+        .map    { |file| "log/#{file.strip}.log" }
+        .select { |file| File.exist?(file) }
+  end
+
   def clear_log_file(file)
     f = File.open(file, "w")
     f.close
   end
+
+  def all_environments
+    Dir["config/environments/*.rb"].map { |fname| File.basename(fname, ".*") }
+  end
 end