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* lib/camping.rb: a few of zimbatm's wondrous patches (#32, got rid …
…of R class, using respond_to? :urls instead.) Also, trimmed down the `un`, `escape` and `table_name_prefix` methods to clear some space. * lib/camping-unabridged.rb: ditto. * lib/camping/reloader.rb: extracted from bin/camping, such an essential part of TheCampingServer. * bin/camping: console mode (#65 from zimbatm as well!)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| module Camping | ||
| # == The Camping Reloader | ||
| # | ||
| # Camping apps are generally small and predictable. Many Camping apps are | ||
| # contained within a single file. Larger apps are split into a handful of | ||
| # other Ruby libraries within the same directory. | ||
| # | ||
| # Since Camping apps (and their dependencies) are loaded with Ruby's require | ||
| # method, there is a record of them in $LOADED_FEATURES. Which leaves a | ||
| # perfect space for this class to manage auto-reloading an app if any of its | ||
| # immediate dependencies changes. | ||
| # | ||
| # == Wrapping Your Apps | ||
| # | ||
| # Since bin/camping and the Camping::FastCGI class already use the Reloader, | ||
| # you probably don't need to hack it on your own. But, if you're rolling your | ||
| # own situation, here's how. | ||
| # | ||
| # Rather than this: | ||
| # | ||
| # require 'yourapp' | ||
| # | ||
| # Use this: | ||
| # | ||
| # require 'camping/reloader' | ||
| # Camping::Reloader.new('/path/to/yourapp.rb') | ||
| # | ||
| # The reloader will take care of requiring the app and monitoring all files | ||
| # for alterations. | ||
| class Reloader | ||
| attr_accessor :klass, :mtime, :mount, :requires | ||
|
|
||
| # Creates the reloader, assigns a +script+ to it and initially loads the | ||
| # application. Pass in the full path to the script, otherwise the script | ||
| # will be loaded relative to the current working directory. | ||
| def initialize(script) | ||
| @script = File.expand_path(script) | ||
| @mount = File.basename(script, '.rb') | ||
| @requires = nil | ||
| load_app | ||
| end | ||
|
|
||
| # Loads (or reloads) the application. The reloader will take care of calling | ||
| # this for you. You can certainly call it yourself if you feel it's warranted. | ||
| def load_app | ||
| title = File.basename(@script)[/^([\w_]+)/,1].gsub /_/,'' | ||
| begin | ||
| all_requires = $LOADED_FEATURES.dup | ||
| load @script | ||
| @requires = ($LOADED_FEATURES - all_requires).select do |req| | ||
| req.index(File.basename(@script) + "/") == 0 || req.index(title + "/") == 0 | ||
| end | ||
| rescue Exception => e | ||
| puts "!! trouble loading #{title}: [#{e.class}] #{e.message}" | ||
| @klass = nil | ||
| return | ||
| end | ||
|
|
||
| @mtime = mtime | ||
| @klass = Object.const_get(Object.constants.grep(/^#{title}$/i)[0]) rescue nil | ||
| unless @klass and @klass.const_defined? :C | ||
| puts "!! trouble loading #{title}: not a Camping app" | ||
| @klass = nil | ||
| return | ||
| end | ||
| @klass.create if @klass.respond_to? :create | ||
| @klass | ||
| end | ||
|
|
||
| # The timestamp of the most recently modified app dependency. | ||
| def mtime | ||
| ((@requires || []) + [@script]).map do |fname| | ||
| fname = fname.gsub(/^#{Regexp::quote File.dirname(@script)}\//, '') | ||
| File.mtime(File.join(File.dirname(@script), fname)) | ||
| end.max | ||
| end | ||
|
|
||
| # Conditional reloading of the app. This gets called on each request and | ||
| # only reloads if the modification times on any of the files is updated. | ||
| def reload_app | ||
| return if @klass and @mtime and mtime <= @mtime | ||
|
|
||
| if @requires | ||
| @requires.each { |req| $LOADED_FEATURES.delete(req) } | ||
| end | ||
| k = @klass | ||
| Object.instance_eval { remove_const k.name } if k | ||
| load_app | ||
| end | ||
|
|
||
| # Conditionally reloads (using reload_app.) Then passes the request through | ||
| # to the wrapped Camping app. | ||
| def run(*a) | ||
| reload_app | ||
| if @klass | ||
| @klass.run(*a) | ||
| else | ||
| Camping.run(*a) | ||
| end | ||
| end | ||
|
|
||
| # Returns source code for the main script in the application. | ||
| def view_source | ||
| File.read(@script) | ||
| end | ||
| end | ||
| end |