Implemented a nanoc server command. Fixes #33

README.md

@@ -23,6 +23,7 @@ in scope before compiling:
 #### Optional dependencies
 * [optipng] for optimizing PNG images
 * A Java 8 runtime for running the [Nu HTML] checker.
+* [OpenResty] for running the dynamic parts of the site via `nanoc server`.
 
 ### Then clone this repo (including submodules), install bower components and Ruby gems…
 
@@ -58,7 +59,8 @@ $ nanoc view   # if you are only dealing with statically generated pages
 $ nanoc server # if you are dealing with both the static and dynamic aspects of the site
 ```
 
-And view the page in your browser.
+And view the page in your browser at [port 3000](http://localhost:3000/) for
+`nanoc view` or [port 4125](https://localhost:4125/) for `nanoc server`.
 
 ## Contributing
 
@@ -95,3 +97,4 @@ Also, please see [the colophon][colophon] for more raving attributions!
 [pygments]: <http://pygments.org/>
 [bundler]: <http://bundler.io/>
 [colophon]: <https://pentandra.com/colophon/>
+[OpenResty]: <http://openresty.org/>

commands/server.rb

@@ -0,0 +1,98 @@
+usage 'server [options]'
+summary 'start the dynamic web server (nginx/OpenResty)'
+description <<-EOS
+Start the dynamic web server. Running this web server requires OpenResty
+to be installed and in scope.
+EOS
+
+required :c, :conf,   'specify the configuration file to use (default: nginx.conf)'
+required :g, :global, 'specify any global directives (default: daemon off;)'
+
+module LifePreserver
+  class Server < ::Nanoc::CLI::CommandRunner
+    NGINX_BIN = 'nginx'
+    NGINX_SEARCH_PATHS = [
+      '/usr/local/openresty/nginx/sbin/',
+      '/usr/local/opt/openresty/bin/',
+      '/usr/local/bin/',
+      '/usr/sbin/',
+      '/opt/openresty/nginx/sbin/'
+    ]
+
+    class Error < ::Nanoc::Int::Errors::Generic
+      def initialize(command, exit_code)
+        @command   = command
+        @exit_code = exit_code
+      end
+
+      def message
+        "command exited with a nonzero status code #{@exit_code} (command: #{@command.join(' ')})"
+      end
+    end
+
+    def run
+      require 'open3'
+
+      load_site
+
+      conf = options[:conf] || 'nginx.conf'
+      directives = options[:global] || 'daemon off;'
+
+
+      nginx = find_nginx
+      output_dir = site.config[:output_dir]
+      cmd = [ nginx, '-p', output_dir, '-c', conf, '-g', directives ]
+
+      Open3.popen3(*cmd) do |_stdin, stdout, stderr, wait_thr|
+        puts "Starting OpenResty (#{nginx}) in path (#{output_dir}) with config (#{conf}) and global directives (#{directives})"
+
+        stdout_thread = Thread.new do
+          while (line = stdout.gets)
+            puts line
+          end
+        end
+
+        stderr_thread = Thread.new do
+          while (line = stderr.gets)
+            puts line
+          end
+        end
+
+        stdout_thread.join
+        stderr_thread.join
+
+        exit_status = wait_thr.value
+        unless exit_status.success?
+          raise Error.new(cmd, exit_status.to_i)
+        end
+      end
+    end
+
+    protected
+
+    def find_nginx
+      NGINX_SEARCH_PATHS.each do |path|
+        to_check = path + NGINX_BIN
+        if File.file?(to_check) && openresty?(to_check)
+          return to_check
+        end
+      end
+
+      # As a last resort, check the PATH
+      require 'mkmf'
+      to_check = find_executable0(NGINX_BIN)
+      if to_check && openresty?(to_check)
+        return to_check
+      end
+
+      raise "Cannot find the OpenResty executable in any of the following places: #{NGINX_SEARCH_PATHS.join(':')} or in the current path: #{ENV['PATH']}"
+    end
+
+    def openresty?(path_to_check)
+      output, _status = Open3.capture2e(path_to_check, '-v')
+      output && output['openresty']
+    end
+  end
+end
+
+runner LifePreserver::Server

items/nginx.conf

@@ -32,10 +32,6 @@ error_log <% if @config[:production] %>logs/error.log warn<% else %>stderr info<
 # The file storing the process ID of the main process
 pid <%= @config[:server][:pid_file] %>;
 
-<% unless @config[:production] %>
-daemon off;
-<% end %>
-
 http {
 
   # Hide nginx version information.