Add task config_files:convert_init_script - it does the ugly variable replacement and uncomments the RAILS_ENV setting and exporting (substituting in the current RAILS_ENV) if there's no config/rails_env.rb

1 files changed, 76 insertions, 0 deletions

diff --git a/lib/tasks/config_files.rake b/lib/tasks/config_files.rake
new file mode 100644
index 000000000..1dcdde79a
--- /dev/null
+++ b/lib/tasks/config_files.rake
@@ -0,0 +1,76 @@
+namespace :config_files do
+
+    def usage_message message
+        puts ''
+        puts message
+        puts ''
+        exit 0
+    end
+
+    def check_for_env_vars(env_vars, example)
+        missing = []
+        env_vars.each do |env_var|
+            unless ENV[env_var]
+                missing << env_var
+            end
+        end
+        if !missing.empty?
+            usage = "Usage: This task requires #{env_vars.to_sentence} - missing #{missing.to_sentence}"
+            if example
+                usage += "\nExample: #{example}"
+            end
+            usage_message usage
+        end
+    end
+
+    def convert_ugly(file, replacements)
+        converted_lines = []
+        ugly_var = /\!\!\(\*= \$([^ ]+) \*\)\!\!/
+        File.open(file, 'r').each do |line|
+            line = line.gsub(ugly_var) do |match|
+                var = $1.to_sym
+                replacement = replacements[var]
+                if replacement == nil
+                    if ! (skip[var] == true)
+                        raise "Unhandled variable in .ugly file: $#{var}"
+                    else
+                        match
+                    end
+                else
+                    replacements[var]
+                end
+            end
+            converted_lines << line
+        end
+        converted_lines
+    end
+
+    desc 'Convert Debian .ugly init script in config to a form suitable for installing in /etc/init.d'
+    task :convert_init_script => :environment do
+        example = 'rake config_files:convert_init_script DEPLOY_USER=deploy VHOST_DIR=/dir/above/alaveteli SCRIPT_FILE=config/alert-tracks-debian.ugly '
+        check_for_env_vars(['DEPLOY_USER', 'VHOST_DIR', 'SCRIPT_FILE'], example)
+
+        deploy_user = ENV['DEPLOY_USER']
+        vhost_dir = ENV['VHOST_DIR']
+        script_file = ENV['SCRIPT_FILE']
+
+        replacements = { :user => deploy_user,
+                         :vhost_dir => vhost_dir }
+
+        daemon_name = File.basename(script_file, '-debian.ugly')
+        replacements.update(:daemon_name => "foi-#{daemon_name}")
+        converted = convert_ugly(script_file, replacements)
+        rails_env_file = File.expand_path(File.join(Rails.root, 'config', 'rails_env.rb'))
+        if !File.exists?(rails_env_file)
+            converted.each do |line|
+                line.gsub!(/^#\s*RAILS_ENV=your_rails_env/, "RAILS_ENV=#{Rails.env}")
+                line.gsub!(/^#\s*export RAILS_ENV/, "export RAILS_ENV")
+            end
+        end
+        converted.each do |line|
+            puts line
+        end
+    end
+
+
+end
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