From 36c00a4509e745e4b29b1194faca4dca830a9b95 Mon Sep 17 00:00:00 2001
From: Paul Buetow <paul@buetow.org>
Date: Fri, 6 Dec 2024 23:50:13 +0200
Subject: more on this

---
 Gemfile                    |  1 +
 Gemfile.lock               |  4 ++++
 Rakefile                   | 13 +++++++++----
 lib/autorequire/file.rb    | 37 ++++++++++++++++++++++++++++++++-----
 lib/autorequire/log.rb     | 11 ++++++++---
 lib/autorequire/options.rb |  4 ++--
 lib/rcm.rb                 | 11 +++++++----
 7 files changed, 63 insertions(+), 18 deletions(-)

diff --git a/Gemfile b/Gemfile
index f41482e..6bc7a34 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,3 +1,4 @@
 source 'https://rubygems.org'
 
 gem 'toml'
+gem 'erb'
diff --git a/Gemfile.lock b/Gemfile.lock
index 540a42c..fe13324 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,6 +1,9 @@
 GEM
   remote: https://rubygems.org/
   specs:
+    cgi (0.4.1)
+    erb (4.0.4)
+      cgi (>= 0.3.3)
     parslet (2.0.0)
     toml (0.3.0)
       parslet (>= 1.8.0, < 3.0.0)
@@ -10,6 +13,7 @@ PLATFORMS
   x86_64-linux
 
 DEPENDENCIES
+  erb
   toml
 
 BUNDLED WITH
diff --git a/Rakefile b/Rakefile
index 4e7f68b..8c35269 100644
--- a/Rakefile
+++ b/Rakefile
@@ -3,13 +3,18 @@ require_relative 'lib/rcm'
 desc 'Set up wireguard mesh'
 task :wireguard do
   make_it_so do
-    p option :verbose
-    dump_config
+    # p option :verbose
+    # dump_config
     only_when { hostname is :earth }
 
     file '/tmp/test/wg/wg0.conf' do
-      create_parent
-      content 'the content is here'
+      create_parent_directory
+      from_template content 'the content is here and the result is <%= 1 + 2 %>'
+    end
+
+    file '/tmp/test/wg/wg1.conf' do
+      create_parent_directory
+      from_file content './Rakefile'
     end
   end
 end
diff --git a/lib/autorequire/file.rb b/lib/autorequire/file.rb
index 3233015..35df33f 100644
--- a/lib/autorequire/file.rb
+++ b/lib/autorequire/file.rb
@@ -1,30 +1,48 @@
+require 'erb'
 require 'fileutils'
+
+require_relative 'options'
 require_relative 'log'
 
 module RCM
   # Managing files
   class File
-    attr_reader :path
+    attr_reader :id, :path
 
+    include Options
     include Log
 
     def initialize(path)
+      @id = "#{self.class}(#{path})"
       @path = path
     end
 
+    def to_s
+      id
+    end
+
     def content(content = nil)
       content.nil? ? @content : @content = content
     end
 
-    def create_parent
+    def create_parent_directory
       @create_parent = true
+      self
     end
 
-    def to_s
-      @path
+    def from_file(...)
+      @from_file = true
+      self
+    end
+
+    def from_template(...)
+      @from_template = true
+      self
     end
 
     def do!
+      content = file_content
+
       dirname = ::File.dirname(@path)
       if !::File.directory?(dirname) && @create_parent
         info "Creating parent directory #{parent}"
@@ -32,10 +50,19 @@ module RCM
       end
 
       info "Creating file #{@path}"
+      debug content if option :debug
+
       tmp_path = "#{@path}.tmp"
-      ::File.write(tmp_path, @content)
+      ::File.write(tmp_path, content)
       ::File.rename(tmp_path, @path)
     end
+
+    private
+
+    def file_content
+      content = @from_file ? ::File.read(@content) : @content
+      @from_template ? ERB.new(content).result : content
+    end
   end
 
   # Add file keyword to the DSL
diff --git a/lib/autorequire/log.rb b/lib/autorequire/log.rb
index 0fe9ea9..67ff321 100644
--- a/lib/autorequire/log.rb
+++ b/lib/autorequire/log.rb
@@ -5,15 +5,20 @@ module RCM
     @@logger = Logger.new(STDOUT)
 
     def info(message)
-      @@logger.info("#{self.class}(#{self}): #{message}")
+      @@logger.info("#{id} => #{message}")
     end
 
     def warn(message)
-      @@logger.warn("#{self.class}(#{self}): #{message}")
+      @@logger.warn("#{id} => #{message}")
+    end
+
+    def fatal_exit(message)
+      @@logger.fatal("#{id} => #{message}")
+      exit 2
     end
 
     def debug(message)
-      @@logger.debug("#{self.class}(#{self}): #{message}")
+      @@logger.debug("#{id} => #{message}")
     end
   end
 end
diff --git a/lib/autorequire/options.rb b/lib/autorequire/options.rb
index de54888..c3950ca 100644
--- a/lib/autorequire/options.rb
+++ b/lib/autorequire/options.rb
@@ -4,14 +4,14 @@ module RCM
   # Command line options
   module Options
     @@options = {
-      verbose: false
+      debug: false
     }
 
     after_double_dash = ARGV.slice_before('--').to_a.last.drop(1)
 
     OptionParser.new do |opts|
       opts.banner = 'Usage: rake [task] -- [options]'
-      opts.on('-v', '--[no-]verbose', 'run verbosely') { |v| @@options[:verbose] = v }
+      opts.on('-v', '--[no-]debug', 'debug output') { |v| @@options[:debug] = v }
     end.parse!(after_double_dash)
 
     def option(key)
diff --git a/lib/rcm.rb b/lib/rcm.rb
index d9880eb..1f45c39 100644
--- a/lib/rcm.rb
+++ b/lib/rcm.rb
@@ -4,6 +4,8 @@ Dir["#{Dir.pwd}/lib/autorequire/*.rb"].each { |m| require m }
 module RCM
   # Here all starts
   class RCM
+    attr_reader :id
+    
     @@rcm_counter = 0
 
     include Config
@@ -11,10 +13,10 @@ module RCM
     include Log
 
     def initialize
-      @objs = []
+      @id = "#{self.class}(#{@@rcm_counter})"
+      @objs = {}
       @conds_met = true
       @@rcm_counter += 1
-      @number = @@rcm_counter
     end
 
     def to_s
@@ -22,11 +24,12 @@ module RCM
     end
 
     def do!
-      @objs.each(&:do!)
+      @objs.each_value(&:do!)
     end
 
     def <<(obj)
-      @objs << obj
+      fatal_exit "Object #{obj.id} already declared!" if @objs.key?(obj.id)
+      @objs[obj.id] = obj
     end
   end
 end
-- 
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