From fcbf63e62c627deae76c1b8cb8c0876c536ed811 Mon Sep 17 00:00:00 2001
From: Jari Vetoniemi <jari.vetoniemi@indooratlas.com>
Date: Mon, 16 Mar 2020 18:49:26 +0900
Subject: Fresh start

---
 jni/ruby/lib/rake/task_manager.rb | 310 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 310 insertions(+)
 create mode 100644 jni/ruby/lib/rake/task_manager.rb

(limited to 'jni/ruby/lib/rake/task_manager.rb')

diff --git a/jni/ruby/lib/rake/task_manager.rb b/jni/ruby/lib/rake/task_manager.rb
new file mode 100644
index 0000000..cbb9f5e
--- /dev/null
+++ b/jni/ruby/lib/rake/task_manager.rb
@@ -0,0 +1,310 @@
+module Rake
+
+  # The TaskManager module is a mixin for managing tasks.
+  module TaskManager
+    # Track the last comment made in the Rakefile.
+    attr_accessor :last_description
+
+    # TODO: Remove in Rake 11
+
+    alias :last_comment :last_description # :nodoc: Backwards compatibility
+
+    def initialize # :nodoc:
+      super
+      @tasks = Hash.new
+      @rules = Array.new
+      @scope = Scope.make
+      @last_description = nil
+    end
+
+    def create_rule(*args, &block) # :nodoc:
+      pattern, args, deps = resolve_args(args)
+      pattern = Regexp.new(Regexp.quote(pattern) + '$') if String === pattern
+      @rules << [pattern, args, deps, block]
+    end
+
+    def define_task(task_class, *args, &block) # :nodoc:
+      task_name, arg_names, deps = resolve_args(args)
+
+      original_scope = @scope
+      if String === task_name and
+         not task_class.ancestors.include? Rake::FileTask then
+        task_name, *definition_scope = *(task_name.split(":").reverse)
+        @scope = Scope.make(*(definition_scope + @scope.to_a))
+      end
+
+      task_name = task_class.scope_name(@scope, task_name)
+      deps = [deps] unless deps.respond_to?(:to_ary)
+      deps = deps.map { |d| Rake.from_pathname(d).to_s }
+      task = intern(task_class, task_name)
+      task.set_arg_names(arg_names) unless arg_names.empty?
+      if Rake::TaskManager.record_task_metadata
+        add_location(task)
+        task.add_description(get_description(task))
+      end
+      task.enhance(deps, &block)
+    ensure
+      @scope = original_scope
+    end
+
+    # Lookup a task.  Return an existing task if found, otherwise
+    # create a task of the current type.
+    def intern(task_class, task_name)
+      @tasks[task_name.to_s] ||= task_class.new(task_name, self)
+    end
+
+    # Find a matching task for +task_name+.
+    def [](task_name, scopes=nil)
+      task_name = task_name.to_s
+      self.lookup(task_name, scopes) or
+        enhance_with_matching_rule(task_name) or
+        synthesize_file_task(task_name) or
+        fail "Don't know how to build task '#{task_name}'"
+    end
+
+    def synthesize_file_task(task_name) # :nodoc:
+      return nil unless File.exist?(task_name)
+      define_task(Rake::FileTask, task_name)
+    end
+
+    # Resolve the arguments for a task/rule.  Returns a triplet of
+    # [task_name, arg_name_list, prerequisites].
+    def resolve_args(args)
+      if args.last.is_a?(Hash)
+        deps = args.pop
+        resolve_args_with_dependencies(args, deps)
+      else
+        resolve_args_without_dependencies(args)
+      end
+    end
+
+    # Resolve task arguments for a task or rule when there are no
+    # dependencies declared.
+    #
+    # The patterns recognized by this argument resolving function are:
+    #
+    #   task :t
+    #   task :t, [:a]
+    #
+    def resolve_args_without_dependencies(args)
+      task_name = args.shift
+      if args.size == 1 && args.first.respond_to?(:to_ary)
+        arg_names = args.first.to_ary
+      else
+        arg_names = args
+      end
+      [task_name, arg_names, []]
+    end
+    private :resolve_args_without_dependencies
+
+    # Resolve task arguments for a task or rule when there are
+    # dependencies declared.
+    #
+    # The patterns recognized by this argument resolving function are:
+    #
+    #   task :t => [:d]
+    #   task :t, [a] => [:d]
+    #
+    def resolve_args_with_dependencies(args, hash) # :nodoc:
+      fail "Task Argument Error" if hash.size != 1
+      key, value = hash.map { |k, v| [k, v] }.first
+      if args.empty?
+        task_name = key
+        arg_names = []
+        deps = value || []
+      else
+        task_name = args.shift
+        arg_names = key
+        deps = value
+      end
+      deps = [deps] unless deps.respond_to?(:to_ary)
+      [task_name, arg_names, deps]
+    end
+    private :resolve_args_with_dependencies
+
+    # If a rule can be found that matches the task name, enhance the
+    # task with the prerequisites and actions from the rule.  Set the
+    # source attribute of the task appropriately for the rule.  Return
+    # the enhanced task or nil of no rule was found.
+    def enhance_with_matching_rule(task_name, level=0)
+      fail Rake::RuleRecursionOverflowError,
+        "Rule Recursion Too Deep" if level >= 16
+      @rules.each do |pattern, args, extensions, block|
+        if pattern.match(task_name)
+          task = attempt_rule(task_name, args, extensions, block, level)
+          return task if task
+        end
+      end
+      nil
+    rescue Rake::RuleRecursionOverflowError => ex
+      ex.add_target(task_name)
+      fail ex
+    end
+
+    # List of all defined tasks in this application.
+    def tasks
+      @tasks.values.sort_by { |t| t.name }
+    end
+
+    # List of all the tasks defined in the given scope (and its
+    # sub-scopes).
+    def tasks_in_scope(scope)
+      prefix = scope.path
+      tasks.select { |t|
+        /^#{prefix}:/ =~ t.name
+      }
+    end
+
+    # Clear all tasks in this application.
+    def clear
+      @tasks.clear
+      @rules.clear
+    end
+
+    # Lookup a task, using scope and the scope hints in the task name.
+    # This method performs straight lookups without trying to
+    # synthesize file tasks or rules.  Special scope names (e.g. '^')
+    # are recognized.  If no scope argument is supplied, use the
+    # current scope.  Return nil if the task cannot be found.
+    def lookup(task_name, initial_scope=nil)
+      initial_scope ||= @scope
+      task_name = task_name.to_s
+      if task_name =~ /^rake:/
+        scopes = Scope.make
+        task_name = task_name.sub(/^rake:/, '')
+      elsif task_name =~ /^(\^+)/
+        scopes = initial_scope.trim($1.size)
+        task_name = task_name.sub(/^(\^+)/, '')
+      else
+        scopes = initial_scope
+      end
+      lookup_in_scope(task_name, scopes)
+    end
+
+    # Lookup the task name
+    def lookup_in_scope(name, scope)
+      loop do
+        tn = scope.path_with_task_name(name)
+        task = @tasks[tn]
+        return task if task
+        break if scope.empty?
+        scope = scope.tail
+      end
+      nil
+    end
+    private :lookup_in_scope
+
+    # Return the list of scope names currently active in the task
+    # manager.
+    def current_scope
+      @scope
+    end
+
+    # Evaluate the block in a nested namespace named +name+.  Create
+    # an anonymous namespace if +name+ is nil.
+    def in_namespace(name)
+      name ||= generate_name
+      @scope = Scope.new(name, @scope)
+      ns = NameSpace.new(self, @scope)
+      yield(ns)
+      ns
+    ensure
+      @scope = @scope.tail
+    end
+
+    private
+
+    # Add a location to the locations field of the given task.
+    def add_location(task)
+      loc = find_location
+      task.locations << loc if loc
+      task
+    end
+
+    # Find the location that called into the dsl layer.
+    def find_location
+      locations = caller
+      i = 0
+      while locations[i]
+        return locations[i + 1] if locations[i] =~ /rake\/dsl_definition.rb/
+        i += 1
+      end
+      nil
+    end
+
+    # Generate an anonymous namespace name.
+    def generate_name
+      @seed ||= 0
+      @seed += 1
+      "_anon_#{@seed}"
+    end
+
+    def trace_rule(level, message) # :nodoc:
+      options.trace_output.puts "#{"    " * level}#{message}" if
+        Rake.application.options.trace_rules
+    end
+
+    # Attempt to create a rule given the list of prerequisites.
+    def attempt_rule(task_name, args, extensions, block, level)
+      sources = make_sources(task_name, extensions)
+      prereqs = sources.map { |source|
+        trace_rule level, "Attempting Rule #{task_name} => #{source}"
+        if File.exist?(source) || Rake::Task.task_defined?(source)
+          trace_rule level, "(#{task_name} => #{source} ... EXIST)"
+          source
+        elsif parent = enhance_with_matching_rule(source, level + 1)
+          trace_rule level, "(#{task_name} => #{source} ... ENHANCE)"
+          parent.name
+        else
+          trace_rule level, "(#{task_name} => #{source} ... FAIL)"
+          return nil
+        end
+      }
+      task = FileTask.define_task(task_name, {args => prereqs}, &block)
+      task.sources = prereqs
+      task
+    end
+
+    # Make a list of sources from the list of file name extensions /
+    # translation procs.
+    def make_sources(task_name, extensions)
+      result = extensions.map { |ext|
+        case ext
+        when /%/
+          task_name.pathmap(ext)
+        when %r{/}
+          ext
+        when /^\./
+          task_name.ext(ext)
+        when String
+          ext
+        when Proc, Method
+          if ext.arity == 1
+            ext.call(task_name)
+          else
+            ext.call
+          end
+        else
+          fail "Don't know how to handle rule dependent: #{ext.inspect}"
+        end
+      }
+      result.flatten
+    end
+
+
+    private
+
+    # Return the current description, clearing it in the process.
+    def get_description(task)
+      desc = @last_description
+      @last_description = nil
+      desc
+    end
+
+    class << self
+      attr_accessor :record_task_metadata # :nodoc:
+      TaskManager.record_task_metadata = false
+    end
+  end
+
+end
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