Method: Rant::SignedSourceNode#signature

Defined in:
lib/rant/import/nodes/signed.rb

#signature(opt = INVOKE_OPT) ⇒ Object

Invokes prerequisites and returns a signature of the source file and all related source files. Note: The signature will only be calculated once.



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# File 'lib/rant/import/nodes/signed.rb', line 34

def signature(opt = INVOKE_OPT)
    return circular_dep if @run
    @run = true
    begin
        return @signature if @signature
        goto_task_home
        sig_list = []
        sig = @rac.var._get("__signature__")
        if test(?f, @name)
            @signature = sig.signature_for_file(@name)
        else
            @rac.abort_at(ch,
                "SourceNode: no such file -- #@name")
        end
        sd = project_subdir
        handled = {@name => true}
        @pre.each { |f|
            f = f.to_rant_target
            next if handled.include? f
            nodes = rac.resolve f, sd
            if nodes.empty?
                if test(?f, f)
                    sig_list << sig.signature_for_file(f)
                else
                    rac.abort_at(ch,
                        "SourceNode: no such file -- #{f}")
                end
            else
                file_sig = nil
                nodes.each { |node|
                    node.invoke(opt)
                    if node.respond_to? :signature
                        sig_list << node.signature
                        goto_task_home
                    else
                        rac.abort_at(ch,
                            "SourceNode can't depend on #{node.name}")
                    end
                }
                sig_list << file_sig if file_sig
            end
            handled[f] = true
        }
        sig_list.sort!
        @signature << sig_list.join
    ensure
        @run = false
    end
end