Class: Rant::Generators::SignedFile

Inherits:
Object
  • Object
show all
Includes:
Node
Defined in:
lib/rant/import/signedfile.rb

Direct Known Subclasses

AutoSubSignedFile, SignedDirectory

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Node

#inspect

Constructor Details

#initialize(rac, name, prerequisites, &block) ⇒ SignedFile

Returns a new instance of SignedFile.



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# File 'lib/rant/import/signedfile.rb', line 26

def initialize(rac, name, prerequisites, &block)
    super()
    @rac = rac
    @name = name
    @pre = prerequisites or
        raise ArgumentError, "prerequisites required"
    @block = block
    @run = false
    @receiver = nil
end

Instance Attribute Details

#receiver ⇒ Object

Returns the value of attribute receiver.



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# File 'lib/rant/import/signedfile.rb', line 24

def receiver
  @receiver
end

Class Method Details

.rant_gen(rac, ch, args, &block) ⇒ Object 



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# File 'lib/rant/import/signedfile.rb', line 15

def self.rant_gen(rac, ch, args, &block)
    unless args.size == 1
        rac.abort_at(ch, "SignedFile: too many arguments")
    end
    rac.prepare_task(args.first, block, ch) { |name,pre,blk|
        self.new(rac, name, pre, &blk)
    }
end

Instance Method Details

#<<(pre) ⇒ Object 



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# File 'lib/rant/import/signedfile.rb', line 50

def <<(pre)
    @pre << pre
end

#each_target {|@name| ... } ⇒ Object

Yields:

  • (@name) 


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# File 'lib/rant/import/signedfile.rb', line 128

def each_target
    goto_task_home
    yield @name
end

#enhance(deps = nil, &blk) ⇒ Object 



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# File 'lib/rant/import/signedfile.rb', line 59

def enhance(deps = nil, &blk)
    @pre.concat(deps) if deps
    if @block
        if blk
            first_block = @block
            @block = lambda { |t|
                first_block[t]
                blk[t]
            }
        end
    else
        @block = blk
    end
end

#fail? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rant/import/signedfile.rb', line 56

def fail?
    @success == false
end

#file_target? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rant/import/signedfile.rb', line 47

def file_target?
    true
end

#has_actions? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rant/import/signedfile.rb', line 44

def has_actions?
    @block or @receiver && @receiver.has_pre_action?
end

#invoke(opt = INVOKE_OPT) ⇒ Object 



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# File 'lib/rant/import/signedfile.rb', line 73

def invoke(opt = INVOKE_OPT)
    return circular_dep if @run
    @run = true
    begin
        return if done?
        goto_task_home
        @cur_checksums = []
        @sigs = @rac.var._get("__signature__")
        @md = @rac.var._get("__metadata__")
        key = "prerequisites_sig_#{@sigs.name}"
        target_key = "target_sig_#{@sigs.name}"
        up = signed_process_prerequisites(opt)
        up ||= opt[:force]
        up = true if @receiver && @receiver.update?(self)
        @cur_checksums.sort!
        check_str = @cur_checksums.join
        @cur_checksums = nil
        old_check_str = @md.path_fetch(key, @name)
        old_target_str = @md.path_fetch(target_key, @name)
        # check explicitely for plain file, thus allow the
        # target of a SignedFile to be a directory ;)
        if test(?f, @name)
            target_str = @sigs.signature_for_file(@name)
        else
            target_str = ""
            up ||= !File.exist?(@name)
        end
        check_str_changed = old_check_str != check_str
        target_changed = old_target_str != target_str
        up ||= check_str_changed || target_changed
        return up if opt[:needed?]
        return false unless up
        # run action and save checksums
        run
        goto_task_home
        target_str = test(?f, @name) ?
            @sigs.signature_for_file(@name) : ""
        target_changed = target_str != old_target_str
        if target_changed
            @md.path_set(target_key, target_str, @name)
        end
        if check_str_changed
            @md.path_set(key, check_str, @name)
        end
        @success = true
        return target_changed
    rescue TaskFail => e
        raise
    rescue Exception => e
        self.fail(nil, e)
    ensure
        @md = @sigs = nil
        @run = false
    end
end

#invoked? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/rant/import/signedfile.rb', line 53

def invoked?
    !@success.nil?
end

#prerequisites ⇒ Object Also known as: deps 



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# File 'lib/rant/import/signedfile.rb', line 36

def prerequisites
    @pre
end

#signature ⇒ Object 



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# File 'lib/rant/import/signedfile.rb', line 135

def signature
    goto_task_home
    sigs = @rac.var._get("__signature__")
    md = @rac.var._get("__metadata__")
    key = "target_sig_#{sigs.name}"
    md.path_fetch(key, @name)
end

#source ⇒ Object

first prerequisite



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# File 'lib/rant/import/signedfile.rb', line 41

def source
    @pre.first.to_s
end

#timestamp(opt = INVOKE_OPT) ⇒ Object 



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# File 'lib/rant/import/signedfile.rb', line 132

def timestamp(opt = INVOKE_OPT)
    File.exist?(@name) ? File.mtime(@name) : T0
end