Class: Dply::Linker

Inherits:
Object
  • Object
show all
Includes:
Helper
Defined in:
lib/dply/linker.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Helper

#cmd, #error, #git, #logger, #stringify_values!, #symlink

Constructor Details

#initialize(src_dir, dest_dir, map: {}) ⇒ Linker

Returns a new instance of Linker.



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# File 'lib/dply/linker.rb', line 9

def initialize(src_dir, dest_dir, map: {})
  verify_absolute src_dir, dest_dir
  @src_dir = src_dir
  @dest_dir = dest_dir
  @map = map
end

Instance Attribute Details

#dest_dir ⇒ Object (readonly)

Returns the value of attribute dest_dir.



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# File 'lib/dply/linker.rb', line 7

def dest_dir
  @dest_dir
end

#map ⇒ Object (readonly)

Returns the value of attribute map.



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# File 'lib/dply/linker.rb', line 7

def map
  @map
end

#src_dir ⇒ Object (readonly)

Returns the value of attribute src_dir.



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# File 'lib/dply/linker.rb', line 7

def src_dir
  @src_dir
end

Instance Method Details



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# File 'lib/dply/linker.rb', line 16

def create_symlinks
  mapped_files.each do |f|
    target = link_target(f)
    source = link_source(f)
    relative_source = link_relative_source(source, target)
    logger.debug "linking #{target} -> #{source}"
    error "source #{source} doesn't exist" if not File.exist? source
    symlink(relative_source, target)
  end
end

#link_relative_source(source, target) ⇒ Object 



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# File 'lib/dply/linker.rb', line 36

def link_relative_source(source, target)
  source.relative_path_from target.parent
end

#link_source(relative_target) ⇒ Object 



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# File 'lib/dply/linker.rb', line 31

def link_source(relative_target)
  relative_source = map[relative_target]
  Pathname.new "#{src_dir}/#{relative_source}"
end

#link_target(relative_target) ⇒ Object 



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# File 'lib/dply/linker.rb', line 27

def link_target(relative_target)
  Pathname.new "#{dest_dir}/#{relative_target}"
end

#mapped_files ⇒ Object 



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# File 'lib/dply/linker.rb', line 40

def mapped_files
  map.keys.collect do |k|
    path = Pathname.new k 
    raise "config map path cannot be absoulte" if path.absolute?
    k
  end
end

#verify_absolute(*paths) ⇒ Object 



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# File 'lib/dply/linker.rb', line 48

def verify_absolute(*paths)
  paths.each do |path|
    absolute = Pathname.new(path).absolute?
    raise "#{path} not absolute" if not absolute
  end
end