Module: Ergo::ShellUtils

Defined in:
lib/ergo/shellutils.rb

Overview

File system utility methods.

Instance Method Summary collapse

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(s, *a, &b) ⇒ Object

If FileUtils responds to a missing method, then call it.



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# File 'lib/ergo/shellutils.rb', line 66

def method_missing(s, *a, &b)
  if FileUtils.respond_to?(s)
    if $DRYRUN
      FileUtils::DryRun.__send__(s, *a, &b)
    else
      FileUtils::Verbose.__send__(s, *a, &b)
    end
  else
    super(s, *a, &b)
  end
end

Instance Method Details

#directory?(path) ⇒ Boolean

Returns:



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# File 'lib/ergo/shellutils.rb', line 21

def directory?(path)
  File.directory?(path)
end

#sh(*args) ⇒ Object

Shell out via system call.

Parameters:

  • args —

    Argument vector. [Array]

Returns:

  • success of shell invocation.



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# File 'lib/ergo/shellutils.rb', line 14

def sh(*args)
  env = (Hash === args.last ? args.pop : {})
  puts args.join(' ')
  system(env, *args)
end

#sync(src, dst, options = {}) ⇒ Object

TODO:

Augment FileUtils instead.

TODO:

Not every action needs to be verbose.

Synchronize a destination directory with a source directory.



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# File 'lib/ergo/shellutils.rb', line 31

def sync(src, dst, options={})
  src_files = Dir[File.join(src, '**', '*')].map{ |f| f.sub(src+'/', '') }
  dst_files = Dir[File.join(dst, '**', '*')].map{ |f| f.sub(dst+'/', '') }

  removal = dst_files - src_files

  rm_dirs, rm_files = [], []
  removal.each do |f|
    path = File.join(dst, f)
    if File.directory?(path)
      rm_dirs << path
    else
      rm_files << path
    end
  end

  rm_files.each { |f| rm(f) }
  rm_dirs.each  { |d| rmdir(d) }

  src_files.each do |f|
    src_path = File.join(src, f)
    dst_path = File.join(dst, f)
    if File.directory?(src_path)
      mkdir_p(dst_path)
    else
      parent = File.dirname(dst_path) 
      mkdir_p(parent) unless File.directory?(parent)
      install(src_path, dst_path)
    end
  end
end