Module: GitBak::Misc

Defined in:
lib/gitbak/misc.rb

Overview

miscellaneous

Defined Under Namespace

Classes: SysError

Class Method Summary collapse

Class Method Details

.deepdup(obj) ⇒ Object

deep copy using Marshal



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# File 'lib/gitbak/misc.rb', line 31

def self.deepdup (obj)
  Marshal.load(Marshal.dump obj)
end

.die!(msg) ⇒ Object

print msg to stderr and exit



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# File 'lib/gitbak/misc.rb', line 36

def self.die! (msg)
  STDERR.puts msg
  exit 1
end

.exists?(path) ⇒ Boolean

does file/dir or symlink exists?

Returns:

  • (Boolean) 


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# File 'lib/gitbak/misc.rb', line 42

def self.exists? (path)
  File.exists?(path) or File.symlink?(path)
end

.prompt(prompt, hide = false) ⇒ Object

prompt for line; optionally hide input



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# File 'lib/gitbak/misc.rb', line 47

def self.prompt (prompt, hide = false)                      # {{{1
  STDOUT.print prompt
  STDOUT.flush

  if hide
    line = STDIN.noecho { |i| i.gets }
    STDOUT.puts
  else
    line = STDIN.gets
  end

  line and line.chomp
end

.sys(cmd, *args) ⇒ Object

execute command (unless noact); optionally verbose

See Also:



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# File 'lib/gitbak/misc.rb', line 70

def self.sys (cmd, *args)                                   # {{{1
  opts = Hash === args.last ? args.pop : {}

  puts "$ #{ ([cmd] + args).join ' ' }" \
    if opts[:verbose] or opts[:noact]

  if opts[:noact]
    puts '(not actually doing anything)'
  else
    sys_ cmd, *args
  end
end

.sys_(cmd, *args) ⇒ Object

execute command

Raises:

  • SysError on failure



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# File 'lib/gitbak/misc.rb', line 63

def self.sys_ (cmd, *args)
  system [cmd, cmd], *args or raise SysError,
    "failed to run command #{ ([cmd] + args) } (#$?)"
end