Module: Pindo::Executable

Included in:
Command::Deploy::Resign, Command::Utils::Icon, Githelper
Defined in:
lib/pindo/base/executable.rb

Overview

Module which provides support for running executables.

In a class it can be used as:

extend Executable
executable :git

This will create two methods ‘git` and `git!` both accept a command but the later will raise on non successful executions. The methods return the output of the command.

Defined Under Namespace

Classes: Indenter

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.capture_command(executable, command, capture: :merge) ⇒ (String, Process::Status)

Runs the given command, capturing the desired output.

Parameters:

  • bin (String) —

    The binary to use.

  • command (Array<#to_s>) —

    The command to send to the binary.

  • capture (Symbol) (defaults to: :merge) —

    Whether it should raise if the command fails.

Returns:

  • ((String, Process::Status)) —

    The desired captured output from the command, and the status from running the command.

Raises:

  • If the executable could not be located.



134
135
136
137
138
139
140
141
142
143
144
145
146
 
# File 'lib/pindo/base/executable.rb', line 134

def self.capture_command(executable, command, capture: :merge)
  bin = which!(executable)

  require 'open3'
  command = command.map(&:to_s)
  case capture
  when :merge then Open3.capture2e(bin, *command)
  when :both then Open3.capture3(bin, *command)
  when :out then Open3.capture3(bin, *command).values_at(0, -1)
  when :err then Open3.capture3(bin, *command).drop(1)
  when :none then Open3.capture3(bin, *command).last
  end
end

.execute_command(executable, command, raise_on_failure = true) ⇒ String

Executes the given command displaying it if in verbose mode.

Parameters:

  • executable (String) —

    The binary to use.

  • command (Array<#to_s>) —

    The command to send to the binary.

  • raise_on_failure (Bool) (defaults to: true) —

    Whether it should raise if the command fails.

Returns:

  • (String) —

    the output of the command (STDOUT and STDERR).

Raises:

  • If the executable could not be located.

  • If the command fails and the ‘raise_on_failure` is set to true.



48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
 
# File 'lib/pindo/base/executable.rb', line 48

def self.execute_command(executable, command, raise_on_failure = true)
  bin = which!(executable)

  command = command.map(&:to_s)
  full_command = "#{bin} #{command.join(' ')}"

  
  # if Config.instance.verbose?
    # puts "$ #{full_command}"
    # stdout = Indenter.new(STDOUT)
    # stderr = Indenter.new(STDERR)
  # else
    stdout = Indenter.new
    stderr = Indenter.new
  # end


  status = popen3(bin, command, stdout, stderr)
  stdout = stdout.join
  stderr = stderr.join
  output = stdout + stderr
  unless status.success?
    if raise_on_failure
      raise  Informative, "#{full_command}\n\n#{output}"
    else
      puts "[!] Failed: #{full_command}"
    end
  end

  output
end

.which(program) ⇒ String, Nil

Returns the absolute path to the binary with the given name on the current ‘PATH`, or `nil` if none is found.

Parameters:

  • program (String) —

    The name of the program being searched for.

Returns:

  • (String, Nil) —

    The absolute path to the given program, or ‘nil` if it wasn’t found in the current ‘PATH`.



89
90
91
92
93
94
95
96
97
98
99
100
101
 
# File 'lib/pindo/base/executable.rb', line 89

def self.which(program)
  program = program.to_s
  paths = ENV.fetch('PATH') { '' }.split(File::PATH_SEPARATOR)
  paths.unshift('./')
  paths.uniq!
  paths.each do |path|
    bin = File.expand_path(program, path)
    if File.file?(bin) && File.executable?(bin)
      return bin
    end
  end
  nil
end

.which!(program) ⇒ String

Returns the absolute path to the binary with the given name on the current ‘PATH`, or raises if none is found.

Parameters:

  • program (String) —

    The name of the program being searched for.

Returns:

  • (String) —

    The absolute path to the given program.



111
112
113
114
115
 
# File 'lib/pindo/base/executable.rb', line 111

def self.which!(program)
  which(program).tap do |bin|
    raise Informative, "Unable to locate the executable `#{program}`" unless bin
  end
end

Instance Method Details

#executable(name) ⇒ void

This method returns an undefined value.

Creates the methods for the executable with the given name.

Parameters:

  • name (Symbol) —

    the name of the executable.



21
22
23
24
25
26
27
28
29
 
# File 'lib/pindo/base/executable.rb', line 21

def executable(name)
  define_method(name) do |*command|
    Executable.execute_command(name, Array(command).flatten, false)
  end

  define_method(name.to_s + '!') do |*command|
    Executable.execute_command(name, Array(command).flatten, true)
  end
end