1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
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
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
|
# # Helpers: Local helpers
# You don't need to invoke these helpers, they're already invoked automatically.
module Mina
module LocalHelpers
# ### local
# Executes a command.
#
# Returns nothing usually, but if `{ return: true }` is given, returns the
# STDOUT output.
#
# `options` is a hash of options:
#
# - `:pretty` - Prettify the output if true.
# - `:return` - If set to true, returns the output.
#
# Example
#
# local("ls", return: true)
def local(cmd, options = {})
script = cmd.join("\n") if cmd.is_a?(Array)
if options[:return] == true
`#{script}`
elsif simulate_mode?
Local.simulate(script)
else
result = Local.invoke(script, self)
Local.ensure_successful result, self
end
end
# ## Private methods
# `local` delegates to these.
module Local
extend self
# ### Local.simulate
# __Internal:__ Prints command.
def simulate(cmd)
str = "Executing the following:"
puts "#!/usr/bin/env bash"
puts "# #{str}"
puts "#"
puts cmd
0
end
# ### Local.invoke
# __Internal:__ Initiates an SSH session with script `script` with given
# `term_mode`. Called by `local`.
def invoke(script, this)
# Ruby 1.8.7 doesn't let you have empty symbols
term_mode = :"#{this.settings.term_mode}" if this.settings.term_mode
code = "#{script}"
# Certain environments can't do :pretty mode.
term_mode = :exec if term_mode == :pretty && !pretty_supported?
case term_mode
when :pretty
require 'shellwords'
code = Shellwords.escape(code)
this.pretty_system(code)
when :exec
Kernel.exec code
else
Kernel.system code
$?.exitstatus
end
end
# TODO: Move to concern
def pretty_supported?
# open4 is not supported under Windows.
# https://github.com/nadarei/mina/issues/58
require 'rbconfig'
! (RbConfig::CONFIG['host_os'] =~ /mswin|mingw/)
end
# ### Local.ensure_successful
# __Internal:__ Halts the execution if the given result code is not
# successful (non-zero).
def ensure_successful(result, this)
this.die result if result.is_a?(Fixnum) && result > 0
result
end
end
end
end
|
