Class: Dit

Inherits:
Object
  • Object
show all
Defined in:
lib/dit.rb

Overview

This is the class where all the dit work is done. The thor class is basically a very thin layer on top of this that just calls its methods directly. This is because the hooks are not running through the Thor object, but also referencing these methods.

Class Method Summary collapse

Class Method Details

.detect_hook(hook) ⇒ Object 



90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
 
# File 'lib/dit.rb', line 90

def self.detect_hook(hook)
  return [false, false] unless File.exist?(hook)

  cannot_hook, append_to_hook = false

  if `cat #{hook}`.include?('./.git/hooks/dit')
    puts 'Dit hook already installed.'
    cannot_hook = true
  elsif `cat #{hook}`.include?('#!/usr/bin/env bash')
    puts "You have #{hook} hooks already that use bash, so we'll " +
      'append ourselves to the file.'
    append_to_hook = true
  else
    puts "You have #{hook} hooks that use some foreign language, " +
      "so we won't interfere, but we can't hook in there."
    cannot_hook = true
  end

  [append_to_hook, cannot_hook]
end

.exit_if_windows ⇒ Object 



28
29
30
31
32
33
34
 
# File 'lib/dit.rb', line 28

def self.exit_if_windows
  if OS.windows?
    puts 'This is a windows system, and dit does not support windows.'
    puts 'See vulpino/dit issue #1 if you have a potential solution.'
    exit 1
  end
end

.hook ⇒ Object 



44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/dit.rb', line 44

def self.hook
  Dir.chdir(File.join('.git', 'hooks')) do
    # The following check for the existence of post-commit or post-merge hooks
    # and will not interfere with them if they exist and do not use bash.
    append_to_post_commit, cannot_post_commit = detect_hook 'post-commit'
    append_to_post_merge, cannot_post_merge = detect_hook 'post-merge'

    write_hook('post-commit', append_to_post_commit) unless cannot_post_commit
    write_hook('post-merge', append_to_post_merge) unless cannot_post_merge

    make_dit
    make_ruby_enforcer

    # Make sure they're executable
    FileUtils.chmod '+x', %w(post-commit post-merge dit force-ruby)
  end
end

.init ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
25
26
 
# File 'lib/dit.rb', line 13

def self.init
  exit_if_windows

  if Dir.exist?('.git')
    symlink_all if prompt_for_symlink_all
  else
    Git.init(Dir.getwd)
    puts "Initialized empty Git repository in #{File.join(Dir.getwd, '.git')}"
  end

  hook

  puts 'Dit was successfully hooked into .git/hooks.'
end

.make_dit ⇒ Object 



118
119
120
121
122
123
124
 
# File 'lib/dit.rb', line 118

def self.make_dit
  File.open('dit', 'a') do |f|
    f.write "#!/usr/bin/env ./.git/hooks/force-ruby\n"
    f.write "require 'dit'\n"
    f.write "Dit.symlink_unlinked\n"
  end
end

.make_ruby_enforcer ⇒ Object 



126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
 
# File 'lib/dit.rb', line 126

def self.make_ruby_enforcer
  # The following lines are because git hooks do this weird thing
  # where they prepend /usr/bin to the path and a bunch of other stuff
  # meaning git hooks will use /usr/bin/ruby instead of any ruby
  # from rbenv or rvm or chruby, so we make a script forcing the hook
  # to use our ruby
  ruby_path = `which ruby`
  if ruby_path != '/usr/bin/ruby'
    ruby_folder = File.dirname(ruby_path)
    File.open('force-ruby', 'a') do |f|
      f.write "#!/usr/bin/env bash\n"
      f.write "set -e\n"
      if ENV['RBENV_ROOT']
        # Use Rbenv's shims instead of directly going to ruby bin
        # By the way, if anyone has particular PATHs I should use for
        # RVM or chruby, please let me know!
        f.write "PATH=#{File.join(ENV['RBENV_ROOT'], 'shims')}:$PATH\n"
      else
        f.write "PATH=#{ruby_folder}:$PATH\n"
      end
      f.write "exec ruby \"$@\"\n"
    end
  else
    File.open('force-ruby', 'a') do |f|
      f.write "#!/usr/bin/env bash\n"
      f.write "exec ruby \"$@\"\n"
    end
  end
end

.prompt_for_symlink_all ⇒ Object 



36
37
38
39
40
41
42
 
# File 'lib/dit.rb', line 36

def self.prompt_for_symlink_all
  puts 'Dit has detected an existing git repo, and will initialize it to ' +
    'populate your ~ directory with symlinks.'
  puts 'Please confirm this by typing y, or anything else to cancel.'
  response = STDIN.gets.chomp.upcase
  response == 'Y'
end

.repo ⇒ Object 



80
81
82
 
# File 'lib/dit.rb', line 80

def self.repo
  Git.open(Dir.getwd)
end

.symlink(a, b) ⇒ Object 



84
85
86
87
88
 
# File 'lib/dit.rb', line 84

def self.symlink(a, b)
  File.symlink(a, b)
rescue
  puts "Failed to symlink #{a} to #{b}"
end

.symlink_all ⇒ Object 



75
76
77
78
 
# File 'lib/dit.rb', line 75

def self.symlink_all
  current_branch = `git rev-parse --abbrev-ref HEAD`.chomp
  symlink_list `git ls-tree -r #{current_branch} --name-only`.split("\n")
end

.symlink_list(list) ⇒ Object 



62
63
64
65
66
67
68
69
 
# File 'lib/dit.rb', line 62

def self.symlink_list(list)
  list.each do |f|
    f.strip!
    wd_f = File.absolute_path f
    home_f = File.absolute_path(f).gsub(Dir.getwd, Dir.home)
    symlink wd_f, home_f
  end
end

.symlink_unlinked ⇒ Object 



71
72
73
 
# File 'lib/dit.rb', line 71

def self.symlink_unlinked
  symlink_list `git show --pretty="format:" --name-only HEAD`.split("\n")
end

.version ⇒ Object 



156
157
158
 
# File 'lib/dit.rb', line 156

def self.version
  '0.2.3'
end

.write_hook(hook_file, do_append) ⇒ Object 



111
112
113
114
115
116
 
# File 'lib/dit.rb', line 111

def self.write_hook(hook_file, do_append)
  File.open(hook_file, 'a') do |f|
    f.write "#!/usr/bin/env bash\n" unless do_append
    f.write "( exec ./.git/hooks/dit )\n"
  end
end