summaryrefslogtreecommitdiff
path: root/lib/puppet/provider/vcsrepo/git.rb
blob: 9254243689dd27696b1ef5cc24c14bce9e6c331b (plain)
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
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
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
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
require File.join(File.dirname(__FILE__), '..', 'vcsrepo')

Puppet::Type.type(:vcsrepo).provide(:git, :parent => Puppet::Provider::Vcsrepo) do
  desc "Supports Git repositories"

  ##TODO modify the commands below so that the su - is included
  optional_commands :git => 'git',
                    :su => 'su'
  has_features :bare_repositories, :reference_tracking, :ssh_identity, :multiple_remotes, :user

  def create
    if !@resource.value(:source)
      init_repository(@resource.value(:path))
    else
      clone_repository(@resource.value(:source), @resource.value(:path))
      if @resource.value(:revision)
        if @resource.value(:ensure) == :bare
          notice "Ignoring revision for bare repository"
        else
          checkout
        end
      end
      if @resource.value(:ensure) != :bare
        update_submodules
      end
    end
    update_owner_and_excludes
  end

  def destroy
    FileUtils.rm_rf(@resource.value(:path))
  end

  def latest?
    at_path do
      return self.revision == self.latest
    end
  end

  def latest
    branch = on_branch?
    if branch == 'master'
      return get_revision("#{@resource.value(:remote)}/HEAD")
    elsif branch == '(no branch)'
      return get_revision('HEAD')
    else
      return get_revision("#{@resource.value(:remote)}/%s" % branch)
    end
  end

  def revision
    update_references
    current = at_path { git_with_identity('rev-parse', 'HEAD').chomp }
    return current unless @resource.value(:revision)

    if tag_revision?(@resource.value(:revision))
      canonical = at_path { git_with_identity('show', @resource.value(:revision)).scan(/commit (.*)/).to_s }
    else
      canonical = at_path { git_with_identity('rev-parse', @resource.value(:revision)).chomp }
    end

    if current == canonical
      @resource.value(:revision)
    else
      current
    end
  end

  def revision=(desired)
    checkout(desired)
    if local_branch_revision?(desired)
      # reset instead of pull to avoid merge conflicts. assuming remote is
      # authoritative.
      # might be worthwhile to have an allow_local_changes param to decide
      # whether to reset or pull when we're ensuring latest.
      at_path { git_with_identity('reset', '--hard', "#{@resource.value(:remote)}/#{desired}") }
    end
    if @resource.value(:ensure) != :bare
      update_submodules
    end
    update_owner_and_excludes
  end

  def bare_exists?
    bare_git_config_exists? && !working_copy_exists?
  end

  def working_copy_exists?
    File.directory?(File.join(@resource.value(:path), '.git'))
  end

  def exists?
    working_copy_exists? || bare_exists?
  end

  def update_references
    at_path do
      git_with_identity('fetch', @resource.value(:remote))
      git_with_identity('fetch', '--tags', @resource.value(:remote))
      update_owner_and_excludes
    end
  end

  private

  def bare_git_config_exists?
    File.exist?(File.join(@resource.value(:path), 'config'))
  end

  def clone_repository(source, path)
    check_force
    args = ['clone']
    if @resource.value(:ensure) == :bare
      args << '--bare'
    end
    if !File.exist?(File.join(@resource.value(:path), '.git'))
      args.push(source, path)
      git_with_identity(*args)
    else
      notice "Repo has already been cloned"
    end
  end

  def check_force
    if path_exists?
      if @resource.value(:force)
        notice "Removing %s to replace with vcsrepo." % @resource.value(:path)
        destroy
      else
        raise Puppet::Error, "Could not create repository (non-repository at path)"
      end
    end
  end

  def init_repository(path)
    check_force
    if @resource.value(:ensure) == :bare && working_copy_exists?
      convert_working_copy_to_bare
    elsif @resource.value(:ensure) == :present && bare_exists?
      convert_bare_to_working_copy
    else
      # normal init
      FileUtils.mkdir(@resource.value(:path))
      args = ['init']
      if @resource.value(:ensure) == :bare
        args << '--bare'
      end
      at_path do
        git_with_identity(*args)
      end
    end
  end

  # Convert working copy to bare
  #
  # Moves:
  #   <path>/.git
  # to:
  #   <path>/
  def convert_working_copy_to_bare
    notice "Converting working copy repository to bare repository"
    FileUtils.mv(File.join(@resource.value(:path), '.git'), tempdir)
    FileUtils.rm_rf(@resource.value(:path))
    FileUtils.mv(tempdir, @resource.value(:path))
  end

  # Convert bare to working copy
  #
  # Moves:
  #   <path>/
  # to:
  #   <path>/.git
  def convert_bare_to_working_copy
    notice "Converting bare repository to working copy repository"
    FileUtils.mv(@resource.value(:path), tempdir)
    FileUtils.mkdir(@resource.value(:path))
    FileUtils.mv(tempdir, File.join(@resource.value(:path), '.git'))
    if commits_in?(File.join(@resource.value(:path), '.git'))
      reset('HEAD')
      git_with_identity('checkout', '-f')
      update_owner_and_excludes
    end
  end

  def commits_in?(dot_git)
    Dir.glob(File.join(dot_git, 'objects/info/*'), File::FNM_DOTMATCH) do |e|
      return true unless %w(. ..).include?(File::basename(e))
    end
    false
  end

  def checkout(revision = @resource.value(:revision))
    if !local_branch_revision? && remote_branch_revision?
      at_path { git_with_identity('checkout', '-b', revision, '--track', "#{@resource.value(:remote)}/#{revision}") }
    else
      at_path { git_with_identity('checkout', '--force', revision) }
    end
  end

  def reset(desired)
    at_path do
      git_with_identity('reset', '--hard', desired)
    end
  end

  def update_submodules
    at_path do
      git_with_identity('submodule', 'init')
      git_with_identity('submodule', 'update')
      git_with_identity('submodule', 'foreach', 'git', 'submodule', 'init')
      git_with_identity('submodule', 'foreach', 'git', 'submodule', 'update')
    end
  end

  def remote_branch_revision?(revision = @resource.value(:revision))
    # git < 1.6 returns '#{@resource.value(:remote)}/#{revision}'
    # git 1.6+ returns 'remotes/#{@resource.value(:remote)}/#{revision}'
    branch = at_path { branches.grep /(remotes\/)?#{@resource.value(:remote)}\/#{revision}/ }
    if branch.length > 0
      return branch
    end
  end

  def local_branch_revision?(revision = @resource.value(:revision))
    at_path { branches.include?(revision) }
  end

  def tag_revision?(revision = @resource.value(:revision))
    at_path { tags.include?(revision) }
  end

  def branches
    at_path { git_with_identity('branch', '-a') }.gsub('*', ' ').split(/\n/).map { |line| line.strip }
  end

  def on_branch?
    at_path { git_with_identity('branch', '-a') }.split(/\n/).grep(/\*/).first.to_s.gsub('*', '').strip
  end

  def tags
    at_path { git_with_identity('tag', '-l') }.split(/\n/).map { |line| line.strip }
  end

  def set_excludes
    at_path { open('.git/info/exclude', 'w') { |f| @resource.value(:excludes).each { |ex| f.write(ex + "\n") }}}
  end

  def get_revision(rev)
    if !working_copy_exists?
      create
    end
    at_path do
      git_with_identity('fetch', @resource.value(:remote))
      git_with_identity('fetch', '--tags', @resource.value(:remote))
    end
    current = at_path { git_with_identity('rev-parse', rev).strip }
    if @resource.value(:revision)
      if local_branch_revision?
        canonical = at_path { git_with_identity('rev-parse', @resource.value(:revision)).strip }
      elsif remote_branch_revision?
        canonical = at_path { git_with_identity('rev-parse', "#{@resource.value(:remote)}/" + @resource.value(:revision)).strip }
      end
      current = @resource.value(:revision) if current == canonical
    end
    update_owner_and_excludes
    return current
  end

  def update_owner_and_excludes
    if @resource.value(:owner) or @resource.value(:group)
      set_ownership
    end
    if @resource.value(:excludes)
      set_excludes
    end
  end

  def git_with_identity(*args)
    if @resource.value(:identity)
      Tempfile.open('git-helper') do |f|
        f.puts '#!/bin/sh'
        f.puts "exec ssh -oStrictHostKeyChecking=no -oPasswordAuthentication=no -oKbdInteractiveAuthentication=no -oChallengeResponseAuthentication=no -i #{@resource.value(:identity)} $*"
        f.close

        FileUtils.chmod(0755, f.path)
        env_save = ENV['GIT_SSH']
        ENV['GIT_SSH'] = f.path

        ret = git(*args)

        ENV['GIT_SSH'] = env_save

        return ret
      end
    elsif @resource.value(:user)
      su(@resource.value(:user), '-c', "git #{args.join(' ')}" )
    else
      git(*args)
    end
  end
end