Class: Danger::RequestSources::GitHub

Inherits:
RequestSource show all
Includes:
Helpers::CommentsHelper
Defined in:
lib/danger/request_sources/github/github.rb

Constant Summary

Constants inherited from RequestSource

RequestSource::DANGER_REPO_NAME

Instance Attribute Summary collapse

Attributes inherited from RequestSource

#ci_source, #environment, #ignored_violations

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Helpers::CommentsHelper

#apply_template, #generate_comment, #generate_description, #generate_inline_comment_body, #generate_inline_markdown_body, #markdown_parser, #process_markdown, #random_compliment, #table

Methods included from Helpers::CommentsParsingHelper

#parse_comment, #parse_tables_from_comment, #table_kind_from_title, #violations_from_table

Methods inherited from RequestSource

available_request_sources, available_source_names_and_envs, inherited, source_name, #validates_as_ci?

Constructor Details

#initialize(ci_source, environment) ⇒ GitHub

Returns a new instance of GitHub.



26
27
28
29
30
31
32
33
 
# File 'lib/danger/request_sources/github/github.rb', line 26

def initialize(ci_source, environment)
  self.ci_source = ci_source
  self.environment = environment
  self.support_tokenless_auth = false
  self.dismiss_out_of_range_messages = false

  @token = @environment["DANGER_GITHUB_API_TOKEN"]
end

Instance Attribute Details

#dismiss_out_of_range_messages ⇒ Object

Returns the value of attribute dismiss_out_of_range_messages.



16
17
18
 
# File 'lib/danger/request_sources/github/github.rb', line 16

def dismiss_out_of_range_messages
  @dismiss_out_of_range_messages
end

#issue_json ⇒ Object

Returns the value of attribute issue_json.



16
17
18
 
# File 'lib/danger/request_sources/github/github.rb', line 16

def issue_json
  @issue_json
end

#pr_json ⇒ Object

Returns the value of attribute pr_json.



16
17
18
 
# File 'lib/danger/request_sources/github/github.rb', line 16

def pr_json
  @pr_json
end

#support_tokenless_auth ⇒ Object

Returns the value of attribute support_tokenless_auth.



16
17
18
 
# File 'lib/danger/request_sources/github/github.rb', line 16

def support_tokenless_auth
  @support_tokenless_auth
end

Class Method Details

.env_vars ⇒ Object 



18
19
20
 
# File 'lib/danger/request_sources/github/github.rb', line 18

def self.env_vars
  ["DANGER_GITHUB_API_TOKEN"]
end

.optional_env_vars ⇒ Object 



22
23
24
 
# File 'lib/danger/request_sources/github/github.rb', line 22

def self.optional_env_vars
  ["DANGER_GITHUB_HOST", "DANGER_GITHUB_API_BASE_URL"]
end

Instance Method Details

#api_url ⇒ Object

‘DANGER_GITHUB_API_HOST` is the old name kept for legacy reasons and backwards compatibility. `DANGER_GITHUB_API_BASE_URL` is the new correctly named variable.



50
51
52
53
54
55
56
 
# File 'lib/danger/request_sources/github/github.rb', line 50

def api_url
  @environment.fetch("DANGER_GITHUB_API_HOST") do
    @environment.fetch("DANGER_GITHUB_API_BASE_URL") do
      "https://api.github.com/".freeze
    end
  end
end

#client ⇒ Object 



58
59
60
61
62
63
64
 
# File 'lib/danger/request_sources/github/github.rb', line 58

def client
  raise "No API token given, please provide one using `DANGER_GITHUB_API_TOKEN`" if !@token && !support_tokenless_auth

  @client ||= begin
    Octokit::Client.new(access_token: @token, auto_paginate: true, api_endpoint: api_url)
  end
end

#delete_old_comments!(except: nil, danger_id: "danger") ⇒ Object

Get rid of the previously posted comment, to only have the latest one



227
228
229
230
231
232
233
 
# File 'lib/danger/request_sources/github/github.rb', line 227

def delete_old_comments!(except: nil, danger_id: "danger")
  issue_comments.each do |comment|
    next unless comment.generated_by_danger?(danger_id)
    next if comment.id == except
    client.delete_comment(ci_source.repo_slug, comment.id)
  end
end

#fetch_details ⇒ Object 



100
101
102
103
104
105
106
107
108
 
# File 'lib/danger/request_sources/github/github.rb', line 100

def fetch_details
  self.pr_json = client.pull_request(ci_source.repo_slug, ci_source.pull_request_id)
  if self.pr_json["message"] == "Moved Permanently"
    raise "Repo moved or renamed, make sure to update the git remote".red
  end

  fetch_issue_details(self.pr_json)
  self.ignored_violations = ignored_violations_from_pr
end

#fetch_issue_details(pr_json) ⇒ Object 



114
115
116
117
 
# File 'lib/danger/request_sources/github/github.rb', line 114

def fetch_issue_details(pr_json)
  href = pr_json["_links"]["issue"]["href"]
  self.issue_json = client.get(href)
end

#file_url(organisation: nil, repository: nil, branch: nil, path: nil) ⇒ String

Returns A URL to the specific file, ready to be downloaded.

Returns:

  • (String) —

    A URL to the specific file, ready to be downloaded



419
420
421
422
423
424
425
426
427
428
429
430
431
432
 
# File 'lib/danger/request_sources/github/github.rb', line 419

def file_url(organisation: nil, repository: nil, branch: nil, path: nil)
  organisation ||= self.organisation

  return @download_url unless @download_url.nil?
  begin
    # Retrieve the download URL (default branch on nil param)
    contents = client.contents("#{organisation}/#{repository}", path: path, ref: branch)
    @download_url = contents["download_url"]
  rescue Octokit::ClientError
    # Fallback to github.com
    branch ||= "master"
    @download_url = "https://raw.githubusercontent.com/#{organisation}/#{repository}/#{branch}/#{path}"
  end
end

#find_position_in_diff(diff_lines, message) ⇒ Object 



335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
 
# File 'lib/danger/request_sources/github/github.rb', line 335

def find_position_in_diff(diff_lines, message)
  range_header_regexp = /@@ -([0-9]+),([0-9]+) \+(?<start>[0-9]+)(,(?<end>[0-9]+))? @@.*/
  file_header_regexp = %r{^diff --git a/.*}

  pattern = "+++ b/" + message.file + "\n"
  file_start = diff_lines.index(pattern)

  return nil if file_start.nil?

  position = -1
  file_line = nil

  diff_lines.drop(file_start).each do |line|
    # If we found the start of another file diff, we went too far
    break if line.match file_header_regexp

    match = line.match range_header_regexp

    # file_line is set once we find the hunk the line is in
    # we need to count how many lines in new file we have
    # so we do it one by one ignoring the deleted lines
    if !file_line.nil? && !line.start_with?("-")
      if file_line == message.line
        file_line = nil if dismiss_out_of_range_messages && !line.start_with?("+")
        break
      end
      file_line += 1
    end

    # We need to count how many diff lines are between us and
    # the line we're looking for
    position += 1

    next unless match

    range_start = match[:start].to_i
    if match[:end]
      range_end = match[:end].to_i + range_start
    else
      range_end = range_start
    end

    # We are past the line position, just abort
    break if message.line.to_i < range_start
    next unless message.line.to_i >= range_start && message.line.to_i < range_end

    file_line = range_start
  end

  position unless file_line.nil?
end

#host ⇒ Object 



43
44
45
 
# File 'lib/danger/request_sources/github/github.rb', line 43

def host
  @host = @environment["DANGER_GITHUB_HOST"] || "github.com"
end

#ignored_violations_from_pr ⇒ Object 



110
111
112
 
# File 'lib/danger/request_sources/github/github.rb', line 110

def ignored_violations_from_pr
  GetIgnoredViolation.new(self.pr_json["body"]).call
end

#issue_comments ⇒ Object 



119
120
121
122
123
124
 
# File 'lib/danger/request_sources/github/github.rb', line 119

def issue_comments
  @comments ||= begin
    client.issue_comments(ci_source.repo_slug, ci_source.pull_request_id)
      .map { |comment| Comment.from_github(comment) }
  end
end

#markdown_link_to_message(message, hide_link) ⇒ Object 



400
401
402
403
404
405
406
407
408
 
# File 'lib/danger/request_sources/github/github.rb', line 400

def markdown_link_to_message(message, hide_link)
  url = "https://#{host}/#{ci_source.repo_slug}/blob/#{pr_json['head']['sha']}/#{message.file}#L#{message.line}"

  if hide_link
    "<span data-href=\"#{url}\"/>"
  else
    "[#{message.file}#L#{message.line}](#{url}) - "
  end
end

#messages_are_equivalent(m1, m2) ⇒ Object 



271
272
273
274
275
 
# File 'lib/danger/request_sources/github/github.rb', line 271

def messages_are_equivalent(m1, m2)
  blob_regexp = %r{blob/[0-9a-z]+/}
  m1.file == m2.file && m1.line == m2.line &&
    m1.message.sub(blob_regexp, "") == m2.message.sub(blob_regexp, "")
end

#organisation ⇒ String

Returns The organisation name, is nil if it can’t be detected.

Returns:

  • (String) —

    The organisation name, is nil if it can’t be detected



411
412
413
414
415
416
 
# File 'lib/danger/request_sources/github/github.rb', line 411

def organisation
  matched = self.issue_json["repository_url"].match(%r{repos\/(.*)\/})
  return matched[1] if matched && matched[1]
rescue
  nil
end

#parse_message_from_row(row) ⇒ Object

See the tests for examples of data coming in looks like



388
389
390
391
392
393
394
395
396
397
398
 
# File 'lib/danger/request_sources/github/github.rb', line 388

def parse_message_from_row(row)
  message_regexp = %r{(<(a |span data-)href="https://#{host}/#{ci_source.repo_slug}/blob/[0-9a-z]+/(?<file>[^#]+)#L(?<line>[0-9]+)"(>[^<]*</a> - |/>))?(?<message>.*?)}im
  match = message_regexp.match(row)

  if match[:line]
    line = match[:line].to_i
  else
    line = nil
  end
  Violation.new(row, true, match[:file], line)
end

#pr_diff ⇒ Object 



66
67
68
 
# File 'lib/danger/request_sources/github/github.rb', line 66

def pr_diff
  @pr_diff ||= client.pull_request(ci_source.repo_slug, ci_source.pull_request_id, accept: "application/vnd.github.v3.diff")
end

#review ⇒ Object 



70
71
72
73
74
75
76
77
78
79
80
81
82
83
 
# File 'lib/danger/request_sources/github/github.rb', line 70

def review
  return @review unless @review.nil?
  begin
    @review = client.pull_request_reviews(ci_source.repo_slug, ci_source.pull_request_id)
      .map { |review_json| Danger::RequestSources::GitHubSource::Review.new(client, ci_source, review_json) }
      .select(&:generated_by_danger?)
      .last
    @review ||= Danger::RequestSources::GitHubSource::Review.new(client, ci_source)
    @review
  rescue Octokit::NotFound
    @review = Danger::RequestSources::GitHubSource::ReviewUnsupported.new
    @review
  end
end

#scm ⇒ Object 



39
40
41
 
# File 'lib/danger/request_sources/github/github.rb', line 39

def scm
  @scm ||= GitRepo.new
end

#setup_danger_branches ⇒ Object 



85
86
87
88
89
90
91
92
93
94
95
96
97
98
 
# File 'lib/danger/request_sources/github/github.rb', line 85

def setup_danger_branches
  # we can use a github specific feature here:
  base_commit = self.pr_json["base"]["sha"]
  head_commit = self.pr_json["head"]["sha"]

  # Next, we want to ensure that we have a version of the current branch at a known location
  scm.ensure_commitish_exists! base_commit
  self.scm.exec "branch #{EnvironmentManager.danger_base_branch} #{base_commit}"

  # OK, so we want to ensure that we have a known head branch, this will always represent
  # the head of the PR ( e.g. the most recent commit that will be merged. )
  scm.ensure_commitish_exists! head_commit
  self.scm.exec "branch #{EnvironmentManager.danger_head_branch} #{head_commit}"
end

#submit_inline_comments!(warnings: [], errors: [], messages: [], markdowns: [], previous_violations: [], danger_id: "danger") ⇒ Object 



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
 
# File 'lib/danger/request_sources/github/github.rb', line 235

def submit_inline_comments!(warnings: [], errors: [], messages: [], markdowns: [], previous_violations: [], danger_id: "danger")
  # Avoid doing any fetchs if there's no inline comments
  return if (warnings + errors + messages + markdowns).select(&:inline?).empty?

  diff_lines = self.pr_diff.lines
  pr_comments = client.pull_request_comments(ci_source.repo_slug, ci_source.pull_request_id)
  danger_comments = pr_comments.select { |comment| Comment.from_github(comment).generated_by_danger?(danger_id) }
  non_danger_comments = pr_comments - danger_comments

  submit_inline_comments_for_kind!("warning", warnings, diff_lines, danger_comments, previous_violations["warning"], danger_id: danger_id)
  submit_inline_comments_for_kind!("no_entry_sign", errors, diff_lines, danger_comments, previous_violations["error"], danger_id: danger_id)
  submit_inline_comments_for_kind!("book", messages, diff_lines, danger_comments, previous_violations["message"], danger_id: danger_id)
  submit_inline_comments_for_kind!(nil, markdowns, diff_lines, danger_comments, [], danger_id: danger_id)

  # submit removes from the array all comments that are still in force
  # so we strike out all remaining ones
  danger_comments.each do |comment|
    violation = violations_from_table(comment["body"]).first
    if !violation.nil? && violation.sticky
      body = generate_inline_comment_body("white_check_mark", violation, danger_id: danger_id, resolved: true, template: "github")
      client.update_pull_request_comment(ci_source.repo_slug, comment["id"], body)
    else
      # We remove non-sticky violations that have no replies
      # Since there's no direct concept of a reply in GH, we simply consider
      # the existance of non-danger comments in that line as replies
      replies = non_danger_comments.select do |potential|
        potential["path"] == comment["path"] &&
          potential["position"] == comment["position"] &&
          potential["commit_id"] == comment["commit_id"]
      end

      client.delete_pull_request_comment(ci_source.repo_slug, comment["id"]) if replies.empty?
    end
  end
end

#submit_inline_comments_for_kind!(emoji, messages, diff_lines, danger_comments, previous_violations, danger_id: "danger") ⇒ Object 



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
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
 
# File 'lib/danger/request_sources/github/github.rb', line 277

def submit_inline_comments_for_kind!(emoji, messages, diff_lines, danger_comments, previous_violations, danger_id: "danger")
  head_ref = pr_json["head"]["sha"]
  previous_violations ||= []
  is_markdown_content = emoji.nil?

  submit_inline = proc do |m|
    next false unless m.file && m.line

    position = find_position_in_diff diff_lines, m

    # Keep the change if it's line is not in the diff and not in dismiss mode
    next self.dismiss_out_of_range_messages if position.nil?

    # Once we know we're gonna submit it, we format it
    if is_markdown_content
      body = generate_inline_markdown_body(m, danger_id: danger_id, template: "github")
    else
      # Hide the inline link behind a span
      m = process_markdown(m, true)
      body = generate_inline_comment_body(emoji, m, danger_id: danger_id, template: "github")
      # A comment might be in previous_violations because only now it's part of the unified diff
      # We remove from the array since it won't have a place in the table anymore
      previous_violations.reject! { |v| messages_are_equivalent(v, m) }
    end

    matching_comments = danger_comments.select do |comment_data|
      if comment_data["path"] == m.file && comment_data["commit_id"] == head_ref && comment_data["position"] == position
        # Parse it to avoid problems with strikethrough
        violation = violations_from_table(comment_data["body"]).first
        if violation
          messages_are_equivalent(violation, m)
        else
          comment_data["body"] == body
        end
      else
        false
      end
    end

    if matching_comments.empty?
      client.create_pull_request_comment(ci_source.repo_slug, ci_source.pull_request_id,
                                         body, head_ref, m.file, position)
    else
      # Remove the surviving comment so we don't strike it out
      danger_comments.reject! { |c| matching_comments.include? c }

      # Update the comment to remove the strikethrough if present
      comment = matching_comments.first
      client.update_pull_request_comment(ci_source.repo_slug, comment["id"], body)
    end

    # Remove this element from the array
    next true
  end

  messages.reject!(&submit_inline)
end

#submit_pull_request_status!(warnings: [], errors: [], details_url: [], danger_id: "danger") ⇒ Object 



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
 
# File 'lib/danger/request_sources/github/github.rb', line 192

def submit_pull_request_status!(warnings: [], errors: [], details_url: [], danger_id: "danger")
  status = (errors.count.zero? ? "success" : "failure")
  message = generate_description(warnings: warnings, errors: errors)
  latest_pr_commit_ref = self.pr_json["head"]["sha"]

  if latest_pr_commit_ref.empty? || latest_pr_commit_ref.nil?
    raise "Couldn't find a commit to update its status".red
  end

  begin
    client.create_status(ci_source.repo_slug, latest_pr_commit_ref, status, {
      description: message,
      context: "danger/#{danger_id}",
      target_url: details_url
    })
  rescue
    # This usually means the user has no commit access to this repo
    # That's always the case for open source projects where you can only
    # use a read-only GitHub account
    if errors.count > 0
      # We need to fail the actual build here
      is_private = pr_json["base"]["repo"]["private"]
      if is_private
        abort("\nDanger has failed this build. \nFound #{'error'.danger_pluralize(errors.count)} and I don't have write access to the PR to set a PR status.")
      else
        abort("\nDanger has failed this build. \nFound #{'error'.danger_pluralize(errors.count)}.")
      end
    else
      puts message
      puts "\nDanger does not have write access to the PR to set a PR status.".yellow
    end
  end
end

#update_pull_request!(warnings: [], errors: [], messages: [], markdowns: [], danger_id: "danger", new_comment: false) ⇒ Object

Sending data to GitHub



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
 
# File 'lib/danger/request_sources/github/github.rb', line 127

def update_pull_request!(warnings: [], errors: [], messages: [], markdowns: [], danger_id: "danger", new_comment: false)
  comment_result = {}
  editable_comments = issue_comments.select { |comment| comment.generated_by_danger?(danger_id) }
  last_comment = editable_comments.last
  should_create_new_comment = new_comment || last_comment.nil?

  if should_create_new_comment
    previous_violations = {}
  else
    previous_violations = parse_comment(last_comment.body)
  end

  cmp = proc do |a, b|
    next -1 unless a.file
    next 1 unless b.file

    next a.line <=> b.line if a.file == b.file
    next a.file <=> b.file
  end

  # Sort to group inline comments by file
  # We copy because we need to mutate this arrays for inlines
  comment_warnings = warnings.sort(&cmp)
  comment_errors = errors.sort(&cmp)
  comment_messages = messages.sort(&cmp)
  comment_markdowns = markdowns.sort(&cmp)

  submit_inline_comments!(warnings: comment_warnings,
                            errors: comment_errors,
                          messages: comment_messages,
                          markdowns: comment_markdowns,
                previous_violations: previous_violations,
                          danger_id: danger_id)

  main_violations = comment_warnings + comment_errors + comment_messages + comment_markdowns
  if previous_violations.empty? && main_violations.empty?
    # Just remove the comment, if there's nothing to say.
    delete_old_comments!(danger_id: danger_id)
  end

  # If there are still violations to show
  unless main_violations.empty?
    body = generate_comment(warnings: comment_warnings,
                              errors: comment_errors,
                            messages: comment_messages,
                            markdowns: comment_markdowns,
                  previous_violations: previous_violations,
                            danger_id: danger_id,
                            template: "github")

    if should_create_new_comment
      comment_result = client.add_comment(ci_source.repo_slug, ci_source.pull_request_id, body)
    else
      comment_result = client.update_comment(ci_source.repo_slug, last_comment.id, body)
    end
  end

  # Now, set the pull request status.
  # Note: this can terminate the entire process.
  submit_pull_request_status!(warnings: warnings,
                                errors: errors,
                           details_url: comment_result["html_url"],
                             danger_id: danger_id)
end

#validates_as_api_source? ⇒ Boolean

Returns:

  • (Boolean) 


35
36
37
 
# File 'lib/danger/request_sources/github/github.rb', line 35

def validates_as_api_source?
  (@token && !@token.empty?) || self.environment["DANGER_USE_LOCAL_GIT"]
end