Class: StudFinder::TemporalCoupling

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

Defined Under Namespace

Classes: Result

Constant Summary collapse

SHA_PATTERN = 
/\A[0-9a-f]{40}\z/

Instance Method Summary collapse

Constructor Details

#initialize(repo_path:, files:, days:, min_co_changes: 5, coupling_threshold: 0.30) ⇒ TemporalCoupling

Returns a new instance of TemporalCoupling.



11
12
13
14
15
16
17
 
# File 'lib/stud_finder/temporal_coupling.rb', line 11

def initialize(repo_path:, files:, days:, min_co_changes: 5, coupling_threshold: 0.30)
  @repo_path = File.expand_path(repo_path)
  @file_set = files.to_h { |f| [f, true] }
  @days = days
  @min_co_changes = min_co_changes
  @coupling_threshold = coupling_threshold
end

Instance Method Details

#call ⇒ Object 



19
20
21
22
23
24
25
26
27
28
29
 
# File 'lib/stud_finder/temporal_coupling.rb', line 19

def call
  stdout, _err, status = git_log
  return Result.new(pairs: {}, warnings: ['git_error']) unless status.success?

  commits = parse_commits(stdout)
  co_matrix = build_co_change_matrix(commits)
  own_changes = build_own_changes(commits)
  Result.new(pairs: build_pairs(co_matrix, own_changes), warnings: [])
rescue Errno::ENOENT
  Result.new(pairs: {}, warnings: ['git_not_found'])
end