Class: Datadog::CI::Git::Diff

Inherits:
Object
  • Object
show all
Defined in:
lib/datadog/ci/git/diff.rb

Constant Summary collapse

FILE_CHANGE_REGEX = 
/^diff --git a\/(?<file>.+?) b\//.freeze
LINES_CHANGE_REGEX = 
/^@@ -\d+(?:,\d+)? \+(?<start>\d+)(?:,(?<count>\d+))? @@/.freeze

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(changed_files: {}) ⇒ Diff

Returns a new instance of Diff.



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# File 'lib/datadog/ci/git/diff.rb', line 13

def initialize(changed_files: {})
  @changed_files = changed_files # Hash of file_path => ChangedLines
end

Class Method Details

.parse_diff_output(output) ⇒ Object 



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# File 'lib/datadog/ci/git/diff.rb', line 45

def self.parse_diff_output(output)
  return new if output.nil? || output.empty?

  changed_files = {}
  current_file = nil

  output.each_line do |line|
    # Match lines like: diff --git a/foo/bar.rb b/foo/bar.rb
    # This captures git changes on file level
    match = FILE_CHANGE_REGEX.match(line)
    if match && match[:file]
      # this path here is already relative from the git root
      changed_file = match[:file]

      unless changed_file.nil? || changed_file.empty?
        current_file = changed_file
        changed_files[current_file] ||= ChangedLines.new
      end

      Datadog.logger.debug { "matched changed_file: #{changed_file} from git diff line: #{line}" }

      next
    end

    # Match lines like: @@ -1,2 +3,4 @@
    match = LINES_CHANGE_REGEX.match(line)
    if match && match[:start] && current_file
      start_line = match[:start].to_i

      line_count = 1 # Default to 1 line if count not specified
      line_count = match[:count].to_i if match[:count]

      end_line = start_line + line_count - 1

      changed_files[current_file].add_interval(start_line, end_line)

      Datadog.logger.debug { "Added interval [#{start_line}, #{end_line}] for file: #{current_file}" }
    end
  end

  new(changed_files: changed_files)
end

Instance Method Details

#empty? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/datadog/ci/git/diff.rb', line 31

def empty?
  @changed_files.empty?
end

#inspect ⇒ Object

for debug purposes



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# File 'lib/datadog/ci/git/diff.rb', line 41

def inspect
  @changed_files.inspect
end

#lines_changed?(file_path, start_line: nil, end_line: nil) ⇒ Boolean

Check if any lines in the given range are changed for the specified file

Returns:

  • (Boolean) 


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# File 'lib/datadog/ci/git/diff.rb', line 18

def lines_changed?(file_path, start_line: nil, end_line: nil)
  changed_lines = @changed_files[file_path]
  unless changed_lines
    Datadog.logger.debug { "No changes found for file: #{file_path}" }
    return false
  end

  # If either start_line or end_line is nil, return true if file is present
  return true if start_line.nil? || end_line.nil?

  changed_lines.overlaps?(start_line, end_line)
end

#size ⇒ Object

for debug purposes



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# File 'lib/datadog/ci/git/diff.rb', line 36

def size
  @changed_files.size
end