Module: RailVerdict::Repair::DiffContext

Defined in:
lib/rail_verdict/repair/diff_context.rb

Constant Summary collapse

MAX_BYTES = 
16 * 1024
CONTEXT_LINES = 
15

Class Method Summary collapse

Class Method Details

.build(repository_root:, runner:, finding:, git_context:) ⇒ Object 



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# File 'lib/rail_verdict/repair/diff_context.rb', line 9

def self.build(repository_root:, runner:, finding:, git_context:)
  hunk = ""
  truncated = false
  return { "hunk" => "", "truncated" => false } unless finding && git_context

  path = finding.location["path"] || finding.location[:path]
  line = finding.location["start_line"] || finding.location[:start_line]
  return { "hunk" => "", "truncated" => false } unless path

  result = runner.run("git", ["diff", "-U#{CONTEXT_LINES}", git_context.merge_base, git_context.head, "--", path], chdir: repository_root, timeout_seconds: 5.0, max_stdout_bytes: MAX_BYTES + 1024)
  raw = result.stdout.to_s
  raw = raw.encode(Encoding::UTF_8, invalid: :replace, undef: :replace, replace: "?")
  raw = raw.gsub(/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]/, "?")
  if raw.bytesize > MAX_BYTES
    raw = raw.byteslice(0, MAX_BYTES)
    truncated = true
  end
  if line
    hunk = extract_target_hunk(raw, line)
    hunk = raw if hunk.empty?
  else
    hunk = raw
  end
  if hunk.bytesize > MAX_BYTES
    hunk = hunk.byteslice(0, MAX_BYTES)
    truncated = true
  end
  { "hunk" => hunk, "truncated" => truncated }
rescue StandardError
  { "hunk" => "", "truncated" => false }
end