Module: Toml::Merge

Defined in:
lib/toml/merge.rb,
lib/toml/merge/version.rb

Defined Under Namespace

Modules: Version Classes: ParseError

Constant Summary collapse

PACKAGE_NAME = 
"toml-merge"
DESTINATION_WINS_ARRAY_POLICY = 
{
  surface: "array",
  name: "destination_wins_array"
}.freeze
VERSION = 
Version::VERSION

Class Method Summary collapse

Class Method Details

.analyze_toml_source(source, dialect) ⇒ Object 



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# File 'lib/toml/merge.rb', line 54

def analyze_toml_source(source, dialect)
  return unsupported_feature_result("Unsupported TOML dialect #{dialect}.") unless dialect == "toml"

  parsed = parse_toml_document(source)
  {
    ok: true,
    diagnostics: [],
    analysis: {
      kind: "toml",
      dialect: "toml",
      normalized_source: canonical_toml(parsed),
      root_kind: "table",
      owners: collect_toml_owners(parsed)
    },
    policies: []
  }
rescue StandardError => e
  parse_error_result(e.message)
end

.available_toml_backends ⇒ Object 



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# File 'lib/toml/merge.rb', line 26

def available_toml_backends
  [TreeHaver::KREUZBERG_LANGUAGE_PACK_BACKEND]
end

.match_toml_owners(template, destination) ⇒ Object 



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# File 'lib/toml/merge.rb', line 88

def match_toml_owners(template, destination)
  destination_paths = destination[:owners].to_h { |owner| [owner[:path], true] }
  template_paths = template[:owners].to_h { |owner| [owner[:path], true] }

  {
    matched: template[:owners]
      .filter { |owner| destination_paths[owner[:path]] }
      .map { |owner| { template_path: owner[:path], destination_path: owner[:path] } },
    unmatched_template: template[:owners].map { |owner| owner[:path] }.reject { |path| destination_paths[path] },
    unmatched_destination: destination[:owners].map { |owner| owner[:path] }.reject { |path| template_paths[path] }
  }
end

.merge_toml(template_source, destination_source, dialect, backend: nil) ⇒ Object 



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# File 'lib/toml/merge.rb', line 135

def merge_toml(template_source, destination_source, dialect, backend: nil)
  resolved_backend = resolve_backend(backend)
  return unsupported_feature_result("Unsupported TOML backend #{resolved_backend}.") unless resolved_backend == TreeHaver::KREUZBERG_LANGUAGE_PACK_BACKEND.id

  merge_toml_with_parser(template_source, destination_source, dialect) do |source, parse_dialect|
    parse_toml(source, parse_dialect, backend: resolved_backend)
  end
end

.merge_toml_with_parser(template_source, destination_source, dialect, &parser) ⇒ Object 



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# File 'lib/toml/merge.rb', line 101

def merge_toml_with_parser(template_source, destination_source, dialect, &parser)
  template = parser.call(template_source, dialect)
  return { ok: false, diagnostics: template[:diagnostics], policies: [] } unless template[:ok]

  destination = parser.call(destination_source, dialect)
  unless destination[:ok]
    return {
      ok: false,
      diagnostics: destination[:diagnostics].map do |diagnostic|
        diagnostic[:category] == "parse_error" ? diagnostic.merge(category: "destination_parse_error") : diagnostic
      end,
      policies: []
    }
  end

  merged = merge_toml_tables(
    parse_toml_document(template.dig(:analysis, :normalized_source)),
    parse_toml_document(destination.dig(:analysis, :normalized_source))
  )

  {
    ok: true,
    diagnostics: [],
    output: canonical_toml(merged),
    policies: [DESTINATION_WINS_ARRAY_POLICY]
  }
rescue StandardError => e
  {
    ok: false,
    diagnostics: [{ severity: "error", category: "destination_parse_error", message: e.message }],
    policies: []
  }
end

.parse_toml(source, dialect, backend: nil) ⇒ Object 



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# File 'lib/toml/merge.rb', line 74

def parse_toml(source, dialect, backend: nil)
  return unsupported_feature_result("Unsupported TOML dialect #{dialect}.") unless dialect == "toml"

  resolved_backend = resolve_backend(backend)
  return unsupported_feature_result("Unsupported TOML backend #{resolved_backend}.") unless resolved_backend == TreeHaver::KREUZBERG_LANGUAGE_PACK_BACKEND.id

  syntax_result = TreeHaver.parse_with_language_pack(
    TreeHaver::ParserRequest.new(source: source, language: "toml", dialect: dialect)
  )
  return { ok: false, diagnostics: syntax_result[:diagnostics] } unless syntax_result[:ok]

  analyze_toml_source(source, dialect)
end

.toml_backend_feature_profile(backend: nil) ⇒ Object 



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# File 'lib/toml/merge.rb', line 30

def toml_backend_feature_profile(backend: nil)
  resolved_backend = resolve_backend(backend)
  return unsupported_feature_result("Unsupported TOML backend #{resolved_backend}.") unless resolved_backend == TreeHaver::KREUZBERG_LANGUAGE_PACK_BACKEND.id

  toml_feature_profile.merge(
    backend: TreeHaver::KREUZBERG_LANGUAGE_PACK_BACKEND.id,
    backend_ref: TreeHaver::KREUZBERG_LANGUAGE_PACK_BACKEND.to_h
  )
end

.toml_feature_profile ⇒ Object 



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# File 'lib/toml/merge.rb', line 18

def toml_feature_profile
  {
    family: "toml",
    supported_dialects: ["toml"],
    supported_policies: [DESTINATION_WINS_ARRAY_POLICY]
  }
end

.toml_plan_context(backend: nil) ⇒ Object 



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# File 'lib/toml/merge.rb', line 40

def toml_plan_context(backend: nil)
  profile = toml_backend_feature_profile(backend: backend)
  return profile if profile[:ok] == false

  {
    family_profile: toml_feature_profile,
    feature_profile: {
      backend: profile[:backend],
      supports_dialects: false,
      supported_policies: profile[:supported_policies]
    }
  }
end