Class: Bibliothecary::Parsers::NPM

Inherits:
Object
  • Object
show all
Includes:
Analyser
Defined in:
lib/bibliothecary/parsers/npm.rb

Constant Summary collapse

PACKAGE_LOCK_JSON_MAX_DEPTH =

Max depth to recurse into the “dependencies” property of package-lock.json

10

Class Method Summary collapse

Methods included from Analyser

create_analysis, create_error_analysis, included

Class Method Details

.lockfile_preference_order(file_infos) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 438

def self.lockfile_preference_order(file_infos)
  files = file_infos.each_with_object({}) do |file_info, obj|
    obj[File.basename(file_info.full_path)] = file_info
  end

  if files["npm-shrinkwrap.json"]
    [files["npm-shrinkwrap.json"]] + files.values.reject { |fi| File.basename(fi.full_path) == "npm-shrinkwrap.json" }
  else
    files.values
  end
end

.mapping ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 13

def self.mapping
  {
    match_filename("package.json") => {
      kind: "manifest",
      parser: :parse_manifest,
    },
    match_filename("yarn.lock") => {
      kind: "lockfile",
      parser: :parse_yarn_lock,
    },
    match_filename("package-lock.json") => {
      kind: "lockfile",
      parser: :parse_package_lock,
    },
    match_filename("pnpm-lock.yaml") => {
      kind: "lockfile",
      parser: :parse_pnpm_lock,
    },
    match_filename("npm-ls.json") => {
      kind: "lockfile",
      parser: :parse_ls,
    },
    match_filename("npm-shrinkwrap.json") => {
      kind: "lockfile",
      parser: :parse_shrinkwrap,
    },
    match_filename("bun.lock") => {
      kind: "lockfile",
      parser: :parse_bun_lock,
    },
  }
end

.parse_bun_lock(file_contents, options: {}) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 409

def self.parse_bun_lock(file_contents, options: {})
  # The stdlib JSON gem 2.8+ supports trailing commas.
  # The Oj gem does not support them as of writing, and will override
  # JSON.parse() if Oj.mimic_json/optimize_rails has been called. Luckily
  # JSON.parser is not overridden by Oj, so use it to call parse directly.
  manifest = JSON.parser.parse(file_contents, allow_trailing_comma: true)
  source = options.fetch(:filename, nil)

  dev_deps = manifest.dig("workspaces", "", "devDependencies")&.keys&.to_set

  dependencies = manifest.fetch("packages", []).map do |name, info|
    info_name, _, version = info.first.rpartition("@")
    is_local = version&.start_with?("file:")
    is_alias = info_name != name

    Dependency.new(
      name: info_name,
      original_name: is_alias ? name : nil,
      requirement: version,
      original_requirement: is_alias ? version : nil,
      type: dev_deps&.include?(name) ? "development" : "runtime",
      local: is_local,
      source: source,
      platform: platform_name
    )
  end
  ParserResult.new(dependencies: dependencies)
end

.parse_ls(file_contents, options: {}) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 402

def self.parse_ls(file_contents, options: {})
  manifest = JSON.parse(file_contents)

  dependencies = transform_tree_to_array(manifest.fetch("dependencies", {}), options.fetch(:filename, nil))
  ParserResult.new(dependencies: dependencies)
end

.parse_manifest(file_contents, options: {}) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 125

def self.parse_manifest(file_contents, options: {})
  # on ruby 3.2 we suddenly get this JSON error, so detect and return early: "package.json: unexpected token at ''"
  return ParserResult.new(dependencies: []) if file_contents.empty?

  manifest = JSON.parse(file_contents)

  raise "appears to be a lockfile rather than manifest format" if manifest.key?("lockfileVersion")

  dependencies = manifest.fetch("dependencies", [])
    .reject { |name, _requirement| name.start_with?("//") } # Omit comment keys. They are valid in package.json: https://groups.google.com/g/nodejs/c/NmL7jdeuw0M/m/yTqI05DRQrIJ
    .map do |name, requirement|
      # check to see if this is an aliased package name
      # example: "alias-package-name": "npm:actual-package@^1.1.3"
      if requirement.include?("npm:")
        # the name of the real dependency is contained in the requirement with the version
        requirement.gsub!("npm:", "")
        original_name = name
        name, _, requirement = requirement.rpartition("@")
      end

      Dependency.new(
        name: name,
        original_name: original_name,
        requirement: requirement,
        original_requirement: original_name.nil? ? nil : requirement,
        type: "runtime",
        local: requirement.start_with?("file:"),
        source: options.fetch(:filename, nil),
        platform: platform_name
      )
    end

  dependencies += manifest.fetch("devDependencies", [])
    .reject { |name, _requirement| name.start_with?("//") } # Omit comment keys. They are valid in package.json: https://groups.google.com/g/nodejs/c/NmL7jdeuw0M/m/yTqI05DRQrIJ
    .map do |name, requirement|
      Dependency.new(
        name: name,
        requirement: requirement,
        type: "development",
        local: requirement.start_with?("file:"),
        source: options.fetch(:filename, nil),
        platform: platform_name
      )
    end

  ParserResult.new(dependencies: dependencies)
end

.parse_package_lock(file_contents, options: {}) ⇒ Object Also known as: parse_shrinkwrap 



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# File 'lib/bibliothecary/parsers/npm.rb', line 46

def self.parse_package_lock(file_contents, options: {})
  manifest = JSON.parse(file_contents)
  # https://docs.npmjs.com/cli/v9/configuring-npm/package-lock-json#lockfileversion
  dependencies = if manifest["lockfileVersion"].to_i <= 1
                   # lockfileVersion 1 uses the "dependencies" object
                   parse_package_lock_v1(manifest, options.fetch(:filename, nil))
                 else
                   # lockfileVersion 2 has backwards-compatability by including both "packages" and the legacy "dependencies" object
                   # lockfileVersion 3 has no backwards-compatibility and only includes the "packages" object
                   parse_package_lock_v2(manifest, options.fetch(:filename, nil))
                 end
  ParserResult.new(dependencies: dependencies)
end

.parse_package_lock_deps_recursively(dependencies, source = nil, depth = 1) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 104

def self.parse_package_lock_deps_recursively(dependencies, source = nil, depth = 1)
  dependencies.flat_map do |name, requirement|
    type = requirement.fetch("dev", false) ? "development" : "runtime"
    version = requirement.key?("from") ? requirement["from"][/#(?:semver:)?v?(.*)/, 1] : nil
    version ||= requirement["version"].split("#").last
    child_dependencies = if depth >= PACKAGE_LOCK_JSON_MAX_DEPTH
                           []
                         else
                           parse_package_lock_deps_recursively(requirement.fetch("dependencies", []), source, depth + 1)
                         end

    [Dependency.new(
      name: name,
      requirement: version,
      type: type,
      source: source,
      platform: platform_name
    )] + child_dependencies
  end
end

.parse_package_lock_v1(manifest, source = nil) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 65

def self.parse_package_lock_v1(manifest, source = nil)
  parse_package_lock_deps_recursively(manifest.fetch("dependencies", []), source)
end

.parse_package_lock_v2(manifest, source = nil) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 69

def self.parse_package_lock_v2(manifest, source = nil)
  # "packages" is a flat object where each key is the installed location of the dep, e.g. node_modules/foo/node_modules/bar.
  manifest
    .fetch("packages")
    # there are a couple of scenarios where a package's name won't start with node_modules
    #   1. name == "", this is the lockfile's package itself
    #   2. when a package is a local path dependency, it will appear in package-lock.json twice.
    #      * One occurrence has the node_modules/ prefix in the name (which we keep)
    #      * The other occurrence's name is the path to the local dependency (which has less information, and is duplicative, so we discard)
    .select { |name, _dep| name.start_with?("node_modules") }
    .map do |name, dep|
      # check if the name property is available and differs from the node modules location
      # this indicates that the package has been aliased
      node_module_name = name.split("node_modules/").last
      name_property = dep["name"]
      if !name_property.nil? && node_module_name != name_property
        name = name_property
        original_name = node_module_name
      else
        name = node_module_name
      end

      Dependency.new(
        name: name,
        original_name: original_name,
        requirement: dep["version"],
        original_requirement: original_name.nil? ? nil : dep["version"],
        type: dep.fetch("dev", false) || dep.fetch("devOptional", false) ? "development" : "runtime",
        local: dep.fetch("link", false),
        source: source,
        platform: platform_name
      )
    end
end

.parse_pnpm_lock(contents, options: {}) ⇒ Object

This method currently has been tested to support:

lockfileVersion: '9.0'
lockfileVersion: '6.0'
lockfileVersion: '5.4'



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# File 'lib/bibliothecary/parsers/npm.rb', line 387

def self.parse_pnpm_lock(contents, options: {})
  parsed = YAML.load(contents)
  lockfile_version = parsed["lockfileVersion"].to_i

  dependencies = case lockfile_version
                 when 5
                   parse_v5_pnpm_lock(parsed, options.fetch(:filename, nil))
                 when 6
                   parse_v6_pnpm_lock(parsed, options.fetch(:filename, nil))
                 else # v9+
                   parse_v9_pnpm_lock(parsed, options.fetch(:filename, nil))
                 end
  ParserResult.new(dependencies: dependencies)
end

.parse_v1_yarn_lock(contents, source = nil) ⇒ Object

Returns a hash representation of the deps in yarn.lock, eg: [ 

name: "foo",
requirements: [["foo", "^1.0.0"], ["foo", "^1.0.1"]],
version: "1.2.0",

, …]



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# File 'lib/bibliothecary/parsers/npm.rb', line 201

def self.parse_v1_yarn_lock(contents, source = nil)
  contents
    .encode(universal_newline: true)
    .gsub(/^#.*/, "")
    .strip
    .split("\n\n")
    .map do |chunk|
      requirements = chunk
        .lines
        .find { |l| !l.start_with?(" ") && l.strip.end_with?(":") } # first line, eg: '"@bar/[email protected]", "@bar/foo@^1.0.1":'
        .strip
        .gsub(/"|:$/, "") # don't need quotes or trailing colon
        .split(",") # split the list of requirements

      name, alias_name = yarn_strip_npm_protocol(requirements.first) # if a package is aliased, strip the alias and return the real package name
      name = name.strip.split(/(?<!^)@/).first
      requirements = requirements.map { |d| d.strip.split(/(?<!^)@/, 2) } # split each requirement on name/version "@"", not on leading namespace "@"
      version = chunk.match(/version "?([^"]*)"?/)[1]

      {
        name: name,
        original_name: alias_name,
        requirements: requirements.map { |x| x[1] },
        original_requirement: alias_name.nil? ? nil : version,
        version: version,
        source: source,
      }
    end
end

.parse_v2_yarn_lock(contents, source = nil) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 231

def self.parse_v2_yarn_lock(contents, source = nil)
  parsed = YAML.load(contents)
  parsed = parsed.except("__metadata")
  parsed
    .reject do |packages, info|
      # yarn v4+ creates a lockfile entry: "myproject@workspace" with a "use.local" version
      #   this lockfile entry is a reference to the project to which the lockfile belongs
      # skip this self-referential package
      (info["version"].to_s.include?("use.local") && packages.include?("workspace")) ||
        # yarn allows users to insert patches to their dependencies from within their project
        # these patches are marked as a separate entry in the lock file but do not represent a new dependency
        # and should be skipped here
        # https://yarnpkg.com/protocol/patch
        packages.include?("@patch:")
    end
    .map do |packages, info|
      packages = packages.split(", ")
      # use first requirement's name, assuming that deps will always resolve from deps of the same name
      name, alias_name = yarn_strip_npm_protocol(packages.first.rpartition("@").first)
      requirements = packages.map { |p| p.rpartition("@").last.gsub(/^.*:/, "") }

      {
        name: name,
        original_name: alias_name,
        requirements: requirements,
        original_requirement: alias_name.nil? ? nil : info["version"].to_s,
        version: info["version"].to_s,
        source: source,
      }
    end
end

.parse_v5_pnpm_lock(parsed_contents, source = nil) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 263

def self.parse_v5_pnpm_lock(parsed_contents, source = nil)
  dependency_mapping = parsed_contents.fetch("dependencies", {})
    .merge(parsed_contents.fetch("devDependencies", {}))

  parsed_contents["packages"]
    .map do |name_version, details|
      # e.g. "/debug/2.6.9" or "/@babel/types/7.28.1"
      name, _slash, version = name_version.sub(/^\//, "").rpartition("/")

      # e.g. "/debug/[email protected]:"
      version = version.split("_", 2)[0]

      # e.g. "alias-package: /zod/3.24.2"
      original_name = nil
      original_requirement = nil
      if (alias_dep = dependency_mapping.find { |_n, v| v.start_with?("/#{name}/") })
        original_name = alias_dep[0]
        original_requirement = alias_dep[1].split("/", 3)[2] # e.g. "/zod/3.24.2"
      end

      is_dev = details["dev"] == true

      Dependency.new(
        name: name,
        requirement: version,
        original_name: original_name,
        original_requirement: original_requirement,
        type: is_dev ? "development" : "runtime",
        source: source,
        platform: platform_name
      )
    end
end

.parse_v6_pnpm_lock(parsed_contents, source = nil) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 297

def self.parse_v6_pnpm_lock(parsed_contents, source = nil)
  dependency_mapping = parsed_contents.fetch("dependencies", {})
    .merge(parsed_contents.fetch("devDependencies", {}))

  parsed_contents["packages"]
    .map do |name_version, details|
      # e.g. "/[email protected]:"
      name, version = name_version.sub(/^\//, "").split(/(?<!^)@/, 2)

      # e.g. "[email protected]([email protected])"
      version = version.split("(", 2).first

      # e.g.
      #  alias-package:
      #    specifier: npm:zod
      #    version: /[email protected]
      original_name = nil
      original_requirement = nil
      if (alias_dep = dependency_mapping.find { |_n, info| info["specifier"] == "npm:#{name}" })
        original_name = alias_dep[0]
        original_requirement = alias_dep[1]["version"].sub(/^\//, "").split("@", 2)[1]
      end

      is_dev = details["dev"] == true

      Dependency.new(
        name: name,
        requirement: version,
        original_name: original_name,
        original_requirement: original_requirement,
        type: is_dev ? "development" : "runtime",
        source: source,
        platform: platform_name
      )
    end
end

.parse_v9_pnpm_lock(parsed_contents, source = nil) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 334

def self.parse_v9_pnpm_lock(parsed_contents, source = nil)
  dependencies = parsed_contents.fetch("importers", {}).fetch(".", {}).fetch("dependencies", {})
  dev_dependencies = parsed_contents.fetch("importers", {}).fetch(".", {}).fetch("devDependencies", {})
  dependency_mapping = dependencies.merge(dev_dependencies)

  # "dependencies" is in "packages" for < v9 and in "snapshots" for >= v9
  # as of https://github.com/pnpm/pnpm/pull/7700.
  parsed_contents["snapshots"]
    .map do |name_version, _details|
      # e.g. "[email protected]" or "@babel/[email protected]"
      name, version = name_version.split(/(?<!^)@/, 2)

      # e.g. "[email protected]([email protected])"
      version = version.split("(", 2).first

      # e.g.
      #  alias-package:
      #    specifier: npm:zod
      #    version: [email protected]
      original_name = nil
      original_requirement = nil
      if (alias_dep = dependency_mapping.find { |_n, info| info["specifier"] == "npm:#{name}" })
        original_name = alias_dep[0]
        original_requirement = alias_dep[1]["version"].split("@", 2)[1]
      end

      # TODO: the "dev" field was removed in v9 lockfiles (https://github.com/pnpm/pnpm/pull/7808)
      # The proper way to set this for v9+ is to build a lookup of deps to
      # their "dependencies", and then recurse through each package's
      # parents. If the direct dep(s) that required them are all
      # "devDependencies" then we can consider them "dev == true". This
      # should be done using a DAG data structure, though, to be efficient
      # and avoid cycles.
      is_dev ||= dev_dependencies.any? do |dev_name, dev_details|
        dev_name == name && dev_details["version"] == version
      end

      Dependency.new(
        name: name,
        requirement: version,
        original_name: original_name,
        original_requirement: original_requirement,
        type: is_dev ? "development" : "runtime",
        source: source,
        platform: platform_name
      )
    end
end

.parse_yarn_lock(file_contents, options: {}) ⇒ Object 



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# File 'lib/bibliothecary/parsers/npm.rb', line 173

def self.parse_yarn_lock(file_contents, options: {})
  dep_hash = if file_contents.match(/__metadata:/)
               parse_v2_yarn_lock(file_contents, options.fetch(:filename, nil))
             else
               parse_v1_yarn_lock(file_contents, options.fetch(:filename, nil))
             end

  dependencies = dep_hash.map do |dep|
    Dependency.new(
      name: dep[:name],
      original_name: dep[:original_name],
      requirement: dep[:version],
      original_requirement: dep[:original_requirement],
      type: nil, # yarn.lock doesn't report on the type of dependency
      local: dep[:requirements]&.first&.start_with?("file:"),
      source: options.fetch(:filename, nil),
      platform: platform_name
    )
  end
  ParserResult.new(dependencies: dependencies)
end