Class: Bibliothecary::Parsers::Pypi

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

Constant Summary collapse

INSTALL_REGEXP = 
/install_requires\s*=\s*\[([\s\S]*?)\]/
REQUIRE_REGEXP =

Capture Group 1 is package. Optional Group 2 is [extras]. Capture Group 3 is Version

/([a-zA-Z0-9]+[a-zA-Z0-9\-_\.]+)(?:\[.*?\])*([><=\w\.,]+)?/
REQUIREMENTS_REGEXP = 
/^#{REQUIRE_REGEXP}/
MANIFEST_REGEXP = 
/.*require[^\/]*(\/)?[^\/]*\.(txt|pip|in)$/
PIP_COMPILE_REGEXP =

TODO: can this be a more specific regexp so it doesn’t match something like “.yarn/cache/create-require-npm-1.0.0.zip”?

/.*require.*$/
PEP_508_NAME_REGEXP =

Adapted from peps.python.org/pep-0508/#names

/^([A-Z0-9][A-Z0-9._-]*[A-Z0-9]|[A-Z0-9])/i
NoEggSpecified =

While the thing in the repo that PyPI is using might be either in egg format or wheel format, PyPI uses “egg” in the fragment of the VCS URL to specify what package in the PyPI index the VCS URL should be treated as.

Class.new(ArgumentError)

Class Method Summary collapse

Methods included from Analyser

create_analysis, create_error_analysis, included

Class Method Details

.map_dependencies(packages, type, source = nil) ⇒ Object 



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# File 'lib/bibliothecary/parsers/pypi.rb', line 142

def self.map_dependencies(packages, type, source = nil)
  return [] unless packages

  packages.map do |name, info|
    Dependency.new(
      name: name,
      requirement: map_requirements(info),
      type: type,
      source: source
    )
  end
end

.map_requirements(info) ⇒ Object 



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# File 'lib/bibliothecary/parsers/pypi.rb', line 155

def self.map_requirements(info)
  if info.is_a?(Hash)
    if info["version"]
      info["version"]
    elsif info["git"]
      "#{info['git']}##{info['ref']}"
    else
      "*"
    end
  else
    info
  end
end

.mapping ⇒ Object 



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# File 'lib/bibliothecary/parsers/pypi.rb', line 23

def self.mapping
  {
    match_filenames("requirements-dev.txt", "requirements/dev.txt",
                    "requirements-docs.txt", "requirements/docs.txt",
                    "requirements-test.txt", "requirements/test.txt",
                    "requirements-tools.txt", "requirements/tools.txt") => {
                      kind: "manifest",
                      parser: :parse_requirements_txt,
                    },
    ->(p) { PIP_COMPILE_REGEXP.match(p) } => {
      content_matcher: :pip_compile?,
      kind: "lockfile",
      parser: :parse_requirements_txt,
    },
    ->(p) { MANIFEST_REGEXP.match(p) } => {
      kind: "manifest",
      parser: :parse_requirements_txt,
      can_have_lockfile: false,
    },
    match_filename("requirements.frozen") => { # pattern exists to store frozen deps in requirements.frozen
      parser: :parse_requirements_txt,
      kind: "lockfile",
    },
    match_filename("pip-resolved-dependencies.txt") => { # Inferred from pip
      kind: "lockfile",
      parser: :parse_requirements_txt,
    },
    match_filename("pip-dependency-graph.json") => { # Exported from pipdeptree --json
      kind: "lockfile",
      parser: :parse_dependency_tree_json,
    },
    match_filename("setup.py") => {
      kind: "manifest",
      parser: :parse_setup_py,
      can_have_lockfile: false,
    },
    match_filename("Pipfile") => {
      kind: "manifest",
      parser: :parse_pipfile,
    },
    match_filename("Pipfile.lock") => {
      kind: "lockfile",
      parser: :parse_pipfile_lock,
    },
    match_filename("pyproject.toml") => {
      kind: "manifest",
      parser: :parse_pyproject,
    },
    match_filename("poetry.lock") => {
      kind: "lockfile",
      parser: :parse_poetry_lock,
    },
    # Pip dependencies can be embedded in conda environment files
    match_filename("environment.yml") => {
      parser: :parse_conda,
      kind: "manifest",
    },
    match_filename("environment.yaml") => {
      parser: :parse_conda,
      kind: "manifest",
    },
  }
end

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



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# File 'lib/bibliothecary/parsers/pypi.rb', line 131

def self.parse_conda(file_contents, options: {})
  contents = YAML.safe_load(file_contents)
  return [] unless contents

  dependencies = contents["dependencies"]
  pip = dependencies.find { |dep| dep.is_a?(Hash) && dep["pip"] }
  return [] unless pip

  Pypi.parse_requirements_txt(pip["pip"].join("\n"), options:)
end

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



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# File 'lib/bibliothecary/parsers/pypi.rb', line 237

def self.parse_dependency_tree_json(file_contents, options: {})
  JSON.parse(file_contents)
    .map do |pkg|
      Dependency.new(
        name: pkg.dig("package", "package_name"),
        requirement: pkg.dig("package", "installed_version"),
        type: "runtime",
        source: options.fetch(:filename, nil)
      )
    end
    .uniq
end

.parse_pep_508_dep_spec(dep) ⇒ Object

Simply parses out the name of a PEP 508 Dependency specification: peps.python.org/pep-0508/ Leaves the rest as-is with any leading semicolons or spaces stripped



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# File 'lib/bibliothecary/parsers/pypi.rb', line 315

def self.parse_pep_508_dep_spec(dep)
  name, requirement = dep.split(PEP_508_NAME_REGEXP, 2).last(2).map(&:strip)
  requirement = requirement.sub(/^[\s;]*/, "")
  requirement = "*" if requirement == ""
  [name, requirement]
end

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



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# File 'lib/bibliothecary/parsers/pypi.rb', line 91

def self.parse_pipfile(file_contents, options: {})
  manifest = Tomlrb.parse(file_contents)
  map_dependencies(manifest["packages"], "runtime", options.fetch(:filename, nil)) +
    map_dependencies(manifest["dev-packages"], "develop", options.fetch(:filename, nil))
end

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



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# File 'lib/bibliothecary/parsers/pypi.rb', line 169

def self.parse_pipfile_lock(file_contents, options: {})
  manifest = JSON.parse(file_contents)
  deps = []
  manifest.each do |group, dependencies|
    next if group == "_meta"

    group = "runtime" if group == "default"
    dependencies.each do |name, info|
      deps << Dependency.new(
        name: name,
        requirement: map_requirements(info),
        type: group,
        source: options.fetch(:filename, nil)
      )
    end
  end
  deps
end

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

TODO: this was deprecated in 8.6.0. Remove this in any major version bump >= 9.*



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# File 'lib/bibliothecary/parsers/pypi.rb', line 126

def self.parse_poetry(file_contents, options: {})
  puts "Warning: parse_poetry() is deprecated, use parse_pyproject() instead."
  parse_pyproject(file_contents, options)
end

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



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# File 'lib/bibliothecary/parsers/pypi.rb', line 188

def self.parse_poetry_lock(file_contents, options: {})
  manifest = Tomlrb.parse(file_contents)
  deps = []
  manifest["package"].each do |package|
    # next if group == "_meta"
    group = case package["category"]
            when "dev"
              "develop"
            else
              "runtime"
            end

    deps << Dependency.new(
      name: package["name"],
      requirement: map_requirements(package),
      type: group,
      source: options.fetch(:filename, nil)
    )
  end
  deps
end

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



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# File 'lib/bibliothecary/parsers/pypi.rb', line 97

def self.parse_pyproject(file_contents, options: {})
  deps = []

  file_contents = Tomlrb.parse(file_contents)

  # Parse poetry [tool.poetry] deps
  poetry_manifest = file_contents.fetch("tool", {}).fetch("poetry", {})
  deps += map_dependencies(poetry_manifest["dependencies"], "runtime", options.fetch(:filename, nil))
  # Poetry 1.0.0-1.2.0 way of defining dev deps
  deps += map_dependencies(poetry_manifest["dev-dependencies"], "develop", options.fetch(:filename, nil))
  # Poetry's 1.2.0+ of defining dev deps
  poetry_manifest
    .fetch("group", {})
    .each_pair do |group_name, obj|
      group_name = "develop" if group_name == "dev"
      deps += map_dependencies(obj.fetch("dependencies", {}), group_name, options.fetch(:filename, nil))
    end

  # Parse PEP621 [project] deps
  pep621_manifest = file_contents.fetch("project", {})
  pep621_deps = pep621_manifest.fetch("dependencies", []).map { |d| parse_pep_508_dep_spec(d) }
  deps += map_dependencies(pep621_deps, "runtime", options.fetch(:filename, nil))

  # We're combining both poetry+PEP621 deps instead of making them mutually exclusive, until we
  # find a reason not to ingest them both.
  deps.uniq
end

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

Parses a requirements.txt file, following the pip.pypa.io/en/stable/cli/pip_install/#requirement-specifiers and pip.pypa.io/en/stable/topics/vcs-support/#git. Invalid lines in requirements.txt are skipped.



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# File 'lib/bibliothecary/parsers/pypi.rb', line 254

def self.parse_requirements_txt(file_contents, options: {})
  deps = []
  type = case options[:filename]
         when /dev/ || /docs/ || /tools/
           "development"
         when /test/
           "test"
         else
           "runtime"
         end

  file_contents.split("\n").each do |line|
    if line["://"]
      begin
        result = parse_requirements_txt_url(line, type, options.fetch(:filename, nil))
      rescue URI::Error, NoEggSpecified
        next
      end

      deps << result
    elsif (match = line.delete(" ").match(REQUIREMENTS_REGEXP))
      deps << Dependency.new(
        name: match[1],
        requirement: match[-1],
        type: type,
        source: options.fetch(:filename, nil)
      )
    end
  end

  deps.uniq
end

.parse_requirements_txt_url(url, type = nil, source = nil) ⇒ Object

Raises:



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# File 'lib/bibliothecary/parsers/pypi.rb', line 287

def self.parse_requirements_txt_url(url, type = nil, source = nil)
  uri = URI.parse(url)
  raise NoEggSpecified, "No egg specified in #{url}" unless uri.fragment

  name = uri.fragment[/^egg=([^&]+)([&]|$)/, 1]
  raise NoEggSpecified, "No egg specified in #{url}" unless name

  requirement = uri.path[/@(.+)$/, 1]

  Dependency.new(
    name: name,
    requirement: requirement,
    type: type,
    source: source
  )
end

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



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# File 'lib/bibliothecary/parsers/pypi.rb', line 210

def self.parse_setup_py(file_contents, options: {})
  match = file_contents.match(INSTALL_REGEXP)
  return [] unless match

  deps = []
  match[1].gsub(/',(\s)?'/, "\n").split("\n").each do |line|
    next if line.match(/^#/)

    match = line.match(REQUIRE_REGEXP)
    next unless match

    deps << Dependency.new(
      name: match[1],
      requirement: match[-1],
      type: "runtime",
      source: options.fetch(:filename, nil)
    )
  end
  deps
end

.pip_compile?(file_contents) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bibliothecary/parsers/pypi.rb', line 304

def self.pip_compile?(file_contents)
  file_contents.include?("This file is autogenerated by pip-compile")
rescue Exception # rubocop:disable Lint/RescueException
  # We rescue exception here since native libs can throw a non-StandardError
  # We don't want to throw errors during the matching phase, only during
  # parsing after we match.
  false
end