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piplicenses.py
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piplicenses.py
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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8 ff=unix ft=python ts=4 sw=4 sts=4 si et
"""
pip-licenses
MIT License
Copyright (c) 2018 raimon
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
"""
from __future__ import annotations
import argparse
import codecs
import re
import sys
from collections import Counter
from enum import Enum, auto
from functools import partial
from importlib import metadata as importlib_metadata
from importlib.metadata import Distribution
from pathlib import Path
from typing import TYPE_CHECKING, Iterable, List, Type, cast
from prettytable import ALL as RULE_ALL
from prettytable import FRAME as RULE_FRAME
from prettytable import HEADER as RULE_HEADER
from prettytable import NONE as RULE_NONE
from prettytable import PrettyTable
if TYPE_CHECKING:
from typing import Iterator, Optional, Sequence
open = open # allow monkey patching
__pkgname__ = "pip-licenses"
__version__ = "4.1.0"
__author__ = "raimon"
__license__ = "MIT"
__summary__ = (
"Dump the software license list of Python packages installed with pip."
)
__url__ = "https://github.com/raimon49/pip-licenses"
FIELD_NAMES = (
"Name",
"Version",
"License",
"LicenseFile",
"LicenseText",
"NoticeFile",
"NoticeText",
"Author",
"Description",
"URL",
)
SUMMARY_FIELD_NAMES = (
"Count",
"License",
)
DEFAULT_OUTPUT_FIELDS = (
"Name",
"Version",
)
SUMMARY_OUTPUT_FIELDS = (
"Count",
"License",
)
METADATA_KEYS = (
"home-page",
"author",
"license",
"summary",
)
# Mapping of FIELD_NAMES to METADATA_KEYS where they differ by more than case
FIELDS_TO_METADATA_KEYS = {
"URL": "home-page",
"Description": "summary",
"License-Metadata": "license",
"License-Classifier": "license_classifier",
}
SYSTEM_PACKAGES = (
__pkgname__,
"pip",
"prettytable",
"wcwidth",
"setuptools",
"wheel",
)
LICENSE_UNKNOWN = "UNKNOWN"
def get_packages(
args: CustomNamespace,
) -> Iterator[dict[str, str | list[str]]]:
def get_pkg_included_file(
pkg: Distribution, file_names_rgx: str
) -> tuple[str, str]:
"""
Attempt to find the package's included file on disk and return the
tuple (included_file_path, included_file_contents).
"""
included_file = LICENSE_UNKNOWN
included_text = LICENSE_UNKNOWN
pkg_files = pkg.files or ()
pattern = re.compile(file_names_rgx)
matched_rel_paths = filter(
lambda file: pattern.match(file.name), pkg_files
)
for rel_path in matched_rel_paths:
abs_path = Path(pkg.locate_file(rel_path))
if not abs_path.is_file():
continue
included_file = str(abs_path)
with open(
abs_path, encoding="utf-8", errors="backslashreplace"
) as included_file_handle:
included_text = included_file_handle.read()
break
return (included_file, included_text)
def get_pkg_info(pkg: Distribution) -> dict[str, str | list[str]]:
(license_file, license_text) = get_pkg_included_file(
pkg, "LICEN[CS]E.*|COPYING.*"
)
(notice_file, notice_text) = get_pkg_included_file(pkg, "NOTICE.*")
pkg_info: dict[str, str | list[str]] = {
"name": pkg.metadata["name"],
"version": pkg.version,
"namever": "{} {}".format(pkg.metadata["name"], pkg.version),
"licensefile": license_file,
"licensetext": license_text,
"noticefile": notice_file,
"noticetext": notice_text,
}
metadata = pkg.metadata
for key in METADATA_KEYS:
pkg_info[key] = metadata.get(key, LICENSE_UNKNOWN) # type: ignore[attr-defined] # noqa: E501
classifiers: list[str] = metadata.get_all("classifier", [])
pkg_info["license_classifier"] = find_license_from_classifier(
classifiers
)
if args.filter_strings:
def filter_string(item: str) -> str:
return item.encode(
args.filter_code_page, errors="ignore"
).decode(args.filter_code_page)
for k in pkg_info:
if isinstance(pkg_info[k], list):
pkg_info[k] = list(map(filter_string, pkg_info[k]))
else:
pkg_info[k] = filter_string(cast(str, pkg_info[k]))
return pkg_info
pkgs = importlib_metadata.distributions()
ignore_pkgs_as_lower = [pkg.lower() for pkg in args.ignore_packages]
pkgs_as_lower = [pkg.lower() for pkg in args.packages]
fail_on_licenses = set()
if args.fail_on:
fail_on_licenses = set(map(str.strip, args.fail_on.split(";")))
allow_only_licenses = set()
if args.allow_only:
allow_only_licenses = set(map(str.strip, args.allow_only.split(";")))
for pkg in pkgs:
pkg_name = pkg.metadata["name"]
if pkg_name.lower() in ignore_pkgs_as_lower:
continue
if pkgs_as_lower and pkg_name.lower() not in pkgs_as_lower:
continue
if not args.with_system and pkg_name in SYSTEM_PACKAGES:
continue
pkg_info = get_pkg_info(pkg)
license_names = select_license_by_source(
args.from_,
cast(List[str], pkg_info["license_classifier"]),
cast(str, pkg_info["license"]),
)
if fail_on_licenses:
failed_licenses = case_insensitive_set_intersect(
license_names, fail_on_licenses
)
if failed_licenses:
sys.stderr.write(
"fail-on license {} was found for package "
"{}:{}".format(
"; ".join(sorted(failed_licenses)),
pkg_info["name"],
pkg_info["version"],
)
)
sys.exit(1)
if allow_only_licenses:
uncommon_licenses = case_insensitive_set_diff(
license_names, allow_only_licenses
)
if len(uncommon_licenses) == len(license_names):
sys.stderr.write(
"license {} not in allow-only licenses was found"
" for package {}:{}".format(
"; ".join(sorted(uncommon_licenses)),
pkg_info["name"],
pkg_info["version"],
)
)
sys.exit(1)
yield pkg_info
def create_licenses_table(
args: CustomNamespace,
output_fields: Iterable[str] = DEFAULT_OUTPUT_FIELDS,
) -> PrettyTable:
table = factory_styled_table_with_args(args, output_fields)
for pkg in get_packages(args):
row = []
for field in output_fields:
if field == "License":
license_set = select_license_by_source(
args.from_,
cast(List[str], pkg["license_classifier"]),
cast(str, pkg["license"]),
)
license_str = "; ".join(sorted(license_set))
row.append(license_str)
elif field == "License-Classifier":
row.append(
"; ".join(sorted(pkg["license_classifier"]))
or LICENSE_UNKNOWN
)
elif field.lower() in pkg:
row.append(cast(str, pkg[field.lower()]))
else:
row.append(cast(str, pkg[FIELDS_TO_METADATA_KEYS[field]]))
table.add_row(row)
return table
def create_summary_table(args: CustomNamespace) -> PrettyTable:
counts = Counter(
"; ".join(
sorted(
select_license_by_source(
args.from_,
cast(List[str], pkg["license_classifier"]),
cast(str, pkg["license"]),
)
)
)
for pkg in get_packages(args)
)
table = factory_styled_table_with_args(args, SUMMARY_FIELD_NAMES)
for license, count in counts.items():
table.add_row([count, license])
return table
def case_insensitive_set_intersect(set_a, set_b):
"""Same as set.intersection() but case-insensitive"""
common_items = set()
set_b_lower = {item.lower() for item in set_b}
for elem in set_a:
if elem.lower() in set_b_lower:
common_items.add(elem)
return common_items
def case_insensitive_set_diff(set_a, set_b):
"""Same as set.difference() but case-insensitive"""
uncommon_items = set()
set_b_lower = {item.lower() for item in set_b}
for elem in set_a:
if not elem.lower() in set_b_lower:
uncommon_items.add(elem)
return uncommon_items
class JsonPrettyTable(PrettyTable):
"""PrettyTable-like class exporting to JSON"""
def _format_row(self, row: Iterable[str]) -> dict[str, str | list[str]]:
resrow: dict[str, str | List[str]] = {}
for field, value in zip(self._field_names, row):
resrow[field] = value
return resrow
def get_string(self, **kwargs: str | list[str]) -> str:
# import included here in order to limit dependencies
# if not interested in JSON output,
# then the dependency is not required
import json
options = self._get_options(kwargs)
rows = self._get_rows(options)
formatted_rows = self._format_rows(rows)
lines = []
for row in formatted_rows:
lines.append(row)
return json.dumps(lines, indent=2, sort_keys=True)
class JsonLicenseFinderTable(JsonPrettyTable):
def _format_row(self, row: Iterable[str]) -> dict[str, str | list[str]]:
resrow: dict[str, str | List[str]] = {}
for field, value in zip(self._field_names, row):
if field == "Name":
resrow["name"] = value
if field == "Version":
resrow["version"] = value
if field == "License":
resrow["licenses"] = [value]
return resrow
def get_string(self, **kwargs: str | list[str]) -> str:
# import included here in order to limit dependencies
# if not interested in JSON output,
# then the dependency is not required
import json
options = self._get_options(kwargs)
rows = self._get_rows(options)
formatted_rows = self._format_rows(rows)
lines = []
for row in formatted_rows:
lines.append(row)
return json.dumps(lines, sort_keys=True)
class CSVPrettyTable(PrettyTable):
"""PrettyTable-like class exporting to CSV"""
def get_string(self, **kwargs: str | list[str]) -> str:
def esc_quotes(val: bytes | str) -> str:
"""
Meta-escaping double quotes
https://tools.ietf.org/html/rfc4180
"""
try:
return cast(str, val).replace('"', '""')
except UnicodeDecodeError: # pragma: no cover
return cast(bytes, val).decode("utf-8").replace('"', '""')
except UnicodeEncodeError: # pragma: no cover
return str(
cast(str, val).encode("unicode_escape").replace('"', '""') # type: ignore[arg-type] # noqa: E501
)
options = self._get_options(kwargs)
rows = self._get_rows(options)
formatted_rows = self._format_rows(rows)
lines = []
formatted_header = ",".join(
['"%s"' % (esc_quotes(val),) for val in self._field_names]
)
lines.append(formatted_header)
for row in formatted_rows:
formatted_row = ",".join(
['"%s"' % (esc_quotes(val),) for val in row]
)
lines.append(formatted_row)
return "\n".join(lines)
class PlainVerticalTable(PrettyTable):
"""PrettyTable for outputting to a simple non-column based style.
When used with --with-license-file, this style is similar to the default
style generated from Angular CLI's --extractLicenses flag.
"""
def get_string(self, **kwargs: str | list[str]) -> str:
options = self._get_options(kwargs)
rows = self._get_rows(options)
output = ""
for row in rows:
for v in row:
output += "{}\n".format(v)
output += "\n"
return output
def factory_styled_table_with_args(
args: CustomNamespace,
output_fields: Iterable[str] = DEFAULT_OUTPUT_FIELDS,
) -> PrettyTable:
table = PrettyTable()
table.field_names = output_fields # type: ignore[assignment]
table.align = "l" # type: ignore[assignment]
table.border = args.format_ in (
FormatArg.MARKDOWN,
FormatArg.RST,
FormatArg.CONFLUENCE,
FormatArg.JSON,
)
table.header = True
if args.format_ == FormatArg.MARKDOWN:
table.junction_char = "|"
table.hrules = RULE_HEADER
elif args.format_ == FormatArg.RST:
table.junction_char = "+"
table.hrules = RULE_ALL
elif args.format_ == FormatArg.CONFLUENCE:
table.junction_char = "|"
table.hrules = RULE_NONE
elif args.format_ == FormatArg.JSON:
table = JsonPrettyTable(table.field_names)
elif args.format_ == FormatArg.JSON_LICENSE_FINDER:
table = JsonLicenseFinderTable(table.field_names)
elif args.format_ == FormatArg.CSV:
table = CSVPrettyTable(table.field_names)
elif args.format_ == FormatArg.PLAIN_VERTICAL:
table = PlainVerticalTable(table.field_names)
return table
def find_license_from_classifier(classifiers: list[str]) -> list[str]:
licenses = []
for classifier in filter(lambda c: c.startswith("License"), classifiers):
license = classifier.split(" :: ")[-1]
# Through the declaration of 'Classifier: License :: OSI Approved'
if license != "OSI Approved":
licenses.append(license)
return licenses
def select_license_by_source(
from_source: FromArg, license_classifier: list[str], license_meta: str
) -> set[str]:
license_classifier_set = set(license_classifier) or {LICENSE_UNKNOWN}
if (
from_source == FromArg.CLASSIFIER
or from_source == FromArg.MIXED
and len(license_classifier) > 0
):
return license_classifier_set
else:
return {license_meta}
def get_output_fields(args: CustomNamespace) -> list[str]:
if args.summary:
return list(SUMMARY_OUTPUT_FIELDS)
output_fields = list(DEFAULT_OUTPUT_FIELDS)
if args.from_ == FromArg.ALL:
output_fields.append("License-Metadata")
output_fields.append("License-Classifier")
else:
output_fields.append("License")
if args.with_authors:
output_fields.append("Author")
if args.with_urls:
output_fields.append("URL")
if args.with_description:
output_fields.append("Description")
if args.with_license_file:
if not args.no_license_path:
output_fields.append("LicenseFile")
output_fields.append("LicenseText")
if args.with_notice_file:
output_fields.append("NoticeText")
if not args.no_license_path:
output_fields.append("NoticeFile")
return output_fields
def get_sortby(args: CustomNamespace) -> str:
if args.summary and args.order == OrderArg.COUNT:
return "Count"
elif args.summary or args.order == OrderArg.LICENSE:
return "License"
elif args.order == OrderArg.NAME:
return "Name"
elif args.order == OrderArg.AUTHOR and args.with_authors:
return "Author"
elif args.order == OrderArg.URL and args.with_urls:
return "URL"
return "Name"
def create_output_string(args: CustomNamespace) -> str:
output_fields = get_output_fields(args)
if args.summary:
table = create_summary_table(args)
else:
table = create_licenses_table(args, output_fields)
sortby = get_sortby(args)
if args.format_ == FormatArg.HTML:
html = table.get_html_string(fields=output_fields, sortby=sortby)
return html.encode("ascii", errors="xmlcharrefreplace").decode("ascii")
else:
return table.get_string(fields=output_fields, sortby=sortby)
def create_warn_string(args: CustomNamespace) -> str:
warn_messages = []
warn = partial(output_colored, "33")
if args.with_license_file and not args.format_ == FormatArg.JSON:
message = warn(
(
"Due to the length of these fields, this option is "
"best paired with --format=json."
)
)
warn_messages.append(message)
if args.summary and (args.with_authors or args.with_urls):
message = warn(
(
"When using this option, only --order=count or "
"--order=license has an effect for the --order "
"option. And using --with-authors and --with-urls "
"will be ignored."
)
)
warn_messages.append(message)
return "\n".join(warn_messages)
class CustomHelpFormatter(argparse.HelpFormatter): # pragma: no cover
def __init__(
self,
prog: str,
indent_increment: int = 2,
max_help_position: int = 24,
width: Optional[int] = None,
) -> None:
max_help_position = 30
super().__init__(
prog,
indent_increment=indent_increment,
max_help_position=max_help_position,
width=width,
)
def _format_action(self, action: argparse.Action) -> str:
flag_indent_argument: bool = False
text = self._expand_help(action)
separator_pos = text[:3].find("|")
if separator_pos != -1 and "I" in text[:separator_pos]:
self._indent()
flag_indent_argument = True
help_str = super()._format_action(action)
if flag_indent_argument:
self._dedent()
return help_str
def _expand_help(self, action: argparse.Action) -> str:
if isinstance(action.default, Enum):
default_value = enum_key_to_value(action.default)
return cast(str, self._get_help_string(action)) % {
"default": default_value
}
return super()._expand_help(action)
def _split_lines(self, text: str, width: int) -> List[str]:
separator_pos = text[:3].find("|")
if separator_pos != -1:
flag_splitlines: bool = "R" in text[:separator_pos]
text = text[separator_pos + 1:] # fmt: skip
if flag_splitlines:
return text.splitlines()
return super()._split_lines(text, width)
class CustomNamespace(argparse.Namespace):
from_: "FromArg"
order: "OrderArg"
format_: "FormatArg"
summary: bool
output_file: str
ignore_packages: List[str]
packages: List[str]
with_system: bool
with_authors: bool
with_urls: bool
with_description: bool
with_license_file: bool
no_license_path: bool
with_notice_file: bool
filter_strings: bool
filter_code_page: str
fail_on: Optional[str]
allow_only: Optional[str]
class CompatibleArgumentParser(argparse.ArgumentParser):
def parse_args( # type: ignore[override]
self,
args: None | Sequence[str] = None,
namespace: None | CustomNamespace = None,
) -> CustomNamespace:
args_ = cast(CustomNamespace, super().parse_args(args, namespace))
self._verify_args(args_)
return args_
def _verify_args(self, args: CustomNamespace) -> None:
if args.with_license_file is False and (
args.no_license_path is True or args.with_notice_file is True
):
self.error(
"'--no-license-path' and '--with-notice-file' require "
"the '--with-license-file' option to be set"
)
if args.filter_strings is False and args.filter_code_page != "latin1":
self.error(
"'--filter-code-page' requires the '--filter-strings' "
"option to be set"
)
try:
codecs.lookup(args.filter_code_page)
except LookupError:
self.error(
"invalid code page '%s' given for '--filter-code-page, "
"check https://docs.python.org/3/library/codecs.html"
"#standard-encodings for valid code pages"
% args.filter_code_page
)
class NoValueEnum(Enum):
def __repr__(self) -> str: # pragma: no cover
return "<%s.%s>" % (self.__class__.__name__, self.name)
class FromArg(NoValueEnum):
META = M = auto()
CLASSIFIER = C = auto()
MIXED = MIX = auto()
ALL = auto()
class OrderArg(NoValueEnum):
COUNT = C = auto()
LICENSE = L = auto()
NAME = N = auto()
AUTHOR = A = auto()
URL = U = auto()
class FormatArg(NoValueEnum):
PLAIN = P = auto()
PLAIN_VERTICAL = auto()
MARKDOWN = MD = M = auto()
RST = REST = R = auto()
CONFLUENCE = C = auto()
HTML = H = auto()
JSON = J = auto()
JSON_LICENSE_FINDER = JLF = auto()
CSV = auto()
def value_to_enum_key(value: str) -> str:
return value.replace("-", "_").upper()
def enum_key_to_value(enum_key: Enum) -> str:
return enum_key.name.replace("_", "-").lower()
def choices_from_enum(enum_cls: Type[NoValueEnum]) -> List[str]:
return [
key.replace("_", "-").lower() for key in enum_cls.__members__.keys()
]
MAP_DEST_TO_ENUM = {
"from_": FromArg,
"order": OrderArg,
"format_": FormatArg,
}
class SelectAction(argparse.Action):
def __call__( # type: ignore[override]
self,
parser: argparse.ArgumentParser,
namespace: argparse.Namespace,
values: str,
option_string: Optional[str] = None,
) -> None:
enum_cls = MAP_DEST_TO_ENUM[self.dest]
values = value_to_enum_key(values)
setattr(namespace, self.dest, getattr(enum_cls, values))
def create_parser() -> CompatibleArgumentParser:
parser = CompatibleArgumentParser(
description=__summary__, formatter_class=CustomHelpFormatter
)
common_options = parser.add_argument_group("Common options")
format_options = parser.add_argument_group("Format options")
verify_options = parser.add_argument_group("Verify options")
parser.add_argument(
"-v", "--version", action="version", version="%(prog)s " + __version__
)
common_options.add_argument(
"--from",
dest="from_",
action=SelectAction,
type=str,
default=FromArg.MIXED,
metavar="SOURCE",
choices=choices_from_enum(FromArg),
help="R|where to find license information\n"
'"meta", "classifier, "mixed", "all"\n'
"(default: %(default)s)",
)
common_options.add_argument(
"-o",
"--order",
action=SelectAction,
type=str,
default=OrderArg.NAME,
metavar="COL",
choices=choices_from_enum(OrderArg),
help="R|order by column\n"
'"name", "license", "author", "url"\n'
"(default: %(default)s)",
)
common_options.add_argument(
"-f",
"--format",
dest="format_",
action=SelectAction,
type=str,
default=FormatArg.PLAIN,
metavar="STYLE",
choices=choices_from_enum(FormatArg),
help="R|dump as set format style\n"
'"plain", "plain-vertical" "markdown", "rst", \n'
'"confluence", "html", "json", \n'
'"json-license-finder", "csv"\n'
"(default: %(default)s)",
)
common_options.add_argument(
"--summary",
action="store_true",
default=False,
help="dump summary of each license",
)
common_options.add_argument(
"--output-file",
action="store",
type=str,
help="save license list to file",
)
common_options.add_argument(
"-i",
"--ignore-packages",
action="store",
type=str,
nargs="+",
metavar="PKG",
default=[],
help="ignore package name in dumped list",
)
common_options.add_argument(
"-p",
"--packages",
action="store",
type=str,
nargs="+",
metavar="PKG",
default=[],
help="only include selected packages in output",
)
format_options.add_argument(
"-s",
"--with-system",
action="store_true",
default=False,
help="dump with system packages",
)
format_options.add_argument(
"-a",
"--with-authors",
action="store_true",
default=False,
help="dump with package authors",
)
format_options.add_argument(
"-u",
"--with-urls",
action="store_true",
default=False,
help="dump with package urls",
)
format_options.add_argument(
"-d",
"--with-description",
action="store_true",
default=False,
help="dump with short package description",
)
format_options.add_argument(
"-l",
"--with-license-file",
action="store_true",
default=False,
help="dump with location of license file and "
"contents, most useful with JSON output",
)
format_options.add_argument(
"--no-license-path",
action="store_true",
default=False,
help="I|when specified together with option -l, "
"suppress location of license file output",
)
format_options.add_argument(
"--with-notice-file",
action="store_true",
default=False,
help="I|when specified together with option -l, "
"dump with location of license file and contents",
)
format_options.add_argument(
"--filter-strings",
action="store_true",
default=False,
help="filter input according to code page",
)
format_options.add_argument(
"--filter-code-page",
action="store",
type=str,
default="latin1",
metavar="CODE",
help="I|specify code page for filtering " "(default: %(default)s)",
)
verify_options.add_argument(
"--fail-on",
action="store",
type=str,
default=None,
help="fail (exit with code 1) on the first occurrence "
"of the licenses of the semicolon-separated list",
)
verify_options.add_argument(
"--allow-only",
action="store",
type=str,
default=None,
help="fail (exit with code 1) on the first occurrence "
"of the licenses not in the semicolon-separated list",
)
return parser
def output_colored(code: str, text: str, is_bold: bool = False) -> str:
"""
Create function to output with color sequence
"""
if is_bold:
code = "1;%s" % code
return "\033[%sm%s\033[0m" % (code, text)
def save_if_needs(output_file: None | str, output_string: str) -> None:
"""
Save to path given by args
"""
if output_file is None:
return
try:
with open(output_file, "w", encoding="utf-8") as f:
f.write(output_string)
sys.stdout.write("created path: " + output_file + "\n")
sys.exit(0)
except IOError:
sys.stderr.write("check path: --output-file\n")
sys.exit(1)
def main() -> None: # pragma: no cover
parser = create_parser()
args = parser.parse_args()
output_string = create_output_string(args)
output_file = args.output_file
save_if_needs(output_file, output_string)
print(output_string)
warn_string = create_warn_string(args)
if warn_string:
print(warn_string, file=sys.stderr)
if __name__ == "__main__": # pragma: no cover
main()