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pyproject-rpm-macros/pyproject_save_files.py
Miro Hrončok be3e9d3b71 Escape weird paths generated by %pyproject_save_files 
Related: rhbz#1950291
2021-08-10 10:51:23 +02:00

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import argparse
import fnmatch
import json
import os
from collections import defaultdict
from pathlib import PosixPath, PurePosixPath
# From RPM's build/files.c strtokWithQuotes delim argument
RPM_FILES_DELIMETERS = ' \n\t'
class BuildrootPath(PurePosixPath):
"""
This path represents a path in a buildroot.
When absolute, it is "relative" to a buildroot.
E.g. /usr/lib means %{buildroot}/usr/lib
The object carries no buildroot information.
"""
@staticmethod
def from_real(realpath, *, root):
"""
For a given real disk path, return a BuildrootPath in the given root.
For example::
>>> BuildrootPath.from_real(PosixPath('/tmp/buildroot/foo'), root=PosixPath('/tmp/buildroot'))
BuildrootPath('/foo')
"""
return BuildrootPath("/") / realpath.relative_to(root)
def to_real(self, root):
"""
Return a real PosixPath in the given root
For example::
>>> BuildrootPath('/foo').to_real(PosixPath('/tmp/buildroot'))
PosixPath('/tmp/buildroot/foo')
"""
return root / self.relative_to("/")
def normpath(self):
"""
Normalize all the potential /../ parts of the path without touching real files.
PurePaths don't have .resolve().
Paths have .resolve() but it touches real files.
This is an alternative. It assumes there are no symbolic links.
Example:
>>> BuildrootPath('/usr/lib/python/../pypy').normpath()
BuildrootPath('/usr/lib/pypy')
"""
return type(self)(os.path.normpath(self))
def pycache_dir(script):
"""
For a script BuildrootPath, return a BuildrootPath of its __pycache__ directory.
Example:
>>> pycache_dir(BuildrootPath('/whatever/bar.py'))
BuildrootPath('/whatever/__pycache__')
>>> pycache_dir(BuildrootPath('/opt/python3.10/foo.py'))
BuildrootPath('/opt/python3.10/__pycache__')
"""
return script.parent / "__pycache__"
def pycached(script, python_version):
"""
For a script BuildrootPath, return a list with that path and its bytecode glob.
Like the %pycached macro.
The glob is represented as a BuildrootPath.
Examples:
>>> pycached(BuildrootPath('/whatever/bar.py'), '3.8')
[BuildrootPath('/whatever/bar.py'), BuildrootPath('/whatever/__pycache__/bar.cpython-38{,.opt-?}.pyc')]
>>> pycached(BuildrootPath('/opt/python3.10/foo.py'), '3.10')
[BuildrootPath('/opt/python3.10/foo.py'), BuildrootPath('/opt/python3.10/__pycache__/foo.cpython-310{,.opt-?}.pyc')]
"""
assert script.suffix == ".py"
pyver = "".join(python_version.split(".")[:2])
pycname = f"{script.stem}.cpython-{pyver}{{,.opt-?}}.pyc"
pyc = pycache_dir(script) / pycname
return [script, pyc]
def add_file_to_module(paths, module_name, module_type, files_dirs, *files):
"""
Helper procedure, adds given files to the module_name of a given module_type
"""
for module in paths["modules"][module_name]:
if module["type"] == module_type:
if files[0] not in module[files_dirs]:
module[files_dirs].extend(files)
break
else:
paths["modules"][module_name].append(
{"type": module_type, "files": [], "dirs": [], files_dirs: list(files)}
)
def add_py_file_to_module(paths, module_name, module_type, path, python_version,
*, include_pycache_dir):
"""
Helper procedure, adds given .py file to the module_name of a given module_type
Always also adds the bytecode cache.
If include_pycache_dir is set, also include the __pycache__ directory.
"""
add_file_to_module(paths, module_name, module_type, "files", *pycached(path, python_version))
if include_pycache_dir:
add_file_to_module(paths, module_name, module_type, "dirs", pycache_dir(path))
def add_lang_to_module(paths, module_name, path):
"""
Helper procedure, divides lang files by language and adds them to the module_name
Returns True if the language code detection was successful
"""
for i, parent in enumerate(path.parents):
if i > 0 and parent.name == 'locale':
lang_country_code = path.parents[i-1].name
break
else:
return False
# convert potential en_US to plain en
lang_code = lang_country_code.partition('_')[0]
if module_name not in paths["lang"]:
paths["lang"].update({module_name: defaultdict(list)})
paths["lang"][module_name][lang_code].append(path)
return True
def classify_paths(
record_path, parsed_record_content, sitedirs, python_version
):
"""
For each BuildrootPath in parsed_record_content classify it to a dict structure
that allows to filter the files for the %files section easier.
For the dict structure, look at the beginning of this function's code.
Each "module" is a dict with "type" ("package", "script", "extension"), and "files" and "dirs".
"""
distinfo = record_path.parent
paths = {
"metadata": {
"files": [], # regular %file entries with dist-info content
"dirs": [distinfo], # %dir %file entries with dist-info directory
"docs": [], # to be used once there is upstream way to recognize READMEs
"licenses": [], # to be used once there is upstream way to recognize LICENSEs
},
"lang": {}, # %lang entries: [module_name or None][language_code] lists of .mo files
"modules": defaultdict(list), # each importable module (directory, .py, .so)
"other": {"files": []}, # regular %file entries we could not parse :(
}
# In RECORDs generated by pip, there are no directories, only files.
# The example RECORD from PEP 376 does not contain directories either.
# Hence, we'll only assume files, but TODO get it officially documented.
for path in parsed_record_content:
if path.suffix == ".pyc":
# we handle bytecode separately
continue
if path.parent == distinfo:
if path.name in ("RECORD", "REQUESTED"):
# RECORD and REQUESTED files are removed in %pyproject_install
# See PEP 627
continue
# TODO is this a license/documentation?
paths["metadata"]["files"].append(path)
continue
for sitedir in sitedirs:
if sitedir in path.parents:
if path.parent == sitedir:
if path.suffix == ".so":
# extension modules can have 2 suffixes
name = BuildrootPath(path.stem).stem
add_file_to_module(paths, name, "extension", "files", path)
elif path.suffix == ".py":
name = path.stem
# we add the .pyc files, but not top-level __pycache__
add_py_file_to_module(
paths, name, "script", path, python_version,
include_pycache_dir=False
)
else:
paths["other"]["files"].append(path)
else:
# this file is inside a dir, we add all dirs upwards until sitedir
index = path.parents.index(sitedir)
module_dir = path.parents[index - 1]
for parent in list(path.parents)[:index]: # no direct slice until Python 3.10
add_file_to_module(paths, module_dir.name, "package", "dirs", parent)
is_lang = False
if path.suffix == ".mo":
is_lang = add_lang_to_module(paths, module_dir.name, path)
if not is_lang:
if path.suffix == ".py":
# we add the .pyc files, and their __pycache__
add_py_file_to_module(
paths, module_dir.name, "package", path, python_version,
include_pycache_dir=True
)
else:
add_file_to_module(paths, module_dir.name, "package", "files", path)
break
else:
if path.suffix == ".mo":
add_lang_to_module(paths, None, path) or paths["other"]["files"].append(path)
else:
paths["other"]["files"].append(path)
return paths
def escape_rpm_path(path):
"""
Escape special characters in string-paths or BuildrootPaths
E.g. a space in path otherwise makes RPM think it's multiple paths,
unless we put it in "quotes".
Or a literal % symbol in path might be expanded as a macro if not escaped.
Due to limitations in RPM, paths with spaces and double quotes are not supported.
Examples:
>>> escape_rpm_path(BuildrootPath('/usr/lib/python3.9/site-packages/setuptools'))
'/usr/lib/python3.9/site-packages/setuptools'
>>> escape_rpm_path('/usr/lib/python3.9/site-packages/setuptools/script (dev).tmpl')
'"/usr/lib/python3.9/site-packages/setuptools/script (dev).tmpl"'
>>> escape_rpm_path('/usr/share/data/100%valid.path')
'/usr/share/data/100%%%%%%%%valid.path'
>>> escape_rpm_path('/usr/share/data/100 % valid.path')
'"/usr/share/data/100 %%%%%%%% valid.path"'
>>> escape_rpm_path('/usr/share/data/1000 %% valid.path')
'"/usr/share/data/1000 %%%%%%%%%%%%%%%% valid.path"'
>>> escape_rpm_path('/usr/share/data/spaces and "quotes"')
Traceback (most recent call last):
...
NotImplementedError: ...
"""
orig_path = path = str(path)
if "%" in path:
# Escaping by 8 %s has been verified in RPM 4.16 and 4.17, but probably not stable
# See this thread http://lists.rpm.org/pipermail/rpm-list/2021-June/002048.html
# On the CI, we build tests/escape_percentages.spec to verify this assumption
path = path.replace("%", "%" * 8)
if any(symbol in path for symbol in RPM_FILES_DELIMETERS):
if '"' in path:
# As far as we know, RPM cannot list such file individually
# See this thread http://lists.rpm.org/pipermail/rpm-list/2021-June/002048.html
raise NotImplementedError(f'" symbol in path with spaces is not supported by %pyproject_save_files: {orig_path!r}')
return f'"{path}"'
return path
def generate_file_list(paths_dict, module_globs, include_others=False):
"""
This function takes the classified paths_dict and turns it into lines
for the %files section. Returns list with text lines, no Path objects.
Only includes files from modules that match module_globs, metadata and
optionaly all other files.
It asserts that all globs match at least one module, raises ValueError otherwise.
Multiple globs matching identical module(s) are OK.
"""
files = set()
if include_others:
files.update(f"{escape_rpm_path(p)}" for p in paths_dict["other"]["files"])
try:
for lang_code in paths_dict["lang"][None]:
files.update(f"%lang({lang_code}) {escape_rpm_path(p)}" for p in paths_dict["lang"][None][lang_code])
except KeyError:
pass
files.update(f"{escape_rpm_path(p)}" for p in paths_dict["metadata"]["files"])
for macro in "dir", "doc", "license":
files.update(f"%{macro} {escape_rpm_path(p)}" for p in paths_dict["metadata"][f"{macro}s"])
modules = paths_dict["modules"]
done_modules = set()
done_globs = set()
for glob in module_globs:
for name in modules:
if fnmatch.fnmatchcase(name, glob):
if name not in done_modules:
try:
for lang_code in paths_dict["lang"][name]:
files.update(f"%lang({lang_code}) {escape_rpm_path(p)}" for p in paths_dict["lang"][name][lang_code])
except KeyError:
pass
for module in modules[name]:
files.update(f"%dir {escape_rpm_path(p)}" for p in module["dirs"])
files.update(f"{escape_rpm_path(p)}" for p in module["files"])
done_modules.add(name)
done_globs.add(glob)
missed = module_globs - done_globs
if missed:
missed_text = ", ".join(sorted(missed))
raise ValueError(f"Globs did not match any module: {missed_text}")
return sorted(files)
def parse_varargs(varargs):
"""
Parse varargs from the %pyproject_save_files macro
Arguments starting with + are treated as a flags, everything else is a glob
Returns as set of globs, boolean flag whether to include all the other files
Raises ValueError for unknown flags and globs with dots (namespace packages).
Good examples:
>>> parse_varargs(['*'])
({'*'}, False)
>>> mods, auto = parse_varargs(['requests*', 'kerberos', '+auto'])
>>> auto
True
>>> sorted(mods)
['kerberos', 'requests*']
>>> mods, auto = parse_varargs(['tldr', 'tensorf*'])
>>> auto
False
>>> sorted(mods)
['tensorf*', 'tldr']
>>> parse_varargs(['+auto'])
(set(), True)
Bad examples:
>>> parse_varargs(['+kinkdir'])
Traceback (most recent call last):
...
ValueError: Invalid argument: +kinkdir
>>> parse_varargs(['good', '+bad', '*ugly*'])
Traceback (most recent call last):
...
ValueError: Invalid argument: +bad
>>> parse_varargs(['+bad', 'my.bad'])
Traceback (most recent call last):
...
ValueError: Invalid argument: +bad
>>> parse_varargs(['mod', 'mod.*'])
Traceback (most recent call last):
...
ValueError: Attempted to use a namespaced package with dot in the glob: mod.*. ...
>>> parse_varargs(['my.bad', '+bad'])
Traceback (most recent call last):
...
ValueError: Attempted to use a namespaced package with dot in the glob: my.bad. ...
"""
include_auto = False
globs = set()
for arg in varargs:
if arg.startswith("+"):
if arg == "+auto":
include_auto = True
else:
raise ValueError(f"Invalid argument: {arg}")
elif "." in arg:
top, *_ = arg.partition(".")
msg = (
f"Attempted to use a namespaced package with dot in the glob: {arg}. "
f"That is not (yet) supported. Use {top} instead and/or file a Bugzilla explaining your use case."
)
raise ValueError(msg)
else:
globs.add(arg)
return globs, include_auto
def load_parsed_record(pyproject_record):
parsed_record = {}
with open(pyproject_record) as pyproject_record_file:
content = json.load(pyproject_record_file)
if len(content) > 1:
raise FileExistsError("%pyproject install has found more than one *.dist-info/RECORD file. "
"Currently, %pyproject_save_files supports only one wheel → one file list mapping. "
"Feel free to open a bugzilla for pyproject-rpm-macros and describe your usecase.")
# Redefine strings stored in JSON to BuildRootPaths
for record_path, files in content.items():
parsed_record[BuildrootPath(record_path)] = [BuildrootPath(f) for f in files]
return parsed_record
def pyproject_save_files(buildroot, sitelib, sitearch, python_version, pyproject_record, varargs):
"""
Takes arguments from the %{pyproject_save_files} macro
Returns list of paths for the %files section
"""
# On 32 bit architectures, sitelib equals to sitearch
# This saves us browsing one directory twice
sitedirs = sorted({sitelib, sitearch})
globs, include_auto = parse_varargs(varargs)
parsed_records = load_parsed_record(pyproject_record)
final_file_list = []
for record_path, files in parsed_records.items():
paths_dict = classify_paths(
record_path, files, sitedirs, python_version
)
final_file_list.extend(
generate_file_list(paths_dict, globs, include_auto)
)
return final_file_list
def main(cli_args):
file_section = pyproject_save_files(
cli_args.buildroot,
cli_args.sitelib,
cli_args.sitearch,
cli_args.python_version,
cli_args.pyproject_record,
cli_args.varargs,
)
cli_args.output.write_text("\n".join(file_section) + "\n", encoding="utf-8")
def argparser():
parser = argparse.ArgumentParser()
r = parser.add_argument_group("required arguments")
r.add_argument("--output", type=PosixPath, required=True)
r.add_argument("--buildroot", type=PosixPath, required=True)
r.add_argument("--sitelib", type=BuildrootPath, required=True)
r.add_argument("--sitearch", type=BuildrootPath, required=True)
r.add_argument("--python-version", type=str, required=True)
r.add_argument("--pyproject-record", type=PosixPath, required=True)
parser.add_argument("varargs", nargs="+")
return parser
if __name__ == "__main__":
cli_args = argparser().parse_args()
main(cli_args)
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