diff --git a/swh/model/from_disk.py b/swh/model/from_disk.py index 64a6ef7..45c60ca 100644 --- a/swh/model/from_disk.py +++ b/swh/model/from_disk.py @@ -1,351 +1,385 @@ # Copyright (C) 2017-2018 The Software Heritage developers # See the AUTHORS file at the top-level directory of this distribution # License: GNU General Public License version 3, or any later version # See top-level LICENSE file for more information import enum import os import stat from typing import List from .hashutil import MultiHash, HASH_BLOCK_SIZE from .merkle import MerkleLeaf, MerkleNode from .identifiers import ( directory_identifier, identifier_to_bytes as id_to_bytes, identifier_to_str as id_to_str, ) class DentryPerms(enum.IntEnum): """Admissible permissions for directory entries.""" content = 0o100644 """Content""" executable_content = 0o100755 """Executable content (e.g. executable script)""" symlink = 0o120000 """Symbolic link""" directory = 0o040000 """Directory""" revision = 0o160000 """Revision (e.g. submodule)""" def mode_to_perms(mode): """Convert a file mode to a permission compatible with Software Heritage directory entries Args: mode (int): a file mode as returned by :func:`os.stat` in :attr:`os.stat_result.st_mode` Returns: DentryPerms: one of the following values: :const:`DentryPerms.content`: plain file :const:`DentryPerms.executable_content`: executable file :const:`DentryPerms.symlink`: symbolic link :const:`DentryPerms.directory`: directory """ if stat.S_ISLNK(mode): return DentryPerms.symlink if stat.S_ISDIR(mode): return DentryPerms.directory else: # file is executable in any way if mode & (0o111): return DentryPerms.executable_content else: return DentryPerms.content class Content(MerkleLeaf): """Representation of a Software Heritage content as a node in a Merkle tree. The current Merkle hash for the Content nodes is the `sha1_git`, which makes it consistent with what :class:`Directory` uses for its own hash computation. """ __slots__ = [] # type: List[str] type = 'content' @classmethod def from_bytes(cls, *, mode, data): """Convert data (raw :class:`bytes`) to a Software Heritage content entry Args: mode (int): a file mode (passed to :func:`mode_to_perms`) data (bytes): raw contents of the file """ ret = MultiHash.from_data(data).digest() ret['length'] = len(data) ret['perms'] = mode_to_perms(mode) ret['data'] = data + ret['status'] = 'visible' return cls(ret) @classmethod def from_symlink(cls, *, path, mode): """Convert a symbolic link to a Software Heritage content entry""" return cls.from_bytes(mode=mode, data=os.readlink(path)) @classmethod - def from_file(cls, *, path, data=False, save_path=False): + def from_file( + cls, *, path, data=False, save_path=False, + max_content_length=None): """Compute the Software Heritage content entry corresponding to an on-disk file. The returned dictionary contains keys useful for both: - loading the content in the archive (hashes, `length`) - using the content as a directory entry in a directory Args: path (bytes): path to the file for which we're computing the content entry data (bool): add the file data to the entry save_path (bool): add the file path to the entry + max_content_length (Optional[int]): if given, all contents larger + than this will be skipped. """ file_stat = os.lstat(path) mode = file_stat.st_mode + length = file_stat.st_size + too_large = max_content_length is not None \ + and length > max_content_length if stat.S_ISLNK(mode): # Symbolic link: return a file whose contents are the link target + + if too_large: + # Unlike large contents, we can't stream symlinks to + # MultiHash, and we don't want to fit them in memory if + # they exceed max_content_length either. + # Thankfully, this should not happen for reasonable values of + # max_content_length because of OS/filesystem limitations, + # so let's just raise an error. + raise Exception(f'Symlink too large ({length} bytes)') + return cls.from_symlink(path=path, mode=mode) elif not stat.S_ISREG(mode): # not a regular file: return the empty file instead return cls.from_bytes(mode=mode, data=b'') - length = file_stat.st_size + if too_large: + skip_reason = 'Content too large' + elif not data: + skip_reason = 'Skipping file content' + else: + skip_reason = None - if not data: - ret = MultiHash.from_path(path).digest() + if skip_reason: + ret = { + **MultiHash.from_path(path).digest(), + 'status': 'absent', + 'reason': skip_reason, + } else: h = MultiHash(length=length) chunks = [] with open(path, 'rb') as fobj: while True: chunk = fobj.read(HASH_BLOCK_SIZE) if not chunk: break h.update(chunk) chunks.append(chunk) - ret = h.digest() - ret['data'] = b''.join(chunks) + ret = { + **h.digest(), + 'status': 'visible', + 'data': b''.join(chunks), + } if save_path: ret['path'] = path ret['perms'] = mode_to_perms(mode) ret['length'] = length obj = cls(ret) return obj def __repr__(self): return 'Content(id=%s)' % id_to_str(self.hash) def compute_hash(self): return self.data['sha1_git'] def accept_all_directories(dirname, entries): """Default filter for :func:`Directory.from_disk` accepting all directories Args: dirname (bytes): directory name entries (list): directory entries """ return True def ignore_empty_directories(dirname, entries): """Filter for :func:`directory_to_objects` ignoring empty directories Args: dirname (bytes): directory name entries (list): directory entries Returns: True if the directory is not empty, false if the directory is empty """ return bool(entries) def ignore_named_directories(names, *, case_sensitive=True): """Filter for :func:`directory_to_objects` to ignore directories named one of names. Args: names (list of bytes): names to ignore case_sensitive (bool): whether to do the filtering in a case sensitive way Returns: a directory filter for :func:`directory_to_objects` """ if not case_sensitive: names = [name.lower() for name in names] def named_filter(dirname, entries, names=names, case_sensitive=case_sensitive): if case_sensitive: return dirname not in names else: return dirname.lower() not in names return named_filter class Directory(MerkleNode): """Representation of a Software Heritage directory as a node in a Merkle Tree. This class can be used to generate, from an on-disk directory, all the objects that need to be sent to the Software Heritage archive. The :func:`from_disk` constructor allows you to generate the data structure from a directory on disk. The resulting :class:`Directory` can then be manipulated as a dictionary, using the path as key. The :func:`collect` method is used to retrieve all the objects that need to be added to the Software Heritage archive since the last collection, by class (contents and directories). When using the dict-like methods to update the contents of the directory, the affected levels of hierarchy are reset and can be collected again using the same method. This enables the efficient collection of updated nodes, for instance when the client is applying diffs. """ __slots__ = ['__entries'] type = 'directory' @classmethod def from_disk(cls, *, path, data=False, save_path=False, - dir_filter=accept_all_directories): + dir_filter=accept_all_directories, + max_content_length=None): """Compute the Software Heritage objects for a given directory tree Args: path (bytes): the directory to traverse data (bool): whether to add the data to the content objects save_path (bool): whether to add the path to the content objects dir_filter (function): a filter to ignore some directories by name or contents. Takes two arguments: dirname and entries, and returns True if the directory should be added, False if the directory should be ignored. + max_content_length (Optional[int]): if given, all contents larger + than this will be skipped. """ top_path = path dirs = {} for root, dentries, fentries in os.walk(top_path, topdown=False): entries = {} # Join fentries and dentries in the same processing, as symbolic # links to directories appear in dentries... for name in fentries + dentries: path = os.path.join(root, name) if not os.path.isdir(path) or os.path.islink(path): - content = Content.from_file(path=path, data=data, - save_path=save_path) + content = Content.from_file( + path=path, data=data, save_path=save_path, + max_content_length=max_content_length) entries[name] = content else: if dir_filter(name, dirs[path].entries): entries[name] = dirs[path] dirs[root] = cls({'name': os.path.basename(root)}) dirs[root].update(entries) return dirs[top_path] def __init__(self, data=None): super().__init__(data=data) self.__entries = None def invalidate_hash(self): self.__entries = None super().invalidate_hash() @staticmethod def child_to_directory_entry(name, child): if isinstance(child, Directory): return { 'type': 'dir', 'perms': DentryPerms.directory, 'target': child.hash, 'name': name, } elif isinstance(child, Content): return { 'type': 'file', 'perms': child.data['perms'], 'target': child.hash, 'name': name, } else: raise ValueError('unknown child') def get_data(self, **kwargs): return { 'id': self.hash, 'entries': self.entries, } @property def entries(self): if self.__entries is None: self.__entries = [ self.child_to_directory_entry(name, child) for name, child in self.items() ] return self.__entries def compute_hash(self): return id_to_bytes(directory_identifier({'entries': self.entries})) def __getitem__(self, key): if not isinstance(key, bytes): raise ValueError('Can only get a bytes from Directory') # Convenience shortcut if key == b'': return self if b'/' not in key: return super().__getitem__(key) else: key1, key2 = key.split(b'/', 1) return self.__getitem__(key1)[key2] def __setitem__(self, key, value): if not isinstance(key, bytes): raise ValueError('Can only set a bytes Directory entry') if not isinstance(value, (Content, Directory)): raise ValueError('Can only set a Directory entry to a Content or ' 'Directory') if key == b'': raise ValueError('Directory entry must have a name') if b'\x00' in key: raise ValueError('Directory entry name must not contain nul bytes') if b'/' not in key: return super().__setitem__(key, value) else: key1, key2 = key.rsplit(b'/', 1) self[key1].__setitem__(key2, value) def __delitem__(self, key): if not isinstance(key, bytes): raise ValueError('Can only delete a bytes Directory entry') if b'/' not in key: super().__delitem__(key) else: key1, key2 = key.rsplit(b'/', 1) del self[key1][key2] def __repr__(self): return 'Directory(id=%s, entries=[%s])' % ( id_to_str(self.hash), ', '.join(str(entry) for entry in self), ) diff --git a/swh/model/tests/test_from_disk.py b/swh/model/tests/test_from_disk.py index 7b21d20..1c74737 100644 --- a/swh/model/tests/test_from_disk.py +++ b/swh/model/tests/test_from_disk.py @@ -1,788 +1,832 @@ # Copyright (C) 2017 The Software Heritage developers # See the AUTHORS file at the top-level directory of this distribution # License: GNU General Public License version 3, or any later version # See top-level LICENSE file for more information import os import pytest import tarfile import tempfile import unittest from typing import ClassVar, Optional from swh.model import from_disk from swh.model.from_disk import Content, DentryPerms, Directory from swh.model.hashutil import DEFAULT_ALGORITHMS, hash_to_bytes, hash_to_hex TEST_DATA = os.path.join(os.path.dirname(__file__), 'data') class ModeToPerms(unittest.TestCase): def setUp(self): super().setUp() # Generate a full permissions map self.perms_map = {} # Symlinks for i in range(0o120000, 0o127777 + 1): self.perms_map[i] = DentryPerms.symlink # Directories for i in range(0o040000, 0o047777 + 1): self.perms_map[i] = DentryPerms.directory # Other file types: socket, regular file, block device, character # device, fifo all map to regular files for ft in [0o140000, 0o100000, 0o060000, 0o020000, 0o010000]: for i in range(ft, ft + 0o7777 + 1): if i & 0o111: # executable bits are set self.perms_map[i] = DentryPerms.executable_content else: self.perms_map[i] = DentryPerms.content def test_exhaustive_mode_to_perms(self): for fmode, perm in self.perms_map.items(): self.assertEqual(perm, from_disk.mode_to_perms(fmode)) class DataMixin: maxDiff = None # type: ClassVar[Optional[int]] def setUp(self): self.tmpdir = tempfile.TemporaryDirectory( prefix='swh.model.from_disk' ) self.tmpdir_name = os.fsencode(self.tmpdir.name) self.contents = { b'file': { 'data': b'42\n', 'sha1': hash_to_bytes( '34973274ccef6ab4dfaaf86599792fa9c3fe4689' ), 'sha256': hash_to_bytes( '084c799cd551dd1d8d5c5f9a5d593b2e' '931f5e36122ee5c793c1d08a19839cc0' ), 'sha1_git': hash_to_bytes( 'd81cc0710eb6cf9efd5b920a8453e1e07157b6cd'), 'blake2s256': hash_to_bytes( 'd5fe1939576527e42cfd76a9455a2432' 'fe7f56669564577dd93c4280e76d661d' ), 'length': 3, 'mode': 0o100644 }, } self.symlinks = { b'symlink': { 'data': b'target', 'blake2s256': hash_to_bytes( '595d221b30fdd8e10e2fdf18376e688e' '9f18d56fd9b6d1eb6a822f8c146c6da6' ), 'sha1': hash_to_bytes( '0e8a3ad980ec179856012b7eecf4327e99cd44cd' ), 'sha1_git': hash_to_bytes( '1de565933b05f74c75ff9a6520af5f9f8a5a2f1d' ), 'sha256': hash_to_bytes( '34a04005bcaf206eec990bd9637d9fdb' '6725e0a0c0d4aebf003f17f4c956eb5c' ), 'length': 6, 'perms': DentryPerms.symlink, } } self.specials = { b'fifo': os.mkfifo, b'devnull': lambda path: os.mknod(path, device=os.makedev(1, 3)), } self.empty_content = { 'data': b'', 'length': 0, 'blake2s256': hash_to_bytes( '69217a3079908094e11121d042354a7c' '1f55b6482ca1a51e1b250dfd1ed0eef9' ), 'sha1': hash_to_bytes( 'da39a3ee5e6b4b0d3255bfef95601890afd80709' ), 'sha1_git': hash_to_bytes( 'e69de29bb2d1d6434b8b29ae775ad8c2e48c5391' ), 'sha256': hash_to_bytes( 'e3b0c44298fc1c149afbf4c8996fb924' '27ae41e4649b934ca495991b7852b855' ), 'perms': DentryPerms.content, } self.empty_directory = { 'id': hash_to_bytes( '4b825dc642cb6eb9a060e54bf8d69288fbee4904' ), 'entries': [], } # Generated with generate_testdata_from_disk self.tarball_contents = { b'': { 'entries': [{ 'name': b'bar', 'perms': DentryPerms.directory, 'target': hash_to_bytes( '3c1f578394f4623f74a0ba7fe761729f59fc6ec4' ), 'type': 'dir', }, { 'name': b'empty-folder', 'perms': DentryPerms.directory, 'target': hash_to_bytes( '4b825dc642cb6eb9a060e54bf8d69288fbee4904' ), 'type': 'dir', }, { 'name': b'foo', 'perms': DentryPerms.directory, 'target': hash_to_bytes( '2b41c40f0d1fbffcba12497db71fba83fcca96e5' ), 'type': 'dir', }, { 'name': b'link-to-another-quote', 'perms': DentryPerms.symlink, 'target': hash_to_bytes( '7d5c08111e21c8a9f71540939998551683375fad' ), 'type': 'file', }, { 'name': b'link-to-binary', 'perms': DentryPerms.symlink, 'target': hash_to_bytes( 'e86b45e538d9b6888c969c89fbd22a85aa0e0366' ), 'type': 'file', }, { 'name': b'link-to-foo', 'perms': DentryPerms.symlink, 'target': hash_to_bytes( '19102815663d23f8b75a47e7a01965dcdc96468c' ), 'type': 'file', }, { 'name': b'some-binary', 'perms': DentryPerms.executable_content, 'target': hash_to_bytes( '68769579c3eaadbe555379b9c3538e6628bae1eb' ), 'type': 'file', }], 'id': hash_to_bytes( 'e8b0f1466af8608c8a3fb9879db172b887e80759' ), }, b'bar': { 'entries': [{ 'name': b'barfoo', 'perms': DentryPerms.directory, 'target': hash_to_bytes( 'c3020f6bf135a38c6df3afeb5fb38232c5e07087' ), 'type': 'dir', }], 'id': hash_to_bytes( '3c1f578394f4623f74a0ba7fe761729f59fc6ec4' ), }, b'bar/barfoo': { 'entries': [{ 'name': b'another-quote.org', 'perms': DentryPerms.content, 'target': hash_to_bytes( '133693b125bad2b4ac318535b84901ebb1f6b638' ), 'type': 'file', }], 'id': hash_to_bytes( 'c3020f6bf135a38c6df3afeb5fb38232c5e07087' ), }, b'bar/barfoo/another-quote.org': { 'blake2s256': hash_to_bytes( 'd26c1cad82d43df0bffa5e7be11a60e3' '4adb85a218b433cbce5278b10b954fe8' ), 'length': 72, 'perms': DentryPerms.content, 'sha1': hash_to_bytes( '90a6138ba59915261e179948386aa1cc2aa9220a' ), 'sha1_git': hash_to_bytes( '133693b125bad2b4ac318535b84901ebb1f6b638' ), 'sha256': hash_to_bytes( '3db5ae168055bcd93a4d08285dc99ffe' 'e2883303b23fac5eab850273a8ea5546' ), }, b'empty-folder': { 'entries': [], 'id': hash_to_bytes( '4b825dc642cb6eb9a060e54bf8d69288fbee4904' ), }, b'foo': { 'entries': [{ 'name': b'barfoo', 'perms': DentryPerms.symlink, 'target': hash_to_bytes( '8185dfb2c0c2c597d16f75a8a0c37668567c3d7e' ), 'type': 'file', }, { 'name': b'quotes.md', 'perms': DentryPerms.content, 'target': hash_to_bytes( '7c4c57ba9ff496ad179b8f65b1d286edbda34c9a' ), 'type': 'file', }, { 'name': b'rel-link-to-barfoo', 'perms': DentryPerms.symlink, 'target': hash_to_bytes( 'acac326ddd63b0bc70840659d4ac43619484e69f' ), 'type': 'file', }], 'id': hash_to_bytes( '2b41c40f0d1fbffcba12497db71fba83fcca96e5' ), }, b'foo/barfoo': { 'blake2s256': hash_to_bytes( 'e1252f2caa4a72653c4efd9af871b62b' 'f2abb7bb2f1b0e95969204bd8a70d4cd' ), 'data': b'bar/barfoo', 'length': 10, 'perms': DentryPerms.symlink, 'sha1': hash_to_bytes( '9057ee6d0162506e01c4d9d5459a7add1fedac37' ), 'sha1_git': hash_to_bytes( '8185dfb2c0c2c597d16f75a8a0c37668567c3d7e' ), 'sha256': hash_to_bytes( '29ad3f5725321b940332c78e403601af' 'ff61daea85e9c80b4a7063b6887ead68' ), }, b'foo/quotes.md': { 'blake2s256': hash_to_bytes( 'bf7ce4fe304378651ee6348d3e9336ed' '5ad603d33e83c83ba4e14b46f9b8a80b' ), 'length': 66, 'perms': DentryPerms.content, 'sha1': hash_to_bytes( '1bf0bb721ac92c18a19b13c0eb3d741cbfadebfc' ), 'sha1_git': hash_to_bytes( '7c4c57ba9ff496ad179b8f65b1d286edbda34c9a' ), 'sha256': hash_to_bytes( 'caca942aeda7b308859eb56f909ec96d' '07a499491690c453f73b9800a93b1659' ), }, b'foo/rel-link-to-barfoo': { 'blake2s256': hash_to_bytes( 'd9c327421588a1cf61f316615005a2e9' 'c13ac3a4e96d43a24138d718fa0e30db' ), 'data': b'../bar/barfoo', 'length': 13, 'perms': DentryPerms.symlink, 'sha1': hash_to_bytes( 'dc51221d308f3aeb2754db48391b85687c2869f4' ), 'sha1_git': hash_to_bytes( 'acac326ddd63b0bc70840659d4ac43619484e69f' ), 'sha256': hash_to_bytes( '8007d20db2af40435f42ddef4b8ad76b' '80adbec26b249fdf0473353f8d99df08' ), }, b'link-to-another-quote': { 'blake2s256': hash_to_bytes( '2d0e73cea01ba949c1022dc10c8a43e6' '6180639662e5dc2737b843382f7b1910' ), 'data': b'bar/barfoo/another-quote.org', 'length': 28, 'perms': DentryPerms.symlink, 'sha1': hash_to_bytes( 'cbeed15e79599c90de7383f420fed7acb48ea171' ), 'sha1_git': hash_to_bytes( '7d5c08111e21c8a9f71540939998551683375fad' ), 'sha256': hash_to_bytes( 'e6e17d0793aa750a0440eb9ad5b80b25' '8076637ef0fb68f3ac2e59e4b9ac3ba6' ), }, b'link-to-binary': { 'blake2s256': hash_to_bytes( '9ce18b1adecb33f891ca36664da676e1' '2c772cc193778aac9a137b8dc5834b9b' ), 'data': b'some-binary', 'length': 11, 'perms': DentryPerms.symlink, 'sha1': hash_to_bytes( 'd0248714948b3a48a25438232a6f99f0318f59f1' ), 'sha1_git': hash_to_bytes( 'e86b45e538d9b6888c969c89fbd22a85aa0e0366' ), 'sha256': hash_to_bytes( '14126e97d83f7d261c5a6889cee73619' '770ff09e40c5498685aba745be882eff' ), }, b'link-to-foo': { 'blake2s256': hash_to_bytes( '08d6cad88075de8f192db097573d0e82' '9411cd91eb6ec65e8fc16c017edfdb74' ), 'data': b'foo', 'length': 3, 'perms': DentryPerms.symlink, 'sha1': hash_to_bytes( '0beec7b5ea3f0fdbc95d0dd47f3c5bc275da8a33' ), 'sha1_git': hash_to_bytes( '19102815663d23f8b75a47e7a01965dcdc96468c' ), 'sha256': hash_to_bytes( '2c26b46b68ffc68ff99b453c1d304134' '13422d706483bfa0f98a5e886266e7ae' ), }, b'some-binary': { 'blake2s256': hash_to_bytes( '922e0f7015035212495b090c27577357' 'a740ddd77b0b9e0cd23b5480c07a18c6' ), 'length': 5, 'perms': DentryPerms.executable_content, 'sha1': hash_to_bytes( '0bbc12d7f4a2a15b143da84617d95cb223c9b23c' ), 'sha1_git': hash_to_bytes( '68769579c3eaadbe555379b9c3538e6628bae1eb' ), 'sha256': hash_to_bytes( 'bac650d34a7638bb0aeb5342646d24e3' 'b9ad6b44c9b383621faa482b990a367d' ), }, } def tearDown(self): self.tmpdir.cleanup() def assertContentEqual(self, left, right, *, check_data=False, # noqa check_path=False): if not isinstance(left, Content): raise ValueError('%s is not a Content' % left) if isinstance(right, Content): right = right.get_data() keys = DEFAULT_ALGORITHMS | { 'length', 'perms', } if check_data: keys |= {'data'} if check_path: keys |= {'path'} failed = [] for key in keys: try: lvalue = left.data[key] if key == 'perms' and 'perms' not in right: rvalue = from_disk.mode_to_perms(right['mode']) else: rvalue = right[key] except KeyError: failed.append(key) continue if lvalue != rvalue: failed.append(key) if failed: raise self.failureException( 'Content mismatched:\n' + '\n'.join( 'content[%s] = %r != %r' % ( key, left.data.get(key), right.get(key)) for key in failed ) ) def assertDirectoryEqual(self, left, right): # NoQA if not isinstance(left, Directory): raise ValueError('%s is not a Directory' % left) if isinstance(right, Directory): right = right.get_data() return self.assertCountEqual(left.entries, right['entries']) def make_contents(self, directory): for filename, content in self.contents.items(): path = os.path.join(directory, filename) with open(path, 'wb') as f: f.write(content['data']) os.chmod(path, content['mode']) def make_symlinks(self, directory): for filename, symlink in self.symlinks.items(): path = os.path.join(directory, filename) os.symlink(symlink['data'], path) def make_specials(self, directory): for filename, fn in self.specials.items(): path = os.path.join(directory, filename) fn(path) def make_from_tarball(self, directory): tarball = os.path.join(TEST_DATA, 'dir-folders', 'sample-folder.tgz') with tarfile.open(tarball, 'r:gz') as f: f.extractall(os.fsdecode(directory)) class TestContent(DataMixin, unittest.TestCase): def setUp(self): super().setUp() def test_data_to_content(self): for filename, content in self.contents.items(): conv_content = Content.from_bytes(mode=content['mode'], data=content['data']) self.assertContentEqual(conv_content, content) self.assertIn(hash_to_hex(conv_content.hash), repr(conv_content)) class SymlinkToContent(DataMixin, unittest.TestCase): def setUp(self): super().setUp() self.make_symlinks(self.tmpdir_name) def test_symlink_to_content(self): for filename, symlink in self.symlinks.items(): path = os.path.join(self.tmpdir_name, filename) perms = 0o120000 conv_content = Content.from_symlink(path=path, mode=perms) self.assertContentEqual(conv_content, symlink) class FileToContent(DataMixin, unittest.TestCase): def setUp(self): super().setUp() self.make_contents(self.tmpdir_name) self.make_symlinks(self.tmpdir_name) self.make_specials(self.tmpdir_name) def test_file_to_content(self): # Check whether loading the data works for data in [True, False]: for filename, symlink in self.symlinks.items(): path = os.path.join(self.tmpdir_name, filename) conv_content = Content.from_file(path=path, data=data) self.assertContentEqual(conv_content, symlink, check_data=data) for filename, content in self.contents.items(): path = os.path.join(self.tmpdir_name, filename) conv_content = Content.from_file(path=path, data=data) self.assertContentEqual(conv_content, content, check_data=data) for filename in self.specials: path = os.path.join(self.tmpdir_name, filename) conv_content = Content.from_file(path=path, data=data) self.assertContentEqual(conv_content, self.empty_content) + def test_symlink_max_length(self): + for max_content_length in [4, 10]: + for filename, symlink in self.symlinks.items(): + path = os.path.join(self.tmpdir_name, filename) + content = Content.from_file(path=path, data=True) + if content.data['length'] > max_content_length: + with pytest.raises(Exception, match='too large'): + Content.from_file( + path=path, data=True, + max_content_length=max_content_length) + else: + limited_content = Content.from_file( + path=path, data=True, + max_content_length=max_content_length) + assert content == limited_content + + def test_file_max_length(self): + for max_content_length in [2, 4]: + for filename, content in self.contents.items(): + path = os.path.join(self.tmpdir_name, filename) + content = Content.from_file(path=path, data=True) + limited_content = Content.from_file( + path=path, data=True, + max_content_length=max_content_length) + assert content.data['length'] == limited_content.data['length'] + assert content.data['status'] == 'visible' + if content.data['length'] > max_content_length: + assert limited_content.data['status'] == 'absent' + assert limited_content.data['reason'] \ + == 'Content too large' + else: + assert limited_content.data['status'] == 'visible' + assert limited_content.data['data'] == content.data['data'] + + def test_special_file_max_length(self): + for max_content_length in [None, 0, 1]: + for filename in self.specials: + path = os.path.join(self.tmpdir_name, filename) + content = Content.from_file(path=path, data=True) + limited_content = Content.from_file( + path=path, data=True, + max_content_length=max_content_length) + assert limited_content == content + def test_file_to_content_with_path(self): for filename, content in self.contents.items(): content_w_path = content.copy() path = os.path.join(self.tmpdir_name, filename) content_w_path['path'] = path conv_content = Content.from_file(path=path, save_path=True) self.assertContentEqual(conv_content, content_w_path, check_path=True) class DirectoryToObjects(DataMixin, unittest.TestCase): def setUp(self): super().setUp() contents = os.path.join(self.tmpdir_name, b'contents') os.mkdir(contents) self.make_contents(contents) symlinks = os.path.join(self.tmpdir_name, b'symlinks') os.mkdir(symlinks) self.make_symlinks(symlinks) specials = os.path.join(self.tmpdir_name, b'specials') os.mkdir(specials) self.make_specials(specials) empties = os.path.join(self.tmpdir_name, b'empty1', b'empty2') os.makedirs(empties) def test_directory_to_objects(self): directory = Directory.from_disk(path=self.tmpdir_name) for name, value in self.contents.items(): self.assertContentEqual(directory[b'contents/' + name], value) for name, value in self.symlinks.items(): self.assertContentEqual(directory[b'symlinks/' + name], value) for name in self.specials: self.assertContentEqual( directory[b'specials/' + name], self.empty_content, ) self.assertEqual( directory[b'empty1/empty2'].get_data(), self.empty_directory, ) # Raise on non existent file with self.assertRaisesRegex(KeyError, "b'nonexistent'"): directory[b'empty1/nonexistent'] # Raise on non existent directory with self.assertRaisesRegex(KeyError, "b'nonexistentdir'"): directory[b'nonexistentdir/file'] objs = directory.collect() self.assertCountEqual(['content', 'directory'], objs) self.assertEqual(len(objs['directory']), 6) self.assertEqual(len(objs['content']), len(self.contents) + len(self.symlinks) + 1) def test_directory_to_objects_ignore_empty(self): directory = Directory.from_disk( path=self.tmpdir_name, dir_filter=from_disk.ignore_empty_directories ) for name, value in self.contents.items(): self.assertContentEqual(directory[b'contents/' + name], value) for name, value in self.symlinks.items(): self.assertContentEqual(directory[b'symlinks/' + name], value) for name in self.specials: self.assertContentEqual( directory[b'specials/' + name], self.empty_content, ) # empty directories have been ignored recursively with self.assertRaisesRegex(KeyError, "b'empty1'"): directory[b'empty1'] with self.assertRaisesRegex(KeyError, "b'empty1'"): directory[b'empty1/empty2'] objs = directory.collect() self.assertCountEqual(['content', 'directory'], objs) self.assertEqual(len(objs['directory']), 4) self.assertEqual(len(objs['content']), len(self.contents) + len(self.symlinks) + 1) def test_directory_to_objects_ignore_name(self): directory = Directory.from_disk( path=self.tmpdir_name, dir_filter=from_disk.ignore_named_directories([b'symlinks']) ) for name, value in self.contents.items(): self.assertContentEqual(directory[b'contents/' + name], value) for name in self.specials: self.assertContentEqual( directory[b'specials/' + name], self.empty_content, ) self.assertEqual( directory[b'empty1/empty2'].get_data(), self.empty_directory, ) with self.assertRaisesRegex(KeyError, "b'symlinks'"): directory[b'symlinks'] objs = directory.collect() self.assertCountEqual(['content', 'directory'], objs) self.assertEqual(len(objs['directory']), 5) self.assertEqual(len(objs['content']), len(self.contents) + 1) def test_directory_to_objects_ignore_name_case(self): directory = Directory.from_disk( path=self.tmpdir_name, dir_filter=from_disk.ignore_named_directories([b'symLiNks'], case_sensitive=False) ) for name, value in self.contents.items(): self.assertContentEqual(directory[b'contents/' + name], value) for name in self.specials: self.assertContentEqual( directory[b'specials/' + name], self.empty_content, ) self.assertEqual( directory[b'empty1/empty2'].get_data(), self.empty_directory, ) with self.assertRaisesRegex(KeyError, "b'symlinks'"): directory[b'symlinks'] objs = directory.collect() self.assertCountEqual(['content', 'directory'], objs) self.assertEqual(len(objs['directory']), 5) self.assertEqual(len(objs['content']), len(self.contents) + 1) @pytest.mark.fs class TarballTest(DataMixin, unittest.TestCase): def setUp(self): super().setUp() self.make_from_tarball(self.tmpdir_name) def test_contents_match(self): directory = Directory.from_disk( path=os.path.join(self.tmpdir_name, b'sample-folder') ) for name, data in self.tarball_contents.items(): obj = directory[name] if isinstance(obj, Content): self.assertContentEqual(obj, data) elif isinstance(obj, Directory): self.assertDirectoryEqual(obj, data) else: raise self.failureException('Unknown type for %s' % obj) class DirectoryManipulation(DataMixin, unittest.TestCase): def test_directory_access_nested(self): d = Directory() d[b'a'] = Directory() d[b'a/b'] = Directory() self.assertEqual(d[b'a/b'].get_data(), self.empty_directory) def test_directory_del_nested(self): d = Directory() d[b'a'] = Directory() d[b'a/b'] = Directory() with self.assertRaisesRegex(KeyError, "b'c'"): del d[b'a/b/c'] with self.assertRaisesRegex(KeyError, "b'level2'"): del d[b'a/level2/c'] del d[b'a/b'] self.assertEqual(d[b'a'].get_data(), self.empty_directory) def test_directory_access_self(self): d = Directory() self.assertIs(d, d[b'']) self.assertIs(d, d[b'/']) self.assertIs(d, d[b'//']) def test_directory_access_wrong_type(self): d = Directory() with self.assertRaisesRegex(ValueError, 'bytes from Directory'): d['foo'] with self.assertRaisesRegex(ValueError, 'bytes from Directory'): d[42] def test_directory_repr(self): entries = [b'a', b'b', b'c'] d = Directory() for entry in entries: d[entry] = Directory() r = repr(d) self.assertIn(hash_to_hex(d.hash), r) for entry in entries: self.assertIn(str(entry), r) def test_directory_set_wrong_type_name(self): d = Directory() with self.assertRaisesRegex(ValueError, 'bytes Directory entry'): d['foo'] = Directory() with self.assertRaisesRegex(ValueError, 'bytes Directory entry'): d[42] = Directory() def test_directory_set_nul_in_name(self): d = Directory() with self.assertRaisesRegex(ValueError, 'nul bytes'): d[b'\x00\x01'] = Directory() def test_directory_set_empty_name(self): d = Directory() with self.assertRaisesRegex(ValueError, 'must have a name'): d[b''] = Directory() with self.assertRaisesRegex(ValueError, 'must have a name'): d[b'/'] = Directory() def test_directory_set_wrong_type(self): d = Directory() with self.assertRaisesRegex(ValueError, 'Content or Directory'): d[b'entry'] = object() def test_directory_del_wrong_type(self): d = Directory() with self.assertRaisesRegex(ValueError, 'bytes Directory entry'): del d['foo'] with self.assertRaisesRegex(ValueError, 'bytes Directory entry'): del d[42]