log: make -frREV PATH detect missing files before falling back to slow path
If -rREV isn't specified, "log --follow" would abort on nonexistent paths.
Let's implement this behavior for "-frREV" case as we have ctx.hasdir() now.
Otherwise "log -frREV PATH" would silently fall back to slow path and files
wouldn't be followed across renames.
The loop is quadratic (as before), but the size of the startctxs and
match.files() should be small in general.
Some tests are marked as BROKEN since file renames aren't tracked in the
slow path. This is a known limitation of the current history traversal
function.
# Copyright (c) 2016-present, Gregory Szorc
# All rights reserved.
#
# This software may be modified and distributed under the terms
# of the BSD license. See the LICENSE file for details.
import distutils.ccompiler
import os
from distutils.extension import Extension
zstd_sources = [
"zstd/%s" % p
for p in (
"common/debug.c",
"common/entropy_common.c",
"common/error_private.c",
"common/fse_decompress.c",
"common/pool.c",
"common/threading.c",
"common/xxhash.c",
"common/zstd_common.c",
"compress/fse_compress.c",
"compress/hist.c",
"compress/huf_compress.c",
"compress/zstd_compress_literals.c",
"compress/zstd_compress_sequences.c",
"compress/zstd_compress.c",
"compress/zstd_double_fast.c",
"compress/zstd_fast.c",
"compress/zstd_lazy.c",
"compress/zstd_ldm.c",
"compress/zstd_opt.c",
"compress/zstdmt_compress.c",
"decompress/huf_decompress.c",
"decompress/zstd_ddict.c",
"decompress/zstd_decompress.c",
"decompress/zstd_decompress_block.c",
"dictBuilder/cover.c",
"dictBuilder/divsufsort.c",
"dictBuilder/fastcover.c",
"dictBuilder/zdict.c",
)
]
zstd_sources_legacy = [
"zstd/%s" % p
for p in (
"deprecated/zbuff_common.c",
"deprecated/zbuff_compress.c",
"deprecated/zbuff_decompress.c",
"legacy/zstd_v01.c",
"legacy/zstd_v02.c",
"legacy/zstd_v03.c",
"legacy/zstd_v04.c",
"legacy/zstd_v05.c",
"legacy/zstd_v06.c",
"legacy/zstd_v07.c",
)
]
zstd_includes = [
"zstd",
"zstd/common",
"zstd/compress",
"zstd/decompress",
"zstd/dictBuilder",
]
zstd_includes_legacy = [
"zstd/deprecated",
"zstd/legacy",
]
ext_includes = [
"c-ext",
"zstd/common",
]
ext_sources = [
"zstd/common/error_private.c",
"zstd/common/pool.c",
"zstd/common/threading.c",
"zstd/common/zstd_common.c",
"zstd.c",
"c-ext/bufferutil.c",
"c-ext/compressiondict.c",
"c-ext/compressobj.c",
"c-ext/compressor.c",
"c-ext/compressoriterator.c",
"c-ext/compressionchunker.c",
"c-ext/compressionparams.c",
"c-ext/compressionreader.c",
"c-ext/compressionwriter.c",
"c-ext/constants.c",
"c-ext/decompressobj.c",
"c-ext/decompressor.c",
"c-ext/decompressoriterator.c",
"c-ext/decompressionreader.c",
"c-ext/decompressionwriter.c",
"c-ext/frameparams.c",
]
zstd_depends = [
"c-ext/python-zstandard.h",
]
def get_c_extension(
support_legacy=False,
system_zstd=False,
name="zstd",
warnings_as_errors=False,
root=None,
):
"""Obtain a distutils.extension.Extension for the C extension.
``support_legacy`` controls whether to compile in legacy zstd format support.
``system_zstd`` controls whether to compile against the system zstd library.
For this to work, the system zstd library and headers must match what
python-zstandard is coded against exactly.
``name`` is the module name of the C extension to produce.
``warnings_as_errors`` controls whether compiler warnings are turned into
compiler errors.
``root`` defines a root path that source should be computed as relative
to. This should be the directory with the main ``setup.py`` that is
being invoked. If not defined, paths will be relative to this file.
"""
actual_root = os.path.abspath(os.path.dirname(__file__))
root = root or actual_root
sources = set([os.path.join(actual_root, p) for p in ext_sources])
if not system_zstd:
sources.update([os.path.join(actual_root, p) for p in zstd_sources])
if support_legacy:
sources.update(
[os.path.join(actual_root, p) for p in zstd_sources_legacy]
)
sources = list(sources)
include_dirs = set([os.path.join(actual_root, d) for d in ext_includes])
if not system_zstd:
include_dirs.update(
[os.path.join(actual_root, d) for d in zstd_includes]
)
if support_legacy:
include_dirs.update(
[os.path.join(actual_root, d) for d in zstd_includes_legacy]
)
include_dirs = list(include_dirs)
depends = [os.path.join(actual_root, p) for p in zstd_depends]
compiler = distutils.ccompiler.new_compiler()
# Needed for MSVC.
if hasattr(compiler, "initialize"):
compiler.initialize()
if compiler.compiler_type == "unix":
compiler_type = "unix"
elif compiler.compiler_type == "msvc":
compiler_type = "msvc"
elif compiler.compiler_type == "mingw32":
compiler_type = "mingw32"
else:
raise Exception("unhandled compiler type: %s" % compiler.compiler_type)
extra_args = ["-DZSTD_MULTITHREAD"]
if not system_zstd:
extra_args.append("-DZSTDLIB_VISIBILITY=")
extra_args.append("-DZDICTLIB_VISIBILITY=")
extra_args.append("-DZSTDERRORLIB_VISIBILITY=")
if compiler_type == "unix":
extra_args.append("-fvisibility=hidden")
if not system_zstd and support_legacy:
extra_args.append("-DZSTD_LEGACY_SUPPORT=1")
if warnings_as_errors:
if compiler_type in ("unix", "mingw32"):
extra_args.append("-Werror")
elif compiler_type == "msvc":
extra_args.append("/WX")
else:
assert False
libraries = ["zstd"] if system_zstd else []
# Python 3.7 doesn't like absolute paths. So normalize to relative.
sources = [os.path.relpath(p, root) for p in sources]
include_dirs = [os.path.relpath(p, root) for p in include_dirs]
depends = [os.path.relpath(p, root) for p in depends]
# TODO compile with optimizations.
return Extension(
name,
sources,
include_dirs=include_dirs,
depends=depends,
extra_compile_args=extra_args,
libraries=libraries,
)