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comparison mercurial/util.py @ 26267:eca468b8fae4

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compression: use 'None' for no-compression This seems more idiomatic and clearer. We still support both None and 'UN' for now because no user are migrated.
author Pierre-Yves David <pierre-yves.david@fb.com>
date Tue, 15 Sep 2015 17:53:28 -0700
parents 1e042e31bd0c
children 60dd8e3977f0
comparison
equal deleted inserted replaced
26266:1e042e31bd0c 26267:eca468b8fae4
2347 return x 2347 return x
2348 def flush(self): 2348 def flush(self):
2349 return "" 2349 return ""
2350 2350
2351 compressors = { 2351 compressors = {
2352 'UN': nocompress, 2352 None: nocompress,
2353 # lambda to prevent early import 2353 # lambda to prevent early import
2354 'BZ': lambda: bz2.BZ2Compressor(), 2354 'BZ': lambda: bz2.BZ2Compressor(),
2355 'GZ': lambda: zlib.compressobj(), 2355 'GZ': lambda: zlib.compressobj(),
2356 } 2356 }
2357 # also support the old form by courtesies
2358 compressors['UN'] = compressors[None]
2357 2359
2358 def _makedecompressor(decompcls): 2360 def _makedecompressor(decompcls):
2359 def generator(f): 2361 def generator(f):
2360 d = decompcls() 2362 d = decompcls()
2361 for chunk in filechunkiter(f): 2363 for chunk in filechunkiter(f):
2369 # Bzip2 stream start with BZ, but we stripped it. 2371 # Bzip2 stream start with BZ, but we stripped it.
2370 # we put it back for good measure. 2372 # we put it back for good measure.
2371 d.decompress('BZ') 2373 d.decompress('BZ')
2372 return d 2374 return d
2373 2375
2374 decompressors = {'UN': lambda fh: fh, 2376 decompressors = {None: lambda fh: fh,
2375 'BZ': _makedecompressor(_bz2), 2377 'BZ': _makedecompressor(_bz2),
2376 'GZ': _makedecompressor(lambda: zlib.decompressobj()), 2378 'GZ': _makedecompressor(lambda: zlib.decompressobj()),
2377 } 2379 }
2380 # also support the old form by courtesies
2381 decompressors['UN'] = decompressors[None]
2378 2382
2379 # convenient shortcut 2383 # convenient shortcut
2380 dst = debugstacktrace 2384 dst = debugstacktrace