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comparison mercurial/util.py @ 31577:e7a02e9ad162

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util: enable hardlink for copyfile This patch removes the global variable "allowhardlinks" that disables hardlink in all cases, so hardlink gets enabled if the filesystem type is whitelisted. Third party extensions wanting to enable hardlink support unconditionally can replace "_hardlinkfswhitelist.__contains__".
author Jun Wu <quark@fb.com>
date Sun, 12 Mar 2017 01:03:23 -0800
parents e506e461c7a9
children ae02cc1f5369
comparison
equal deleted inserted replaced
31576:07f0cddb0594 31577:e7a02e9ad162
1053 raise error.SignatureError 1053 raise error.SignatureError
1054 raise 1054 raise
1055 1055
1056 return check 1056 return check
1057 1057
1058 # Hardlinks are problematic on CIFS, do not allow hardlinks
1059 # until we find a way to work around it cleanly (issue4546).
1060 # This is a variable so extensions can opt-in to using them.
1061 allowhardlinks = False
1062
1063 # a whilelist of known filesystems where hardlink works reliably 1058 # a whilelist of known filesystems where hardlink works reliably
1064 _hardlinkfswhitelist = set([ 1059 _hardlinkfswhitelist = set([
1065 'btrfs', 1060 'btrfs',
1066 'ext2', 1061 'ext2',
1067 'ext3', 1062 'ext3',
1093 # unless we are confident that dest is on a whitelisted filesystem. 1088 # unless we are confident that dest is on a whitelisted filesystem.
1094 destdir = os.path.dirname(dest) 1089 destdir = os.path.dirname(dest)
1095 fstype = getattr(osutil, 'getfstype', lambda x: None)(destdir) 1090 fstype = getattr(osutil, 'getfstype', lambda x: None)(destdir)
1096 if fstype not in _hardlinkfswhitelist: 1091 if fstype not in _hardlinkfswhitelist:
1097 hardlink = False 1092 hardlink = False
1098 if allowhardlinks and hardlink: 1093 if hardlink:
1099 try: 1094 try:
1100 oslink(src, dest) 1095 oslink(src, dest)
1101 return 1096 return
1102 except (IOError, OSError): 1097 except (IOError, OSError):
1103 pass # fall back to normal copy 1098 pass # fall back to normal copy