Mercurial > cpython-lru_cache-weakref

annotate Mac/Lib/macostools.py @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 3f6d261654ca
children 43054021bb57
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1 """macostools - Various utility functions for MacOS.
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2
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3 mkalias(src, dst) - Create a finder alias 'dst' pointing to 'src'
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4 copy(src, dst) - Full copy of 'src' to 'dst'
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5 """
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6
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7 import macfs
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8 import Res
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9 import os
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10 from MACFS import *
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11 import MacOS
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12 import time
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13 try:
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14 openrf = MacOS.openrf
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15 except AttributeError:
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16 # Backward compatability
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17 openrf = open
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18
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19 Error = 'macostools.Error'
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20
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21 FSSpecType = type(macfs.FSSpec(':'))
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22
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23 BUFSIZ=0x80000 # Copy in 0.5Mb chunks
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24
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25 #
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26 # Not guaranteed to be correct or stay correct (Apple doesn't tell you
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27 # how to do this), but it seems to work.
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28 #
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29 def mkalias(src, dst):
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30 """Create a finder alias"""
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31 srcfss = macfs.FSSpec(src)
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32 dstfss = macfs.FSSpec(dst)
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33 alias = srcfss.NewAlias()
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34 srcfinfo = srcfss.GetFInfo()
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35
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36 Res.FSpCreateResFile(dstfss, srcfinfo.Creator, srcfinfo.Type, -1)
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37 h = Res.FSpOpenResFile(dstfss, 3)
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38 resource = Res.Resource(alias.data)
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39 resource.AddResource('alis', 0, '')
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40 Res.CloseResFile(h)
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41
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42 dstfinfo = dstfss.GetFInfo()
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43 dstfinfo.Flags = dstfinfo.Flags|0x8000 # Alias flag
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44 dstfss.SetFInfo(dstfinfo)
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45
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46 def mkdirs(dst):
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47 """Make directories leading to 'dst' if they don't exist yet"""
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48 if dst == '' or os.path.exists(dst):
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49 return
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50 head, tail = os.path.split(dst)
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51 if not ':' in head:
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52 head = head + ':'
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53 mkdirs(head)
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54 os.mkdir(dst, 0777)
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55
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56 def touched(dst):
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57 """Tell the finder a file has changed"""
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58 file_fss = macfs.FSSpec(dst)
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59 vRefNum, dirID, name = file_fss.as_tuple()
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60 dir_fss = macfs.FSSpec((vRefNum, dirID, ''))
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61 crdate, moddate, bkdate = dir_fss.GetDates()
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62 now = time.time()
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63 if now == moddate:
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64 now = now + 1
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65 dir_fss.SetDates(crdate, now, bkdate)
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66
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67 def copy(src, dst, createpath=0, copydates=1):
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68 """Copy a file, including finder info, resource fork, etc"""
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69 if createpath:
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70 mkdirs(os.path.split(dst)[0])
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71 srcfss = macfs.FSSpec(src)
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72 dstfss = macfs.FSSpec(dst)
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73
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74 ifp = open(srcfss.as_pathname(), 'rb')
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75 ofp = open(dstfss.as_pathname(), 'wb')
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76 d = ifp.read(BUFSIZ)
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77 while d:
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78 ofp.write(d)
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79 d = ifp.read(BUFSIZ)
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80 ifp.close()
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81 ofp.close()
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82
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83 ifp = openrf(srcfss.as_pathname(), '*rb')
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84 ofp = openrf(dstfss.as_pathname(), '*wb')
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85 d = ifp.read(BUFSIZ)
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86 while d:
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87 ofp.write(d)
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88 d = ifp.read(BUFSIZ)
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89 ifp.close()
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90 ofp.close()
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91
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92 sf = srcfss.GetFInfo()
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93 df = dstfss.GetFInfo()
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94 df.Creator, df.Type = sf.Creator, sf.Type
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95 df.Flags = (sf.Flags & (kIsStationary|kNameLocked|kHasBundle|kIsInvisible|kIsAlias))
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96 dstfss.SetFInfo(df)
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97 if copydates:
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98 crdate, mddate, bkdate = srcfss.GetDates()
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99 dstfss.SetDates(crdate, mddate, bkdate)
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100 touched(dstfss)
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101
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102 def copytree(src, dst, copydates=1):
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103 """Copy a complete file tree to a new destination"""
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104 if os.path.isdir(src):
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105 mkdirs(dst)
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106 files = os.listdir(src)
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107 for f in files:
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108 copytree(os.path.join(src, f), os.path.join(dst, f), copydates)
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109 else:
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110 copy(src, dst, 1, copydates)