annotate contrib/undumprevlog @ 45830:c102b704edb5

global: use python3 in shebangs Python 3 is the future. We want Python scripts to be using Python 3 by default. This change updates all `#!/usr/bin/env python` shebangs to use `python3`. Does this mean all scripts use or require Python 3: no. In the test environment, the `PATH` environment variable in tests is updated to guarantee that the Python executable used to run run-tests.py is used. Since test scripts all now use `#!/usr/bin/env python3`, we had to update this code to install a `python3` symlink instead of `python`. It is possible there are some random scripts now executed with the incorrect Python interpreter in some contexts. However, I would argue that this was a pre-existing bug: we should almost always be executing new Python processes using the `sys.executable` from the originating Python script, as `python` or `python3` won't guarantee we'll use the same interpreter. Differential Revision: https://phab.mercurial-scm.org/D9273
author Gregory Szorc <gregory.szorc@gmail.com>
date Fri, 06 Nov 2020 13:58:59 -0800
parents 4c1b4805db57
children 59fa3890d40a
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1 #!/usr/bin/env python3
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2 # Undump a dump from dumprevlog
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3 # $ hg init
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4 # $ undumprevlog < repo.dump
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5
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6 from __future__ import absolute_import, print_function
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7
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8 import sys
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9 from mercurial import (
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10 encoding,
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11 node,
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12 revlog,
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13 transaction,
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14 vfs as vfsmod,
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15 )
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16 from mercurial.utils import procutil
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17
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18 for fp in (sys.stdin, sys.stdout, sys.stderr):
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19 procutil.setbinary(fp)
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20
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21 opener = vfsmod.vfs(b'.', False)
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22 tr = transaction.transaction(
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23 sys.stderr.write, opener, {b'store': opener}, b"undump.journal"
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24 )
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25 while True:
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26 l = sys.stdin.readline()
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27 if not l:
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28 break
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29 if l.startswith("file:"):
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30 f = encoding.strtolocal(l[6:-1])
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31 r = revlog.revlog(opener, f)
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32 procutil.stdout.write(b'%s\n' % f)
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33 elif l.startswith("node:"):
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34 n = node.bin(l[6:-1])
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35 elif l.startswith("linkrev:"):
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36 lr = int(l[9:-1])
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37 elif l.startswith("parents:"):
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38 p = l[9:-1].split()
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39 p1 = node.bin(p[0])
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40 p2 = node.bin(p[1])
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41 elif l.startswith("length:"):
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42 length = int(l[8:-1])
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43 sys.stdin.readline() # start marker
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44 d = encoding.strtolocal(sys.stdin.read(length))
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45 sys.stdin.readline() # end marker
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46 r.addrevision(d, tr, lr, p1, p2)
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47
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48 tr.close()