Mercurial > hg
annotate hgext/censor.py @ 49151:1b6e381521c5 stable
doc: use an absolute path in sys.path to work around a python DLL loading bug
This bug[1] was causing the zstd entry under "Available Compression Engines" to
be omitted from the documentation for some versions of python3. I could
upgrade, but past upgrades have broken venvs and clobbered installed packages.
It's a trivial workaround, so there's no sense in leaving this subtle issue. It
was flushed out by changing the module policy here from 'allow' to 'c', and
seeing this error:
ImportError: DLL load failed while importing parsers: The parameter is incorrect.
[1] https://github.com/python/cpython/issues/87271
Differential Revision: https://phab.mercurial-scm.org/D12599
author | Matt Harbison <matt_harbison@yahoo.com> |
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date | Mon, 02 May 2022 22:04:59 -0400 |
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1 # Copyright (C) 2015 - Mike Edgar <adgar@google.com> |
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2 # |
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3 # This extension enables removal of file content at a given revision, |
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4 # rewriting the data/metadata of successive revisions to preserve revision log |
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5 # integrity. |
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6 |
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7 """erase file content at a given revision |
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8 |
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9 The censor command instructs Mercurial to erase all content of a file at a given |
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10 revision *without updating the changeset hash.* This allows existing history to |
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11 remain valid while preventing future clones/pulls from receiving the erased |
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12 data. |
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13 |
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14 Typical uses for censor are due to security or legal requirements, including:: |
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15 |
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16 * Passwords, private keys, cryptographic material |
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17 * Licensed data/code/libraries for which the license has expired |
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18 * Personally Identifiable Information or other private data |
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19 |
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20 Censored nodes can interrupt mercurial's typical operation whenever the excised |
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21 data needs to be materialized. Some commands, like ``hg cat``/``hg revert``, |
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22 simply fail when asked to produce censored data. Others, like ``hg verify`` and |
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23 ``hg update``, must be capable of tolerating censored data to continue to |
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24 function in a meaningful way. Such commands only tolerate censored file |
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25 revisions if they are allowed by the "censor.policy=ignore" config option. |
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26 |
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27 A few informative commands such as ``hg grep`` will unconditionally |
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28 ignore censored data and merely report that it was encountered. |
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29 """ |
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30 |
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31 from __future__ import absolute_import |
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32 |
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33 from mercurial.i18n import _ |
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34 from mercurial.node import short |
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35 |
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36 from mercurial import ( |
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37 error, |
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38 logcmdutil, |
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39 registrar, |
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40 scmutil, |
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41 ) |
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42 |
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43 cmdtable = {} |
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44 command = registrar.command(cmdtable) |
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45 # Note for extension authors: ONLY specify testedwith = 'ships-with-hg-core' for |
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46 # extensions which SHIP WITH MERCURIAL. Non-mainline extensions should |
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47 # be specifying the version(s) of Mercurial they are tested with, or |
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48 # leave the attribute unspecified. |
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49 testedwith = b'ships-with-hg-core' |
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50 |
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51 |
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52 @command( |
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53 b'censor', |
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54 [ |
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55 ( |
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56 b'r', |
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57 b'rev', |
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58 b'', |
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59 _(b'censor file from specified revision'), |
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60 _(b'REV'), |
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61 ), |
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62 (b't', b'tombstone', b'', _(b'replacement tombstone data'), _(b'TEXT')), |
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63 ], |
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64 _(b'-r REV [-t TEXT] [FILE]'), |
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65 helpcategory=command.CATEGORY_MAINTENANCE, |
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66 ) |
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67 def censor(ui, repo, path, rev=b'', tombstone=b'', **opts): |
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68 with repo.wlock(), repo.lock(): |
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69 return _docensor(ui, repo, path, rev, tombstone, **opts) |
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70 |
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71 |
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72 def _docensor(ui, repo, path, rev=b'', tombstone=b'', **opts): |
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73 if not path: |
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74 raise error.Abort(_(b'must specify file path to censor')) |
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75 if not rev: |
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76 raise error.Abort(_(b'must specify revision to censor')) |
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77 |
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78 wctx = repo[None] |
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79 |
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80 m = scmutil.match(wctx, (path,)) |
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81 if m.anypats() or len(m.files()) != 1: |
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82 raise error.Abort(_(b'can only specify an explicit filename')) |
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83 path = m.files()[0] |
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84 flog = repo.file(path) |
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85 if not len(flog): |
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86 raise error.Abort(_(b'cannot censor file with no history')) |
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87 |
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88 rev = logcmdutil.revsingle(repo, rev, rev).rev() |
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89 try: |
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90 ctx = repo[rev] |
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91 except KeyError: |
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92 raise error.Abort(_(b'invalid revision identifier %s') % rev) |
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93 |
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94 try: |
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95 fctx = ctx.filectx(path) |
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96 except error.LookupError: |
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97 raise error.Abort(_(b'file does not exist at revision %s') % rev) |
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98 |
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99 fnode = fctx.filenode() |
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100 heads = [] |
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101 for headnode in repo.heads(): |
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102 hc = repo[headnode] |
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103 if path in hc and hc.filenode(path) == fnode: |
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104 heads.append(hc) |
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105 if heads: |
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106 headlist = b', '.join([short(c.node()) for c in heads]) |
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107 raise error.Abort( |
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108 _(b'cannot censor file in heads (%s)') % headlist, |
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109 hint=_(b'clean/delete and commit first'), |
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110 ) |
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111 |
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112 wp = wctx.parents() |
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113 if ctx.node() in [p.node() for p in wp]: |
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114 raise error.Abort( |
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115 _(b'cannot censor working directory'), |
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116 hint=_(b'clean/delete/update first'), |
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117 ) |
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118 |
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119 with repo.transaction(b'censor') as tr: |
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120 flog.censorrevision(tr, fnode, tombstone=tombstone) |