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annotate mercurial/help/diffs.txt @ 15063:c20688b7c061 stable

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setdiscovery: fix hang when #heads>200 (issue2971) When setting up the next sample, we always add all of the heads, regardless of the desired max sample size. But if the number of heads exceeds this size, then we don't add any more nodes from the still undecided set. (This is debatable per se, and I'll investigate it, but it's how we designed it at the moment.) The bug was that we always added the overall heads, not the heads of the remaining undecided set. Thus, if #heads>200 (desired sample size), we did not make progress any longer.
author Peter Arrenbrecht <peter.arrenbrecht@gmail.com>
date Thu, 25 Aug 2011 21:25:14 +0200
parents ebfc46929f3e
children
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1 Mercurial's default format for showing changes between two versions of
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2 a file is compatible with the unified format of GNU diff, which can be
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3 used by GNU patch and many other standard tools.
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5 While this standard format is often enough, it does not encode the
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6 following information:
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8 - executable status and other permission bits
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9 - copy or rename information
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10 - changes in binary files
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11 - creation or deletion of empty files
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13 Mercurial also supports the extended diff format from the git VCS
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14 which addresses these limitations. The git diff format is not produced
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15 by default because a few widespread tools still do not understand this
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16 format.
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18 This means that when generating diffs from a Mercurial repository
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19 (e.g. with :hg:`export`), you should be careful about things like file
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20 copies and renames or other things mentioned above, because when
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21 applying a standard diff to a different repository, this extra
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22 information is lost. Mercurial's internal operations (like push and
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23 pull) are not affected by this, because they use an internal binary
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24 format for communicating changes.
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26 To make Mercurial produce the git extended diff format, use the --git
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27 option available for many commands, or set 'git = True' in the [diff]
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28 section of your configuration file. You do not need to set this option
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29 when importing diffs in this format or using them in the mq extension.