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annotate README @ 31209:dd2364f5180a

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localrepo: handle rename with hardlinks properly In "aftertrans", we rename "journal.*" to "undo.*". We expect "journal.*" files to disappear after renaming. However, if "journal.foo" and "undo.foo" refer to a same file (hardlink), rename may be a no-op, leaving both files on disk, according to Linux manpage [1]: If oldpath and newpath are existing hard links referring to the same file, then rename() does nothing, and returns a suc‐ cess status. The POSIX specification [2] is not very clear about what to do. To be safe, remove "undo.*" before the rename so "journal.*" cannot be left on disk. [1]: http://man7.org/linux/man-pages/man2/rename.2.html [2]: http://pubs.opengroup.org/onlinepubs/9699919799/
author Jun Wu <quark@fb.com>
date Thu, 02 Mar 2017 21:49:30 -0800
parents 4b0fc75f9403
children 76b171209151
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1 Mercurial
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2 =========
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3
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4 Mercurial is a fast, easy to use, distributed revision control tool
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5 for software developers.
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6
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7 Basic install:
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8
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9 $ make # see install targets
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10 $ make install # do a system-wide install
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11 $ hg debuginstall # sanity-check setup
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12 $ hg # see help
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14 Running without installing:
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15
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16 $ make local # build for inplace usage
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17 $ ./hg --version # should show the latest version
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18
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19 See https://mercurial-scm.org/ for detailed installation
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20 instructions, platform-specific notes, and Mercurial user information.