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831e61f80f
It is an implementation detail that a new tag is created by adding a file in the .git/refs/tags directory. The only thing the user needs to know is that a "git tag" creates a ref in the refs/tags namespace, and without "-f", it does not overwrite an existing tag. Inspired by a report from 乙酸鋰 <ch3cooli@gmail.com>; I think I caught all the existing mention in Documentation/ directory in the tip of 1.7.9.X maintenance track, but we may have added new ones since then. Signed-off-by: Junio C Hamano <gitster@pobox.com>
84 lines
2.3 KiB
Text
84 lines
2.3 KiB
Text
git-replace(1)
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==============
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NAME
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----
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git-replace - Create, list, delete refs to replace objects
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SYNOPSIS
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--------
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[verse]
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'git replace' [-f] <object> <replacement>
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'git replace' -d <object>...
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'git replace' -l [<pattern>]
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DESCRIPTION
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-----------
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Adds a 'replace' reference in `refs/replace/` namespace.
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The name of the 'replace' reference is the SHA1 of the object that is
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replaced. The content of the 'replace' reference is the SHA1 of the
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replacement object.
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Unless `-f` is given, the 'replace' reference must not yet exist.
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Replacement references will be used by default by all git commands
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except those doing reachability traversal (prune, pack transfer and
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fsck).
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It is possible to disable use of replacement references for any
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command using the `--no-replace-objects` option just after 'git'.
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For example if commit 'foo' has been replaced by commit 'bar':
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------------------------------------------------
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$ git --no-replace-objects cat-file commit foo
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------------------------------------------------
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shows information about commit 'foo', while:
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------------------------------------------------
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$ git cat-file commit foo
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------------------------------------------------
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shows information about commit 'bar'.
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The 'GIT_NO_REPLACE_OBJECTS' environment variable can be set to
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achieve the same effect as the `--no-replace-objects` option.
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OPTIONS
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-------
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-f::
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If an existing replace ref for the same object exists, it will
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be overwritten (instead of failing).
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-d::
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Delete existing replace refs for the given objects.
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-l <pattern>::
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List replace refs for objects that match the given pattern (or
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all if no pattern is given).
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Typing "git replace" without arguments, also lists all replace
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refs.
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BUGS
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----
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Comparing blobs or trees that have been replaced with those that
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replace them will not work properly. And using `git reset --hard` to
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go back to a replaced commit will move the branch to the replacement
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commit instead of the replaced commit.
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There may be other problems when using 'git rev-list' related to
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pending objects. And of course things may break if an object of one
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type is replaced by an object of another type (for example a blob
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replaced by a commit).
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SEE ALSO
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--------
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linkgit:git-tag[1]
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linkgit:git-branch[1]
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linkgit:git[1]
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GIT
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---
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Part of the linkgit:git[1] suite
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