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体验新版 GitCode,发现更多精彩内容 >>
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3a45f625
编写于
9月 18, 2005
作者:
J
Junio C Hamano
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Document extended SHA1 used by git-rev-parse.
Signed-off-by:
N
Junio C Hamano
<
junkio@cox.net
>
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Documentation/git-rev-parse.txt
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@@ -76,6 +76,40 @@ OPTIONS
Flags and parameters to be parsed.
SPECIFYING REVISIONS
--------------------
A revision parameter typically names a commit object. They use
what is called an 'extended SHA1' syntax.
* The full SHA1 object name (40-byte hexadecimal string), or
a substring of such that is unique within the repository.
E.g. dae86e1950b1277e545cee180551750029cfe735 and dae86e both
name the same commit object if there are no other object in
your repository whose object name starts with dae86e.
* A symbolic ref name. E.g. 'master' typically means the commit
object referenced by $GIT_DIR/refs/heads/master. If you
happen to have both heads/master and tags/master, you can
explicitly say 'heads/master' to tell GIT which one you mean.
* A suffix '^' to a revision parameter means the first parent of
that commit object. '^<n>' means the <n>th parent (i.e. 'rev^'
is equivalent to 'rev^1'). As a special rule,
'rev^0' means the commit itself and is used when 'rev' is the
object name of a tag object that refers to a commit object.
* A suffix '~<n>' to a revision parameter means the commit
object that is the <n>th generation grand-parent of the named
commit object, following only the first parent. I.e. rev~3 is
equivalent to rev^^^ which is equivalent to rev^1^1^1.
'git-rev-parse' also accepts a prefix '^' to revision parameter,
which is passed to 'git-rev-list'. Two revision parameters
concatenated with '..' is a short-hand for writing a range
between them. I.e. 'r1..r2' is equivalent to saying '^r1 r2'
Author
------
Written by Linus Torvalds <torvalds@osdl.org> and
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