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config.abbrev: document the new default that auto-scales

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We somehow forgot to update the "default is 7" in the
documentation.  Also give a way to explicitly ask the auto-scaling
by setting config.abbrev to "auto".

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano 2016-11-01 18:34:07 -07:00
parent be5a750939
commit 48d5014dd4
2 changed files with 15 additions and 8 deletions
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9
Documentation/config.txt
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@ -783,10 +783,11 @@ core.sparseCheckout::
linkgit:git-read-tree[1] for more information.
core.abbrev::
Set the length object names are abbreviated to. If unspecified,
many commands abbreviate to 7 hexdigits, which may not be enough
for abbreviated object names to stay unique for sufficiently long
time.
Set the length object names are abbreviated to. If
unspecified or set to "auto", an appropriate value is
computed based on the approximate number of packed objects
in your repository, which hopefully is enough for
abbreviated object names to stay unique for some time.
add.ignoreErrors::
add.ignore-errors (deprecated)::

14
config.c
View File

@ -834,10 +834,16 @@ static int git_default_core_config(const char *var, const char *value)
}
if (!strcmp(var, "core.abbrev")) {
int abbrev = git_config_int(var, value);
if (abbrev < minimum_abbrev || abbrev > 40)
return -1;
default_abbrev = abbrev;
if (!value)
return config_error_nonbool(var);
if (!strcasecmp(value, "auto"))
default_abbrev = -1;
else {
int abbrev = git_config_int(var, value);
if (abbrev < minimum_abbrev || abbrev > 40)
return error("abbrev length out of range: %d", abbrev);
default_abbrev = abbrev;
}
return 0;
}