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core.abbrev=no disables abbreviations 

This allows users to write hash-agnostic scripts and configs by
disabling abbreviations.  Using "-c core.abbrev=40" will be
insufficient with SHA-256, and "-c core.abbrev=64" won't work with
SHA-1 repos today.

Signed-off-by: Eric Wong <e@80x24.org>
[jc: tweaked implementation, added doc and a test]
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Eric Wong 2020-09-01 07:43:55 +00:00 committed by Junio C Hamano
parent e197136389
commit a9ecaa06a7
3 changed files with 6 additions and 0 deletions
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2
Documentation/config/core.txt
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@ -625,4 +625,6 @@ core.abbrev::
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.
If set to "no", no abbreviation is made and the object names
are shown in their full length.
The minimum length is 4.

2
config.c
View File

@ -1217,6 +1217,8 @@ static int git_default_core_config(const char *var, const char *value, void *cb)
return config_error_nonbool(var);
if (!strcasecmp(value, "auto"))
default_abbrev = -1;
else if (!git_parse_maybe_bool_text(value))
default_abbrev = the_hash_algo->hexsz;
else {
int abbrev = git_config_int(var, value);
if (abbrev < minimum_abbrev || abbrev > the_hash_algo->hexsz)

2
t/t3200-branch.sh
View File

@ -305,7 +305,9 @@ test_expect_success 'git branch --list -v with --abbrev' '
git branch -v --list --no-abbrev t >actual.noabbrev &&
git branch -v --list --abbrev=0 t >actual.0abbrev &&
git -c core.abbrev=no branch -v --list t >actual.noabbrev-conf &&
test_cmp actual.noabbrev actual.0abbrev &&
test_cmp actual.noabbrev actual.noabbrev-conf &&
git branch -v --list --abbrev=36 t >actual.36abbrev &&
# how many hexdigits are used?