From: Eric Wong <e@xxxxxxxxx>
Date: Tue, 1 Sep 2020 07:43:55 +0000
Subject: [PATCH] core.abbrev=no disables abbreviations
These allows users to write hash-agnostic scripts and configs to
disable 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@xxxxxxxxx>
[jc: tweaked implementation, added doc and a test]
Signed-off-by: Junio C Hamano <gitster@xxxxxxxxx>
---
Documentation/config/core.txt | 2 ++
config.c | 2 ++
t/t3200-branch.sh | 2 ++
3 files changed, 6 insertions(+)
diff --git a/Documentation/config/core.txt b/Documentation/config/core.txt
index 160aacad84..c04f62a54a 100644
--- a/Documentation/config/core.txt
+++ b/Documentation/config/core.txt
@@ -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.
diff --git a/config.c b/config.c
index 1137bd73af..4c0cf3a1c1 100644
--- a/config.c
+++ b/config.c
@@ -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)
diff --git a/t/t3200-branch.sh b/t/t3200-branch.sh
index a0b832d59e..67db316911 100755
--- a/t/t3200-branch.sh
+++ b/t/t3200-branch.sh
@@ -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?
--
2.30.0-rc1-197-gdf840da780
