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-rw-r--r--Documentation/git-describe.txt14
1 files changed, 9 insertions, 5 deletions
diff --git a/Documentation/git-describe.txt b/Documentation/git-describe.txt
index a88f6ae..c6a79c2 100644
--- a/Documentation/git-describe.txt
+++ b/Documentation/git-describe.txt
@@ -63,9 +63,10 @@ OPTIONS
Automatically implies --tags.
--abbrev=<n>::
- Instead of using the default 7 hexadecimal digits as the
- abbreviated object name, use <n> digits, or as many digits
- as needed to form a unique object name. An <n> of 0
+ Instead of using the default number of hexadecimal digits (which
+ will vary according to the number of objects in the repository with
+ a default of 7) of the abbreviated object name, use <n> digits, or
+ as many digits as needed to form a unique object name. An <n> of 0
will suppress long format, only showing the closest tag.
--candidates=<n>::
@@ -139,8 +140,11 @@ at the end.
The number of additional commits is the number
of commits which would be displayed by "git log v1.0.4..parent".
-The hash suffix is "-g" + unambiguous abbreviation for the tip commit
-of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`).
+The hash suffix is "-g" + an unambigous abbreviation for the tip commit
+of parent (which was `2414721b194453f058079d897d13c4e377f92dc6`). The
+length of the abbreviation scales as the repository grows, using the
+approximate number of objects in the repository and a bit of math
+around the birthday paradox, and defaults to a minimum of 7.
The "g" prefix stands for "git" and is used to allow describing the version of
a software depending on the SCM the software is managed with. This is useful
in an environment where people may use different SCMs.