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-rw-r--r--Documentation/git-cat-file.txt18
-rw-r--r--builtin/cat-file.c6
2 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/git-cat-file.txt b/Documentation/git-cat-file.txt
index 7c57eca9b0..10fbc6a373 100644
--- a/Documentation/git-cat-file.txt
+++ b/Documentation/git-cat-file.txt
@@ -106,6 +106,10 @@ newline. The available atoms are:
The size, in bytes, of the object (the same as `cat-file -s`
reports).
+`objectsize:disk`::
+ The size, in bytes, that the object takes up on disk. See the
+ note about on-disk sizes in the `CAVEATS` section below.
+
If no format is specified, the default format is `%(objectname)
%(objecttype) %(objectsize)`.
@@ -133,6 +137,20 @@ the repository, then `cat-file` will ignore any custom format and print:
<object> SP missing LF
------------
+
+CAVEATS
+-------
+
+Note that the sizes of objects on disk are reported accurately, but care
+should be taken in drawing conclusions about which refs or objects are
+responsible for disk usage. The size of a packed non-delta object may be
+much larger than the size of objects which delta against it, but the
+choice of which object is the base and which is the delta is arbitrary
+and is subject to change during a repack. Note also that multiple copies
+of an object may be present in the object database; in this case, it is
+undefined which copy's size will be reported.
+
+
GIT
---
Part of the linkgit:git[1] suite
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index b43a0c5040..11fa8c08bc 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -118,6 +118,7 @@ struct expand_data {
unsigned char sha1[20];
enum object_type type;
unsigned long size;
+ unsigned long disk_size;
/*
* If mark_query is true, we do not expand anything, but rather
@@ -155,6 +156,11 @@ static void expand_atom(struct strbuf *sb, const char *atom, int len,
data->info.sizep = &data->size;
else
strbuf_addf(sb, "%lu", data->size);
+ } else if (is_atom("objectsize:disk", atom, len)) {
+ if (data->mark_query)
+ data->info.disk_sizep = &data->disk_size;
+ else
+ strbuf_addf(sb, "%lu", data->disk_size);
} else
die("unknown format element: %.*s", len, atom);
}