David Woodhouse <dwmw2@xxxxxxxxxxxxx> writes:
> My DSL line sucks; I know this. But why is git-clone so bad at using it?
I did the same and it initially got 45MB pack (14.5k objects).
For my case, the reason was because the repository I used as the
reference was pruned and packed its refs, and git-clone was not
fully using the refs from the reference repository.
The following patch made it to be almost instantaneous. The
resulting clone has 600kB pack (0.5k objects).
diff --git a/git-clone.sh b/git-clone.sh
index 1710996..1bd54de 100755
--- a/git-clone.sh
+++ b/git-clone.sh
@@ -178,46 +178,32 @@ esac && export GIT_DIR && git-init ${template+"$template"} || usage
if test -n "$reference"
then
+ ref_git=
if test -d "$reference"
then
if test -d "$reference/.git/objects"
then
- reference="$reference/.git"
+ ref_git="$reference/.git"
+ elif test -d "$reference/objects"
+ then
+ ref_git="$reference"
fi
- reference=$(cd "$reference" && pwd)
- echo "$reference/objects" >"$GIT_DIR/objects/info/alternates"
- (cd "$reference" && tar cf - refs) |
- (cd "$GIT_DIR/refs" &&
- mkdir reference-tmp &&
- cd reference-tmp &&
- tar xf - &&
- find refs ! -type d -print |
- while read ref
- do
- if test -h "$ref"
- then
- # Old-style symbolic link ref. Not likely
- # to appear under refs/ but we might as well
- # deal with them.
- :
- elif test -f "$ref"
- then
- point=$(cat "$ref") &&
- case "$point" in
- 'ref: '*) ;;
- *) continue ;;
- esac
- fi
- # The above makes true ref to 'continue' and
- # we will come here when we are looking at
- # symbolic link ref or a textual symref (or
- # garbage, like fifo).
- # The true ref pointed at by it is enough to
- # ensure that we do not fetch objects reachable
- # from it.
- rm -f "$ref"
- done
- )
+ fi
+ if test -n "$ref_git"
+ then
+ ref_git=$(cd "$ref_git" && pwd)
+ echo "$ref_git/objects" >"$GIT_DIR/objects/info/alternates"
+ (
+ GIT_DIR="$ref_git" git for-each-ref \
+ --format='%(objectname) %(*objectname)'
+ ) |
+ while read a b
+ do
+ test -z "$a" ||
+ git update-ref "refs/reference-tmp/$a" "$a"
+ test -z "$b" ||
+ git update-ref "refs/reference-tmp/$b" "$b"
+ done
else
die "reference repository '$reference' is not a local directory."
fi
-
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