On Mon, Jul 29, 2019 at 04:19:47PM +0200, Tamas Papp wrote:
> Generate 100k file into a repository:
>
> #!/bin/bash
>
> rm -rf .git test.file
> git init
> git config user.email a@b
> git config user.name c
>
> time for i in {1..100000}
> do
> [ $((i % 2)) -eq 1 ] && echo $i>test.file || echo 0 >test.file
> git add test.file
>
> git commit -m "$i committed"
>
> done
I lost patience kicking off two hundred thousand processes. Try this:
for i in {1..100000}
do
echo "commit HEAD"
echo "committer c <a@b> $i +0000"
echo "data <<EOF"
echo "$i committed"
echo "EOF"
echo
done | git fast-import
which runs much faster. This doesn't change any files in each commit,
but I don't think it's necessary for what you're showing (name-rev
wouldn't ever look at the trees).
> Run git on it:
>
> $ git name-rev a20f6989b75fa63ec6259a988e38714e1f5328a0
Anybody who runs your script will get a different sha1 because of the
change in timestamps. I guess this is HEAD, though. I also needed to
have an actual tag to find. So:
git tag old-tag HEAD~99999
git name-rev HEAD
segfaults for me.
> Could you coment on it?
This is a known issue. The algorithm used by name-rev is recursive, and
you can run out of stack space in some deep cases. There's more
discussion this thread:
https://public-inbox.org/git/[email protected]/
including some patches that document the problem with an expected
failure in our test suite. Nobody has actually rewritten the C code yet,
though.
-Peff
