Subject: Re: [PATCH v4 5/5] unpack-objects: unpack_non_delta_entry() read data in a stream

From: Ævar Arnfjörð Bjarmason <[email-masked]>
Date: Fri, 03 Dec 2021 14:54:40 +0100

On Fri, Dec 03 2021, Han Xin wrote:

> diff --git a/t/t5590-unpack-non-delta-objects.sh b/t/t5590-unpack-non-delta-objects.sh
> new file mode 100755
> index 0000000000..01d950d119
> --- /dev/null
> +++ b/t/t5590-unpack-non-delta-objects.sh
> @@ -0,0 +1,76 @@
> +#!/bin/sh
> +#
> +# Copyright (c) 2021 Han Xin
> +#
> +
> +test_description='Test unpack-objects when receive pack'
> +
> +GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME=main
> +export GIT_TEST_DEFAULT_INITIAL_BRANCH_NAME
> +
> +. ./test-lib.sh
> +
> +test_expect_success "create commit with big blobs (1.5 MB)" '
> +	test-tool genrandom foo 1500000 >big-blob &&
> +	test_commit --append foo big-blob &&
> +	test-tool genrandom bar 1500000 >big-blob &&
> +	test_commit --append bar big-blob &&
> +	(
> +		cd .git &&
> +		find objects/?? -type f | sort

...are thse...

> +	) >expect &&
> +	PACK=$(echo main | git pack-objects --progress --revs test)

Is --progress needed?

> +'
> +
> +test_expect_success 'setup GIT_ALLOC_LIMIT to 1MB' '
> +	GIT_ALLOC_LIMIT=1m &&
> +	export GIT_ALLOC_LIMIT
> +'
> +
> +test_expect_success 'prepare dest repository' '
> +	git init --bare dest.git &&
> +	git -C dest.git config core.bigFileThreshold 2m &&
> +	git -C dest.git config receive.unpacklimit 100

I think it would be better to just (could roll this into a function):

	test_when_finished "rm -rf dest.git" &&
	git init dest.git &&
	git -C dest.git config ...

Then you can use it with e.g. --run=3-4 and not have it error out
because of skipped setup.

A lot of our tests fail like that, but in this case fixing it seems
trivial.

> +'
> +
> +test_expect_success 'fail to unpack-objects: cannot allocate' '
> +	test_must_fail git -C dest.git unpack-objects <test-$PACK.pack 2>err &&
> +	test_i18ngrep "fatal: attempting to allocate" err &&

nit: just "grep", not "test_i18ngrep"

> +	(
> +		cd dest.git &&
> +		find objects/?? -type f | sort

..."find" needed over just globbing?:

    obj=$(echo objects/*/*)

?