Re: [PATCH v5 1/5] t5323: test cases for git-pack-redundant

[Junio C Hamano <gitster@pobox.com>]

Jiang Xin <worldhello.net@gmail.com> writes:

> From: Jiang Xin <zhiyou.jx@alibaba-inc.com>
>
> Add test cases for git pack-redundant to validate new algorithm for git
> pack-redundant.
>
> Signed-off-by: Jiang Xin <zhiyou.jx@alibaba-inc.com>
> Reviewed-by: SZEDER Gábor <szeder.dev@gmail.com>
> ---
>  t/t5323-pack-redundant.sh | 157 ++++++++++++++++++++++++++++++++++++++
>  1 file changed, 157 insertions(+)
>  create mode 100755 t/t5323-pack-redundant.sh
>
> diff --git a/t/t5323-pack-redundant.sh b/t/t5323-pack-redundant.sh
> new file mode 100755
> index 0000000000..7410426dee
> --- /dev/null
> +++ b/t/t5323-pack-redundant.sh
> @@ -0,0 +1,157 @@
> +#!/bin/sh
> +#
> +# Copyright (c) 2018 Jiang Xin
> +#
> +
> +test_description='git pack-redundant test'
> +
> +. ./test-lib.sh
> +
> +create_commits()
> +{

Style (see Documentation/CodingGuidelines).

> +	parent=
> +	for name in A B C D E F G H I J K L M N O P Q R
> +	do
> +		test_tick &&
> +		T=$(git write-tree) &&
> +		if test -z "$parent"
> +		then
> +			oid=$(echo $name | git commit-tree $T)
> +		else
> +			oid=$(echo $name | git commit-tree -p $parent $T)
> +		fi &&
> +		eval $name=$oid &&
> +		parent=$oid ||
> +		return 1
> +	done
> +	git update-ref refs/heads/master $M
> +}
> +
> +create_pack_1()
> +{
> +	P1=$(cd .git/objects/pack; printf "$T\n$A\n$B\n$C\n$D\n$E\n$F\n$R\n" | git pack-objects pack 2>/dev/null) &&

Yikes.  Can't "git pack-objects" get the input directly without
overlong printf, something along the lines of...

	P1=$(git -C .git/objects/pack pack-objects pack <<-EOF
		$A
		$B
		$C
		...
		$R
		EOF
	)

> +	eval P$P1=P1:$P1
> +}
> ...
> +test_expect_success 'setup' '
> +	create_commits
> +'
> +
> +test_expect_success 'no redundant packs' '
> +	create_pack_1 && create_pack_2 && create_pack_3 &&
> +	git pack-redundant --all >out &&
> +	test_must_be_empty out
> +'
> +
> +test_expect_success 'create pack 4, 5' '
> +	create_pack_4 && create_pack_5
> +'
> +
> +cat >expected <<EOF
> +P2:$P2
> +EOF

Move this to the next "expect success" block?

> +test_expect_success 'one of pack-2/pack-3 is redundant' '
> +	git pack-redundant --all >out &&
> +	sed -E -e "s#.*/pack-(.*)\.(idx|pack)#\1#" out | \

How portable is "sed -E" (it is not even in POSIX.1)?  Wouldn't it
be easier to work with to have two "-e" fed to a single sed
invocation instead?