Re: [PATCH] checkout: add --fetch to fetch remote before resolving start-point

[Ramsay Jones <ramsay@ramsayjones.plus.com>]

On 24/04/2026 11:03 am, Harald Nordgren via GitGitGadget wrote:
> From: Harald Nordgren <haraldnordgren@gmail.com>
> 
> Add a --fetch option to git checkout and git switch, plus a
> checkout.autoFetch config to enable it by default. When set and the
> start-point argument names a configured remote (either bare, like
> "origin", or prefixed, like "origin/foo"), fetch that remote before
> resolving the ref. Aborts the checkout if the fetch fails.
> 
> Signed-off-by: Harald Nordgren <haraldnordgren@gmail.com>
> ---

[snip]

>  
> diff --git a/t/t7201-co.sh b/t/t7201-co.sh
> index 9bcf7c0b40..60ddebd9c3 100755
> --- a/t/t7201-co.sh
> +++ b/t/t7201-co.sh
> @@ -801,4 +801,55 @@ test_expect_success 'tracking info copied with autoSetupMerge=inherit' '
>  	test_cmp_config "" --default "" branch.main2.merge
>  '
>  
> +test_expect_success 'setup upstream for --fetch tests' '
> +	git checkout main &&
> +	git init fetch_upstream &&
> +	test_commit -C fetch_upstream u_main &&
> +	git remote add fetch_upstream fetch_upstream &&
> +	git fetch fetch_upstream &&
> +	git -C fetch_upstream checkout -b fetch_new &&
> +	test_commit -C fetch_upstream u_new
> +'
> +
> +test_expect_success 'checkout --fetch -b picks up branch created upstream after clone' '
> +	git checkout main &&
> +	test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_new &&
> +	git checkout --fetch -b local_new fetch_upstream/fetch_new &&
> +	test_cmp_rev refs/remotes/fetch_upstream/fetch_new HEAD
> +'
> +
> +test_expect_success 'checkout --fetch with bare remote name fetches the remote' '
> +	git checkout main &&
> +	git -C fetch_upstream checkout -b fetch_new2 &&
> +	test_commit -C fetch_upstream u_new2 &&
> +	test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_new2 &&
> +	git checkout --fetch -b local_from_remote fetch_upstream &&
> +	git rev-parse --verify refs/remotes/fetch_upstream/fetch_new2
> +'
> +
> +test_expect_success 'checkout --fetch aborts and does not create branch on fetch failure' '
> +	git checkout main &&
> +	test_might_fail git branch -D bogus &&
> +	test_must_fail git checkout --fetch -b bogus fetch_upstream/does_not_exist &&
> +	test_must_fail git rev-parse --verify refs/heads/bogus
> +'
> +
> +test_expect_success 'checkout.autoFetch=true enables fetching without --fetch' '
> +	git checkout main &&
> +	git -C fetch_upstream checkout -b fetch_cfg &&
> +	test_commit -C fetch_upstream u_cfg &&
> +	test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_cfg &&
> +	git -c checkout.autoFetch=true checkout -b local_cfg fetch_upstream/fetch_cfg &&
> +	test_cmp_rev refs/remotes/fetch_upstream/fetch_cfg HEAD
> +'
> +
> +test_expect_success 'switch --fetch -c picks up branch created upstream after clone' '
> +	git checkout main &&
> +	git -C fetch_upstream checkout -b fetch_switch &&
> +	test_commit -C fetch_upstream u_switch &&
> +	test_must_fail git rev-parse --verify refs/remotes/fetch_upstream/fetch_switch &&
> +	git switch --fetch -c local_switch fetch_upstream/fetch_switch &&
> +	test_cmp_rev refs/remotes/fetch_upstream/fetch_switch HEAD
> +'
> +

I was just skimming the list (so if this is not appropriate, please just ignore) and,
although I think '--no-fetch' will probably countermand the autoFetch config, I do not
see a test that confirms it.

Thanks.

ATB,
Ramsay Jones