Glen Choo <chooglen@xxxxxxxxxx> writes:
> create_branch() was formerly used to set tracking without creating a
> branch. Since the previous commit replaces this use case with
> dwim_and_setup_tracking(), we can simplify create_branch() so that it
> always creates a branch.
>
> Do this simplification, in particular:
>
> * remove the special handling of BRANCH_TRACK_OVERRIDE because it is no
> longer used
> * assert that clobber_head_ok can only be provided with force
> * check that we're handling clobber_head_ok and force correctly by
> introducing tests for `git branch --force`
This might have been more simply explained as:
With the previous commit, these are true of create_branch():
* BRANCH_TRACK_OVERRIDE is no longer passed
* if clobber_head_ok is true, force is also true
Assert these situations, delete dead code, and ensure that we're
handling clobber_head_ok and force correctly by introducing tests for
`git branch --force`. This also means that create_branch() now always
creates a branch.
> @@ -426,15 +426,17 @@ void create_branch(struct repository *r, const char *name,
> char *real_ref;
> struct strbuf ref = STRBUF_INIT;
> int forcing = 0;
> - int dont_change_ref = 0;
> -
> - if ((track == BRANCH_TRACK_OVERRIDE || clobber_head_ok)
> - ? validate_branchname(name, &ref)
> - : validate_new_branchname(name, &ref, force)) {
> - if (!force)
> - dont_change_ref = 1;
> - else
> - forcing = 1;
> + struct ref_transaction *transaction;
> + struct strbuf err = STRBUF_INIT;
> + char *msg;
> +
> + if (clobber_head_ok && !force)
> + BUG("'clobber_head_ok' can only be used with 'force'");
> +
> + if (clobber_head_ok ?
> + validate_branchname(name, &ref) :
> + validate_new_branchname(name, &ref, force)) {
> + forcing = 1;
> }
Also assert that track is not BRANCH_TRACK_OVERRIDE.
> @@ -42,6 +42,23 @@ test_expect_success 'git branch abc should create a branch' '
> git branch abc && test_path_is_file .git/refs/heads/abc
> '
>
> +test_expect_success 'git branch abc should fail when abc exists' '
> + test_must_fail git branch abc
> +'
> +
> +test_expect_success 'git branch --force abc should fail when abc is checked out' '
> + test_when_finished git switch main &&
> + git switch abc &&
> + test_must_fail git branch --force abc HEAD~1
> +'
> +
> +test_expect_success 'git branch --force abc should succeed when abc exists' '
> + git rev-parse HEAD~1 >expect &&
> + git branch --force abc HEAD~1 &&
> + git rev-parse abc >actual &&
> + test_cmp expect actual
> +'
These tests make sense.
