Christian Couder <chrisc...@tuxfamily.org> writes:
> Users replacing an object with one of a different type were not
> prevented to do so, even if it was obvious, and stated in the doc,
> that bad things would result from doing that.
>
> To avoid mistakes, it is better to just forbid that though.
>
> The doc will be updated in a later patch.
>
> Signed-off-by: Christian Couder <chrisc...@tuxfamily.org>
Feel free to steal some of my other email for the commit message, to
write down for posterity that reverting would not really be a useful
step.
The patch looks good to me.
> If this patch is considered useful, I will update the doc and
> maybe add tests.
>
> builtin/replace.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/builtin/replace.c b/builtin/replace.c
> index 59d3115..0246ab3 100644
> --- a/builtin/replace.c
> +++ b/builtin/replace.c
> @@ -85,6 +85,7 @@ static int replace_object(const char *object_ref, const
> char *replace_ref,
> int force)
> {
> unsigned char object[20], prev[20], repl[20];
> + enum object_type obj_type, repl_type;
> char ref[PATH_MAX];
> struct ref_lock *lock;
>
> @@ -100,6 +101,14 @@ static int replace_object(const char *object_ref, const
> char *replace_ref,
> if (check_refname_format(ref, 0))
> die("'%s' is not a valid ref name.", ref);
>
> + obj_type = sha1_object_info(object, NULL);
> + repl_type = sha1_object_info(repl, NULL);
> + if (obj_type != repl_type)
> + die("Object ref '%s' is of type '%s'\n"
> + "while replace ref '%s' is of type '%s'.",
> + object_ref, typename(obj_type),
> + replace_ref, typename(repl_type));
> +
> if (read_ref(ref, prev))
> hashclr(prev);
> else if (!force)
--
Thomas Rast
trast@{inf,student}.ethz.ch
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