On 04/17/2014 09:46 PM, Ronnie Sahlberg wrote:
> Update ref_transaction_update() do some basic error checking and return
> true on error. Update all callers to check ref_transaction_update() for error.
>
> Signed-off-by: Ronnie Sahlberg <sahlb...@google.com>
> ---
> builtin/update-ref.c | 11 +++++++----
> refs.c | 9 +++++++--
> refs.h | 10 +++++-----
> 3 files changed, 19 insertions(+), 11 deletions(-)
>
> diff --git a/builtin/update-ref.c b/builtin/update-ref.c
> index 405267f..12bfacc 100644
> --- a/builtin/update-ref.c
> +++ b/builtin/update-ref.c
> @@ -197,8 +197,10 @@ static const char *parse_cmd_update(struct strbuf
> *input, const char *next)
> if (*next != line_termination)
> die("update %s: extra input: %s", refname, next);
>
> - ref_transaction_update(transaction, refname, new_sha1, old_sha1,
> - update_flags, have_old);
> + if (ref_transaction_update(transaction, refname, new_sha1, old_sha1,
> + update_flags, have_old))
> + die("failed transaction update for %s", refname);
> +
>
> update_flags = 0;
> free(refname);
> @@ -286,8 +288,9 @@ static const char *parse_cmd_verify(struct strbuf *input,
> const char *next)
> if (*next != line_termination)
> die("verify %s: extra input: %s", refname, next);
>
> - ref_transaction_update(transaction, refname, new_sha1, old_sha1,
> - update_flags, have_old);
> + if (ref_transaction_update(transaction, refname, new_sha1, old_sha1,
> + update_flags, have_old))
> + die("failed transaction update for %s", refname);
>
> update_flags = 0;
> free(refname);
> diff --git a/refs.c b/refs.c
> index 138ab70..da1761d 100644
> --- a/refs.c
> +++ b/refs.c
> @@ -3327,19 +3327,24 @@ static struct ref_update *add_update(struct
> ref_transaction *transaction,
> return update;
> }
>
> -void ref_transaction_update(struct ref_transaction *transaction,
> +int ref_transaction_update(struct ref_transaction *transaction,
> const char *refname,
> const unsigned char *new_sha1,
> const unsigned char *old_sha1,
> int flags, int have_old)
> {
> - struct ref_update *update = add_update(transaction, refname);
> + struct ref_update *update;
> +
> + if (have_old && !old_sha1)
> + return error("have_old is true but old_sha1 is NULL");
The function documentation doesn't seem to allow old_sha1 == NULL. That
means that calling it that way is a bug, not an error. Therefore, I
think this should result in
die("BUG: have_old is true but old_sha1 is NULL");
>
> + update = add_update(transaction, refname);
> hashcpy(update->new_sha1, new_sha1);
> update->flags = flags;
> update->have_old = have_old;
> if (have_old)
> hashcpy(update->old_sha1, old_sha1);
> + return 0;
> }
>
> void ref_transaction_create(struct ref_transaction *transaction,
> diff --git a/refs.h b/refs.h
> index 892c5b6..00e4f7b 100644
> --- a/refs.h
> +++ b/refs.h
> @@ -237,11 +237,11 @@ void ref_transaction_rollback(struct ref_transaction
> *transaction);
> * that the reference should have had before the update, or zeros if
> * it must not have existed beforehand.
> */
> -void ref_transaction_update(struct ref_transaction *transaction,
> - const char *refname,
> - const unsigned char *new_sha1,
> - const unsigned char *old_sha1,
> - int flags, int have_old);
> +int ref_transaction_update(struct ref_transaction *transaction,
> + const char *refname,
> + const unsigned char *new_sha1,
> + const unsigned char *old_sha1,
> + int flags, int have_old);
>
> /*
> * Add a reference creation to transaction. new_sha1 is the value
>
--
Michael Haggerty
mhag...@alum.mit.edu
http://softwareswirl.blogspot.com/
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