On 09/29/2015 12:02 AM, David Turner wrote:
> Create new function verify_no_descendants, to hold one of the ref
> conflict checks used in verify_refname_available. Multiple backends
> will need this function, so it goes in the common code.
>
> Signed-off-by: David Turner <dtur...@twopensource.com>
> ---
> refs-be-files.c | 33 ++++++++-------------------------
> refs.c | 28 ++++++++++++++++++++++++++++
> refs.h | 4 ++++
> 3 files changed, 40 insertions(+), 25 deletions(-)
>
> diff --git a/refs-be-files.c b/refs-be-files.c
> index 943604c..8815111 100644
> --- a/refs-be-files.c
> +++ b/refs-be-files.c
> @@ -753,6 +753,7 @@ static int verify_refname_available_dir(const char
> *refname,
> struct strbuf *err)
> {
> const char *slash;
> + const char *extra_refname;
> int pos;
> struct strbuf dirname = STRBUF_INIT;
> int ret = -1;
> @@ -858,33 +859,15 @@ static int verify_refname_available_dir(const char
> *refname,
> }
> }
>
> - if (extras) {
> - /*
> - * Check for entries in extras that start with
> - * "$refname/". We do that by looking for the place
> - * where "$refname/" would be inserted in extras. If
> - * there is an entry at that position that starts with
> - * "$refname/" and is not in skip, then we have a
> - * conflict.
> - */
> - for (pos = string_list_find_insert_index(extras, dirname.buf,
> 0);
> - pos < extras->nr; pos++) {
> - const char *extra_refname = extras->items[pos].string;
> -
> - if (!starts_with(extra_refname, dirname.buf))
> - break;
> -
> - if (!skip || !string_list_has_string(skip,
> extra_refname)) {
> - strbuf_addf(err, "cannot process '%s' and '%s'
> at the same time",
> - refname, extra_refname);
> - goto cleanup;
> - }
> - }
> + extra_refname = find_descendant_ref(dirname.buf, extras, skip);
> + if (extra_refname) {
> + strbuf_addf(err,
> + "cannot process '%s' and '%s' at the same time",
> + refname, extra_refname);
> + } else {
> + ret = 0;
> }
>
> - /* No conflicts were found */
> - ret = 0;
> -
> cleanup:
> strbuf_release(&dirname);
> return ret;
> diff --git a/refs.c b/refs.c
> index 1c2dd79..17a364a 100644
> --- a/refs.c
> +++ b/refs.c
> @@ -994,6 +994,34 @@ enum peel_status peel_object(const unsigned char *name,
> unsigned char *sha1)
> return PEEL_PEELED;
> }
>
> +const char *find_descendant_ref(const char *refname,
> + const struct string_list *extras,
> + const struct string_list *skip)
> +{
> + int pos;
> + if (!extras)
> + return NULL;
> +
> + /*
> + * Check for entries in extras that start with "$refname/". We
> + * do that by looking for the place where "$refname/" would be
> + * inserted in extras. If there is an entry at that position
> + * that starts with "$refname/" and is not in skip, then we
> + * have a conflict.
> + */
Would you please turn this comment (or something like it) into a
docstring for this function in refs.h?
> + for (pos = string_list_find_insert_index(extras, refname, 0);
> + pos < extras->nr; pos++) {
> + const char *extra_refname = extras->items[pos].string;
> +
> + if (!starts_with(extra_refname, refname))
> + break;
> +
> + if (!skip || !string_list_has_string(skip, extra_refname))
> + return extra_refname;
> + }
> + return NULL;
> +}
> +
> /* backend functions */
> int refs_initdb(struct strbuf *err, int shared)
> {
> diff --git a/refs.h b/refs.h
> index da29232..cf1780e 100644
> --- a/refs.h
> +++ b/refs.h
> @@ -571,6 +571,10 @@ enum ref_type ref_type(const char *refname);
>
> int copy_reflog_msg(char *buf, const char *msg);
>
> +const char *find_descendant_ref(const char *refname,
> + const struct string_list *extras,
> + const struct string_list *skip);
> +
> int files_log_ref_write(const char *refname, const unsigned char *old_sha1,
> const unsigned char *new_sha1, const char *msg,
> int flags, struct strbuf *err);
>
Michael
--
Michael Haggerty
mhag...@alum.mit.edu
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