On Mon, Aug 17, 2015 at 10:12 AM, Eric Sunshine <sunshine@xxxxxxxxxxxxxx> wrote:
> On Sat, Aug 15, 2015 at 2:00 PM, Karthik Nayak <karthik.188@xxxxxxxxx> wrote:
>> Add a function called 'for_each_reftype_fullpath()' to refs.{c,h}
>> which iterates through each ref for the given path without trimming
>> the path and also accounting for broken refs, if mentioned.
>>
>> Add 'filter_ref_kind()' in ref-filter.c to check the kind of ref being
>> handled and return the kind to 'ref_filter_handler()', where we
>> discard refs which we do not need and assign the kind to needed refs.
>>
>> Signed-off-by: Karthik Nayak <karthik.188@xxxxxxxxx>
>> ---
>> diff --git a/ref-filter.c b/ref-filter.c
>> index eac99d0..abcd235 100644
>> --- a/ref-filter.c
>> +++ b/ref-filter.c
>> @@ -1226,16 +1262,29 @@ int filter_refs(struct ref_array *array, struct ref_filter *filter, unsigned int
>> {
>> struct ref_filter_cbdata ref_cbdata;
>> int ret = 0;
>> + unsigned int broken = 0;
>>
>> ref_cbdata.array = array;
>> ref_cbdata.filter = filter;
>>
>> /* Simple per-ref filtering */
>> - if (type & (FILTER_REFS_ALL | FILTER_REFS_INCLUDE_BROKEN))
>> - ret = for_each_rawref(ref_filter_handler, &ref_cbdata);
>> - else if (type & FILTER_REFS_ALL)
>> - ret = for_each_ref(ref_filter_handler, &ref_cbdata);
>> - else if (type)
>> + if (type & FILTER_REFS_INCLUDE_BROKEN) {
>> + type -= FILTER_REFS_INCLUDE_BROKEN;
>
> The above is a somewhat unusual way to say the more idiomatic:
>
> type &= ~FILTER_REFS_INCLUDE_BROKEN;
>
> when dealing with bit flags. Is there precedence elsewhere in the
> project for choosing '-' over '~'?
>
I just preferred it this way, but will change it.
>> + broken = 1;
>> + }
>> +
>> + filter->kind = type;
>> + if (type == FILTER_REFS_BRANCHES)
>> + ret = for_each_reftype_fullpath(ref_filter_handler, "refs/heads/", broken, &ref_cbdata);
>> + else if (type == FILTER_REFS_REMOTES)
>> + ret = for_each_reftype_fullpath(ref_filter_handler, "refs/remotes/", broken, &ref_cbdata);
>> + else if (type == FILTER_REFS_TAGS)
>> + ret = for_each_reftype_fullpath(ref_filter_handler, "refs/tags/", broken, &ref_cbdata);
>> + else if (type & FILTER_REFS_ALL) {
>> + e ret = for_each_reftype_fullpath(ref_filter_handler, "", broken, &ref_cbdata);
>
> These cases are all the same except for the (string) second argument,
> aren't they? This might be less noisy and easier to follow if you
> assign the appropriate string to a variable first, and then invoke
> for_each_reftype_fullpath() once with the string variable as an
> argument.
>
The problem is when we have FILTER_REFS_DETACHED_HEAD we need
to call head_ref() after collecting all other refs, this is because in
branch.c we
need to print the detached head first, hence it's inserted to the end of the
ref_array. Doing it the way you suggested would require to check FILTER_REFS_ALL
again after the first time for setting the string variable. I'd find
that a bit more
confusing.
>> + if (type & FILTER_REFS_DETACHED_HEAD)
>> + head_ref(ref_filter_handler, &ref_cbdata);
>> + } else
>> die("filter_refs: invalid type");
>>
>> /* Filters that need revision walking */
>> diff --git a/ref-filter.h b/ref-filter.h
>> index 144a633..64fedd3 100644
>> --- a/ref-filter.h
>> +++ b/ref-filter.h
>> @@ -14,8 +14,14 @@
>> -#define FILTER_REFS_INCLUDE_BROKEN 0x1
>> -#define FILTER_REFS_ALL 0x2
>> +#define FILTER_REFS_INCLUDE_BROKEN 0x0001
>> +#define FILTER_REFS_TAGS 0x0002
>> +#define FILTER_REFS_BRANCHES 0x0004
>> +#define FILTER_REFS_REMOTES 0x0008
>> +#define FILTER_REFS_OTHERS 0x0010
>> +#define FILTER_REFS_ALL (FILTER_REFS_TAGS | FILTER_REFS_BRANCHES | \
>> + FILTER_REFS_REMOTES | FILTER_REFS_OTHERS)
>> +#define FILTER_REFS_DETACHED_HEAD 0x0020
>
> I suppose there's some good reason that FILTER_REFS_DETACHED_HEAD is
> not a member of FILTER_REFS_ALL? Perhaps add a comment explaining it?
>
>> diff --git a/refs.c b/refs.c
>> index 2db2975..0f18c34 100644
>> --- a/refs.c
>> +++ b/refs.c
>> @@ -2145,6 +2145,13 @@ int for_each_replace_ref(each_ref_fn fn, void *cb_data)
>> strlen(git_replace_ref_base), 0, cb_data);
>> }
>>
>> +int for_each_reftype_fullpath(each_ref_fn fn, char *type, unsigned int broken, void *cb_data)
>> +{
>> + if (broken)
>> + broken = DO_FOR_EACH_INCLUDE_BROKEN;
>
> It's a bit ugly and confusing to have the same variable, 'broken', act
> as both a boolean input argument and as a bit flag argument to the
> called function.
>
Ill change that :)
--
Regards,
Karthik Nayak
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