On 08/09, Junio C Hamano wrote:
> Junio C Hamano <gitster@xxxxxxxxx> writes:
>
> >>> > +# Insert a space after a cast
> >>> > +# x = (int32) y; not x = (int32)y;
> >>> > +SpaceAfterCStyleCast: true
> >>>
> >>> Hmph, I thought we did the latter, i.e. cast sticks to the casted
> >>> expression without SP.
> >>
> >> I've seen both and I wasn't sure which was the correct form to use.
> >
> > We do the latter because checkpatch.pl from the kernel project tells
> > us to, I think.
>
> Before I forget, there are some rules in checkpatch.pl that I
> deliberately ignore while accepting patches from the list.
>
> I appreciate the tool for pointing out overlong lines, but I often
> find them easier to read as-is than split into two lines, as the
> ones the people send in real life rarely excessively exceed the
> 80-col limit. We also use things like SHA_CTX that trigger "avoid
> camelcase", which I also ignore.
>
> One thing we probably should standardize is the way the width of
> bitfields in struct is specified. I think checkpatch.pl wants to do
>
> struct {
> unsigned int three_bits : 3;
> };
>
I couldn't find a specific setting for this, but it seems like the
.clang-format file I made wants bit fields to be formatted with spaces
surrounding the ':'.
> with SP around the colon, but our codebase does not always have the
> spaces there, and I see no technical reason not to follow suit, as
> long as we are following most of what checkpatch.pl wants us to do.
>
> By the way, I do not recall seeing a rule about this in your clang
> format rules. Can we spell it out in there?
>
> I also see this:
>
> WARNING: __printf(string-index, first-to-check) is preferred over
> __attribute__((format(printf, string-index, first-to-check)))
>
> but I think it is specific to the kernel source (the macro is
> defined in include/linux/compiler-gcc.h and expands to the latter),
> so I also ignore it.
>
> checkpatch.pl also warns a SP immediately before HT, which I do pay
I'm sorry what's 'HT'?
> attention to, as well as trailing whitespaces. If clang-format can
> be told to check that, I think we would want to have such a rule.
Clang-format by default removes trailing whitespace.
>
> For a reference, here is a sample set of changes to cache.h to
> squelch most of the warnings and errors checkpatch.pl points out
> that I do not ignore.
>
> cache.h | 30 +++++++++++++++---------------
> 1 file changed, 15 insertions(+), 15 deletions(-)
>
> diff --git a/cache.h b/cache.h
> index 4e390e6af8..dec807b3b0 100644
> --- a/cache.h
> +++ b/cache.h
> @@ -25,7 +25,7 @@
> #define platform_SHA_CTX SHA_CTX
> #define platform_SHA1_Init SHA1_Init
> #define platform_SHA1_Update SHA1_Update
> -#define platform_SHA1_Final SHA1_Final
> +#define platform_SHA1_Final SHA1_Final
> #endif
>
> #define git_SHA_CTX platform_SHA_CTX
> @@ -260,7 +260,7 @@ static inline void copy_cache_entry(struct cache_entry *dst,
>
> static inline unsigned create_ce_flags(unsigned stage)
> {
> - return (stage << CE_STAGESHIFT);
> + return stage << CE_STAGESHIFT;
> }
>
> #define ce_namelen(ce) ((ce)->ce_namelen)
> @@ -317,7 +317,7 @@ static inline unsigned int canon_mode(unsigned int mode)
> return S_IFGITLINK;
> }
>
> -#define cache_entry_size(len) (offsetof(struct cache_entry,name) + (len) + 1)
> +#define cache_entry_size(len) (offsetof(struct cache_entry, name) + (len) + 1)
>
> #define SOMETHING_CHANGED (1 << 0) /* unclassified changes go here */
> #define CE_ENTRY_CHANGED (1 << 1)
> @@ -373,7 +373,7 @@ extern void free_name_hash(struct index_state *istate);
> #define read_cache_unmerged() read_index_unmerged(&the_index)
> #define discard_cache() discard_index(&the_index)
> #define unmerged_cache() unmerged_index(&the_index)
> -#define cache_name_pos(name, namelen) index_name_pos(&the_index,(name),(namelen))
> +#define cache_name_pos(name, namelen) index_name_pos(&the_index, (name), (namelen))
> #define add_cache_entry(ce, option) add_index_entry(&the_index, (ce), (option))
> #define rename_cache_entry_at(pos, new_name) rename_index_entry_at(&the_index, (pos), (new_name))
> #define remove_cache_entry_at(pos) remove_index_entry_at(&the_index, (pos))
> @@ -1483,10 +1483,10 @@ struct checkout {
> const char *base_dir;
> int base_dir_len;
> struct delayed_checkout *delayed_checkout;
> - unsigned force:1,
> - quiet:1,
> - not_new:1,
> - refresh_cache:1;
> + unsigned force : 1,
> + quiet : 1,
> + not_new : 1,
> + refresh_cache : 1;
> };
> #define CHECKOUT_INIT { NULL, "" }
>
> @@ -1534,7 +1534,7 @@ extern struct alternate_object_database {
> char path[FLEX_ARRAY];
> } *alt_odb_list;
> extern void prepare_alt_odb(void);
> -extern void read_info_alternates(const char * relative_base, int depth);
> +extern void read_info_alternates(const char *relative_base, int depth);
> extern char *compute_alternate_path(const char *path, struct strbuf *err);
> typedef int alt_odb_fn(struct alternate_object_database *, void *);
> extern int foreach_alt_odb(alt_odb_fn, void*);
> @@ -1587,10 +1587,10 @@ extern struct packed_git {
> int index_version;
> time_t mtime;
> int pack_fd;
> - unsigned pack_local:1,
> - pack_keep:1,
> - freshened:1,
> - do_not_close:1;
> + unsigned pack_local : 1,
> + pack_keep : 1,
> + freshened : 1,
> + do_not_close : 1;
> unsigned char sha1[20];
> struct revindex_entry *revindex;
> /* something like ".git/objects/pack/xxxxx.pack" */
> @@ -1767,10 +1767,10 @@ struct object_info {
> union {
> /*
> * struct {
> - * ... Nothing to expose in this case
> + * ... Nothing to expose in this case
> * } cached;
> * struct {
> - * ... Nothing to expose in this case
> + * ... Nothing to expose in this case
> * } loose;
> */
> struct {
--
Brandon Williams
