*.c static functions: add missing __attribute__((format))

Add missing __attribute__((format)) function attributes to various
"static" functions that take printf arguments.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

add-patch.c

@@ -280,6 +280,7 @@ static void add_p_state_clear(struct add_p_state *s)
 	clear_add_i_state(&s->s);
 }
 
+__attribute__((format (printf, 2, 3)))
 static void err(struct add_p_state *s, const char *fmt, ...)
 {
 	va_list args;

builtin/am.c

@@ -210,6 +210,7 @@ static void write_state_bool(const struct am_state *state,
  * If state->quiet is false, calls fprintf(fp, fmt, ...), and appends a newline
  * at the end.
  */
+__attribute__((format (printf, 3, 4)))
 static void say(const struct am_state *state, FILE *fp, const char *fmt, ...)
 {
 	va_list ap;

builtin/bisect--helper.c

@@ -117,6 +117,7 @@ static int write_in_file(const char *path, const char *mode, const char *format,
 	return fclose(fp);
 }
 
+__attribute__((format (printf, 2, 3)))
 static int write_to_file(const char *path, const char *format, ...)
 {
 	int res;
@@ -129,6 +130,7 @@ static int write_to_file(const char *path, const char *format, ...)
 	return res;
 }
 
+__attribute__((format (printf, 2, 3)))
 static int append_to_file(const char *path, const char *format, ...)
 {
 	int res;

commit-graph.c

@@ -2408,6 +2408,7 @@ int write_commit_graph(struct object_directory *odb,
 #define VERIFY_COMMIT_GRAPH_ERROR_HASH 2
 static int verify_commit_graph_error;
 
+__attribute__((format (printf, 1, 2)))
 static void graph_report(const char *fmt, ...)
 {
 	va_list ap;

contrib/credential/osxkeychain/git-credential-osxkeychain.c

@@ -10,6 +10,7 @@ static char *username;
 static char *password;
 static UInt16 port;
 
+__attribute__((format (printf, 1, 2)))
 static void die(const char *err, ...)
 {
 	char msg[4096];

contrib/credential/wincred/git-credential-wincred.c

@@ -11,6 +11,7 @@
 
 #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
 
+__attribute__((format (printf, 1, 2)))
 static void die(const char *err, ...)
 {
 	char msg[4096];

gettext.c

@@ -66,6 +66,7 @@ const char *get_preferred_languages(void)
 }
 
 #ifndef NO_GETTEXT
+__attribute__((format (printf, 1, 2)))
 static int test_vsnprintf(const char *fmt, ...)
 {
 	char buf[26];

imap-send.c

@@ -451,6 +451,7 @@ static int buffer_gets(struct imap_buffer *b, char **s)
 	/* not reached */
 }
 
+__attribute__((format (printf, 1, 2)))
 static void imap_info(const char *msg, ...)
 {
 	va_list va;
@@ -463,6 +464,7 @@ static void imap_info(const char *msg, ...)
 	}
 }
 
+__attribute__((format (printf, 1, 2)))
 static void imap_warn(const char *msg, ...)
 {
 	va_list va;
@@ -504,6 +506,7 @@ static char *next_arg(char **s)
 	return ret;
 }
 
+__attribute__((format (printf, 3, 4)))
 static int nfsnprintf(char *buf, int blen, const char *fmt, ...)
 {
 	int ret;

mailmap.c

@@ -8,6 +8,7 @@
 #define debug_mm(...) fprintf(stderr, __VA_ARGS__)
 #define debug_str(X) ((X) ? (X) : "(none)")
 #else
+__attribute__((format (printf, 1, 2)))
 static inline void debug_mm(const char *format, ...) {}
 static inline const char *debug_str(const char *s) { return s; }
 #endif

merge-ort.c

@@ -529,6 +529,7 @@ static void clear_or_reinit_internal_opts(struct merge_options_internal *opti,
 	renames->callback_data_nr = renames->callback_data_alloc = 0;
 }
 
+__attribute__((format (printf, 2, 3)))
 static int err(struct merge_options *opt, const char *err, ...)
 {
 	va_list params;

merge-recursive.c

@@ -167,6 +167,7 @@ static void flush_output(struct merge_options *opt)
 	}
 }
 
+__attribute__((format (printf, 2, 3)))
 static int err(struct merge_options *opt, const char *err, ...)
 {
 	va_list params;

midx.c

@@ -1162,6 +1162,7 @@ void clear_midx_file(struct repository *r)
 
 static int verify_midx_error;
 
+__attribute__((format (printf, 1, 2)))
 static void midx_report(const char *fmt, ...)
 {
 	va_list ap;

ref-filter.c

@@ -213,6 +213,7 @@ static int used_atom_cnt, need_tagged, need_symref;
  * Expand string, append it to strbuf *sb, then return error code ret.
  * Allow to save few lines of code.
  */
+__attribute__((format (printf, 3, 4)))
 static int strbuf_addf_ret(struct strbuf *sb, int ret, const char *fmt, ...)
 {
 	va_list ap;

sequencer.c

@@ -3521,6 +3521,7 @@ static int do_exec(struct repository *r, const char *command_line)
 	return status;
 }
 
+__attribute__((format (printf, 2, 3)))
 static int safe_append(const char *filename, const char *fmt, ...)
 {
 	va_list ap;
@@ -3598,6 +3599,7 @@ static int do_label(struct repository *r, const char *name, int len)
 	return ret;
 }
 
+__attribute__((format (printf, 3, 4)))
 static const char *reflog_message(struct replay_opts *opts,
 	const char *sub_action, const char *fmt, ...)
 {

server-info.c

@@ -27,6 +27,7 @@ static int uic_is_stale(const struct update_info_ctx *uic)
 	return uic->old_fp == NULL;
 }
 
+__attribute__((format (printf, 2, 3)))
 static int uic_printf(struct update_info_ctx *uic, const char *fmt, ...)
 {
 	va_list ap;

worktree.c

@@ -265,6 +265,7 @@ const char *worktree_prune_reason(struct worktree *wt, timestamp_t expire)
 }
 
 /* convenient wrapper to deal with NULL strbuf */
+__attribute__((format (printf, 2, 3)))
 static void strbuf_addf_gently(struct strbuf *buf, const char *fmt, ...)
 {
 	va_list params;