parse-options: drop OPT_DATE()

There are no users of OPT_DATE except for test-parse-options; its
only caller went away in 27ec394a97 (prune: introduce OPT_EXPIRY_DATE()
and use it, 2013-04-25).

It also has a bug: it does not specify PARSE_OPT_NONEG, but its callback
does not respect the "unset" flag, and will feed NULL to approxidate()
and segfault. Probably this should be marked with NONEG, or the callback
should set the timestamp to some sentinel value (e.g,. "0", or
"(time_t)-1").

But since there are no callers, deleting it means we don't even have to
think about what the right behavior should be.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/technical/api-parse-options.txt

@@ -183,10 +183,6 @@ There are some macros to easily define options:
 	scale the provided value by 1024, 1024^2 or 1024^3 respectively.
 	The scaled value is put into `unsigned_long_var`.
 
-`OPT_DATE(short, long, &timestamp_t_var, description)`::
-	Introduce an option with date argument, see `approxidate()`.
-	The timestamp is put into `timestamp_t_var`.
-
 `OPT_EXPIRY_DATE(short, long, &timestamp_t_var, description)`::
 	Introduce an option with expiry date argument, see `parse_expiry_date()`.
 	The timestamp is put into `timestamp_t_var`.

parse-options-cb.c

@@ -28,13 +28,6 @@ int parse_opt_abbrev_cb(const struct option *opt, const char *arg, int unset)
 	return 0;
 }
 
-int parse_opt_approxidate_cb(const struct option *opt, const char *arg,
-			     int unset)
-{
-	*(timestamp_t *)(opt->value) = approxidate(arg);
-	return 0;
-}
-
 int parse_opt_expiry_date_cb(const struct option *opt, const char *arg,
 			     int unset)
 {

parse-options.h

@@ -150,9 +150,6 @@ struct option {
 				      (h), 0, &parse_opt_string_list }
 #define OPT_UYN(s, l, v, h)         { OPTION_CALLBACK, (s), (l), (v), NULL, \
 				      (h), PARSE_OPT_NOARG, &parse_opt_tertiary }
-#define OPT_DATE(s, l, v, h) \
-	{ OPTION_CALLBACK, (s), (l), (v), N_("time"),(h), 0,	\
-	  parse_opt_approxidate_cb }
 #define OPT_EXPIRY_DATE(s, l, v, h) \
 	{ OPTION_CALLBACK, (s), (l), (v), N_("expiry-date"),(h), 0,	\
 	  parse_opt_expiry_date_cb }
@@ -232,7 +229,6 @@ extern struct option *parse_options_concat(struct option *a, struct option *b);
 
 /*----- some often used options -----*/
 extern int parse_opt_abbrev_cb(const struct option *, const char *, int);
-extern int parse_opt_approxidate_cb(const struct option *, const char *, int);
 extern int parse_opt_expiry_date_cb(const struct option *, const char *, int);
 extern int parse_opt_color_flag_cb(const struct option *, const char *, int);
 extern int parse_opt_verbosity_cb(const struct option *, const char *, int);

t/helper/test-parse-options.c

@@ -119,7 +119,6 @@ int cmd__parse_options(int argc, const char **argv)
 		OPT_INTEGER('j', NULL, &integer, "get a integer, too"),
 		OPT_MAGNITUDE('m', "magnitude", &magnitude, "get a magnitude"),
 		OPT_SET_INT(0, "set23", &integer, "set integer to 23", 23),
-		OPT_DATE('t', NULL, &timestamp, "get timestamp of <time>"),
 		OPT_CALLBACK('L', "length", &integer, "str",
 			"get length of <str>", length_callback),
 		OPT_FILENAME('F', "file", &file, "set file to <file>"),

t/t0040-parse-options.sh

@@ -23,7 +23,6 @@ usage: test-tool parse-options <options>
     -j <n>                get a integer, too
     -m, --magnitude <n>   get a magnitude
     --set23               set integer to 23
-    -t <time>             get timestamp of <time>
     -L, --length <str>    get length of <str>
     -F, --file <file>     set file to <file>
 
@@ -245,27 +244,6 @@ test_expect_success 'keep some options as arguments' '
 	test-tool parse-options --expect="arg 00: --quux" --quux
 '
 
-cat >expect <<\EOF
-boolean: 0
-integer: 0
-magnitude: 0
-timestamp: 1
-string: (not set)
-abbrev: 7
-verbose: -1
-quiet: 1
-dry run: no
-file: (not set)
-arg 00: foo
-EOF
-
-test_expect_success 'OPT_DATE() works' '
-	test-tool parse-options -t "1970-01-01 00:00:01 +0000" \
-		foo -q >output 2>output.err &&
-	test_must_be_empty output.err &&
-	test_cmp expect output
-'
-
 cat >expect <<\EOF
 Callback: "four", 0
 boolean: 5