1 files changed, 101 insertions, 116 deletions

diff --git a/builtin-for-each-ref.c b/builtin-for-each-ref.c
index 0327f40..bfde2e2 100644
--- a/builtin-for-each-ref.c
+++ b/builtin-for-each-ref.c
@@ -7,6 +7,7 @@
 #include "tree.h"
 #include "blob.h"
 #include "quote.h"
+#include "parse-options.h"
 
 /* Quoting styles */
 #define QUOTE_NONE 0
@@ -87,7 +88,6 @@ static int used_atom_cnt, sort_atom_limit, need_tagged;
 static int parse_atom(const char *atom, const char *ep)
 {
 	const char *sp;
-	char *n;
 	int i, at;
 
 	sp = atom;
@@ -106,7 +106,16 @@ static int parse_atom(const char *atom, const char *ep)
 	/* Is the atom a valid one? */
 	for (i = 0; i < ARRAY_SIZE(valid_atom); i++) {
 		int len = strlen(valid_atom[i].name);
-		if (len == ep - sp && !memcmp(valid_atom[i].name, sp, len))
+		/*
+		 * If the atom name has a colon, strip it and everything after
+		 * it off - it specifies the format for this entry, and
+		 * shouldn't be used for checking against the valid_atom
+		 * table.
+		 */
+		const char *formatp = strchr(sp, ':');
+		if (!formatp || ep < formatp)
+			formatp = ep;
+		if (len == formatp - sp && !memcmp(valid_atom[i].name, sp, len))
 			break;
 	}
 
@@ -120,10 +129,7 @@ static int parse_atom(const char *atom, const char *ep)
 			     (sizeof *used_atom) * used_atom_cnt);
 	used_atom_type = xrealloc(used_atom_type,
 				  (sizeof(*used_atom_type) * used_atom_cnt));
-	n = xmalloc(ep - atom + 1);
-	memcpy(n, atom, ep - atom);
-	n[ep-atom] = 0;
-	used_atom[at] = n;
+	used_atom[at] = xmemdupz(atom, ep - atom);
 	used_atom_type[at] = valid_atom[i].cmp_type;
 	return at;
 }
@@ -153,17 +159,18 @@ static const char *find_next(const char *cp)
  * Make sure the format string is well formed, and parse out
  * the used atoms.
  */
-static void verify_format(const char *format)
+static int verify_format(const char *format)
 {
 	const char *cp, *sp;
 	for (cp = format; *cp && (sp = find_next(cp)); ) {
 		const char *ep = strchr(sp, ')');
 		if (!ep)
-			die("malformatted format string %s", sp);
+			return error("malformatted format string %s", sp);
 		/* sp points at "%(" and ep points at the closing ")" */
 		parse_atom(sp + 2, ep);
 		cp = ep + 1;
 	}
+	return 0;
 }
 
 /*
@@ -307,54 +314,50 @@ static const char *find_wholine(const char *who, int wholen, const char *buf, un
 static const char *copy_line(const char *buf)
 {
 	const char *eol = strchr(buf, '\n');
-	char *line;
-	int len;
 	if (!eol)
 		return "";
-	len = eol - buf;
-	line = xmalloc(len + 1);
-	memcpy(line, buf, len);
-	line[len] = 0;
-	return line;
+	return xmemdupz(buf, eol - buf);
 }
 
 static const char *copy_name(const char *buf)
 {
-	const char *eol = strchr(buf, '\n');
-	const char *eoname = strstr(buf, " <");
-	char *line;
-	int len;
-	if (!(eoname && eol && eoname < eol))
-		return "";
-	len = eoname - buf;
-	line = xmalloc(len + 1);
-	memcpy(line, buf, len);
-	line[len] = 0;
-	return line;
+	const char *cp;
+	for (cp = buf; *cp && *cp != '\n'; cp++) {
+		if (!strncmp(cp, " <", 2))
+			return xmemdupz(buf, cp - buf);
+	}
+	return "";
 }
 
 static const char *copy_email(const char *buf)
 {
 	const char *email = strchr(buf, '<');
 	const char *eoemail = strchr(email, '>');
-	char *line;
-	int len;
 	if (!email || !eoemail)
 		return "";
-	eoemail++;
-	len = eoemail - email;
-	line = xmalloc(len + 1);
-	memcpy(line, email, len);
-	line[len] = 0;
-	return line;
+	return xmemdupz(email, eoemail + 1 - email);
 }
 
-static void grab_date(const char *buf, struct atom_value *v)
+static void grab_date(const char *buf, struct atom_value *v, const char *atomname)
 {
 	const char *eoemail = strstr(buf, "> ");
 	char *zone;
 	unsigned long timestamp;
 	long tz;
+	enum date_mode date_mode = DATE_NORMAL;
+	const char *formatp;
+
+	/*
+	 * We got here because atomname ends in "date" or "date<something>";
+	 * it's not possible that <something> is not ":<format>" because
+	 * parse_atom() wouldn't have allowed it, so we can assume that no
+	 * ":" means no format is specified, and use the default.
+	 */
+	formatp = strchr(atomname, ':');
+	if (formatp != NULL) {
+		formatp++;
+		date_mode = parse_date_format(formatp);
+	}
 
 	if (!eoemail)
 		goto bad;
@@ -364,7 +367,7 @@ static void grab_date(const char *buf, struct atom_value *v)
 	tz = strtol(zone, NULL, 10);
 	if ((tz == LONG_MIN || tz == LONG_MAX) && errno == ERANGE)
 		goto bad;
-	v->s = xstrdup(show_date(timestamp, tz, 0));
+	v->s = xstrdup(show_date(timestamp, tz, date_mode));
 	v->ul = timestamp;
 	return;
  bad:
@@ -391,7 +394,7 @@ static void grab_person(const char *who, struct atom_value *val, int deref, stru
 		if (name[wholen] != 0 &&
 		    strcmp(name + wholen, "name") &&
 		    strcmp(name + wholen, "email") &&
-		    strcmp(name + wholen, "date"))
+		    prefixcmp(name + wholen, "date"))
 			continue;
 		if (!wholine)
 			wholine = find_wholine(who, wholen, buf, sz);
@@ -403,8 +406,8 @@ static void grab_person(const char *who, struct atom_value *val, int deref, stru
 			v->s = copy_name(wholine);
 		else if (!strcmp(name + wholen, "email"))
 			v->s = copy_email(wholine);
-		else if (!strcmp(name + wholen, "date"))
-			grab_date(wholine, v);
+		else if (!prefixcmp(name + wholen, "date"))
+			grab_date(wholine, v, name);
 	}
 
 	/* For a tag or a commit object, if "creator" or "creatordate" is
@@ -424,8 +427,8 @@ static void grab_person(const char *who, struct atom_value *val, int deref, stru
 		if (deref)
 			name++;
 
-		if (!strcmp(name, "creatordate"))
-			grab_date(wholine, v);
+		if (!prefixcmp(name, "creatordate"))
+			grab_date(wholine, v, name);
 		else if (!strcmp(name, "creator"))
 			v->s = copy_line(wholine);
 	}
@@ -799,94 +802,76 @@ static struct ref_sort *default_sort(void)
 	return sort;
 }
 
-int cmd_for_each_ref(int ac, const char **av, const char *prefix)
+int opt_parse_sort(const struct option *opt, const char *arg, int unset)
+{
+	struct ref_sort **sort_tail = opt->value;
+	struct ref_sort *s;
+	int len;
+
+	if (!arg) /* should --no-sort void the list ? */
+		return -1;
+
+	*sort_tail = s = xcalloc(1, sizeof(*s));
+	sort_tail = &s->next;
+
+	if (*arg == '-') {
+		s->reverse = 1;
+		arg++;
+	}
+	len = strlen(arg);
+	s->atom = parse_atom(arg, arg+len);
+	return 0;
+}
+
+static char const * const for_each_ref_usage[] = {
+	"git-for-each-ref [options] [<pattern>]",
+	NULL
+};
+
+int cmd_for_each_ref(int argc, const char **argv, const char *prefix)
 {
 	int i, num_refs;
-	const char *format = NULL;
+	const char *format = "%(objectname) %(objecttype)\t%(refname)";
 	struct ref_sort *sort = NULL, **sort_tail = &sort;
-	int maxcount = 0;
-	int quote_style = -1; /* unspecified yet */
+	int maxcount = 0, quote_style;
+	int quote_shell = 0, quote_perl = 0, quote_python = 0, quote_tcl = 0;
 	struct refinfo **refs;
 	struct grab_ref_cbdata cbdata;
 
-	for (i = 1; i < ac; i++) {
-		const char *arg = av[i];
-		if (arg[0] != '-')
-			break;
-		if (!strcmp(arg, "--")) {
-			i++;
-			break;
-		}
-		if (!prefixcmp(arg, "--format=")) {
-			if (format)
-				die("more than one --format?");
-			format = arg + 9;
-			continue;
-		}
-		if (!strcmp(arg, "-s") || !strcmp(arg, "--shell") ) {
-			if (0 <= quote_style)
-				die("more than one quoting style?");
-			quote_style = QUOTE_SHELL;
-			continue;
-		}
-		if (!strcmp(arg, "-p") || !strcmp(arg, "--perl") ) {
-			if (0 <= quote_style)
-				die("more than one quoting style?");
-			quote_style = QUOTE_PERL;
-			continue;
-		}
-		if (!strcmp(arg, "--python") ) {
-			if (0 <= quote_style)
-				die("more than one quoting style?");
-			quote_style = QUOTE_PYTHON;
-			continue;
-		}
-		if (!strcmp(arg, "--tcl") ) {
-			if (0 <= quote_style)
-				die("more than one quoting style?");
-			quote_style = QUOTE_TCL;
-			continue;
-		}
-		if (!prefixcmp(arg, "--count=")) {
-			if (maxcount)
-				die("more than one --count?");
-			maxcount = atoi(arg + 8);
-			if (maxcount <= 0)
-				die("The number %s did not parse", arg);
-			continue;
-		}
-		if (!prefixcmp(arg, "--sort=")) {
-			struct ref_sort *s = xcalloc(1, sizeof(*s));
-			int len;
-
-			s->next = NULL;
-			*sort_tail = s;
-			sort_tail = &s->next;
-
-			arg += 7;
-			if (*arg == '-') {
-				s->reverse = 1;
-				arg++;
-			}
-			len = strlen(arg);
-			sort->atom = parse_atom(arg, arg+len);
-			continue;
-		}
-		break;
+	struct option opts[] = {
+		OPT_BOOLEAN('s', "shell", &quote_shell, "quote placeholders suitably for shells"),
+		OPT_BOOLEAN('p', "perl",  &quote_perl, "quote placeholders suitably for perl"),
+		OPT_BOOLEAN( 0 , "python", &quote_python, "quote placeholders suitably for python"),
+		OPT_BOOLEAN( 0 , "tcl",  &quote_tcl, "quote placeholders suitably for tcl"),
+
+		OPT_GROUP(""),
+		OPT_INTEGER( 0 , "count", &maxcount, "show only <n> matched refs"),
+		OPT_STRING(  0 , "format", &format, "format", "format to use for the output"),
+		OPT_CALLBACK(0 , "sort", sort_tail, "key",
+		            "field name to sort on", &opt_parse_sort),
+		OPT_END(),
+	};
+
+	parse_options(argc, argv, opts, for_each_ref_usage, 0);
+	if (maxcount < 0) {
+		error("invalid --count argument: `%d'", maxcount);
+		usage_with_options(for_each_ref_usage, opts);
 	}
-	if (quote_style < 0)
-		quote_style = QUOTE_NONE;
+	if (quote_shell + quote_perl + quote_python + quote_tcl > 1) {
+		error("more than one quoting style ?");
+		usage_with_options(for_each_ref_usage, opts);
+	}
+	if (verify_format(format))
+		usage_with_options(for_each_ref_usage, opts);
 
+	quote_style = QUOTE_SHELL * quote_shell + QUOTE_PERL * quote_perl +
+		QUOTE_PYTHON * quote_python + QUOTE_TCL * quote_tcl;
 	if (!sort)
 		sort = default_sort();
 	sort_atom_limit = used_atom_cnt;
-	if (!format)
-		format = "%(objectname) %(objecttype)\t%(refname)";
-
-	verify_format(format);
 
 	memset(&cbdata, 0, sizeof(cbdata));
-	cbdata.grab_pattern = av + i;
+	cbdata.grab_pattern = argv;
 	for_each_ref(grab_single_ref, &cbdata);
 	refs = cbdata.grab_array;
 	num_refs = cbdata.grab_cnt;