Merge branch 'jc/strbuf-split'

Arrays of strbuf is often a wrong data structure to use, and
strbuf_split*() family of functions that create them often have
better alternatives.

Update several code paths and replace strbuf_split*().

* jc/strbuf-split:
  trace2: do not use strbuf_split*()
  trace2: trim_trailing_newline followed by trim is a no-op
  sub-process: do not use strbuf_split*()
  environment: do not use strbuf_split*()
  config: do not use strbuf_split()
  notes: do not use strbuf_split*()
  merge-tree: do not use strbuf_split*()
  clean: do not use strbuf_split*() [part 2]
  clean: do not pass the whole structure when it is not necessary
  clean: do not use strbuf_split*() [part 1]
  clean: do not pass strbuf by value
  wt-status: avoid strbuf_split*()

3 files changed, 64 insertions, 63 deletions

diff --git a/builtin/clean.c b/builtin/clean.c
index a1977b92dc..38b67923a6 100644
--- a/builtin/clean.c
+++ b/builtin/clean.c
@@ -478,43 +478,39 @@ static int find_unique(const char *choice, struct menu_stuff *menu_stuff)
  */
 static int parse_choice(struct menu_stuff *menu_stuff,
 			int is_single,
-			struct strbuf input,
+			char *input,
 			int **chosen)
 {
-	struct strbuf **choice_list, **ptr;
+	struct string_list choice = STRING_LIST_INIT_NODUP;
+	struct string_list_item *item;
 	int nr = 0;
 	int i;
 
-	if (is_single) {
-		choice_list = strbuf_split_max(&input, '\n', 0);
-	} else {
-		char *p = input.buf;
-		do {
-			if (*p == ',')
-				*p = ' ';
-		} while (*p++);
-		choice_list = strbuf_split_max(&input, ' ', 0);
-	}
+	string_list_split_in_place_f(&choice, input,
+				     is_single ? "\n" : ", ", -1,
+				     STRING_LIST_SPLIT_TRIM);
 
-	for (ptr = choice_list; *ptr; ptr++) {
-		char *p;
-		int choose = 1;
+	for_each_string_list_item(item, &choice) {
+		const char *string;
+		int choose;
 		int bottom = 0, top = 0;
 		int is_range, is_number;
 
-		strbuf_trim(*ptr);
-		if (!(*ptr)->len)
+		string = item->string;
+		if (!*string)
 			continue;
 
 		/* Input that begins with '-'; unchoose */
-		if (*(*ptr)->buf == '-') {
+		if (string[0] == '-') {
 			choose = 0;
-			strbuf_remove((*ptr), 0, 1);
+			string++;
+		} else {
+			choose = 1;
 		}
 
 		is_range = 0;
 		is_number = 1;
-		for (p = (*ptr)->buf; *p; p++) {
+		for (const char *p = string; *p; p++) {
 			if ('-' == *p) {
 				if (!is_range) {
 					is_range = 1;
@@ -532,27 +528,27 @@ static int parse_choice(struct menu_stuff *menu_stuff,
 		}
 
 		if (is_number) {
-			bottom = atoi((*ptr)->buf);
+			bottom = atoi(string);
 			top = bottom;
 		} else if (is_range) {
-			bottom = atoi((*ptr)->buf);
+			bottom = atoi(string);
 			/* a range can be specified like 5-7 or 5- */
-			if (!*(strchr((*ptr)->buf, '-') + 1))
+			if (!*(strchr(string, '-') + 1))
 				top = menu_stuff->nr;
 			else
-				top = atoi(strchr((*ptr)->buf, '-') + 1);
-		} else if (!strcmp((*ptr)->buf, "*")) {
+				top = atoi(strchr(string, '-') + 1);
+		} else if (!strcmp(string, "*")) {
 			bottom = 1;
 			top = menu_stuff->nr;
 		} else {
-			bottom = find_unique((*ptr)->buf, menu_stuff);
+			bottom = find_unique(string, menu_stuff);
 			top = bottom;
 		}
 
 		if (top <= 0 || bottom <= 0 || top > menu_stuff->nr || bottom > top ||
 		    (is_single && bottom != top)) {
 			clean_print_color(CLEAN_COLOR_ERROR);
-			printf(_("Huh (%s)?\n"), (*ptr)->buf);
+			printf(_("Huh (%s)?\n"), string);
 			clean_print_color(CLEAN_COLOR_RESET);
 			continue;
 		}
@@ -561,7 +557,7 @@ static int parse_choice(struct menu_stuff *menu_stuff,
 			(*chosen)[i-1] = choose;
 	}
 
-	strbuf_list_free(choice_list);
+	string_list_clear(&choice, 0);
 
 	for (i = 0; i < menu_stuff->nr; i++)
 		nr += (*chosen)[i];
@@ -631,7 +627,7 @@ static int *list_and_choose(struct menu_opts *opts, struct menu_stuff *stuff)
 
 		nr = parse_choice(stuff,
 				  opts->flags & MENU_OPTS_SINGLETON,
-				  choice,
+				  choice.buf,
 				  &chosen);
 
 		if (opts->flags & MENU_OPTS_SINGLETON) {
@@ -679,12 +675,13 @@ static int filter_by_patterns_cmd(void)
 {
 	struct dir_struct dir = DIR_INIT;
 	struct strbuf confirm = STRBUF_INIT;
-	struct strbuf **ignore_list;
-	struct string_list_item *item;
 	struct pattern_list *pl;
 	int changed = -1, i;
 
 	for (;;) {
+		struct string_list ignore_list = STRING_LIST_INIT_NODUP;
+		struct string_list_item *item;
+
 		if (!del_list.nr)
 			break;
 
@@ -702,14 +699,15 @@ static int filter_by_patterns_cmd(void)
 			break;
 
 		pl = add_pattern_list(&dir, EXC_CMDL, "manual exclude");
-		ignore_list = strbuf_split_max(&confirm, ' ', 0);
 
-		for (i = 0; ignore_list[i]; i++) {
-			strbuf_trim(ignore_list[i]);
-			if (!ignore_list[i]->len)
-				continue;
+		string_list_split_in_place_f(&ignore_list, confirm.buf, " ", -1,
+					     STRING_LIST_SPLIT_TRIM);
 
-			add_pattern(ignore_list[i]->buf, "", 0, pl, -(i+1));
+		for (i = 0; i < ignore_list.nr; i++) {
+			item = &ignore_list.items[i];
+			if (!*item->string)
+				continue;
+			add_pattern(item->string, "", 0, pl, -(i+1));
 		}
 
 		changed = 0;
@@ -730,7 +728,7 @@ static int filter_by_patterns_cmd(void)
 			clean_print_color(CLEAN_COLOR_RESET);
 		}
 
-		strbuf_list_free(ignore_list);
+		string_list_clear(&ignore_list, 0);
 		dir_clear(&dir);
 	}
 
diff --git a/builtin/merge-tree.c b/builtin/merge-tree.c
index 203f0e6456..1c063d9a41 100644
--- a/builtin/merge-tree.c
+++ b/builtin/merge-tree.c
@@ -619,32 +619,34 @@ int cmd_merge_tree(int argc,
 			    "--merge-base", "--stdin");
 		line_termination = '\0';
 		while (strbuf_getline_lf(&buf, stdin) != EOF) {
-			struct strbuf **split;
+			struct string_list split = STRING_LIST_INIT_NODUP;
 			const char *input_merge_base = NULL;
 
-			split = strbuf_split(&buf, ' ');
-			if (!split[0] || !split[1])
+			string_list_split_in_place_f(&split, buf.buf, " ", -1,
+						     STRING_LIST_SPLIT_TRIM);
+
+			if (split.nr < 2)
 				die(_("malformed input line: '%s'."), buf.buf);
-			strbuf_rtrim(split[0]);
-			strbuf_rtrim(split[1]);
 
 			/* parse the merge-base */
-			if (!strcmp(split[1]->buf, "--")) {
-				input_merge_base = split[0]->buf;
+			if (!strcmp(split.items[1].string, "--")) {
+				input_merge_base = split.items[0].string;
 			}
 
-			if (input_merge_base && split[2] && split[3] && !split[4]) {
-				strbuf_rtrim(split[2]);
-				strbuf_rtrim(split[3]);
-				real_merge(&o, input_merge_base, split[2]->buf, split[3]->buf, prefix);
-			} else if (!input_merge_base && !split[2]) {
-				real_merge(&o, NULL, split[0]->buf, split[1]->buf, prefix);
+			if (input_merge_base && split.nr == 4) {
+				real_merge(&o, input_merge_base,
+					   split.items[2].string, split.items[3].string,
+					   prefix);
+			} else if (!input_merge_base && split.nr == 2) {
+				real_merge(&o, NULL,
+					   split.items[0].string, split.items[1].string,
+					   prefix);
 			} else {
 				die(_("malformed input line: '%s'."), buf.buf);
 			}
 			maybe_flush_or_die(stdout, "stdout");
 
-			strbuf_list_free(split);
+			string_list_clear(&split, 0);
 		}
 		strbuf_release(&buf);
 
diff --git a/builtin/notes.c b/builtin/notes.c
index 6fb4144da3..9af602bdd7 100644
--- a/builtin/notes.c
+++ b/builtin/notes.c
@@ -376,18 +376,19 @@ static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 
 	while (strbuf_getline_lf(&buf, stdin) != EOF) {
 		struct object_id from_obj, to_obj;
-		struct strbuf **split;
+		struct string_list split = STRING_LIST_INIT_NODUP;
 		int err;
 
-		split = strbuf_split(&buf, ' ');
-		if (!split[0] || !split[1])
+		string_list_split_in_place_f(&split, buf.buf, " ", -1,
+					     STRING_LIST_SPLIT_TRIM);
+		if (split.nr < 2)
 			die(_("malformed input line: '%s'."), buf.buf);
-		strbuf_rtrim(split[0]);
-		strbuf_rtrim(split[1]);
-		if (repo_get_oid(the_repository, split[0]->buf, &from_obj))
-			die(_("failed to resolve '%s' as a valid ref."), split[0]->buf);
-		if (repo_get_oid(the_repository, split[1]->buf, &to_obj))
-			die(_("failed to resolve '%s' as a valid ref."), split[1]->buf);
+		if (repo_get_oid(the_repository, split.items[0].string, &from_obj))
+			die(_("failed to resolve '%s' as a valid ref."),
+			    split.items[0].string);
+		if (repo_get_oid(the_repository, split.items[1].string, &to_obj))
+			die(_("failed to resolve '%s' as a valid ref."),
+			    split.items[1].string);
 
 		if (rewrite_cmd)
 			err = copy_note_for_rewrite(c, &from_obj, &to_obj);
@@ -397,11 +398,11 @@ static int notes_copy_from_stdin(int force, const char *rewrite_cmd)
 
 		if (err) {
 			error(_("failed to copy notes from '%s' to '%s'"),
-			      split[0]->buf, split[1]->buf);
+			      split.items[0].string, split.items[1].string);
 			ret = 1;
 		}
 
-		strbuf_list_free(split);
+		string_list_clear(&split, 0);
 	}
 
 	if (!rewrite_cmd) {