Merge branch 'nd/ls-tree-pathspec'

"git ls-tree" does not support path selection based on negative
pathspecs, but did not error out when negative pathspecs are given.

* nd/ls-tree-pathspec:
  t3102: style modernization
  t3102: document that ls-tree does not yet support negated pathspec
  ls-tree: disable negative pathspec because it's not supported
  ls-tree: remove path filtering logic in show_tree
  tree.c: update read_tree_recursive callback to pass strbuf as base

10 files changed, 74 insertions, 69 deletions

diff --git a/archive.c b/archive.c
index 94a9981adf..9e30246b64 100644
--- a/archive.c
+++ b/archive.c
@@ -157,18 +157,26 @@ static int write_archive_entry(const unsigned char *sha1, const char *base,
 	return write_entry(args, sha1, path.buf, path.len, mode);
 }
 
+static int write_archive_entry_buf(const unsigned char *sha1, struct strbuf *base,
+		const char *filename, unsigned mode, int stage,
+		void *context)
+{
+	return write_archive_entry(sha1, base->buf, base->len,
+				     filename, mode, stage, context);
+}
+
 static void queue_directory(const unsigned char *sha1,
-		const char *base, int baselen, const char *filename,
+		struct strbuf *base, const char *filename,
 		unsigned mode, int stage, struct archiver_context *c)
 {
 	struct directory *d;
-	d = xmallocz(sizeof(*d) + baselen + 1 + strlen(filename));
+	d = xmallocz(sizeof(*d) + base->len + 1 + strlen(filename));
 	d->up	   = c->bottom;
-	d->baselen = baselen;
+	d->baselen = base->len;
 	d->mode	   = mode;
 	d->stage   = stage;
 	c->bottom  = d;
-	d->len = sprintf(d->path, "%.*s%s/", baselen, base, filename);
+	d->len = sprintf(d->path, "%.*s%s/", (int)base->len, base->buf, filename);
 	hashcpy(d->sha1, sha1);
 }
 
@@ -191,28 +199,28 @@ static int write_directory(struct archiver_context *c)
 }
 
 static int queue_or_write_archive_entry(const unsigned char *sha1,
-		const char *base, int baselen, const char *filename,
+		struct strbuf *base, const char *filename,
 		unsigned mode, int stage, void *context)
 {
 	struct archiver_context *c = context;
 
 	while (c->bottom &&
-	       !(baselen >= c->bottom->len &&
-		 !strncmp(base, c->bottom->path, c->bottom->len))) {
+	       !(base->len >= c->bottom->len &&
+		 !strncmp(base->buf, c->bottom->path, c->bottom->len))) {
 		struct directory *next = c->bottom->up;
 		free(c->bottom);
 		c->bottom = next;
 	}
 
 	if (S_ISDIR(mode)) {
-		queue_directory(sha1, base, baselen, filename,
+		queue_directory(sha1, base, filename,
 				mode, stage, c);
 		return READ_TREE_RECURSIVE;
 	}
 
 	if (write_directory(c))
 		return -1;
-	return write_archive_entry(sha1, base, baselen, filename, mode,
+	return write_archive_entry(sha1, base->buf, base->len, filename, mode,
 				   stage, context);
 }
 
@@ -260,7 +268,7 @@ int write_archive_entries(struct archiver_args *args,
 	err = read_tree_recursive(args->tree, "", 0, 0, &args->pathspec,
 				  args->pathspec.has_wildcard ?
 				  queue_or_write_archive_entry :
-				  write_archive_entry,
+				  write_archive_entry_buf,
 				  &context);
 	if (err == READ_TREE_RECURSIVE)
 		err = 0;
@@ -286,14 +294,14 @@ static const struct archiver *lookup_archiver(const char *name)
 	return NULL;
 }
 
-static int reject_entry(const unsigned char *sha1, const char *base,
-			int baselen, const char *filename, unsigned mode,
+static int reject_entry(const unsigned char *sha1, struct strbuf *base,
+			const char *filename, unsigned mode,
 			int stage, void *context)
 {
 	int ret = -1;
 	if (S_ISDIR(mode)) {
 		struct strbuf sb = STRBUF_INIT;
-		strbuf_addstr(&sb, base);
+		strbuf_addbuf(&sb, base);
 		strbuf_addstr(&sb, filename);
 		if (!match_pathspec(context, sb.buf, sb.len, 0, NULL, 1))
 			ret = READ_TREE_RECURSIVE;
diff --git a/builtin/checkout.c b/builtin/checkout.c
index 5a78758036..52d6cbb0a8 100644
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -62,7 +62,7 @@ static int post_checkout_hook(struct commit *old, struct commit *new,
 
 }
 
-static int update_some(const unsigned char *sha1, const char *base, int baselen,
+static int update_some(const unsigned char *sha1, struct strbuf *base,
 		const char *pathname, unsigned mode, int stage, void *context)
 {
 	int len;
@@ -72,11 +72,11 @@ static int update_some(const unsigned char *sha1, const char *base, int baselen,
 	if (S_ISDIR(mode))
 		return READ_TREE_RECURSIVE;
 
-	len = baselen + strlen(pathname);
+	len = base->len + strlen(pathname);
 	ce = xcalloc(1, cache_entry_size(len));
 	hashcpy(ce->sha1, sha1);
-	memcpy(ce->name, base, baselen);
-	memcpy(ce->name + baselen, pathname, len - baselen);
+	memcpy(ce->name, base->buf, base->len);
+	memcpy(ce->name + base->len, pathname, len - base->len);
 	ce->ce_flags = create_ce_flags(0) | CE_UPDATE;
 	ce->ce_namelen = len;
 	ce->ce_mode = create_ce_mode(mode);
diff --git a/builtin/log.c b/builtin/log.c
index 734aab3a73..f2a9f0156d 100644
--- a/builtin/log.c
+++ b/builtin/log.c
@@ -489,7 +489,7 @@ static int show_tag_object(const unsigned char *sha1, struct rev_info *rev)
 }
 
 static int show_tree_object(const unsigned char *sha1,
-		const char *base, int baselen,
+		struct strbuf *base,
 		const char *pathname, unsigned mode, int stage, void *context)
 {
 	printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");
diff --git a/builtin/ls-tree.c b/builtin/ls-tree.c
index 51184dfa2e..3b04a0f082 100644
--- a/builtin/ls-tree.c
+++ b/builtin/ls-tree.c
@@ -61,10 +61,11 @@ static int show_recursive(const char *base, int baselen, const char *pathname)
 	}
 }
 
-static int show_tree(const unsigned char *sha1, const char *base, int baselen,
+static int show_tree(const unsigned char *sha1, struct strbuf *base,
 		const char *pathname, unsigned mode, int stage, void *context)
 {
 	int retval = 0;
+	int baselen;
 	const char *type = blob_type;
 
 	if (S_ISGITLINK(mode)) {
@@ -79,7 +80,7 @@ static int show_tree(const unsigned char *sha1, const char *base, int baselen,
 		 */
 		type = commit_type;
 	} else if (S_ISDIR(mode)) {
-		if (show_recursive(base, baselen, pathname)) {
+		if (show_recursive(base->buf, base->len, pathname)) {
 			retval = READ_TREE_RECURSIVE;
 			if (!(ls_options & LS_SHOW_TREES))
 				return retval;
@@ -89,10 +90,6 @@ static int show_tree(const unsigned char *sha1, const char *base, int baselen,
 	else if (ls_options & LS_TREE_ONLY)
 		return 0;
 
-	if (chomp_prefix &&
-	    (baselen < chomp_prefix || memcmp(ls_tree_prefix, base, chomp_prefix)))
-		return 0;
-
 	if (!(ls_options & LS_NAME_ONLY)) {
 		if (ls_options & LS_SHOW_SIZE) {
 			char size_text[24];
@@ -112,8 +109,12 @@ static int show_tree(const unsigned char *sha1, const char *base, int baselen,
 			printf("%06o %s %s\t", mode, type,
 			       find_unique_abbrev(sha1, abbrev));
 	}
-	write_name_quotedpfx(base + chomp_prefix, baselen - chomp_prefix,
-			  pathname, stdout, line_termination);
+	baselen = base->len;
+	strbuf_addstr(base, pathname);
+	write_name_quoted_relative(base->buf,
+				   chomp_prefix ? ls_tree_prefix : NULL,
+				   stdout, line_termination);
+	strbuf_setlen(base, baselen);
 	return retval;
 }
 
@@ -173,7 +174,8 @@ int cmd_ls_tree(int argc, const char **argv, const char *prefix)
 	 * cannot be lifted until it is converted to use
 	 * match_pathspec() or tree_entry_interesting()
 	 */
-	parse_pathspec(&pathspec, PATHSPEC_GLOB | PATHSPEC_ICASE,
+	parse_pathspec(&pathspec, PATHSPEC_GLOB | PATHSPEC_ICASE |
+				  PATHSPEC_EXCLUDE,
 		       PATHSPEC_PREFER_CWD,
 		       prefix, argv + 1);
 	for (i = 0; i < pathspec.nr; i++)
diff --git a/merge-recursive.c b/merge-recursive.c
index fdb7d0f10b..25c067e4a7 100644
--- a/merge-recursive.c
+++ b/merge-recursive.c
@@ -275,23 +275,20 @@ struct tree *write_tree_from_memory(struct merge_options *o)
 }
 
 static int save_files_dirs(const unsigned char *sha1,
-		const char *base, int baselen, const char *path,
+		struct strbuf *base, const char *path,
 		unsigned int mode, int stage, void *context)
 {
-	int len = strlen(path);
-	char *newpath = xmalloc(baselen + len + 1);
+	int baselen = base->len;
 	struct merge_options *o = context;
 
-	memcpy(newpath, base, baselen);
-	memcpy(newpath + baselen, path, len);
-	newpath[baselen + len] = '\0';
+	strbuf_addstr(base, path);
 
 	if (S_ISDIR(mode))
-		string_list_insert(&o->current_directory_set, newpath);
+		string_list_insert(&o->current_directory_set, base->buf);
 	else
-		string_list_insert(&o->current_file_set, newpath);
-	free(newpath);
+		string_list_insert(&o->current_file_set, base->buf);
 
+	strbuf_setlen(base, baselen);
 	return (S_ISDIR(mode) ? READ_TREE_RECURSIVE : 0);
 }
 
diff --git a/quote.c b/quote.c
index 45e3db12d5..7920e18e44 100644
--- a/quote.c
+++ b/quote.c
@@ -274,27 +274,6 @@ void write_name_quoted(const char *name, FILE *fp, int terminator)
 	fputc(terminator, fp);
 }
 
-void write_name_quotedpfx(const char *pfx, size_t pfxlen,
-			  const char *name, FILE *fp, int terminator)
-{
-	int needquote = 0;
-
-	if (terminator) {
-		needquote = next_quote_pos(pfx, pfxlen) < pfxlen
-			|| name[next_quote_pos(name, -1)];
-	}
-	if (needquote) {
-		fputc('"', fp);
-		quote_c_style_counted(pfx, pfxlen, NULL, fp, 1);
-		quote_c_style(name, NULL, fp, 1);
-		fputc('"', fp);
-	} else {
-		fwrite(pfx, pfxlen, 1, fp);
-		fputs(name, fp);
-	}
-	fputc(terminator, fp);
-}
-
 void write_name_quoted_relative(const char *name, const char *prefix,
 				FILE *fp, int terminator)
 {
diff --git a/quote.h b/quote.h
index 71dcc3aa02..99e04d34bf 100644
--- a/quote.h
+++ b/quote.h
@@ -56,8 +56,6 @@ extern size_t quote_c_style(const char *name, struct strbuf *, FILE *, int no_dq
 extern void quote_two_c_style(struct strbuf *, const char *, const char *, int);
 
 extern void write_name_quoted(const char *name, FILE *, int terminator);
-extern void write_name_quotedpfx(const char *pfx, size_t pfxlen,
-                                 const char *name, FILE *, int terminator);
 extern void write_name_quoted_relative(const char *name, const char *prefix,
 		FILE *fp, int terminator);
 
diff --git a/t/t3102-ls-tree-wildcards.sh b/t/t3102-ls-tree-wildcards.sh
index c286854485..4d4b02e760 100755
--- a/t/t3102-ls-tree-wildcards.sh
+++ b/t/t3102-ls-tree-wildcards.sh
@@ -12,11 +12,25 @@ test_expect_success 'setup' '
 '
 
 test_expect_success 'ls-tree a[a] matches literally' '
-	cat >expected <<EOF &&
-100644 blob e69de29bb2d1d6434b8b29ae775ad8c2e48c5391	a[a]/three
-EOF
+	cat >expect <<-\EOF &&
+	100644 blob e69de29bb2d1d6434b8b29ae775ad8c2e48c5391	a[a]/three
+	EOF
 	git ls-tree -r HEAD "a[a]" >actual &&
-	test_cmp expected actual
+	test_cmp expect actual
+'
+
+test_expect_success 'ls-tree outside prefix' '
+	cat >expect <<-\EOF &&
+	100644 blob e69de29bb2d1d6434b8b29ae775ad8c2e48c5391	../a[a]/three
+	EOF
+	( cd aa && git ls-tree -r HEAD "../a[a]"; ) >actual &&
+	test_cmp expect actual
+'
+
+test_expect_failure 'ls-tree does not yet support negated pathspec' '
+	git ls-files ":(exclude)a" "a*" >expect &&
+	git ls-tree --name-only -r HEAD ":(exclude)a" "a*" >actual &&
+	test_cmp expect actual
 '
 
 test_done
diff --git a/tree.c b/tree.c
index bb02c1caa4..58ebfce1bc 100644
--- a/tree.c
+++ b/tree.c
@@ -30,9 +30,12 @@ static int read_one_entry_opt(const unsigned char *sha1, const char *base, int b
 	return add_cache_entry(ce, opt);
 }
 
-static int read_one_entry(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage, void *context)
+static int read_one_entry(const unsigned char *sha1, struct strbuf *base,
+			  const char *pathname, unsigned mode, int stage,
+			  void *context)
 {
-	return read_one_entry_opt(sha1, base, baselen, pathname, mode, stage,
+	return read_one_entry_opt(sha1, base->buf, base->len, pathname,
+				  mode, stage,
 				  ADD_CACHE_OK_TO_ADD|ADD_CACHE_SKIP_DFCHECK);
 }
 
@@ -40,9 +43,12 @@ static int read_one_entry(const unsigned char *sha1, const char *base, int basel
  * This is used when the caller knows there is no existing entries at
  * the stage that will conflict with the entry being added.
  */
-static int read_one_entry_quick(const unsigned char *sha1, const char *base, int baselen, const char *pathname, unsigned mode, int stage, void *context)
+static int read_one_entry_quick(const unsigned char *sha1, struct strbuf *base,
+				const char *pathname, unsigned mode, int stage,
+				void *context)
 {
-	return read_one_entry_opt(sha1, base, baselen, pathname, mode, stage,
+	return read_one_entry_opt(sha1, base->buf, base->len, pathname,
+				  mode, stage,
 				  ADD_CACHE_JUST_APPEND);
 }
 
@@ -70,7 +76,7 @@ static int read_tree_1(struct tree *tree, struct strbuf *base,
 				continue;
 		}
 
-		switch (fn(entry.sha1, base->buf, base->len,
+		switch (fn(entry.sha1, base,
 			   entry.path, entry.mode, stage, context)) {
 		case 0:
 			continue;
diff --git a/tree.h b/tree.h
index d84ac63e51..d24125f84f 100644
--- a/tree.h
+++ b/tree.h
@@ -4,6 +4,7 @@
 #include "object.h"
 
 extern const char *tree_type;
+struct strbuf;
 
 struct tree {
 	struct object object;
@@ -22,7 +23,7 @@ void free_tree_buffer(struct tree *tree);
 struct tree *parse_tree_indirect(const unsigned char *sha1);
 
 #define READ_TREE_RECURSIVE 1
-typedef int (*read_tree_fn_t)(const unsigned char *, const char *, int, const char *, unsigned int, int, void *);
+typedef int (*read_tree_fn_t)(const unsigned char *, struct strbuf *, const char *, unsigned int, int, void *);
 
 extern int read_tree_recursive(struct tree *tree,
 			       const char *base, int baselen,