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ls-tree: fix expansion of repeated %(path) 

expand_show_tree() borrows the base strbuf given to us by read_tree() to
build the full path of the current entry when handling %(path).  Only
its indirect caller, show_tree_fmt(), removes the added entry name.
That works fine as long as %(path) is only included once in the format
string, but accumulates duplicates if it's repeated:

   $ git ls-tree --format='%(path) %(path) %(path)' HEAD M*
   Makefile MakefileMakefile MakefileMakefileMakefile

Reset the length after each use to get the same expansion every time;
here's the behavior with this patch:

   $ ./git ls-tree --format='%(path) %(path) %(path)' HEAD M*
   Makefile Makefile Makefile

Signed-off-by: René Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
René Scharfe 2023-01-14 15:37:53 +01:00 committed by Junio C Hamano
parent 455923e0a1
commit 16fb5c54bd
2 changed files with 9 additions and 3 deletions
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6
builtin/ls-tree.c
View File

@ -97,9 +97,12 @@ static size_t expand_show_tree(struct strbuf *sb, const char *start,
const char *prefix = chomp_prefix ? ls_tree_prefix : NULL;
struct strbuf quoted = STRBUF_INIT;
struct strbuf sbuf = STRBUF_INIT;
size_t baselen = data->base->len;
strbuf_addstr(data->base, data->pathname);
name = relative_path(data->base->buf, prefix, &sbuf);
quote_c_style(name, &quoted, NULL, 0);
strbuf_setlen(data->base, baselen);
strbuf_addbuf(sb, &quoted);
strbuf_release(&sbuf);
strbuf_release(&quoted);
@ -143,7 +146,6 @@ static int show_recursive(const char *base, size_t baselen, const char *pathname
static int show_tree_fmt(const struct object_id *oid, struct strbuf *base,
const char *pathname, unsigned mode, void *context)
{
size_t baselen;
int recurse = 0;
struct strbuf sb = STRBUF_INIT;
enum object_type type = object_type(mode);
@ -163,12 +165,10 @@ static int show_tree_fmt(const struct object_id *oid, struct strbuf *base,
if (type == OBJ_BLOB && (ls_options & LS_TREE_ONLY))
return 0;
baselen = base->len;
strbuf_expand(&sb, format, expand_show_tree, &data);
strbuf_addch(&sb, line_termination);
fwrite(sb.buf, sb.len, 1, stdout);
strbuf_release(&sb);
strbuf_setlen(base, baselen);
return recurse;
}

6
t/t3104-ls-tree-format.sh
View File

@ -37,6 +37,12 @@ test_ls_tree_format () {
'
}
test_expect_success "ls-tree --format='%(path) %(path) %(path)' HEAD top-file" '
git ls-tree --format="%(path) %(path) %(path)" HEAD top-file.t >actual &&
echo top-file.t top-file.t top-file.t >expect &&
test_cmp expect actual
'
test_ls_tree_format \
"%(objectmode) %(objecttype) %(objectname)%x09%(path)" \
""