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ls-tree: split up "fast path" callbacks

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Make the various if/else in the callbacks for the "fast path" a lot
easier to read by just using common functions for the parts that are
common, and have per-format callbacks for those parts that are
different.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Teng Long <dyroneteng@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Ævar Arnfjörð Bjarmason 2022-03-23 17:13:15 +08:00 committed by Junio C Hamano
parent 0f88783592
commit 9c4d58ff2c
1 changed files with 125 additions and 74 deletions
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199
builtin/ls-tree.c
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@ -173,108 +173,157 @@ static int show_tree_fmt(const struct object_id *oid, struct strbuf *base,
return recurse;
}
static int show_default(struct show_tree_data *data)
static int show_tree_common(struct show_tree_data *data, int *recurse,
const struct object_id *oid, struct strbuf *base,
const char *pathname, unsigned mode)
{
size_t baselen = data->base->len;
if (cmdmode == MODE_LONG) {
char size_text[24];
if (data->type == OBJ_BLOB) {
unsigned long size;
if (oid_object_info(the_repository, data->oid, &size) == OBJ_BAD)
xsnprintf(size_text, sizeof(size_text), "BAD");
else
xsnprintf(size_text, sizeof(size_text),
"%" PRIuMAX, (uintmax_t)size);
} else {
xsnprintf(size_text, sizeof(size_text), "-");
}
printf("%06o %s %s %7s\t", data->mode, type_name(data->type),
find_unique_abbrev(data->oid, abbrev), size_text);
} else {
printf("%06o %s %s\t", data->mode, type_name(data->type),
find_unique_abbrev(data->oid, abbrev));
}
baselen = data->base->len;
strbuf_addstr(data->base, data->pathname);
write_name_quoted_relative(data->base->buf,
chomp_prefix ? ls_tree_prefix : NULL, stdout,
line_termination);
strbuf_setlen(data->base, baselen);
return 1;
}
static int show_tree(const struct object_id *oid, struct strbuf *base,
const char *pathname, unsigned mode, void *context)
{
int recurse = 0;
size_t baselen;
enum object_type type = object_type(mode);
struct show_tree_data data = {
.mode = mode,
.type = type,
.oid = oid,
.pathname = pathname,
.base = base,
};
int ret = -1;
*recurse = 0;
data->mode = mode;
data->type = type;
data->oid = oid;
data->pathname = pathname;
data->base = base;
if (type == OBJ_BLOB) {
if (ls_options & LS_TREE_ONLY)
return 0;
ret = 0;
} else if (type == OBJ_TREE &&
show_recursive(base->buf, base->len, pathname)) {
recurse = READ_TREE_RECURSIVE;
*recurse = READ_TREE_RECURSIVE;
if (!(ls_options & LS_SHOW_TREES))
return recurse;
ret = *recurse;
}
if (cmdmode == MODE_OBJECT_ONLY) {
printf("%s%c", find_unique_abbrev(oid, abbrev), line_termination);
return recurse;
return ret;
}
static void show_tree_common_default_long(struct strbuf *base,
const char *pathname,
const size_t baselen)
{
strbuf_addstr(base, pathname);
write_name_quoted_relative(base->buf,
chomp_prefix ? ls_tree_prefix : NULL, stdout,
line_termination);
strbuf_setlen(base, baselen);
}
static int show_tree_default(const struct object_id *oid, struct strbuf *base,
const char *pathname, unsigned mode,
void *context)
{
int early;
int recurse;
struct show_tree_data data = { 0 };
early = show_tree_common(&data, &recurse, oid, base, pathname, mode);
if (early >= 0)
return early;
printf("%06o %s %s\t", data.mode, type_name(data.type),
find_unique_abbrev(data.oid, abbrev));
show_tree_common_default_long(base, pathname, data.base->len);
return recurse;
}
static int show_tree_long(const struct object_id *oid, struct strbuf *base,
const char *pathname, unsigned mode, void *context)
{
int early;
int recurse;
struct show_tree_data data = { 0 };
char size_text[24];
early = show_tree_common(&data, &recurse, oid, base, pathname, mode);
if (early >= 0)
return early;
if (data.type == OBJ_BLOB) {
unsigned long size;
if (oid_object_info(the_repository, data.oid, &size) == OBJ_BAD)
xsnprintf(size_text, sizeof(size_text), "BAD");
else
xsnprintf(size_text, sizeof(size_text),
"%" PRIuMAX, (uintmax_t)size);
} else {
xsnprintf(size_text, sizeof(size_text), "-");
}
if (cmdmode == MODE_NAME_ONLY) {
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 recurse;
}
printf("%06o %s %s %7s\t", data.mode, type_name(data.type),
find_unique_abbrev(data.oid, abbrev), size_text);
show_tree_common_default_long(base, pathname, data.base->len);
return 1;
}
if (cmdmode == MODE_LONG ||
(!ls_options || (ls_options & LS_RECURSIVE)
|| (ls_options & LS_SHOW_TREES)
|| (ls_options & LS_TREE_ONLY)))
show_default(&data);
static int show_tree_name_only(const struct object_id *oid, struct strbuf *base,
const char *pathname, unsigned mode, void *context)
{
int early;
int recurse;
const size_t baselen = base->len;
struct show_tree_data data = { 0 };
early = show_tree_common(&data, &recurse, oid, base, pathname, mode);
if (early >= 0)
return early;
strbuf_addstr(base, pathname);
write_name_quoted_relative(base->buf,
chomp_prefix ? ls_tree_prefix : NULL,
stdout, line_termination);
strbuf_setlen(base, baselen);
return recurse;
}
static int show_tree_object(const struct object_id *oid, struct strbuf *base,
const char *pathname, unsigned mode, void *context)
{
int early;
int recurse;
struct show_tree_data data = { 0 };
early = show_tree_common(&data, &recurse, oid, base, pathname, mode);
if (early >= 0)
return early;
printf("%s%c", find_unique_abbrev(oid, abbrev), line_termination);
return recurse;
}
struct ls_tree_cmdmode_to_fmt {
enum ls_tree_cmdmode mode;
const char *const fmt;
read_tree_fn_t fn;
};
static struct ls_tree_cmdmode_to_fmt ls_tree_cmdmode_format[] = {
{
.mode = MODE_DEFAULT,
.fmt = "%(objectmode) %(objecttype) %(objectname)%x09%(path)",
.fn = show_tree_default,
},
{
.mode = MODE_LONG,
.fmt = "%(objectmode) %(objecttype) %(objectname) %(objectsize:padded)%x09%(path)",
.fn = show_tree_long,
},
{
.mode = MODE_NAME_ONLY, /* And MODE_NAME_STATUS */
.fmt = "%(path)",
.fn = show_tree_name_only,
},
{
.mode = MODE_OBJECT_ONLY,
.fmt = "%(objectname)",
.fn = show_tree_object
},
{
/* fallback */
.fn = show_tree_default,
},
{ 0 },
};
int cmd_ls_tree(int argc, const char **argv, const char *prefix)
@ -282,7 +331,7 @@ int cmd_ls_tree(int argc, const char **argv, const char *prefix)
struct object_id oid;
struct tree *tree;
int i, full_tree = 0;
read_tree_fn_t fn = show_tree;
read_tree_fn_t fn = NULL;
const struct option ls_tree_options[] = {
OPT_BIT('d', NULL, &ls_options, N_("only show trees"),
LS_TREE_ONLY),
@ -311,6 +360,7 @@ int cmd_ls_tree(int argc, const char **argv, const char *prefix)
OPT__ABBREV(&abbrev),
OPT_END()
};
struct ls_tree_cmdmode_to_fmt *m2f = ls_tree_cmdmode_format;
git_config(git_default_config, NULL);
ls_tree_prefix = prefix;
@ -365,18 +415,19 @@ int cmd_ls_tree(int argc, const char **argv, const char *prefix)
* The generic show_tree_fmt() is slower than show_tree(), so
* take the fast path if possible.
*/
if (format) {
struct ls_tree_cmdmode_to_fmt *m2f;
fn = show_tree_fmt;
for (m2f = ls_tree_cmdmode_format; m2f->fmt; m2f++) {
if (strcmp(format, m2f->fmt))
continue;
while (m2f) {
if (!m2f->fmt) {
fn = format ? show_tree_fmt : show_tree_default;
} else if (format && !strcmp(format, m2f->fmt)) {
cmdmode = m2f->mode;
fn = show_tree;
break;
fn = m2f->fn;
} else if (!format && cmdmode == m2f->mode) {
fn = m2f->fn;
} else {
m2f++;
continue;
}
break;
}
return !!read_tree(the_repository, tree, &pathspec, fn, NULL);