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-rw-r--r--attr.c103
1 files changed, 67 insertions, 36 deletions
diff --git a/attr.c b/attr.c
index 4ef85d668b..79adaa50ea 100644
--- a/attr.c
+++ b/attr.c
@@ -14,6 +14,7 @@
#include "utf8.h"
#include "quote.h"
#include "thread-utils.h"
+#include "dir.h"
const char git_attr__true[] = "(builtin)true";
const char git_attr__false[] = "\0(builtin)false";
@@ -278,6 +279,10 @@ struct match_attr {
static const char blank[] = " \t\r\n";
+/* Flags usable in read_attr() and parse_attr_line() family of functions. */
+#define READ_ATTR_MACRO_OK (1<<0)
+#define READ_ATTR_NOFOLLOW (1<<1)
+
/*
* Parse a whitespace-delimited attribute state (i.e., "attr",
* "-attr", "!attr", or "attr=value") from the string starting at src.
@@ -331,7 +336,7 @@ static const char *parse_attr(const char *src, int lineno, const char *cp,
}
static struct match_attr *parse_attr_line(const char *line, const char *src,
- int lineno, int macro_ok)
+ int lineno, unsigned flags)
{
int namelen;
int num_attr, i;
@@ -355,7 +360,7 @@ static struct match_attr *parse_attr_line(const char *line, const char *src,
if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&
starts_with(name, ATTRIBUTE_MACRO_PREFIX)) {
- if (!macro_ok) {
+ if (!(flags & READ_ATTR_MACRO_OK)) {
fprintf_ln(stderr, _("%s not allowed: %s:%d"),
name, src, lineno);
goto fail_return;
@@ -569,7 +574,7 @@ struct attr_check *attr_check_initl(const char *one, ...)
check = attr_check_alloc();
check->nr = cnt;
check->alloc = cnt;
- check->items = xcalloc(cnt, sizeof(struct attr_check_item));
+ CALLOC_ARRAY(check->items, cnt);
check->items[0].attr = git_attr(one);
va_start(params, one);
@@ -653,11 +658,11 @@ static void handle_attr_line(struct attr_stack *res,
const char *line,
const char *src,
int lineno,
- int macro_ok)
+ unsigned flags)
{
struct match_attr *a;
- a = parse_attr_line(line, src, lineno, macro_ok);
+ a = parse_attr_line(line, src, lineno, flags);
if (!a)
return;
ALLOC_GROW(res->attrs, res->num_matches + 1, res->alloc);
@@ -670,9 +675,10 @@ static struct attr_stack *read_attr_from_array(const char **list)
const char *line;
int lineno = 0;
- res = xcalloc(1, sizeof(*res));
+ CALLOC_ARRAY(res, 1);
while ((line = *(list++)) != NULL)
- handle_attr_line(res, line, "[builtin]", ++lineno, 1);
+ handle_attr_line(res, line, "[builtin]", ++lineno,
+ READ_ATTR_MACRO_OK);
return res;
}
@@ -680,7 +686,7 @@ static struct attr_stack *read_attr_from_array(const char **list)
* Callers into the attribute system assume there is a single, system-wide
* global state where attributes are read from and when the state is flipped by
* calling git_attr_set_direction(), the stack frames that have been
- * constructed need to be discarded so so that subsequent calls into the
+ * constructed need to be discarded so that subsequent calls into the
* attribute system will lazily read from the right place. Since changing
* direction causes a global paradigm shift, it should not ever be called while
* another thread could potentially be calling into the attribute system.
@@ -698,29 +704,39 @@ void git_attr_set_direction(enum git_attr_direction new_direction)
direction = new_direction;
}
-static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
+static struct attr_stack *read_attr_from_file(const char *path, unsigned flags)
{
- FILE *fp = fopen_or_warn(path, "r");
+ int fd;
+ FILE *fp;
struct attr_stack *res;
char buf[2048];
int lineno = 0;
- if (!fp)
+ if (flags & READ_ATTR_NOFOLLOW)
+ fd = open_nofollow(path, O_RDONLY);
+ else
+ fd = open(path, O_RDONLY);
+
+ if (fd < 0) {
+ warn_on_fopen_errors(path);
return NULL;
- res = xcalloc(1, sizeof(*res));
+ }
+ fp = xfdopen(fd, "r");
+
+ CALLOC_ARRAY(res, 1);
while (fgets(buf, sizeof(buf), fp)) {
char *bufp = buf;
if (!lineno)
skip_utf8_bom(&bufp, strlen(bufp));
- handle_attr_line(res, bufp, path, ++lineno, macro_ok);
+ handle_attr_line(res, bufp, path, ++lineno, flags);
}
fclose(fp);
return res;
}
-static struct attr_stack *read_attr_from_index(const struct index_state *istate,
+static struct attr_stack *read_attr_from_index(struct index_state *istate,
const char *path,
- int macro_ok)
+ unsigned flags)
{
struct attr_stack *res;
char *buf, *sp;
@@ -729,11 +745,25 @@ static struct attr_stack *read_attr_from_index(const struct index_state *istate,
if (!istate)
return NULL;
+ /*
+ * The .gitattributes file only applies to files within its
+ * parent directory. In the case of cone-mode sparse-checkout,
+ * the .gitattributes file is sparse if and only if all paths
+ * within that directory are also sparse. Thus, don't load the
+ * .gitattributes file since it will not matter.
+ *
+ * In the case of a sparse index, it is critical that we don't go
+ * looking for a .gitattributes file, as doing so would cause the
+ * index to expand.
+ */
+ if (!path_in_cone_mode_sparse_checkout(path, istate))
+ return NULL;
+
buf = read_blob_data_from_index(istate, path, NULL);
if (!buf)
return NULL;
- res = xcalloc(1, sizeof(*res));
+ CALLOC_ARRAY(res, 1);
for (sp = buf; *sp; ) {
char *ep;
int more;
@@ -741,27 +771,27 @@ static struct attr_stack *read_attr_from_index(const struct index_state *istate,
ep = strchrnul(sp, '\n');
more = (*ep == '\n');
*ep = '\0';
- handle_attr_line(res, sp, path, ++lineno, macro_ok);
+ handle_attr_line(res, sp, path, ++lineno, flags);
sp = ep + more;
}
free(buf);
return res;
}
-static struct attr_stack *read_attr(const struct index_state *istate,
- const char *path, int macro_ok)
+static struct attr_stack *read_attr(struct index_state *istate,
+ const char *path, unsigned flags)
{
struct attr_stack *res = NULL;
if (direction == GIT_ATTR_INDEX) {
- res = read_attr_from_index(istate, path, macro_ok);
+ res = read_attr_from_index(istate, path, flags);
} else if (!is_bare_repository()) {
if (direction == GIT_ATTR_CHECKOUT) {
- res = read_attr_from_index(istate, path, macro_ok);
+ res = read_attr_from_index(istate, path, flags);
if (!res)
- res = read_attr_from_file(path, macro_ok);
+ res = read_attr_from_file(path, flags);
} else if (direction == GIT_ATTR_CHECKIN) {
- res = read_attr_from_file(path, macro_ok);
+ res = read_attr_from_file(path, flags);
if (!res)
/*
* There is no checked out .gitattributes file
@@ -769,12 +799,12 @@ static struct attr_stack *read_attr(const struct index_state *istate,
* We allow operation in a sparsely checked out
* work tree, so read from it.
*/
- res = read_attr_from_index(istate, path, macro_ok);
+ res = read_attr_from_index(istate, path, flags);
}
}
if (!res)
- res = xcalloc(1, sizeof(*res));
+ CALLOC_ARRAY(res, 1);
return res;
}
@@ -840,10 +870,11 @@ static void push_stack(struct attr_stack **attr_stack_p,
}
}
-static void bootstrap_attr_stack(const struct index_state *istate,
+static void bootstrap_attr_stack(struct index_state *istate,
struct attr_stack **stack)
{
struct attr_stack *e;
+ unsigned flags = READ_ATTR_MACRO_OK;
if (*stack)
return;
@@ -854,31 +885,31 @@ static void bootstrap_attr_stack(const struct index_state *istate,
/* system-wide frame */
if (git_attr_system()) {
- e = read_attr_from_file(git_etc_gitattributes(), 1);
+ e = read_attr_from_file(git_etc_gitattributes(), flags);
push_stack(stack, e, NULL, 0);
}
/* home directory */
if (get_home_gitattributes()) {
- e = read_attr_from_file(get_home_gitattributes(), 1);
+ e = read_attr_from_file(get_home_gitattributes(), flags);
push_stack(stack, e, NULL, 0);
}
/* root directory */
- e = read_attr(istate, GITATTRIBUTES_FILE, 1);
+ e = read_attr(istate, GITATTRIBUTES_FILE, flags | READ_ATTR_NOFOLLOW);
push_stack(stack, e, xstrdup(""), 0);
/* info frame */
if (startup_info->have_repository)
- e = read_attr_from_file(git_path_info_attributes(), 1);
+ e = read_attr_from_file(git_path_info_attributes(), flags);
else
e = NULL;
if (!e)
- e = xcalloc(1, sizeof(struct attr_stack));
+ CALLOC_ARRAY(e, 1);
push_stack(stack, e, NULL, 0);
}
-static void prepare_attr_stack(const struct index_state *istate,
+static void prepare_attr_stack(struct index_state *istate,
const char *path, int dirlen,
struct attr_stack **stack)
{
@@ -956,7 +987,7 @@ static void prepare_attr_stack(const struct index_state *istate,
strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len));
strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE);
- next = read_attr(istate, pathbuf.buf, 0);
+ next = read_attr(istate, pathbuf.buf, READ_ATTR_NOFOLLOW);
/* reset the pathbuf to not include "/.gitattributes" */
strbuf_setlen(&pathbuf, len);
@@ -1078,7 +1109,7 @@ static void determine_macros(struct all_attrs_item *all_attrs,
* If check->check_nr is non-zero, only attributes in check[] are collected.
* Otherwise all attributes are collected.
*/
-static void collect_some_attrs(const struct index_state *istate,
+static void collect_some_attrs(struct index_state *istate,
const char *path,
struct attr_check *check)
{
@@ -1107,7 +1138,7 @@ static void collect_some_attrs(const struct index_state *istate,
fill(path, pathlen, basename_offset, check->stack, check->all_attrs, rem);
}
-void git_check_attr(const struct index_state *istate,
+void git_check_attr(struct index_state *istate,
const char *path,
struct attr_check *check)
{
@@ -1124,7 +1155,7 @@ void git_check_attr(const struct index_state *istate,
}
}
-void git_all_attrs(const struct index_state *istate,
+void git_all_attrs(struct index_state *istate,
const char *path, struct attr_check *check)
{
int i;
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 09:37:18 +0000