#include "attr.h"
#include "dir.h"
#include "utf8.h"
+#include "quote.h"
+#include "thread-utils.h"
const char git_attr__true[] = "(builtin)true";
const char git_attr__false[] = "\0(builtin)false";
#define ATTR__UNSET NULL
#define ATTR__UNKNOWN git_attr__unknown
-/* This is a randomly chosen prime. */
-#define HASHSIZE 257
-
#ifndef DEBUG_ATTR
#define DEBUG_ATTR 0
#endif
struct git_attr {
- struct git_attr *next;
- unsigned h;
- int attr_nr;
- int maybe_macro;
- int maybe_real;
- char name[FLEX_ARRAY];
+ int attr_nr; /* unique attribute number */
+ char name[FLEX_ARRAY]; /* attribute name */
};
-static int attr_nr;
-static int cannot_trust_maybe_real;
-
-static struct git_attr_check *check_all_attr;
-static struct git_attr *(git_attr_hash[HASHSIZE]);
-char *git_attr_name(struct git_attr *attr)
+const char *git_attr_name(const struct git_attr *attr)
{
return attr->name;
}
-static unsigned hash_name(const char *name, int namelen)
+struct attr_hashmap {
+ struct hashmap map;
+#ifndef NO_PTHREADS
+ pthread_mutex_t mutex;
+#endif
+};
+
+static inline void hashmap_lock(struct attr_hashmap *map)
{
- unsigned val = 0, c;
+#ifndef NO_PTHREADS
+ pthread_mutex_lock(&map->mutex);
+#endif
+}
- while (namelen--) {
- c = *name++;
- val = ((val << 7) | (val >> 22)) ^ c;
+static inline void hashmap_unlock(struct attr_hashmap *map)
+{
+#ifndef NO_PTHREADS
+ pthread_mutex_unlock(&map->mutex);
+#endif
+}
+
+/*
+ * The global dictionary of all interned attributes. This
+ * is a singleton object which is shared between threads.
+ * Access to this dictionary must be surrounded with a mutex.
+ */
+static struct attr_hashmap g_attr_hashmap;
+
+/* The container for objects stored in "struct attr_hashmap" */
+struct attr_hash_entry {
+ struct hashmap_entry ent; /* must be the first member! */
+ const char *key; /* the key; memory should be owned by value */
+ size_t keylen; /* length of the key */
+ void *value; /* the stored value */
+};
+
+/* attr_hashmap comparison function */
+static int attr_hash_entry_cmp(const struct attr_hash_entry *a,
+ const struct attr_hash_entry *b,
+ void *unused)
+{
+ return (a->keylen != b->keylen) || strncmp(a->key, b->key, a->keylen);
+}
+
+/* Initialize an 'attr_hashmap' object */
+static void attr_hashmap_init(struct attr_hashmap *map)
+{
+ hashmap_init(&map->map, (hashmap_cmp_fn) attr_hash_entry_cmp, 0);
+}
+
+/*
+ * Retrieve the 'value' stored in a hashmap given the provided 'key'.
+ * If there is no matching entry, return NULL.
+ */
+static void *attr_hashmap_get(struct attr_hashmap *map,
+ const char *key, size_t keylen)
+{
+ struct attr_hash_entry k;
+ struct attr_hash_entry *e;
+
+ if (!map->map.tablesize)
+ attr_hashmap_init(map);
+
+ hashmap_entry_init(&k, memhash(key, keylen));
+ k.key = key;
+ k.keylen = keylen;
+ e = hashmap_get(&map->map, &k, NULL);
+
+ return e ? e->value : NULL;
+}
+
+/* Add 'value' to a hashmap based on the provided 'key'. */
+static void attr_hashmap_add(struct attr_hashmap *map,
+ const char *key, size_t keylen,
+ void *value)
+{
+ struct attr_hash_entry *e;
+
+ if (!map->map.tablesize)
+ attr_hashmap_init(map);
+
+ e = xmalloc(sizeof(struct attr_hash_entry));
+ hashmap_entry_init(e, memhash(key, keylen));
+ e->key = key;
+ e->keylen = keylen;
+ e->value = value;
+
+ hashmap_add(&map->map, e);
+}
+
+struct all_attrs_item {
+ const struct git_attr *attr;
+ const char *value;
+ /*
+ * If 'macro' is non-NULL, indicates that 'attr' is a macro based on
+ * the current attribute stack and contains a pointer to the match_attr
+ * definition of the macro
+ */
+ const struct match_attr *macro;
+};
+
+/*
+ * Reallocate and reinitialize the array of all attributes (which is used in
+ * the attribute collection process) in 'check' based on the global dictionary
+ * of attributes.
+ */
+static void all_attrs_init(struct attr_hashmap *map, struct attr_check *check)
+{
+ int i;
+
+ hashmap_lock(map);
+
+ if (map->map.size < check->all_attrs_nr)
+ die("BUG: interned attributes shouldn't be deleted");
+
+ /*
+ * If the number of attributes in the global dictionary has increased
+ * (or this attr_check instance doesn't have an initialized all_attrs
+ * field), reallocate the provided attr_check instance's all_attrs
+ * field and fill each entry with its corresponding git_attr.
+ */
+ if (map->map.size != check->all_attrs_nr) {
+ struct attr_hash_entry *e;
+ struct hashmap_iter iter;
+ hashmap_iter_init(&map->map, &iter);
+
+ REALLOC_ARRAY(check->all_attrs, map->map.size);
+ check->all_attrs_nr = map->map.size;
+
+ while ((e = hashmap_iter_next(&iter))) {
+ const struct git_attr *a = e->value;
+ check->all_attrs[a->attr_nr].attr = a;
+ }
+ }
+
+ hashmap_unlock(map);
+
+ /*
+ * Re-initialize every entry in check->all_attrs.
+ * This re-initialization can live outside of the locked region since
+ * the attribute dictionary is no longer being accessed.
+ */
+ for (i = 0; i < check->all_attrs_nr; i++) {
+ check->all_attrs[i].value = ATTR__UNKNOWN;
+ check->all_attrs[i].macro = NULL;
}
- return val;
}
-static int invalid_attr_name(const char *name, int namelen)
+static int attr_name_valid(const char *name, size_t namelen)
{
/*
* Attribute name cannot begin with '-' and must consist of
* characters from [-A-Za-z0-9_.].
*/
if (namelen <= 0 || *name == '-')
- return -1;
+ return 0;
while (namelen--) {
char ch = *name++;
if (! (ch == '-' || ch == '.' || ch == '_' ||
('0' <= ch && ch <= '9') ||
('a' <= ch && ch <= 'z') ||
('A' <= ch && ch <= 'Z')) )
- return -1;
+ return 0;
}
- return 0;
+ return 1;
+}
+
+static void report_invalid_attr(const char *name, size_t len,
+ const char *src, int lineno)
+{
+ struct strbuf err = STRBUF_INIT;
+ strbuf_addf(&err, _("%.*s is not a valid attribute name"),
+ (int) len, name);
+ fprintf(stderr, "%s: %s:%d\n", err.buf, src, lineno);
+ strbuf_release(&err);
}
-static struct git_attr *git_attr_internal(const char *name, int len)
+/*
+ * Given a 'name', lookup and return the corresponding attribute in the global
+ * dictionary. If no entry is found, create a new attribute and store it in
+ * the dictionary.
+ */
+static const struct git_attr *git_attr_internal(const char *name, int namelen)
{
- unsigned hval = hash_name(name, len);
- unsigned pos = hval % HASHSIZE;
struct git_attr *a;
- for (a = git_attr_hash[pos]; a; a = a->next) {
- if (a->h == hval &&
- !memcmp(a->name, name, len) && !a->name[len])
- return a;
+ if (!attr_name_valid(name, namelen))
+ return NULL;
+
+ hashmap_lock(&g_attr_hashmap);
+
+ a = attr_hashmap_get(&g_attr_hashmap, name, namelen);
+
+ if (!a) {
+ FLEX_ALLOC_MEM(a, name, name, namelen);
+ a->attr_nr = g_attr_hashmap.map.size;
+
+ attr_hashmap_add(&g_attr_hashmap, a->name, namelen, a);
+ assert(a->attr_nr == (g_attr_hashmap.map.size - 1));
}
- if (invalid_attr_name(name, len))
- return NULL;
+ hashmap_unlock(&g_attr_hashmap);
- FLEX_ALLOC_MEM(a, name, name, len);
- a->h = hval;
- a->next = git_attr_hash[pos];
- a->attr_nr = attr_nr++;
- a->maybe_macro = 0;
- a->maybe_real = 0;
- git_attr_hash[pos] = a;
-
- REALLOC_ARRAY(check_all_attr, attr_nr);
- check_all_attr[a->attr_nr].attr = a;
- check_all_attr[a->attr_nr].value = ATTR__UNKNOWN;
return a;
}
-struct git_attr *git_attr(const char *name)
+const struct git_attr *git_attr(const char *name)
{
return git_attr_internal(name, strlen(name));
}
/* What does a matched pattern decide? */
struct attr_state {
- struct git_attr *attr;
+ const struct git_attr *attr;
const char *setto;
};
* If is_macro is true, then u.attr is a pointer to the git_attr being
* defined.
*
- * If is_macro is false, then u.pattern points at the filename pattern
- * to which the rule applies. (The memory pointed to is part of the
- * memory block allocated for the match_attr instance.)
+ * If is_macro is false, then u.pat is the filename pattern to which the
+ * rule applies.
*
* In either case, num_attr is the number of attributes affected by
* this rule, and state is an array listing them. The attributes are
struct match_attr {
union {
struct pattern pat;
- struct git_attr *attr;
+ const struct git_attr *attr;
} u;
char is_macro;
unsigned num_attr;
cp++;
len--;
}
- if (invalid_attr_name(cp, len)) {
- fprintf(stderr,
- "%.*s is not a valid attribute name: %s:%d\n",
- len, cp, src, lineno);
+ if (!attr_name_valid(cp, len)) {
+ report_invalid_attr(cp, len, src, lineno);
return NULL;
}
} else {
+ /*
+ * As this function is always called twice, once with
+ * e == NULL in the first pass and then e != NULL in
+ * the second pass, no need for attr_name_valid()
+ * check here.
+ */
if (*cp == '-' || *cp == '!') {
e->setto = (*cp == '-') ? ATTR__FALSE : ATTR__UNSET;
cp++;
const char *cp, *name, *states;
struct match_attr *res = NULL;
int is_macro;
+ struct strbuf pattern = STRBUF_INIT;
cp = line + strspn(line, blank);
if (!*cp || *cp == '#')
return NULL;
name = cp;
- namelen = strcspn(name, blank);
+
+ if (*cp == '"' && !unquote_c_style(&pattern, name, &states)) {
+ name = pattern.buf;
+ namelen = pattern.len;
+ } else {
+ namelen = strcspn(name, blank);
+ states = name + namelen;
+ }
+
if (strlen(ATTRIBUTE_MACRO_PREFIX) < namelen &&
starts_with(name, ATTRIBUTE_MACRO_PREFIX)) {
if (!macro_ok) {
fprintf(stderr, "%s not allowed: %s:%d\n",
name, src, lineno);
- return NULL;
+ goto fail_return;
}
is_macro = 1;
name += strlen(ATTRIBUTE_MACRO_PREFIX);
name += strspn(name, blank);
namelen = strcspn(name, blank);
- if (invalid_attr_name(name, namelen)) {
- fprintf(stderr,
- "%.*s is not a valid attribute name: %s:%d\n",
- namelen, name, src, lineno);
- return NULL;
+ if (!attr_name_valid(name, namelen)) {
+ report_invalid_attr(name, namelen, src, lineno);
+ goto fail_return;
}
}
else
is_macro = 0;
- states = name + namelen;
states += strspn(states, blank);
/* First pass to count the attr_states */
for (cp = states, num_attr = 0; *cp; num_attr++) {
cp = parse_attr(src, lineno, cp, NULL);
if (!cp)
- return NULL;
+ goto fail_return;
}
res = xcalloc(1,
(is_macro ? 0 : namelen + 1));
if (is_macro) {
res->u.attr = git_attr_internal(name, namelen);
- res->u.attr->maybe_macro = 1;
} else {
char *p = (char *)&(res->state[num_attr]);
memcpy(p, name, namelen);
if (res->u.pat.flags & EXC_FLAG_NEGATIVE) {
warning(_("Negative patterns are ignored in git attributes\n"
"Use '\\!' for literal leading exclamation."));
- return NULL;
+ goto fail_return;
}
}
res->is_macro = is_macro;
/* Second pass to fill the attr_states */
for (cp = states, i = 0; *cp; i++) {
cp = parse_attr(src, lineno, cp, &(res->state[i]));
- if (!is_macro)
- res->state[i].attr->maybe_real = 1;
- if (res->state[i].attr->maybe_macro)
- cannot_trust_maybe_real = 1;
}
+ strbuf_release(&pattern);
return res;
+
+fail_return:
+ strbuf_release(&pattern);
+ free(res);
+ return NULL;
}
/*
* directory (again, reading the file from top to bottom) down to the
* current directory, and then scan the list backwards to find the first match.
* This is exactly the same as what is_excluded() does in dir.c to deal with
- * .gitignore
+ * .gitignore file and info/excludes file as a fallback.
*/
-static struct attr_stack {
+struct attr_stack {
struct attr_stack *prev;
char *origin;
size_t originlen;
unsigned num_matches;
unsigned alloc;
struct match_attr **attrs;
-} *attr_stack;
+};
-static void free_attr_elem(struct attr_stack *e)
+static void attr_stack_free(struct attr_stack *e)
{
int i;
free(e->origin);
free(e);
}
+static void drop_attr_stack(struct attr_stack **stack)
+{
+ while (*stack) {
+ struct attr_stack *elem = *stack;
+ *stack = elem->prev;
+ attr_stack_free(elem);
+ }
+}
+
+/* List of all attr_check structs; access should be surrounded by mutex */
+static struct check_vector {
+ size_t nr;
+ size_t alloc;
+ struct attr_check **checks;
+#ifndef NO_PTHREADS
+ pthread_mutex_t mutex;
+#endif
+} check_vector;
+
+static inline void vector_lock(void)
+{
+#ifndef NO_PTHREADS
+ pthread_mutex_lock(&check_vector.mutex);
+#endif
+}
+
+static inline void vector_unlock(void)
+{
+#ifndef NO_PTHREADS
+ pthread_mutex_unlock(&check_vector.mutex);
+#endif
+}
+
+static void check_vector_add(struct attr_check *c)
+{
+ vector_lock();
+
+ ALLOC_GROW(check_vector.checks,
+ check_vector.nr + 1,
+ check_vector.alloc);
+ check_vector.checks[check_vector.nr++] = c;
+
+ vector_unlock();
+}
+
+static void check_vector_remove(struct attr_check *check)
+{
+ int i;
+
+ vector_lock();
+
+ /* Find entry */
+ for (i = 0; i < check_vector.nr; i++)
+ if (check_vector.checks[i] == check)
+ break;
+
+ if (i >= check_vector.nr)
+ die("BUG: no entry found");
+
+ /* shift entries over */
+ for (; i < check_vector.nr - 1; i++)
+ check_vector.checks[i] = check_vector.checks[i + 1];
+
+ check_vector.nr--;
+
+ vector_unlock();
+}
+
+/* Iterate through all attr_check instances and drop their stacks */
+static void drop_all_attr_stacks(void)
+{
+ int i;
+
+ vector_lock();
+
+ for (i = 0; i < check_vector.nr; i++) {
+ drop_attr_stack(&check_vector.checks[i]->stack);
+ }
+
+ vector_unlock();
+}
+
+struct attr_check *attr_check_alloc(void)
+{
+ struct attr_check *c = xcalloc(1, sizeof(struct attr_check));
+
+ /* save pointer to the check struct */
+ check_vector_add(c);
+
+ return c;
+}
+
+struct attr_check *attr_check_initl(const char *one, ...)
+{
+ struct attr_check *check;
+ int cnt;
+ va_list params;
+ const char *param;
+
+ va_start(params, one);
+ for (cnt = 1; (param = va_arg(params, const char *)) != NULL; cnt++)
+ ;
+ va_end(params);
+
+ check = attr_check_alloc();
+ check->nr = cnt;
+ check->alloc = cnt;
+ check->items = xcalloc(cnt, sizeof(struct attr_check_item));
+
+ check->items[0].attr = git_attr(one);
+ va_start(params, one);
+ for (cnt = 1; cnt < check->nr; cnt++) {
+ const struct git_attr *attr;
+ param = va_arg(params, const char *);
+ if (!param)
+ die("BUG: counted %d != ended at %d",
+ check->nr, cnt);
+ attr = git_attr(param);
+ if (!attr)
+ die("BUG: %s: not a valid attribute name", param);
+ check->items[cnt].attr = attr;
+ }
+ va_end(params);
+ return check;
+}
+
+struct attr_check *attr_check_dup(const struct attr_check *check)
+{
+ struct attr_check *ret;
+
+ if (!check)
+ return NULL;
+
+ ret = attr_check_alloc();
+
+ ret->nr = check->nr;
+ ret->alloc = check->alloc;
+ ALLOC_ARRAY(ret->items, ret->nr);
+ COPY_ARRAY(ret->items, check->items, ret->nr);
+
+ return ret;
+}
+
+struct attr_check_item *attr_check_append(struct attr_check *check,
+ const struct git_attr *attr)
+{
+ struct attr_check_item *item;
+
+ ALLOC_GROW(check->items, check->nr + 1, check->alloc);
+ item = &check->items[check->nr++];
+ item->attr = attr;
+ return item;
+}
+
+void attr_check_reset(struct attr_check *check)
+{
+ check->nr = 0;
+}
+
+void attr_check_clear(struct attr_check *check)
+{
+ free(check->items);
+ check->items = NULL;
+ check->alloc = 0;
+ check->nr = 0;
+
+ free(check->all_attrs);
+ check->all_attrs = NULL;
+ check->all_attrs_nr = 0;
+
+ drop_attr_stack(&check->stack);
+}
+
+void attr_check_free(struct attr_check *check)
+{
+ if (check) {
+ /* Remove check from the check vector */
+ check_vector_remove(check);
+
+ attr_check_clear(check);
+ free(check);
+ }
+}
+
static const char *builtin_attr[] = {
"[attr]binary -diff -merge -text",
NULL,
return res;
}
+/*
+ * 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
+ * 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.
+ */
static enum git_attr_direction direction;
static struct index_state *use_index;
+void git_attr_set_direction(enum git_attr_direction new_direction,
+ struct index_state *istate)
+{
+ if (is_bare_repository() && new_direction != GIT_ATTR_INDEX)
+ die("BUG: non-INDEX attr direction in a bare repo");
+
+ if (new_direction != direction)
+ drop_all_attr_stacks();
+
+ direction = new_direction;
+ use_index = istate;
+}
+
static struct attr_stack *read_attr_from_file(const char *path, int macro_ok)
{
FILE *fp = fopen(path, "r");
for (sp = buf; *sp; ) {
char *ep;
int more;
- for (ep = sp; *ep && *ep != '\n'; ep++)
- ;
+
+ ep = strchrnul(sp, '\n');
more = (*ep == '\n');
*ep = '\0';
handle_attr_line(res, sp, path, ++lineno, macro_ok);
static struct attr_stack *read_attr(const char *path, int macro_ok)
{
- struct attr_stack *res;
+ struct attr_stack *res = NULL;
- if (direction == GIT_ATTR_CHECKOUT) {
+ if (direction == GIT_ATTR_INDEX) {
res = read_attr_from_index(path, macro_ok);
- if (!res)
- res = read_attr_from_file(path, macro_ok);
- }
- else if (direction == GIT_ATTR_CHECKIN) {
- res = read_attr_from_file(path, macro_ok);
- if (!res)
- /*
- * There is no checked out .gitattributes file there, but
- * we might have it in the index. We allow operation in a
- * sparsely checked out work tree, so read from it.
- */
+ } else if (!is_bare_repository()) {
+ if (direction == GIT_ATTR_CHECKOUT) {
res = read_attr_from_index(path, macro_ok);
+ if (!res)
+ res = read_attr_from_file(path, macro_ok);
+ } else if (direction == GIT_ATTR_CHECKIN) {
+ res = read_attr_from_file(path, macro_ok);
+ if (!res)
+ /*
+ * There is no checked out .gitattributes file
+ * there, but we might have it in the index.
+ * We allow operation in a sparsely checked out
+ * work tree, so read from it.
+ */
+ res = read_attr_from_index(path, macro_ok);
+ }
}
- else
- res = read_attr_from_index(path, macro_ok);
+
if (!res)
res = xcalloc(1, sizeof(*res));
return res;
#define debug_push(a) do { ; } while (0)
#define debug_pop(a) do { ; } while (0)
#define debug_set(a,b,c,d) do { ; } while (0)
-#endif
-
-static void drop_attr_stack(void)
-{
- while (attr_stack) {
- struct attr_stack *elem = attr_stack;
- attr_stack = elem->prev;
- free_attr_elem(elem);
- }
-}
+#endif /* DEBUG_ATTR */
static const char *git_etc_gitattributes(void)
{
return system_wide;
}
+static const char *get_home_gitattributes(void)
+{
+ if (!git_attributes_file)
+ git_attributes_file = xdg_config_home("attributes");
+
+ return git_attributes_file;
+}
+
static int git_attr_system(void)
{
return !git_env_bool("GIT_ATTR_NOSYSTEM", 0);
static GIT_PATH_FUNC(git_path_info_attributes, INFOATTRIBUTES_FILE)
-static void bootstrap_attr_stack(void)
+static void push_stack(struct attr_stack **attr_stack_p,
+ struct attr_stack *elem, char *origin, size_t originlen)
{
- struct attr_stack *elem;
+ if (elem) {
+ elem->origin = origin;
+ if (origin)
+ elem->originlen = originlen;
+ elem->prev = *attr_stack_p;
+ *attr_stack_p = elem;
+ }
+}
- if (attr_stack)
+static void bootstrap_attr_stack(struct attr_stack **stack)
+{
+ struct attr_stack *e;
+
+ if (*stack)
return;
- elem = read_attr_from_array(builtin_attr);
- elem->origin = NULL;
- elem->prev = attr_stack;
- attr_stack = elem;
+ /* builtin frame */
+ e = read_attr_from_array(builtin_attr);
+ push_stack(stack, e, NULL, 0);
+ /* system-wide frame */
if (git_attr_system()) {
- elem = read_attr_from_file(git_etc_gitattributes(), 1);
- if (elem) {
- elem->origin = NULL;
- elem->prev = attr_stack;
- attr_stack = elem;
- }
+ e = read_attr_from_file(git_etc_gitattributes(), 1);
+ push_stack(stack, e, NULL, 0);
}
- if (!git_attributes_file)
- git_attributes_file = xdg_config_home("attributes");
- if (git_attributes_file) {
- elem = read_attr_from_file(git_attributes_file, 1);
- if (elem) {
- elem->origin = NULL;
- elem->prev = attr_stack;
- attr_stack = elem;
- }
+ /* home directory */
+ if (get_home_gitattributes()) {
+ e = read_attr_from_file(get_home_gitattributes(), 1);
+ push_stack(stack, e, NULL, 0);
}
- if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
- elem = read_attr(GITATTRIBUTES_FILE, 1);
- elem->origin = xstrdup("");
- elem->originlen = 0;
- elem->prev = attr_stack;
- attr_stack = elem;
- debug_push(elem);
- }
+ /* root directory */
+ e = read_attr(GITATTRIBUTES_FILE, 1);
+ push_stack(stack, e, xstrdup(""), 0);
- elem = read_attr_from_file(git_path_info_attributes(), 1);
- if (!elem)
- elem = xcalloc(1, sizeof(*elem));
- elem->origin = NULL;
- elem->prev = attr_stack;
- attr_stack = elem;
+ /* info frame */
+ if (startup_info->have_repository)
+ e = read_attr_from_file(git_path_info_attributes(), 1);
+ else
+ e = NULL;
+ if (!e)
+ e = xcalloc(1, sizeof(struct attr_stack));
+ push_stack(stack, e, NULL, 0);
}
-static void prepare_attr_stack(const char *path, int dirlen)
+static void prepare_attr_stack(const char *path, int dirlen,
+ struct attr_stack **stack)
{
- struct attr_stack *elem, *info;
- int len;
- const char *cp;
+ struct attr_stack *info;
+ struct strbuf pathbuf = STRBUF_INIT;
/*
* At the bottom of the attribute stack is the built-in
* .gitattributes in deeper directories to shallower ones,
* and finally use the built-in set as the default.
*/
- bootstrap_attr_stack();
+ bootstrap_attr_stack(stack);
/*
* Pop the "info" one that is always at the top of the stack.
*/
- info = attr_stack;
- attr_stack = info->prev;
+ info = *stack;
+ *stack = info->prev;
/*
* Pop the ones from directories that are not the prefix of
* the root one (whose origin is an empty string "") or the builtin
* one (whose origin is NULL) without popping it.
*/
- while (attr_stack->origin) {
- int namelen = strlen(attr_stack->origin);
+ while ((*stack)->origin) {
+ int namelen = (*stack)->originlen;
+ struct attr_stack *elem;
- elem = attr_stack;
+ elem = *stack;
if (namelen <= dirlen &&
!strncmp(elem->origin, path, namelen) &&
(!namelen || path[namelen] == '/'))
break;
debug_pop(elem);
- attr_stack = elem->prev;
- free_attr_elem(elem);
+ *stack = elem->prev;
+ attr_stack_free(elem);
}
/*
- * Read from parent directories and push them down
+ * bootstrap_attr_stack() should have added, and the
+ * above loop should have stopped before popping, the
+ * root element whose attr_stack->origin is set to an
+ * empty string.
*/
- if (!is_bare_repository() || direction == GIT_ATTR_INDEX) {
- /*
- * bootstrap_attr_stack() should have added, and the
- * above loop should have stopped before popping, the
- * root element whose attr_stack->origin is set to an
- * empty string.
- */
- struct strbuf pathbuf = STRBUF_INIT;
-
- assert(attr_stack->origin);
- while (1) {
- len = strlen(attr_stack->origin);
- if (dirlen <= len)
- break;
- cp = memchr(path + len + 1, '/', dirlen - len - 1);
- if (!cp)
- cp = path + dirlen;
- strbuf_add(&pathbuf, path, cp - path);
+ assert((*stack)->origin);
+
+ strbuf_addstr(&pathbuf, (*stack)->origin);
+ /* Build up to the directory 'path' is in */
+ while (pathbuf.len < dirlen) {
+ size_t len = pathbuf.len;
+ struct attr_stack *next;
+ char *origin;
+
+ /* Skip path-separator */
+ if (len < dirlen && is_dir_sep(path[len]))
+ len++;
+ /* Find the end of the next component */
+ while (len < dirlen && !is_dir_sep(path[len]))
+ len++;
+
+ if (pathbuf.len > 0)
strbuf_addch(&pathbuf, '/');
- strbuf_addstr(&pathbuf, GITATTRIBUTES_FILE);
- elem = read_attr(pathbuf.buf, 0);
- strbuf_setlen(&pathbuf, cp - path);
- elem->origin = strbuf_detach(&pathbuf, &elem->originlen);
- elem->prev = attr_stack;
- attr_stack = elem;
- debug_push(elem);
- }
+ strbuf_add(&pathbuf, path + pathbuf.len, (len - pathbuf.len));
+ strbuf_addf(&pathbuf, "/%s", GITATTRIBUTES_FILE);
+
+ next = read_attr(pathbuf.buf, 0);
+
+ /* reset the pathbuf to not include "/.gitattributes" */
+ strbuf_setlen(&pathbuf, len);
- strbuf_release(&pathbuf);
+ origin = xstrdup(pathbuf.buf);
+ push_stack(stack, next, origin, len);
}
/*
* Finally push the "info" one at the top of the stack.
*/
- info->prev = attr_stack;
- attr_stack = info;
+ push_stack(stack, info, NULL, 0);
+
+ strbuf_release(&pathbuf);
}
static int path_matches(const char *pathname, int pathlen,
pattern, prefix, pat->patternlen, pat->flags);
}
-static int macroexpand_one(int attr_nr, int rem);
+static int macroexpand_one(struct all_attrs_item *all_attrs, int nr, int rem);
-static int fill_one(const char *what, struct match_attr *a, int rem)
+static int fill_one(const char *what, struct all_attrs_item *all_attrs,
+ const struct match_attr *a, int rem)
{
- struct git_attr_check *check = check_all_attr;
int i;
- for (i = a->num_attr - 1; 0 < rem && 0 <= i; i--) {
- struct git_attr *attr = a->state[i].attr;
- const char **n = &(check[attr->attr_nr].value);
+ for (i = a->num_attr - 1; rem > 0 && i >= 0; i--) {
+ const struct git_attr *attr = a->state[i].attr;
+ const char **n = &(all_attrs[attr->attr_nr].value);
const char *v = a->state[i].setto;
if (*n == ATTR__UNKNOWN) {
attr, v);
*n = v;
rem--;
- rem = macroexpand_one(attr->attr_nr, rem);
+ rem = macroexpand_one(all_attrs, attr->attr_nr, rem);
}
}
return rem;
}
static int fill(const char *path, int pathlen, int basename_offset,
- struct attr_stack *stk, int rem)
+ const struct attr_stack *stack,
+ struct all_attrs_item *all_attrs, int rem)
{
- int i;
- const char *base = stk->origin ? stk->origin : "";
+ for (; rem > 0 && stack; stack = stack->prev) {
+ int i;
+ const char *base = stack->origin ? stack->origin : "";
- for (i = stk->num_matches - 1; 0 < rem && 0 <= i; i--) {
- struct match_attr *a = stk->attrs[i];
- if (a->is_macro)
- continue;
- if (path_matches(path, pathlen, basename_offset,
- &a->u.pat, base, stk->originlen))
- rem = fill_one("fill", a, rem);
+ for (i = stack->num_matches - 1; 0 < rem && 0 <= i; i--) {
+ const struct match_attr *a = stack->attrs[i];
+ if (a->is_macro)
+ continue;
+ if (path_matches(path, pathlen, basename_offset,
+ &a->u.pat, base, stack->originlen))
+ rem = fill_one("fill", all_attrs, a, rem);
+ }
}
+
return rem;
}
-static int macroexpand_one(int nr, int rem)
+static int macroexpand_one(struct all_attrs_item *all_attrs, int nr, int rem)
{
- struct attr_stack *stk;
- struct match_attr *a = NULL;
- int i;
+ const struct all_attrs_item *item = &all_attrs[nr];
- if (check_all_attr[nr].value != ATTR__TRUE ||
- !check_all_attr[nr].attr->maybe_macro)
+ if (item->macro && item->value == ATTR__TRUE)
+ return fill_one("expand", all_attrs, item->macro, rem);
+ else
return rem;
+}
- for (stk = attr_stack; !a && stk; stk = stk->prev)
- for (i = stk->num_matches - 1; !a && 0 <= i; i--) {
- struct match_attr *ma = stk->attrs[i];
- if (!ma->is_macro)
- continue;
- if (ma->u.attr->attr_nr == nr)
- a = ma;
+/*
+ * Marks the attributes which are macros based on the attribute stack.
+ * This prevents having to search through the attribute stack each time
+ * a macro needs to be expanded during the fill stage.
+ */
+static void determine_macros(struct all_attrs_item *all_attrs,
+ const struct attr_stack *stack)
+{
+ for (; stack; stack = stack->prev) {
+ int i;
+ for (i = stack->num_matches - 1; i >= 0; i--) {
+ const struct match_attr *ma = stack->attrs[i];
+ if (ma->is_macro) {
+ int n = ma->u.attr->attr_nr;
+ if (!all_attrs[n].macro) {
+ all_attrs[n].macro = ma;
+ }
+ }
}
-
- if (a)
- rem = fill_one("expand", a, rem);
-
- return rem;
+ }
}
/*
- * Collect attributes for path into the array pointed to by
- * check_all_attr. If num is non-zero, only attributes in check[] are
- * collected. Otherwise all attributes are collected.
+ * Collect attributes for path into the array pointed to by check->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 char *path, int num,
- struct git_attr_check *check)
-
+static void collect_some_attrs(const char *path, struct attr_check *check)
{
- struct attr_stack *stk;
int i, pathlen, rem, dirlen;
const char *cp, *last_slash = NULL;
int basename_offset;
dirlen = 0;
}
- prepare_attr_stack(path, dirlen);
- for (i = 0; i < attr_nr; i++)
- check_all_attr[i].value = ATTR__UNKNOWN;
- if (num && !cannot_trust_maybe_real) {
+ prepare_attr_stack(path, dirlen, &check->stack);
+ all_attrs_init(&g_attr_hashmap, check);
+ determine_macros(check->all_attrs, check->stack);
+
+ if (check->nr) {
rem = 0;
- for (i = 0; i < num; i++) {
- if (!check[i].attr->maybe_real) {
- struct git_attr_check *c;
- c = check_all_attr + check[i].attr->attr_nr;
- c->value = ATTR__UNSET;
+ for (i = 0; i < check->nr; i++) {
+ int n = check->items[i].attr->attr_nr;
+ struct all_attrs_item *item = &check->all_attrs[n];
+ if (item->macro) {
+ item->value = ATTR__UNSET;
rem++;
}
}
- if (rem == num)
+ if (rem == check->nr)
return;
}
- rem = attr_nr;
- for (stk = attr_stack; 0 < rem && stk; stk = stk->prev)
- rem = fill(path, pathlen, basename_offset, stk, rem);
+ rem = check->all_attrs_nr;
+ fill(path, pathlen, basename_offset, check->stack, check->all_attrs, rem);
}
-int git_check_attr(const char *path, int num, struct git_attr_check *check)
+int git_check_attr(const char *path, struct attr_check *check)
{
int i;
- collect_some_attrs(path, num, check);
+ collect_some_attrs(path, check);
- for (i = 0; i < num; i++) {
- const char *value = check_all_attr[check[i].attr->attr_nr].value;
+ for (i = 0; i < check->nr; i++) {
+ size_t n = check->items[i].attr->attr_nr;
+ const char *value = check->all_attrs[n].value;
if (value == ATTR__UNKNOWN)
value = ATTR__UNSET;
- check[i].value = value;
+ check->items[i].value = value;
}
return 0;
}
-int git_all_attrs(const char *path, int *num, struct git_attr_check **check)
+void git_all_attrs(const char *path, struct attr_check *check)
{
- int i, count, j;
+ int i;
- collect_some_attrs(path, 0, NULL);
+ attr_check_reset(check);
+ collect_some_attrs(path, check);
- /* Count the number of attributes that are set. */
- count = 0;
- for (i = 0; i < attr_nr; i++) {
- const char *value = check_all_attr[i].value;
- if (value != ATTR__UNSET && value != ATTR__UNKNOWN)
- ++count;
- }
- *num = count;
- ALLOC_ARRAY(*check, count);
- j = 0;
- for (i = 0; i < attr_nr; i++) {
- const char *value = check_all_attr[i].value;
- if (value != ATTR__UNSET && value != ATTR__UNKNOWN) {
- (*check)[j].attr = check_all_attr[i].attr;
- (*check)[j].value = value;
- ++j;
- }
+ for (i = 0; i < check->all_attrs_nr; i++) {
+ const char *name = check->all_attrs[i].attr->name;
+ const char *value = check->all_attrs[i].value;
+ struct attr_check_item *item;
+ if (value == ATTR__UNSET || value == ATTR__UNKNOWN)
+ continue;
+ item = attr_check_append(check, git_attr(name));
+ item->value = value;
}
-
- return 0;
}
-void git_attr_set_direction(enum git_attr_direction new, struct index_state *istate)
+void attr_start(void)
{
- enum git_attr_direction old = direction;
-
- if (is_bare_repository() && new != GIT_ATTR_INDEX)
- die("BUG: non-INDEX attr direction in a bare repo");
-
- direction = new;
- if (new != old)
- drop_attr_stack();
- use_index = istate;
+#ifndef NO_PTHREADS
+ pthread_mutex_init(&g_attr_hashmap.mutex, NULL);
+ pthread_mutex_init(&check_vector.mutex, NULL);
+#endif
}