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git/dir.c
Junio C Hamano ab85a7de6d Merge branch 'ws/single-file-cone' 
The logic to see if we are using the "cone" mode by checking the
sparsity patterns has been tightened to avoid mistaking a pattern
that names a single file as specifying a cone.

* ws/single-file-cone:
  dir: check for single file cone patterns
2023-01-16 12:07:47 -08:00

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C
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/*
* This handles recursive filename detection with exclude
* files, index knowledge etc..
*
* Copyright (C) Linus Torvalds, 2005-2006
* Junio Hamano, 2005-2006
*/
#include "cache.h"
#include "config.h"
#include "dir.h"
#include "object-store.h"
#include "attr.h"
#include "refs.h"
#include "wildmatch.h"
#include "pathspec.h"
#include "utf8.h"
#include "varint.h"
#include "ewah/ewok.h"
#include "fsmonitor.h"
#include "submodule-config.h"
/*
* Tells read_directory_recursive how a file or directory should be treated.
* Values are ordered by significance, e.g. if a directory contains both
* excluded and untracked files, it is listed as untracked because
* path_untracked > path_excluded.
*/
enum path_treatment {
path_none = 0,
path_recurse,
path_excluded,
path_untracked
};
/*
* Support data structure for our opendir/readdir/closedir wrappers
*/
struct cached_dir {
DIR *fdir;
struct untracked_cache_dir *untracked;
int nr_files;
int nr_dirs;
const char *d_name;
int d_type;
const char *file;
struct untracked_cache_dir *ucd;
};
static enum path_treatment read_directory_recursive(struct dir_struct *dir,
struct index_state *istate, const char *path, int len,
struct untracked_cache_dir *untracked,
int check_only, int stop_at_first_file, const struct pathspec *pathspec);
static int resolve_dtype(int dtype, struct index_state *istate,
const char *path, int len);
struct dirent *readdir_skip_dot_and_dotdot(DIR *dirp)
{
struct dirent *e;
while ((e = readdir(dirp)) != NULL) {
if (!is_dot_or_dotdot(e->d_name))
break;
}
return e;
}
int count_slashes(const char *s)
{
int cnt = 0;
while (*s)
if (*s++ == '/')
cnt++;
return cnt;
}
int fspathcmp(const char *a, const char *b)
{
return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
}
int fspatheq(const char *a, const char *b)
{
return !fspathcmp(a, b);
}
int fspathncmp(const char *a, const char *b, size_t count)
{
return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
}
unsigned int fspathhash(const char *str)
{
return ignore_case ? strihash(str) : strhash(str);
}
int git_fnmatch(const struct pathspec_item *item,
const char *pattern, const char *string,
int prefix)
{
if (prefix > 0) {
if (ps_strncmp(item, pattern, string, prefix))
return WM_NOMATCH;
pattern += prefix;
string += prefix;
}
if (item->flags & PATHSPEC_ONESTAR) {
int pattern_len = strlen(++pattern);
int string_len = strlen(string);
return string_len < pattern_len ||
ps_strcmp(item, pattern,
string + string_len - pattern_len);
}
if (item->magic & PATHSPEC_GLOB)
return wildmatch(pattern, string,
WM_PATHNAME |
(item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0));
else
/* wildmatch has not learned no FNM_PATHNAME mode yet */
return wildmatch(pattern, string,
item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0);
}
static int fnmatch_icase_mem(const char *pattern, int patternlen,
const char *string, int stringlen,
int flags)
{
int match_status;
struct strbuf pat_buf = STRBUF_INIT;
struct strbuf str_buf = STRBUF_INIT;
const char *use_pat = pattern;
const char *use_str = string;
if (pattern[patternlen]) {
strbuf_add(&pat_buf, pattern, patternlen);
use_pat = pat_buf.buf;
}
if (string[stringlen]) {
strbuf_add(&str_buf, string, stringlen);
use_str = str_buf.buf;
}
if (ignore_case)
flags |= WM_CASEFOLD;
match_status = wildmatch(use_pat, use_str, flags);
strbuf_release(&pat_buf);
strbuf_release(&str_buf);
return match_status;
}
static size_t common_prefix_len(const struct pathspec *pathspec)
{
int n;
size_t max = 0;
/*
* ":(icase)path" is treated as a pathspec full of
* wildcard. In other words, only prefix is considered common
* prefix. If the pathspec is abc/foo abc/bar, running in
* subdir xyz, the common prefix is still xyz, not xyz/abc as
* in non-:(icase).
*/
GUARD_PATHSPEC(pathspec,
PATHSPEC_FROMTOP |
PATHSPEC_MAXDEPTH |
PATHSPEC_LITERAL |
PATHSPEC_GLOB |
PATHSPEC_ICASE |
PATHSPEC_EXCLUDE |
PATHSPEC_ATTR);
for (n = 0; n < pathspec->nr; n++) {
size_t i = 0, len = 0, item_len;
if (pathspec->items[n].magic & PATHSPEC_EXCLUDE)
continue;
if (pathspec->items[n].magic & PATHSPEC_ICASE)
item_len = pathspec->items[n].prefix;
else
item_len = pathspec->items[n].nowildcard_len;
while (i < item_len && (n == 0 || i < max)) {
char c = pathspec->items[n].match[i];
if (c != pathspec->items[0].match[i])
break;
if (c == '/')
len = i + 1;
i++;
}
if (n == 0 || len < max) {
max = len;
if (!max)
break;
}
}
return max;
}
/*
* Returns a copy of the longest leading path common among all
* pathspecs.
*/
char *common_prefix(const struct pathspec *pathspec)
{
unsigned long len = common_prefix_len(pathspec);
return len ? xmemdupz(pathspec->items[0].match, len) : NULL;
}
int fill_directory(struct dir_struct *dir,
struct index_state *istate,
const struct pathspec *pathspec)
{
const char *prefix;
size_t prefix_len;
unsigned exclusive_flags = DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO;
if ((dir->flags & exclusive_flags) == exclusive_flags)
BUG("DIR_SHOW_IGNORED and DIR_SHOW_IGNORED_TOO are exclusive");
/*
* Calculate common prefix for the pathspec, and
* use that to optimize the directory walk
*/
prefix_len = common_prefix_len(pathspec);
prefix = prefix_len ? pathspec->items[0].match : "";
/* Read the directory and prune it */
read_directory(dir, istate, prefix, prefix_len, pathspec);
return prefix_len;
}
int within_depth(const char *name, int namelen,
int depth, int max_depth)
{
const char *cp = name, *cpe = name + namelen;
while (cp < cpe) {
if (*cp++ != '/')
continue;
depth++;
if (depth > max_depth)
return 0;
}
return 1;
}
/*
* Read the contents of the blob with the given OID into a buffer.
* Append a trailing LF to the end if the last line doesn't have one.
*
* Returns:
* -1 when the OID is invalid or unknown or does not refer to a blob.
* 0 when the blob is empty.
* 1 along with { data, size } of the (possibly augmented) buffer
* when successful.
*
* Optionally updates the given oid_stat with the given OID (when valid).
*/
static int do_read_blob(const struct object_id *oid, struct oid_stat *oid_stat,
size_t *size_out, char **data_out)
{
enum object_type type;
unsigned long sz;
char *data;
*size_out = 0;
*data_out = NULL;
data = read_object_file(oid, &type, &sz);
if (!data || type != OBJ_BLOB) {
free(data);
return -1;
}
if (oid_stat) {
memset(&oid_stat->stat, 0, sizeof(oid_stat->stat));
oidcpy(&oid_stat->oid, oid);
}
if (sz == 0) {
free(data);
return 0;
}
if (data[sz - 1] != '\n') {
data = xrealloc(data, st_add(sz, 1));
data[sz++] = '\n';
}
*size_out = xsize_t(sz);
*data_out = data;
return 1;
}
#define DO_MATCH_EXCLUDE (1<<0)
#define DO_MATCH_DIRECTORY (1<<1)
#define DO_MATCH_LEADING_PATHSPEC (1<<2)
/*
* Does the given pathspec match the given name? A match is found if
*
* (1) the pathspec string is leading directory of 'name' ("RECURSIVELY"), or
* (2) the pathspec string has a leading part matching 'name' ("LEADING"), or
* (3) the pathspec string is a wildcard and matches 'name' ("WILDCARD"), or
* (4) the pathspec string is exactly the same as 'name' ("EXACT").
*
* Return value tells which case it was (1-4), or 0 when there is no match.
*
* It may be instructive to look at a small table of concrete examples
* to understand the differences between 1, 2, and 4:
*
* Pathspecs
* | a/b | a/b/ | a/b/c
* ------+-----------+-----------+------------
* a/b | EXACT | EXACT[1] | LEADING[2]
* Names a/b/ | RECURSIVE | EXACT | LEADING[2]
* a/b/c | RECURSIVE | RECURSIVE | EXACT
*
* [1] Only if DO_MATCH_DIRECTORY is passed; otherwise, this is NOT a match.
* [2] Only if DO_MATCH_LEADING_PATHSPEC is passed; otherwise, not a match.
*/
static int match_pathspec_item(struct index_state *istate,
const struct pathspec_item *item, int prefix,
const char *name, int namelen, unsigned flags)
{
/* name/namelen has prefix cut off by caller */
const char *match = item->match + prefix;
int matchlen = item->len - prefix;
/*
* The normal call pattern is:
* 1. prefix = common_prefix_len(ps);
* 2. prune something, or fill_directory
* 3. match_pathspec()
*
* 'prefix' at #1 may be shorter than the command's prefix and
* it's ok for #2 to match extra files. Those extras will be
* trimmed at #3.
*
* Suppose the pathspec is 'foo' and '../bar' running from
* subdir 'xyz'. The common prefix at #1 will be empty, thanks
* to "../". We may have xyz/foo _and_ XYZ/foo after #2. The
* user does not want XYZ/foo, only the "foo" part should be
* case-insensitive. We need to filter out XYZ/foo here. In
* other words, we do not trust the caller on comparing the
* prefix part when :(icase) is involved. We do exact
* comparison ourselves.
*
* Normally the caller (common_prefix_len() in fact) does
* _exact_ matching on name[-prefix+1..-1] and we do not need
* to check that part. Be defensive and check it anyway, in
* case common_prefix_len is changed, or a new caller is
* introduced that does not use common_prefix_len.
*
* If the penalty turns out too high when prefix is really
* long, maybe change it to
* strncmp(match, name, item->prefix - prefix)
*/
if (item->prefix && (item->magic & PATHSPEC_ICASE) &&
strncmp(item->match, name - prefix, item->prefix))
return 0;
if (item->attr_match_nr &&
!match_pathspec_attrs(istate, name, namelen, item))
return 0;
/* If the match was just the prefix, we matched */
if (!*match)
return MATCHED_RECURSIVELY;
if (matchlen <= namelen && !ps_strncmp(item, match, name, matchlen)) {
if (matchlen == namelen)
return MATCHED_EXACTLY;
if (match[matchlen-1] == '/' || name[matchlen] == '/')
return MATCHED_RECURSIVELY;
} else if ((flags & DO_MATCH_DIRECTORY) &&
match[matchlen - 1] == '/' &&
namelen == matchlen - 1 &&
!ps_strncmp(item, match, name, namelen))
return MATCHED_EXACTLY;
if (item->nowildcard_len < item->len &&
!git_fnmatch(item, match, name,
item->nowildcard_len - prefix))
return MATCHED_FNMATCH;
/* Perform checks to see if "name" is a leading string of the pathspec */
if ( (flags & DO_MATCH_LEADING_PATHSPEC) &&
!(flags & DO_MATCH_EXCLUDE)) {
/* name is a literal prefix of the pathspec */
int offset = name[namelen-1] == '/' ? 1 : 0;
if ((namelen < matchlen) &&
(match[namelen-offset] == '/') &&
!ps_strncmp(item, match, name, namelen))
return MATCHED_RECURSIVELY_LEADING_PATHSPEC;
/* name doesn't match up to the first wild character */
if (item->nowildcard_len < item->len &&
ps_strncmp(item, match, name,
item->nowildcard_len - prefix))
return 0;
/*
* name has no wildcard, and it didn't match as a leading
* pathspec so return.
*/
if (item->nowildcard_len == item->len)
return 0;
/*
* Here is where we would perform a wildmatch to check if
* "name" can be matched as a directory (or a prefix) against
* the pathspec. Since wildmatch doesn't have this capability
* at the present we have to punt and say that it is a match,
* potentially returning a false positive
* The submodules themselves will be able to perform more
* accurate matching to determine if the pathspec matches.
*/
return MATCHED_RECURSIVELY_LEADING_PATHSPEC;
}
return 0;
}
/*
* do_match_pathspec() is meant to ONLY be called by
* match_pathspec_with_flags(); calling it directly risks pathspecs
* like ':!unwanted_path' being ignored.
*
* Given a name and a list of pathspecs, returns the nature of the
* closest (i.e. most specific) match of the name to any of the
* pathspecs.
*
* The caller typically calls this multiple times with the same
* pathspec and seen[] array but with different name/namelen
* (e.g. entries from the index) and is interested in seeing if and
* how each pathspec matches all the names it calls this function
* with. A mark is left in the seen[] array for each pathspec element
* indicating the closest type of match that element achieved, so if
* seen[n] remains zero after multiple invocations, that means the nth
* pathspec did not match any names, which could indicate that the
* user mistyped the nth pathspec.
*/
static int do_match_pathspec(struct index_state *istate,
const struct pathspec *ps,
const char *name, int namelen,
int prefix, char *seen,
unsigned flags)
{
int i, retval = 0, exclude = flags & DO_MATCH_EXCLUDE;
GUARD_PATHSPEC(ps,
PATHSPEC_FROMTOP |
PATHSPEC_MAXDEPTH |
PATHSPEC_LITERAL |
PATHSPEC_GLOB |
PATHSPEC_ICASE |
PATHSPEC_EXCLUDE |
PATHSPEC_ATTR);
if (!ps->nr) {
if (!ps->recursive ||
!(ps->magic & PATHSPEC_MAXDEPTH) ||
ps->max_depth == -1)
return MATCHED_RECURSIVELY;
if (within_depth(name, namelen, 0, ps->max_depth))
return MATCHED_EXACTLY;
else
return 0;
}
name += prefix;
namelen -= prefix;
for (i = ps->nr - 1; i >= 0; i--) {
int how;
if ((!exclude && ps->items[i].magic & PATHSPEC_EXCLUDE) ||
( exclude && !(ps->items[i].magic & PATHSPEC_EXCLUDE)))
continue;
if (seen && seen[i] == MATCHED_EXACTLY)
continue;
/*
* Make exclude patterns optional and never report
* "pathspec ':(exclude)foo' matches no files"
*/
if (seen && ps->items[i].magic & PATHSPEC_EXCLUDE)
seen[i] = MATCHED_FNMATCH;
how = match_pathspec_item(istate, ps->items+i, prefix, name,
namelen, flags);
if (ps->recursive &&
(ps->magic & PATHSPEC_MAXDEPTH) &&
ps->max_depth != -1 &&
how && how != MATCHED_FNMATCH) {
int len = ps->items[i].len;
if (name[len] == '/')
len++;
if (within_depth(name+len, namelen-len, 0, ps->max_depth))
how = MATCHED_EXACTLY;
else
how = 0;
}
if (how) {
if (retval < how)
retval = how;
if (seen && seen[i] < how)
seen[i] = how;
}
}
return retval;
}
static int match_pathspec_with_flags(struct index_state *istate,
const struct pathspec *ps,
const char *name, int namelen,
int prefix, char *seen, unsigned flags)
{
int positive, negative;
positive = do_match_pathspec(istate, ps, name, namelen,
prefix, seen, flags);
if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
return positive;
negative = do_match_pathspec(istate, ps, name, namelen,
prefix, seen,
flags | DO_MATCH_EXCLUDE);
return negative ? 0 : positive;
}
int match_pathspec(struct index_state *istate,
const struct pathspec *ps,
const char *name, int namelen,
int prefix, char *seen, int is_dir)
{
unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
return match_pathspec_with_flags(istate, ps, name, namelen,
prefix, seen, flags);
}
/**
* Check if a submodule is a superset of the pathspec
*/
int submodule_path_match(struct index_state *istate,
const struct pathspec *ps,
const char *submodule_name,
char *seen)
{
int matched = match_pathspec_with_flags(istate, ps, submodule_name,
strlen(submodule_name),
0, seen,
DO_MATCH_DIRECTORY |
DO_MATCH_LEADING_PATHSPEC);
return matched;
}
int report_path_error(const char *ps_matched,
const struct pathspec *pathspec)
{
/*
* Make sure all pathspec matched; otherwise it is an error.
*/
int num, errors = 0;
for (num = 0; num < pathspec->nr; num++) {
int other, found_dup;
if (ps_matched[num])
continue;
/*
* The caller might have fed identical pathspec
* twice. Do not barf on such a mistake.
* FIXME: parse_pathspec should have eliminated
* duplicate pathspec.
*/
for (found_dup = other = 0;
!found_dup && other < pathspec->nr;
other++) {
if (other == num || !ps_matched[other])
continue;
if (!strcmp(pathspec->items[other].original,
pathspec->items[num].original))
/*
* Ok, we have a match already.
*/
found_dup = 1;
}
if (found_dup)
continue;
error(_("pathspec '%s' did not match any file(s) known to git"),
pathspec->items[num].original);
errors++;
}
return errors;
}
/*
* Return the length of the "simple" part of a path match limiter.
*/
int simple_length(const char *match)
{
int len = -1;
for (;;) {
unsigned char c = *match++;
len++;
if (c == '\0' || is_glob_special(c))
return len;
}
}
int no_wildcard(const char *string)
{
return string[simple_length(string)] == '\0';
}
void parse_path_pattern(const char **pattern,
int *patternlen,
unsigned *flags,
int *nowildcardlen)
{
const char *p = *pattern;
size_t i, len;
*flags = 0;
if (*p == '!') {
*flags |= PATTERN_FLAG_NEGATIVE;
p++;
}
len = strlen(p);
if (len && p[len - 1] == '/') {
len--;
*flags |= PATTERN_FLAG_MUSTBEDIR;
}
for (i = 0; i < len; i++) {
if (p[i] == '/')
break;
}
if (i == len)
*flags |= PATTERN_FLAG_NODIR;
*nowildcardlen = simple_length(p);
/*
* we should have excluded the trailing slash from 'p' too,
* but that's one more allocation. Instead just make sure
* nowildcardlen does not exceed real patternlen
*/
if (*nowildcardlen > len)
*nowildcardlen = len;
if (*p == '*' && no_wildcard(p + 1))
*flags |= PATTERN_FLAG_ENDSWITH;
*pattern = p;
*patternlen = len;
}
int pl_hashmap_cmp(const void *cmp_data UNUSED,
const struct hashmap_entry *a,
const struct hashmap_entry *b,
const void *key UNUSED)
{
const struct pattern_entry *ee1 =
container_of(a, struct pattern_entry, ent);
const struct pattern_entry *ee2 =
container_of(b, struct pattern_entry, ent);
size_t min_len = ee1->patternlen <= ee2->patternlen
? ee1->patternlen
: ee2->patternlen;
return fspathncmp(ee1->pattern, ee2->pattern, min_len);
}
static char *dup_and_filter_pattern(const char *pattern)
{
char *set, *read;
size_t count = 0;
char *result = xstrdup(pattern);
set = result;
read = result;
while (*read) {
/* skip escape characters (once) */
if (*read == '\\')
read++;
*set = *read;
set++;
read++;
count++;
}
*set = 0;
if (count > 2 &&
*(set - 1) == '*' &&
*(set - 2) == '/')
*(set - 2) = 0;
return result;
}
static void add_pattern_to_hashsets(struct pattern_list *pl, struct path_pattern *given)
{
struct pattern_entry *translated;
char *truncated;
char *data = NULL;
const char *prev, *cur, *next;
if (!pl->use_cone_patterns)
return;
if (given->flags & PATTERN_FLAG_NEGATIVE &&
given->flags & PATTERN_FLAG_MUSTBEDIR &&
!strcmp(given->pattern, "/*")) {
pl->full_cone = 0;
return;
}
if (!given->flags && !strcmp(given->pattern, "/*")) {
pl->full_cone = 1;
return;
}
if (given->patternlen < 2 ||
*given->pattern != '/' ||
strstr(given->pattern, "**")) {
/* Not a cone pattern. */
warning(_("unrecognized pattern: '%s'"), given->pattern);
goto clear_hashmaps;
}
if (!(given->flags & PATTERN_FLAG_MUSTBEDIR) &&
strcmp(given->pattern, "/*")) {
/* Not a cone pattern. */
warning(_("unrecognized pattern: '%s'"), given->pattern);
goto clear_hashmaps;
}
prev = given->pattern;
cur = given->pattern + 1;
next = given->pattern + 2;
while (*cur) {
/* Watch for glob characters '*', '\', '[', '?' */
if (!is_glob_special(*cur))
goto increment;
/* But only if *prev != '\\' */
if (*prev == '\\')
goto increment;
/* But allow the initial '\' */
if (*cur == '\\' &&
is_glob_special(*next))
goto increment;
/* But a trailing '/' then '*' is fine */
if (*prev == '/' &&
*cur == '*' &&
*next == 0)
goto increment;
/* Not a cone pattern. */
warning(_("unrecognized pattern: '%s'"), given->pattern);
goto clear_hashmaps;
increment:
prev++;
cur++;
next++;
}
if (given->patternlen > 2 &&
!strcmp(given->pattern + given->patternlen - 2, "/*")) {
if (!(given->flags & PATTERN_FLAG_NEGATIVE)) {
/* Not a cone pattern. */
warning(_("unrecognized pattern: '%s'"), given->pattern);
goto clear_hashmaps;
}
truncated = dup_and_filter_pattern(given->pattern);
translated = xmalloc(sizeof(struct pattern_entry));
translated->pattern = truncated;
translated->patternlen = given->patternlen - 2;
hashmap_entry_init(&translated->ent,
fspathhash(translated->pattern));
if (!hashmap_get_entry(&pl->recursive_hashmap,
translated, ent, NULL)) {
/* We did not see the "parent" included */
warning(_("unrecognized negative pattern: '%s'"),
given->pattern);
free(truncated);
free(translated);
goto clear_hashmaps;
}
hashmap_add(&pl->parent_hashmap, &translated->ent);
hashmap_remove(&pl->recursive_hashmap, &translated->ent, &data);
free(data);
return;
}
if (given->flags & PATTERN_FLAG_NEGATIVE) {
warning(_("unrecognized negative pattern: '%s'"),
given->pattern);
goto clear_hashmaps;
}
translated = xmalloc(sizeof(struct pattern_entry));
translated->pattern = dup_and_filter_pattern(given->pattern);
translated->patternlen = given->patternlen;
hashmap_entry_init(&translated->ent,
fspathhash(translated->pattern));
hashmap_add(&pl->recursive_hashmap, &translated->ent);
if (hashmap_get_entry(&pl->parent_hashmap, translated, ent, NULL)) {
/* we already included this at the parent level */
warning(_("your sparse-checkout file may have issues: pattern '%s' is repeated"),
given->pattern);
goto clear_hashmaps;
}
return;
clear_hashmaps:
warning(_("disabling cone pattern matching"));
hashmap_clear_and_free(&pl->parent_hashmap, struct pattern_entry, ent);
hashmap_clear_and_free(&pl->recursive_hashmap, struct pattern_entry, ent);
pl->use_cone_patterns = 0;
}
static int hashmap_contains_path(struct hashmap *map,
struct strbuf *pattern)
{
struct pattern_entry p;
/* Check straight mapping */
p.pattern = pattern->buf;
p.patternlen = pattern->len;
hashmap_entry_init(&p.ent, fspathhash(p.pattern));
return !!hashmap_get_entry(map, &p, ent, NULL);
}
int hashmap_contains_parent(struct hashmap *map,
const char *path,
struct strbuf *buffer)
{
char *slash_pos;
strbuf_setlen(buffer, 0);
if (path[0] != '/')
strbuf_addch(buffer, '/');
strbuf_addstr(buffer, path);
slash_pos = strrchr(buffer->buf, '/');
while (slash_pos > buffer->buf) {
strbuf_setlen(buffer, slash_pos - buffer->buf);
if (hashmap_contains_path(map, buffer))
return 1;
slash_pos = strrchr(buffer->buf, '/');
}
return 0;
}
void add_pattern(const char *string, const char *base,
int baselen, struct pattern_list *pl, int srcpos)
{
struct path_pattern *pattern;
int patternlen;
unsigned flags;
int nowildcardlen;
parse_path_pattern(&string, &patternlen, &flags, &nowildcardlen);
if (flags & PATTERN_FLAG_MUSTBEDIR) {
FLEXPTR_ALLOC_MEM(pattern, pattern, string, patternlen);
} else {
pattern = xmalloc(sizeof(*pattern));
pattern->pattern = string;
}
pattern->patternlen = patternlen;
pattern->nowildcardlen = nowildcardlen;
pattern->base = base;
pattern->baselen = baselen;
pattern->flags = flags;
pattern->srcpos = srcpos;
ALLOC_GROW(pl->patterns, pl->nr + 1, pl->alloc);
pl->patterns[pl->nr++] = pattern;
pattern->pl = pl;
add_pattern_to_hashsets(pl, pattern);
}
static int read_skip_worktree_file_from_index(struct index_state *istate,
const char *path,
size_t *size_out, char **data_out,
struct oid_stat *oid_stat)
{
int pos, len;
len = strlen(path);
pos = index_name_pos(istate, path, len);
if (pos < 0)
return -1;
if (!ce_skip_worktree(istate->cache[pos]))
return -1;
return do_read_blob(&istate->cache[pos]->oid, oid_stat, size_out, data_out);
}
/*
* Frees memory within pl which was allocated for exclude patterns and
* the file buffer. Does not free pl itself.
*/
void clear_pattern_list(struct pattern_list *pl)
{
int i;
for (i = 0; i < pl->nr; i++)
free(pl->patterns[i]);
free(pl->patterns);
free(pl->filebuf);
hashmap_clear_and_free(&pl->recursive_hashmap, struct pattern_entry, ent);
hashmap_clear_and_free(&pl->parent_hashmap, struct pattern_entry, ent);
memset(pl, 0, sizeof(*pl));
}
static void trim_trailing_spaces(char *buf)
{
char *p, *last_space = NULL;
for (p = buf; *p; p++)
switch (*p) {
case ' ':
if (!last_space)
last_space = p;
break;
case '\\':
p++;
if (!*p)
return;
/* fallthrough */
default:
last_space = NULL;
}
if (last_space)
*last_space = '\0';
}
/*
* Given a subdirectory name and "dir" of the current directory,
* search the subdir in "dir" and return it, or create a new one if it
* does not exist in "dir".
*
* If "name" has the trailing slash, it'll be excluded in the search.
*/
static struct untracked_cache_dir *lookup_untracked(struct untracked_cache *uc,
struct untracked_cache_dir *dir,
const char *name, int len)
{
int first, last;
struct untracked_cache_dir *d;
if (!dir)
return NULL;
if (len && name[len - 1] == '/')
len--;
first = 0;
last = dir->dirs_nr;
while (last > first) {
int cmp, next = first + ((last - first) >> 1);
d = dir->dirs[next];
cmp = strncmp(name, d->name, len);
if (!cmp && strlen(d->name) > len)
cmp = -1;
if (!cmp)
return d;
if (cmp < 0) {
last = next;
continue;
}
first = next+1;
}
uc->dir_created++;
FLEX_ALLOC_MEM(d, name, name, len);
ALLOC_GROW(dir->dirs, dir->dirs_nr + 1, dir->dirs_alloc);
MOVE_ARRAY(dir->dirs + first + 1, dir->dirs + first,
dir->dirs_nr - first);
dir->dirs_nr++;
dir->dirs[first] = d;
return d;
}
static void do_invalidate_gitignore(struct untracked_cache_dir *dir)
{
int i;
dir->valid = 0;
dir->untracked_nr = 0;
for (i = 0; i < dir->dirs_nr; i++)
do_invalidate_gitignore(dir->dirs[i]);
}
static void invalidate_gitignore(struct untracked_cache *uc,
struct untracked_cache_dir *dir)
{
uc->gitignore_invalidated++;
do_invalidate_gitignore(dir);
}
static void invalidate_directory(struct untracked_cache *uc,
struct untracked_cache_dir *dir)
{
int i;
/*
* Invalidation increment here is just roughly correct. If
* untracked_nr or any of dirs[].recurse is non-zero, we
* should increment dir_invalidated too. But that's more
* expensive to do.
*/
if (dir->valid)
uc->dir_invalidated++;
dir->valid = 0;
dir->untracked_nr = 0;
for (i = 0; i < dir->dirs_nr; i++)
dir->dirs[i]->recurse = 0;
}
static int add_patterns_from_buffer(char *buf, size_t size,
const char *base, int baselen,
struct pattern_list *pl);
/* Flags for add_patterns() */
#define PATTERN_NOFOLLOW (1<<0)
/*
* Given a file with name "fname", read it (either from disk, or from
* an index if 'istate' is non-null), parse it and store the
* exclude rules in "pl".
*
* If "oid_stat" is not NULL, compute oid of the exclude file and fill
* stat data from disk (only valid if add_patterns returns zero). If
* oid_stat.valid is non-zero, "oid_stat" must contain good value as input.
*/
static int add_patterns(const char *fname, const char *base, int baselen,
struct pattern_list *pl, struct index_state *istate,
unsigned flags, struct oid_stat *oid_stat)
{
struct stat st;
int r;
int fd;
size_t size = 0;
char *buf;
if (flags & PATTERN_NOFOLLOW)
fd = open_nofollow(fname, O_RDONLY);
else
fd = open(fname, O_RDONLY);
if (fd < 0 || fstat(fd, &st) < 0) {
if (fd < 0)
warn_on_fopen_errors(fname);
else
close(fd);
if (!istate)
return -1;
r = read_skip_worktree_file_from_index(istate, fname,
&size, &buf,
oid_stat);
if (r != 1)
return r;
} else {
size = xsize_t(st.st_size);
if (size == 0) {
if (oid_stat) {
fill_stat_data(&oid_stat->stat, &st);
oidcpy(&oid_stat->oid, the_hash_algo->empty_blob);
oid_stat->valid = 1;
}
close(fd);
return 0;
}
buf = xmallocz(size);
if (read_in_full(fd, buf, size) != size) {
free(buf);
close(fd);
return -1;
}
buf[size++] = '\n';
close(fd);
if (oid_stat) {
int pos;
if (oid_stat->valid &&
!match_stat_data_racy(istate, &oid_stat->stat, &st))
; /* no content change, oid_stat->oid still good */
else if (istate &&
(pos = index_name_pos(istate, fname, strlen(fname))) >= 0 &&
!ce_stage(istate->cache[pos]) &&
ce_uptodate(istate->cache[pos]) &&
!would_convert_to_git(istate, fname))
oidcpy(&oid_stat->oid,
&istate->cache[pos]->oid);
else
hash_object_file(the_hash_algo, buf, size,
OBJ_BLOB, &oid_stat->oid);
fill_stat_data(&oid_stat->stat, &st);
oid_stat->valid = 1;
}
}
add_patterns_from_buffer(buf, size, base, baselen, pl);
return 0;
}
static int add_patterns_from_buffer(char *buf, size_t size,
const char *base, int baselen,
struct pattern_list *pl)
{
int i, lineno = 1;
char *entry;
hashmap_init(&pl->recursive_hashmap, pl_hashmap_cmp, NULL, 0);
hashmap_init(&pl->parent_hashmap, pl_hashmap_cmp, NULL, 0);
pl->filebuf = buf;
if (skip_utf8_bom(&buf, size))
size -= buf - pl->filebuf;
entry = buf;
for (i = 0; i < size; i++) {
if (buf[i] == '\n') {
if (entry != buf + i && entry[0] != '#') {
buf[i - (i && buf[i-1] == '\r')] = 0;
trim_trailing_spaces(entry);
add_pattern(entry, base, baselen, pl, lineno);
}
lineno++;
entry = buf + i + 1;
}
}
return 0;
}
int add_patterns_from_file_to_list(const char *fname, const char *base,
int baselen, struct pattern_list *pl,
struct index_state *istate,
unsigned flags)
{
return add_patterns(fname, base, baselen, pl, istate, flags, NULL);
}
int add_patterns_from_blob_to_list(
struct object_id *oid,
const char *base, int baselen,
struct pattern_list *pl)
{
char *buf;
size_t size;
int r;
r = do_read_blob(oid, NULL, &size, &buf);
if (r != 1)
return r;
add_patterns_from_buffer(buf, size, base, baselen, pl);
return 0;
}
struct pattern_list *add_pattern_list(struct dir_struct *dir,
int group_type, const char *src)
{
struct pattern_list *pl;
struct exclude_list_group *group;
group = &dir->exclude_list_group[group_type];
ALLOC_GROW(group->pl, group->nr + 1, group->alloc);
pl = &group->pl[group->nr++];
memset(pl, 0, sizeof(*pl));
pl->src = src;
return pl;
}
/*
* Used to set up core.excludesfile and .git/info/exclude lists.
*/
static void add_patterns_from_file_1(struct dir_struct *dir, const char *fname,
struct oid_stat *oid_stat)
{
struct pattern_list *pl;
/*
* catch setup_standard_excludes() that's called before
* dir->untracked is assigned. That function behaves
* differently when dir->untracked is non-NULL.
*/
if (!dir->untracked)
dir->unmanaged_exclude_files++;
pl = add_pattern_list(dir, EXC_FILE, fname);
if (add_patterns(fname, "", 0, pl, NULL, 0, oid_stat) < 0)
die(_("cannot use %s as an exclude file"), fname);
}
void add_patterns_from_file(struct dir_struct *dir, const char *fname)
{
dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
add_patterns_from_file_1(dir, fname, NULL);
}
int match_basename(const char *basename, int basenamelen,
const char *pattern, int prefix, int patternlen,
unsigned flags)
{
if (prefix == patternlen) {
if (patternlen == basenamelen &&
!fspathncmp(pattern, basename, basenamelen))
return 1;
} else if (flags & PATTERN_FLAG_ENDSWITH) {
/* "*literal" matching against "fooliteral" */
if (patternlen - 1 <= basenamelen &&
!fspathncmp(pattern + 1,
basename + basenamelen - (patternlen - 1),
patternlen - 1))
return 1;
} else {
if (fnmatch_icase_mem(pattern, patternlen,
basename, basenamelen,
0) == 0)
return 1;
}
return 0;
}
int match_pathname(const char *pathname, int pathlen,
const char *base, int baselen,
const char *pattern, int prefix, int patternlen)
{
const char *name;
int namelen;
/*
* match with FNM_PATHNAME; the pattern has base implicitly
* in front of it.
*/
if (*pattern == '/') {
pattern++;
patternlen--;
prefix--;
}
/*
* baselen does not count the trailing slash. base[] may or
* may not end with a trailing slash though.
*/
if (pathlen < baselen + 1 ||
(baselen && pathname[baselen] != '/') ||
fspathncmp(pathname, base, baselen))
return 0;
namelen = baselen ? pathlen - baselen - 1 : pathlen;
name = pathname + pathlen - namelen;
if (prefix) {
/*
* if the non-wildcard part is longer than the
* remaining pathname, surely it cannot match.
*/
if (prefix > namelen)
return 0;
if (fspathncmp(pattern, name, prefix))
return 0;
pattern += prefix;
patternlen -= prefix;
name += prefix;
namelen -= prefix;
/*
* If the whole pattern did not have a wildcard,
* then our prefix match is all we need; we
* do not need to call fnmatch at all.
*/
if (!patternlen && !namelen)
return 1;
}
return fnmatch_icase_mem(pattern, patternlen,
name, namelen,
WM_PATHNAME) == 0;
}
/*
* Scan the given exclude list in reverse to see whether pathname
* should be ignored. The first match (i.e. the last on the list), if
* any, determines the fate. Returns the exclude_list element which
* matched, or NULL for undecided.
*/
static struct path_pattern *last_matching_pattern_from_list(const char *pathname,
int pathlen,
const char *basename,
int *dtype,
struct pattern_list *pl,
struct index_state *istate)
{
struct path_pattern *res = NULL; /* undecided */
int i;
if (!pl->nr)
return NULL; /* undefined */
for (i = pl->nr - 1; 0 <= i; i--) {
struct path_pattern *pattern = pl->patterns[i];
const char *exclude = pattern->pattern;
int prefix = pattern->nowildcardlen;
if (pattern->flags & PATTERN_FLAG_MUSTBEDIR) {
*dtype = resolve_dtype(*dtype, istate, pathname, pathlen);
if (*dtype != DT_DIR)
continue;
}
if (pattern->flags & PATTERN_FLAG_NODIR) {
if (match_basename(basename,
pathlen - (basename - pathname),
exclude, prefix, pattern->patternlen,
pattern->flags)) {
res = pattern;
break;
}
continue;
}
assert(pattern->baselen == 0 ||
pattern->base[pattern->baselen - 1] == '/');
if (match_pathname(pathname, pathlen,
pattern->base,
pattern->baselen ? pattern->baselen - 1 : 0,
exclude, prefix, pattern->patternlen)) {
res = pattern;
break;
}
}
return res;
}
/*
* Scan the list of patterns to determine if the ordered list
* of patterns matches on 'pathname'.
*
* Return 1 for a match, 0 for not matched and -1 for undecided.
*/
enum pattern_match_result path_matches_pattern_list(
const char *pathname, int pathlen,
const char *basename, int *dtype,
struct pattern_list *pl,
struct index_state *istate)
{
struct path_pattern *pattern;
struct strbuf parent_pathname = STRBUF_INIT;
int result = NOT_MATCHED;
size_t slash_pos;
if (!pl->use_cone_patterns) {
pattern = last_matching_pattern_from_list(pathname, pathlen, basename,
dtype, pl, istate);
if (pattern) {
if (pattern->flags & PATTERN_FLAG_NEGATIVE)
return NOT_MATCHED;
else
return MATCHED;
}
return UNDECIDED;
}
if (pl->full_cone)
return MATCHED;
strbuf_addch(&parent_pathname, '/');
strbuf_add(&parent_pathname, pathname, pathlen);
/*
* Directory entries are matched if and only if a file
* contained immediately within them is matched. For the
* case of a directory entry, modify the path to create
* a fake filename within this directory, allowing us to
* use the file-base matching logic in an equivalent way.
*/
if (parent_pathname.len > 0 &&
parent_pathname.buf[parent_pathname.len - 1] == '/') {
slash_pos = parent_pathname.len - 1;
strbuf_add(&parent_pathname, "-", 1);
} else {
const char *slash_ptr = strrchr(parent_pathname.buf, '/');
slash_pos = slash_ptr ? slash_ptr - parent_pathname.buf : 0;
}
if (hashmap_contains_path(&pl->recursive_hashmap,
&parent_pathname)) {
result = MATCHED_RECURSIVE;
goto done;
}
if (!slash_pos) {
/* include every file in root */
result = MATCHED;
goto done;
}
strbuf_setlen(&parent_pathname, slash_pos);
if (hashmap_contains_path(&pl->parent_hashmap, &parent_pathname)) {
result = MATCHED;
goto done;
}
if (hashmap_contains_parent(&pl->recursive_hashmap,
pathname,
&parent_pathname))
result = MATCHED_RECURSIVE;
done:
strbuf_release(&parent_pathname);
return result;
}
int init_sparse_checkout_patterns(struct index_state *istate)
{
if (!core_apply_sparse_checkout)
return 1;
if (istate->sparse_checkout_patterns)
return 0;
CALLOC_ARRAY(istate->sparse_checkout_patterns, 1);
if (get_sparse_checkout_patterns(istate->sparse_checkout_patterns) < 0) {
FREE_AND_NULL(istate->sparse_checkout_patterns);
return -1;
}
return 0;
}
static int path_in_sparse_checkout_1(const char *path,
struct index_state *istate,
int require_cone_mode)
{
int dtype = DT_REG;
enum pattern_match_result match = UNDECIDED;
const char *end, *slash;
/*
* We default to accepting a path if the path is empty, there are no
* patterns, or the patterns are of the wrong type.
*/
if (!*path ||
init_sparse_checkout_patterns(istate) ||
(require_cone_mode &&
!istate->sparse_checkout_patterns->use_cone_patterns))
return 1;
/*
* If UNDECIDED, use the match from the parent dir (recursively), or
* fall back to NOT_MATCHED at the topmost level. Note that cone mode
* never returns UNDECIDED, so we will execute only one iteration in
* this case.
*/
for (end = path + strlen(path);
end > path && match == UNDECIDED;
end = slash) {
for (slash = end - 1; slash > path && *slash != '/'; slash--)
; /* do nothing */
match = path_matches_pattern_list(path, end - path,
slash > path ? slash + 1 : path, &dtype,
istate->sparse_checkout_patterns, istate);
/* We are going to match the parent dir now */
dtype = DT_DIR;
}
return match > 0;
}
int path_in_sparse_checkout(const char *path,
struct index_state *istate)
{
return path_in_sparse_checkout_1(path, istate, 0);
}
int path_in_cone_mode_sparse_checkout(const char *path,
struct index_state *istate)
{
return path_in_sparse_checkout_1(path, istate, 1);
}
static struct path_pattern *last_matching_pattern_from_lists(
struct dir_struct *dir, struct index_state *istate,
const char *pathname, int pathlen,
const char *basename, int *dtype_p)
{
int i, j;
struct exclude_list_group *group;
struct path_pattern *pattern;
for (i = EXC_CMDL; i <= EXC_FILE; i++) {
group = &dir->exclude_list_group[i];
for (j = group->nr - 1; j >= 0; j--) {
pattern = last_matching_pattern_from_list(
pathname, pathlen, basename, dtype_p,
&group->pl[j], istate);
if (pattern)
return pattern;
}
}
return NULL;
}
/*
* Loads the per-directory exclude list for the substring of base
* which has a char length of baselen.
*/
static void prep_exclude(struct dir_struct *dir,
struct index_state *istate,
const char *base, int baselen)
{
struct exclude_list_group *group;
struct pattern_list *pl;
struct exclude_stack *stk = NULL;
struct untracked_cache_dir *untracked;
int current;
group = &dir->exclude_list_group[EXC_DIRS];
/*
* Pop the exclude lists from the EXCL_DIRS exclude_list_group
* which originate from directories not in the prefix of the
* path being checked.
*/
while ((stk = dir->exclude_stack) != NULL) {
if (stk->baselen <= baselen &&
!strncmp(dir->basebuf.buf, base, stk->baselen))
break;
pl = &group->pl[dir->exclude_stack->exclude_ix];
dir->exclude_stack = stk->prev;
dir->pattern = NULL;
free((char *)pl->src); /* see strbuf_detach() below */
clear_pattern_list(pl);
free(stk);
group->nr--;
}
/* Skip traversing into sub directories if the parent is excluded */
if (dir->pattern)
return;
/*
* Lazy initialization. All call sites currently just
* memset(dir, 0, sizeof(*dir)) before use. Changing all of
* them seems lots of work for little benefit.
*/
if (!dir->basebuf.buf)
strbuf_init(&dir->basebuf, PATH_MAX);
/* Read from the parent directories and push them down. */
current = stk ? stk->baselen : -1;
strbuf_setlen(&dir->basebuf, current < 0 ? 0 : current);
if (dir->untracked)
untracked = stk ? stk->ucd : dir->untracked->root;
else
untracked = NULL;
while (current < baselen) {
const char *cp;
struct oid_stat oid_stat;
CALLOC_ARRAY(stk, 1);
if (current < 0) {
cp = base;
current = 0;
} else {
cp = strchr(base + current + 1, '/');
if (!cp)
die("oops in prep_exclude");
cp++;
untracked =
lookup_untracked(dir->untracked, untracked,
base + current,
cp - base - current);
}
stk->prev = dir->exclude_stack;
stk->baselen = cp - base;
stk->exclude_ix = group->nr;
stk->ucd = untracked;
pl = add_pattern_list(dir, EXC_DIRS, NULL);
strbuf_add(&dir->basebuf, base + current, stk->baselen - current);
assert(stk->baselen == dir->basebuf.len);
/* Abort if the directory is excluded */
if (stk->baselen) {
int dt = DT_DIR;
dir->basebuf.buf[stk->baselen - 1] = 0;
dir->pattern = last_matching_pattern_from_lists(dir,
istate,
dir->basebuf.buf, stk->baselen - 1,
dir->basebuf.buf + current, &dt);
dir->basebuf.buf[stk->baselen - 1] = '/';
if (dir->pattern &&
dir->pattern->flags & PATTERN_FLAG_NEGATIVE)
dir->pattern = NULL;
if (dir->pattern) {
dir->exclude_stack = stk;
return;
}
}
/* Try to read per-directory file */
oidclr(&oid_stat.oid);
oid_stat.valid = 0;
if (dir->exclude_per_dir &&
/*
* If we know that no files have been added in
* this directory (i.e. valid_cached_dir() has
* been executed and set untracked->valid) ..
*/
(!untracked || !untracked->valid ||
/*
* .. and .gitignore does not exist before
* (i.e. null exclude_oid). Then we can skip
* loading .gitignore, which would result in
* ENOENT anyway.
*/
!is_null_oid(&untracked->exclude_oid))) {
/*
* dir->basebuf gets reused by the traversal, but we
* need fname to remain unchanged to ensure the src
* member of each struct path_pattern correctly
* back-references its source file. Other invocations
* of add_pattern_list provide stable strings, so we
* strbuf_detach() and free() here in the caller.
*/
struct strbuf sb = STRBUF_INIT;
strbuf_addbuf(&sb, &dir->basebuf);
strbuf_addstr(&sb, dir->exclude_per_dir);
pl->src = strbuf_detach(&sb, NULL);
add_patterns(pl->src, pl->src, stk->baselen, pl, istate,
PATTERN_NOFOLLOW,
untracked ? &oid_stat : NULL);
}
/*
* NEEDSWORK: when untracked cache is enabled, prep_exclude()
* will first be called in valid_cached_dir() then maybe many
* times more in last_matching_pattern(). When the cache is
* used, last_matching_pattern() will not be called and
* reading .gitignore content will be a waste.
*
* So when it's called by valid_cached_dir() and we can get
* .gitignore SHA-1 from the index (i.e. .gitignore is not
* modified on work tree), we could delay reading the
* .gitignore content until we absolutely need it in
* last_matching_pattern(). Be careful about ignore rule
* order, though, if you do that.
*/
if (untracked &&
!oideq(&oid_stat.oid, &untracked->exclude_oid)) {
invalidate_gitignore(dir->untracked, untracked);
oidcpy(&untracked->exclude_oid, &oid_stat.oid);
}
dir->exclude_stack = stk;
current = stk->baselen;
}
strbuf_setlen(&dir->basebuf, baselen);
}
/*
* Loads the exclude lists for the directory containing pathname, then
* scans all exclude lists to determine whether pathname is excluded.
* Returns the exclude_list element which matched, or NULL for
* undecided.
*/
struct path_pattern *last_matching_pattern(struct dir_struct *dir,
struct index_state *istate,
const char *pathname,
int *dtype_p)
{
int pathlen = strlen(pathname);
const char *basename = strrchr(pathname, '/');
basename = (basename) ? basename+1 : pathname;
prep_exclude(dir, istate, pathname, basename-pathname);
if (dir->pattern)
return dir->pattern;
return last_matching_pattern_from_lists(dir, istate, pathname, pathlen,
basename, dtype_p);
}
/*
* Loads the exclude lists for the directory containing pathname, then
* scans all exclude lists to determine whether pathname is excluded.
* Returns 1 if true, otherwise 0.
*/
int is_excluded(struct dir_struct *dir, struct index_state *istate,
const char *pathname, int *dtype_p)
{
struct path_pattern *pattern =
last_matching_pattern(dir, istate, pathname, dtype_p);
if (pattern)
return pattern->flags & PATTERN_FLAG_NEGATIVE ? 0 : 1;
return 0;
}
static struct dir_entry *dir_entry_new(const char *pathname, int len)
{
struct dir_entry *ent;
FLEX_ALLOC_MEM(ent, name, pathname, len);
ent->len = len;
return ent;
}
static struct dir_entry *dir_add_name(struct dir_struct *dir,
struct index_state *istate,
const char *pathname, int len)
{
if (index_file_exists(istate, pathname, len, ignore_case))
return NULL;
ALLOC_GROW(dir->entries, dir->nr+1, dir->alloc);
return dir->entries[dir->nr++] = dir_entry_new(pathname, len);
}
struct dir_entry *dir_add_ignored(struct dir_struct *dir,
struct index_state *istate,
const char *pathname, int len)
{
if (!index_name_is_other(istate, pathname, len))
return NULL;
ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
return dir->ignored[dir->ignored_nr++] = dir_entry_new(pathname, len);
}
enum exist_status {
index_nonexistent = 0,
index_directory,
index_gitdir
};
/*
* Do not use the alphabetically sorted index to look up
* the directory name; instead, use the case insensitive
* directory hash.
*/
static enum exist_status directory_exists_in_index_icase(struct index_state *istate,
const char *dirname, int len)
{
struct cache_entry *ce;
if (index_dir_exists(istate, dirname, len))
return index_directory;
ce = index_file_exists(istate, dirname, len, ignore_case);
if (ce && S_ISGITLINK(ce->ce_mode))
return index_gitdir;
return index_nonexistent;
}
/*
* The index sorts alphabetically by entry name, which
* means that a gitlink sorts as '\0' at the end, while
* a directory (which is defined not as an entry, but as
* the files it contains) will sort with the '/' at the
* end.
*/
static enum exist_status directory_exists_in_index(struct index_state *istate,
const char *dirname, int len)
{
int pos;
if (ignore_case)
return directory_exists_in_index_icase(istate, dirname, len);
pos = index_name_pos(istate, dirname, len);
if (pos < 0)
pos = -pos-1;
while (pos < istate->cache_nr) {
const struct cache_entry *ce = istate->cache[pos++];
unsigned char endchar;
if (strncmp(ce->name, dirname, len))
break;
endchar = ce->name[len];
if (endchar > '/')
break;
if (endchar == '/')
return index_directory;
if (!endchar && S_ISGITLINK(ce->ce_mode))
return index_gitdir;
}
return index_nonexistent;
}
/*
* When we find a directory when traversing the filesystem, we
* have three distinct cases:
*
* - ignore it
* - see it as a directory
* - recurse into it
*
* and which one we choose depends on a combination of existing
* git index contents and the flags passed into the directory
* traversal routine.
*
* Case 1: If we *already* have entries in the index under that
* directory name, we always recurse into the directory to see
* all the files.
*
* Case 2: If we *already* have that directory name as a gitlink,
* we always continue to see it as a gitlink, regardless of whether
* there is an actual git directory there or not (it might not
* be checked out as a subproject!)
*
* Case 3: if we didn't have it in the index previously, we
* have a few sub-cases:
*
* (a) if DIR_SHOW_OTHER_DIRECTORIES flag is set, we show it as
* just a directory, unless DIR_HIDE_EMPTY_DIRECTORIES is
* also true, in which case we need to check if it contains any
* untracked and / or ignored files.
* (b) if it looks like a git directory and we don't have the
* DIR_NO_GITLINKS flag, then we treat it as a gitlink, and
* show it as a directory.
* (c) otherwise, we recurse into it.
*/
static enum path_treatment treat_directory(struct dir_struct *dir,
struct index_state *istate,
struct untracked_cache_dir *untracked,
const char *dirname, int len, int baselen, int excluded,
const struct pathspec *pathspec)
{
/*
* WARNING: From this function, you can return path_recurse or you
* can call read_directory_recursive() (or neither), but
* you CAN'T DO BOTH.
*/
enum path_treatment state;
int matches_how = 0;
int check_only, stop_early;
int old_ignored_nr, old_untracked_nr;
/* The "len-1" is to strip the final '/' */
enum exist_status status = directory_exists_in_index(istate, dirname, len-1);
if (status == index_directory)
return path_recurse;
if (status == index_gitdir)
return path_none;
if (status != index_nonexistent)
BUG("Unhandled value for directory_exists_in_index: %d\n", status);
/*
* We don't want to descend into paths that don't match the necessary
* patterns. Clearly, if we don't have a pathspec, then we can't check
* for matching patterns. Also, if (excluded) then we know we matched
* the exclusion patterns so as an optimization we can skip checking
* for matching patterns.
*/
if (pathspec && !excluded) {
matches_how = match_pathspec_with_flags(istate, pathspec,
dirname, len,
0 /* prefix */,
NULL /* seen */,
DO_MATCH_LEADING_PATHSPEC);
if (!matches_how)
return path_none;
}
if ((dir->flags & DIR_SKIP_NESTED_GIT) ||
!(dir->flags & DIR_NO_GITLINKS)) {
/*
* Determine if `dirname` is a nested repo by confirming that:
* 1) we are in a nonbare repository, and
* 2) `dirname` is not an immediate parent of `the_repository->gitdir`,
* which could occur if the git_dir or worktree location was
* manually configured by the user; see t2205 testcases 1-3 for
* examples where this matters
*/
int nested_repo;
struct strbuf sb = STRBUF_INIT;
strbuf_addstr(&sb, dirname);
nested_repo = is_nonbare_repository_dir(&sb);
if (nested_repo) {
char *real_dirname, *real_gitdir;
strbuf_addstr(&sb, ".git");
real_dirname = real_pathdup(sb.buf, 1);
real_gitdir = real_pathdup(the_repository->gitdir, 1);
nested_repo = !!strcmp(real_dirname, real_gitdir);
free(real_gitdir);
free(real_dirname);
}
strbuf_release(&sb);
if (nested_repo) {
if ((dir->flags & DIR_SKIP_NESTED_GIT) ||
(matches_how == MATCHED_RECURSIVELY_LEADING_PATHSPEC))
return path_none;
return excluded ? path_excluded : path_untracked;
}
}
if (!(dir->flags & DIR_SHOW_OTHER_DIRECTORIES)) {
if (excluded &&
(dir->flags & DIR_SHOW_IGNORED_TOO) &&
(dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING)) {
/*
* This is an excluded directory and we are
* showing ignored paths that match an exclude
* pattern. (e.g. show directory as ignored
* only if it matches an exclude pattern).
* This path will either be 'path_excluded`
* (if we are showing empty directories or if
* the directory is not empty), or will be
* 'path_none' (empty directory, and we are
* not showing empty directories).
*/
if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
return path_excluded;
if (read_directory_recursive(dir, istate, dirname, len,
untracked, 1, 1, pathspec) == path_excluded)
return path_excluded;
return path_none;
}
return path_recurse;
}
assert(dir->flags & DIR_SHOW_OTHER_DIRECTORIES);
/*
* If we have a pathspec which could match something _below_ this
* directory (e.g. when checking 'subdir/' having a pathspec like
* 'subdir/some/deep/path/file' or 'subdir/widget-*.c'), then we
* need to recurse.
*/
if (matches_how == MATCHED_RECURSIVELY_LEADING_PATHSPEC)
return path_recurse;
/* Special cases for where this directory is excluded/ignored */
if (excluded) {
/*
* If DIR_SHOW_OTHER_DIRECTORIES is set and we're not
* hiding empty directories, there is no need to
* recurse into an ignored directory.
*/
if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
return path_excluded;
/*
* Even if we are hiding empty directories, we can still avoid
* recursing into ignored directories for DIR_SHOW_IGNORED_TOO
* if DIR_SHOW_IGNORED_TOO_MODE_MATCHING is also set.
*/
if ((dir->flags & DIR_SHOW_IGNORED_TOO) &&
(dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING))
return path_excluded;
}
/*
* Other than the path_recurse case above, we only need to
* recurse into untracked directories if any of the following
* bits is set:
* - DIR_SHOW_IGNORED (because then we need to determine if
* there are ignored entries below)
* - DIR_SHOW_IGNORED_TOO (same as above)
* - DIR_HIDE_EMPTY_DIRECTORIES (because we have to determine if
* the directory is empty)
*/
if (!excluded &&
!(dir->flags & (DIR_SHOW_IGNORED |
DIR_SHOW_IGNORED_TOO |
DIR_HIDE_EMPTY_DIRECTORIES))) {
return path_untracked;
}
/*
* Even if we don't want to know all the paths under an untracked or
* ignored directory, we may still need to go into the directory to
* determine if it is empty (because with DIR_HIDE_EMPTY_DIRECTORIES,
* an empty directory should be path_none instead of path_excluded or
* path_untracked).
*/
check_only = ((dir->flags & DIR_HIDE_EMPTY_DIRECTORIES) &&
!(dir->flags & DIR_SHOW_IGNORED_TOO));
/*
* However, there's another optimization possible as a subset of
* check_only, based on the cases we have to consider:
* A) Directory matches no exclude patterns:
* * Directory is empty => path_none
* * Directory has an untracked file under it => path_untracked
* * Directory has only ignored files under it => path_excluded
* B) Directory matches an exclude pattern:
* * Directory is empty => path_none
* * Directory has an untracked file under it => path_excluded
* * Directory has only ignored files under it => path_excluded
* In case A, we can exit as soon as we've found an untracked
* file but otherwise have to walk all files. In case B, though,
* we can stop at the first file we find under the directory.
*/
stop_early = check_only && excluded;
/*
* If /every/ file within an untracked directory is ignored, then
* we want to treat the directory as ignored (for e.g. status
* --porcelain), without listing the individual ignored files
* underneath. To do so, we'll save the current ignored_nr, and
* pop all the ones added after it if it turns out the entire
* directory is ignored. Also, when DIR_SHOW_IGNORED_TOO and
* !DIR_KEEP_UNTRACKED_CONTENTS then we don't want to show
* untracked paths so will need to pop all those off the last
* after we traverse.
*/
old_ignored_nr = dir->ignored_nr;
old_untracked_nr = dir->nr;
/* Actually recurse into dirname now, we'll fixup the state later. */
untracked = lookup_untracked(dir->untracked, untracked,
dirname + baselen, len - baselen);
state = read_directory_recursive(dir, istate, dirname, len, untracked,
check_only, stop_early, pathspec);
/* There are a variety of reasons we may need to fixup the state... */
if (state == path_excluded) {
/* state == path_excluded implies all paths under
* dirname were ignored...
*
* if running e.g. `git status --porcelain --ignored=matching`,
* then we want to see the subpaths that are ignored.
*
* if running e.g. just `git status --porcelain`, then
* we just want the directory itself to be listed as ignored
* and not the individual paths underneath.
*/
int want_ignored_subpaths =
((dir->flags & DIR_SHOW_IGNORED_TOO) &&
(dir->flags & DIR_SHOW_IGNORED_TOO_MODE_MATCHING));
if (want_ignored_subpaths) {
/*
* with --ignored=matching, we want the subpaths
* INSTEAD of the directory itself.
*/
state = path_none;
} else {
int i;
for (i = old_ignored_nr + 1; i<dir->ignored_nr; ++i)
FREE_AND_NULL(dir->ignored[i]);
dir->ignored_nr = old_ignored_nr;
}
}
/*
* We may need to ignore some of the untracked paths we found while
* traversing subdirectories.
*/
if ((dir->flags & DIR_SHOW_IGNORED_TOO) &&
!(dir->flags & DIR_KEEP_UNTRACKED_CONTENTS)) {
int i;
for (i = old_untracked_nr + 1; i<dir->nr; ++i)
FREE_AND_NULL(dir->entries[i]);
dir->nr = old_untracked_nr;
}
/*
* If there is nothing under the current directory and we are not
* hiding empty directories, then we need to report on the
* untracked or ignored status of the directory itself.
*/
if (state == path_none && !(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
state = excluded ? path_excluded : path_untracked;
return state;
}
/*
* This is an inexact early pruning of any recursive directory
* reading - if the path cannot possibly be in the pathspec,
* return true, and we'll skip it early.
*/
static int simplify_away(const char *path, int pathlen,
const struct pathspec *pathspec)
{
int i;
if (!pathspec || !pathspec->nr)
return 0;
GUARD_PATHSPEC(pathspec,
PATHSPEC_FROMTOP |
PATHSPEC_MAXDEPTH |
PATHSPEC_LITERAL |
PATHSPEC_GLOB |
PATHSPEC_ICASE |
PATHSPEC_EXCLUDE |
PATHSPEC_ATTR);
for (i = 0; i < pathspec->nr; i++) {
const struct pathspec_item *item = &pathspec->items[i];
int len = item->nowildcard_len;
if (len > pathlen)
len = pathlen;
if (!ps_strncmp(item, item->match, path, len))
return 0;
}
return 1;
}
/*
* This function tells us whether an excluded path matches a
* list of "interesting" pathspecs. That is, whether a path matched
* by any of the pathspecs could possibly be ignored by excluding
* the specified path. This can happen if:
*
* 1. the path is mentioned explicitly in the pathspec
*
* 2. the path is a directory prefix of some element in the
* pathspec
*/
static int exclude_matches_pathspec(const char *path, int pathlen,
const struct pathspec *pathspec)
{
int i;
if (!pathspec || !pathspec->nr)
return 0;
GUARD_PATHSPEC(pathspec,
PATHSPEC_FROMTOP |
PATHSPEC_MAXDEPTH |
PATHSPEC_LITERAL |
PATHSPEC_GLOB |
PATHSPEC_ICASE |
PATHSPEC_EXCLUDE);
for (i = 0; i < pathspec->nr; i++) {
const struct pathspec_item *item = &pathspec->items[i];
int len = item->nowildcard_len;
if (len == pathlen &&
!ps_strncmp(item, item->match, path, pathlen))
return 1;
if (len > pathlen &&
item->match[pathlen] == '/' &&
!ps_strncmp(item, item->match, path, pathlen))
return 1;
}
return 0;
}
static int get_index_dtype(struct index_state *istate,
const char *path, int len)
{
int pos;
const struct cache_entry *ce;
ce = index_file_exists(istate, path, len, 0);
if (ce) {
if (!ce_uptodate(ce))
return DT_UNKNOWN;
if (S_ISGITLINK(ce->ce_mode))
return DT_DIR;
/*
* Nobody actually cares about the
* difference between DT_LNK and DT_REG
*/
return DT_REG;
}
/* Try to look it up as a directory */
pos = index_name_pos(istate, path, len);
if (pos >= 0)
return DT_UNKNOWN;
pos = -pos-1;
while (pos < istate->cache_nr) {
ce = istate->cache[pos++];
if (strncmp(ce->name, path, len))
break;
if (ce->name[len] > '/')
break;
if (ce->name[len] < '/')
continue;
if (!ce_uptodate(ce))
break; /* continue? */
return DT_DIR;
}
return DT_UNKNOWN;
}
static int resolve_dtype(int dtype, struct index_state *istate,
const char *path, int len)
{
struct stat st;
if (dtype != DT_UNKNOWN)
return dtype;
dtype = get_index_dtype(istate, path, len);
if (dtype != DT_UNKNOWN)
return dtype;
if (lstat(path, &st))
return dtype;
if (S_ISREG(st.st_mode))
return DT_REG;
if (S_ISDIR(st.st_mode))
return DT_DIR;
if (S_ISLNK(st.st_mode))
return DT_LNK;
return dtype;
}
static enum path_treatment treat_path_fast(struct dir_struct *dir,
struct cached_dir *cdir,
struct index_state *istate,
struct strbuf *path,
int baselen,
const struct pathspec *pathspec)
{
/*
* WARNING: From this function, you can return path_recurse or you
* can call read_directory_recursive() (or neither), but
* you CAN'T DO BOTH.
*/
strbuf_setlen(path, baselen);
if (!cdir->ucd) {
strbuf_addstr(path, cdir->file);
return path_untracked;
}
strbuf_addstr(path, cdir->ucd->name);
/* treat_one_path() does this before it calls treat_directory() */
strbuf_complete(path, '/');
if (cdir->ucd->check_only)
/*
* check_only is set as a result of treat_directory() getting
* to its bottom. Verify again the same set of directories
* with check_only set.
*/
return read_directory_recursive(dir, istate, path->buf, path->len,
cdir->ucd, 1, 0, pathspec);
/*
* We get path_recurse in the first run when
* directory_exists_in_index() returns index_nonexistent. We
* are sure that new changes in the index does not impact the
* outcome. Return now.
*/
return path_recurse;
}
static enum path_treatment treat_path(struct dir_struct *dir,
struct untracked_cache_dir *untracked,
struct cached_dir *cdir,
struct index_state *istate,
struct strbuf *path,
int baselen,
const struct pathspec *pathspec)
{
int has_path_in_index, dtype, excluded;
if (!cdir->d_name)
return treat_path_fast(dir, cdir, istate, path,
baselen, pathspec);
if (is_dot_or_dotdot(cdir->d_name) || !fspathcmp(cdir->d_name, ".git"))
return path_none;
strbuf_setlen(path, baselen);
strbuf_addstr(path, cdir->d_name);
if (simplify_away(path->buf, path->len, pathspec))
return path_none;
dtype = resolve_dtype(cdir->d_type, istate, path->buf, path->len);
/* Always exclude indexed files */
has_path_in_index = !!index_file_exists(istate, path->buf, path->len,
ignore_case);
if (dtype != DT_DIR && has_path_in_index)
return path_none;
/*
* When we are looking at a directory P in the working tree,
* there are three cases:
*
* (1) P exists in the index. Everything inside the directory P in
* the working tree needs to go when P is checked out from the
* index.
*
* (2) P does not exist in the index, but there is P/Q in the index.
* We know P will stay a directory when we check out the contents
* of the index, but we do not know yet if there is a directory
* P/Q in the working tree to be killed, so we need to recurse.
*
* (3) P does not exist in the index, and there is no P/Q in the index
* to require P to be a directory, either. Only in this case, we
* know that everything inside P will not be killed without
* recursing.
*/
if ((dir->flags & DIR_COLLECT_KILLED_ONLY) &&
(dtype == DT_DIR) &&
!has_path_in_index &&
(directory_exists_in_index(istate, path->buf, path->len) == index_nonexistent))
return path_none;
excluded = is_excluded(dir, istate, path->buf, &dtype);
/*
* Excluded? If we don't explicitly want to show
* ignored files, ignore it
*/
if (excluded && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
return path_excluded;
switch (dtype) {
default:
return path_none;
case DT_DIR:
/*
* WARNING: Do not ignore/amend the return value from
* treat_directory(), and especially do not change it to return
* path_recurse as that can cause exponential slowdown.
* Instead, modify treat_directory() to return the right value.
*/
strbuf_addch(path, '/');
return treat_directory(dir, istate, untracked,
path->buf, path->len,
baselen, excluded, pathspec);
case DT_REG:
case DT_LNK:
if (pathspec &&
!match_pathspec(istate, pathspec, path->buf, path->len,
0 /* prefix */, NULL /* seen */,
0 /* is_dir */))
return path_none;
if (excluded)
return path_excluded;
return path_untracked;
}
}
static void add_untracked(struct untracked_cache_dir *dir, const char *name)
{
if (!dir)
return;
ALLOC_GROW(dir->untracked, dir->untracked_nr + 1,
dir->untracked_alloc);
dir->untracked[dir->untracked_nr++] = xstrdup(name);
}
static int valid_cached_dir(struct dir_struct *dir,
struct untracked_cache_dir *untracked,
struct index_state *istate,
struct strbuf *path,
int check_only)
{
struct stat st;
if (!untracked)
return 0;
/*
* With fsmonitor, we can trust the untracked cache's valid field.
*/
refresh_fsmonitor(istate);
if (!(dir->untracked->use_fsmonitor && untracked->valid)) {
if (lstat(path->len ? path->buf : ".", &st)) {
memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
return 0;
}
if (!untracked->valid ||
match_stat_data_racy(istate, &untracked->stat_data, &st)) {
fill_stat_data(&untracked->stat_data, &st);
return 0;
}
}
if (untracked->check_only != !!check_only)
return 0;
/*
* prep_exclude will be called eventually on this directory,
* but it's called much later in last_matching_pattern(). We
* need it now to determine the validity of the cache for this
* path. The next calls will be nearly no-op, the way
* prep_exclude() is designed.
*/
if (path->len && path->buf[path->len - 1] != '/') {
strbuf_addch(path, '/');
prep_exclude(dir, istate, path->buf, path->len);
strbuf_setlen(path, path->len - 1);
} else
prep_exclude(dir, istate, path->buf, path->len);
/* hopefully prep_exclude() haven't invalidated this entry... */
return untracked->valid;
}
static int open_cached_dir(struct cached_dir *cdir,
struct dir_struct *dir,
struct untracked_cache_dir *untracked,
struct index_state *istate,
struct strbuf *path,
int check_only)
{
const char *c_path;
memset(cdir, 0, sizeof(*cdir));
cdir->untracked = untracked;
if (valid_cached_dir(dir, untracked, istate, path, check_only))
return 0;
c_path = path->len ? path->buf : ".";
cdir->fdir = opendir(c_path);
if (!cdir->fdir)
warning_errno(_("could not open directory '%s'"), c_path);
if (dir->untracked) {
invalidate_directory(dir->untracked, untracked);
dir->untracked->dir_opened++;
}
if (!cdir->fdir)
return -1;
return 0;
}
static int read_cached_dir(struct cached_dir *cdir)
{
struct dirent *de;
if (cdir->fdir) {
de = readdir_skip_dot_and_dotdot(cdir->fdir);
if (!de) {
cdir->d_name = NULL;
cdir->d_type = DT_UNKNOWN;
return -1;
}
cdir->d_name = de->d_name;
cdir->d_type = DTYPE(de);
return 0;
}
while (cdir->nr_dirs < cdir->untracked->dirs_nr) {
struct untracked_cache_dir *d = cdir->untracked->dirs[cdir->nr_dirs];
if (!d->recurse) {
cdir->nr_dirs++;
continue;
}
cdir->ucd = d;
cdir->nr_dirs++;
return 0;
}
cdir->ucd = NULL;
if (cdir->nr_files < cdir->untracked->untracked_nr) {
struct untracked_cache_dir *d = cdir->untracked;
cdir->file = d->untracked[cdir->nr_files++];
return 0;
}
return -1;
}
static void close_cached_dir(struct cached_dir *cdir)
{
if (cdir->fdir)
closedir(cdir->fdir);
/*
* We have gone through this directory and found no untracked
* entries. Mark it valid.
*/
if (cdir->untracked) {
cdir->untracked->valid = 1;
cdir->untracked->recurse = 1;
}
}
static void add_path_to_appropriate_result_list(struct dir_struct *dir,
struct untracked_cache_dir *untracked,
struct cached_dir *cdir,
struct index_state *istate,
struct strbuf *path,
int baselen,
const struct pathspec *pathspec,
enum path_treatment state)
{
/* add the path to the appropriate result list */
switch (state) {
case path_excluded:
if (dir->flags & DIR_SHOW_IGNORED)
dir_add_name(dir, istate, path->buf, path->len);
else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
((dir->flags & DIR_COLLECT_IGNORED) &&
exclude_matches_pathspec(path->buf, path->len,
pathspec)))
dir_add_ignored(dir, istate, path->buf, path->len);
break;
case path_untracked:
if (dir->flags & DIR_SHOW_IGNORED)
break;
dir_add_name(dir, istate, path->buf, path->len);
if (cdir->fdir)
add_untracked(untracked, path->buf + baselen);
break;
default:
break;
}
}
/*
* Read a directory tree. We currently ignore anything but
* directories, regular files and symlinks. That's because git
* doesn't handle them at all yet. Maybe that will change some
* day.
*
* Also, we ignore the name ".git" (even if it is not a directory).
* That likely will not change.
*
* If 'stop_at_first_file' is specified, 'path_excluded' is returned
* to signal that a file was found. This is the least significant value that
* indicates that a file was encountered that does not depend on the order of
* whether an untracked or excluded path was encountered first.
*
* Returns the most significant path_treatment value encountered in the scan.
* If 'stop_at_first_file' is specified, `path_excluded` is the most
* significant path_treatment value that will be returned.
*/
static enum path_treatment read_directory_recursive(struct dir_struct *dir,
struct index_state *istate, const char *base, int baselen,
struct untracked_cache_dir *untracked, int check_only,
int stop_at_first_file, const struct pathspec *pathspec)
{
/*
* WARNING: Do NOT recurse unless path_recurse is returned from
* treat_path(). Recursing on any other return value
* can result in exponential slowdown.
*/
struct cached_dir cdir;
enum path_treatment state, subdir_state, dir_state = path_none;
struct strbuf path = STRBUF_INIT;
strbuf_add(&path, base, baselen);
if (open_cached_dir(&cdir, dir, untracked, istate, &path, check_only))
goto out;
dir->visited_directories++;
if (untracked)
untracked->check_only = !!check_only;
while (!read_cached_dir(&cdir)) {
/* check how the file or directory should be treated */
state = treat_path(dir, untracked, &cdir, istate, &path,
baselen, pathspec);
dir->visited_paths++;
if (state > dir_state)
dir_state = state;
/* recurse into subdir if instructed by treat_path */
if (state == path_recurse) {
struct untracked_cache_dir *ud;
ud = lookup_untracked(dir->untracked, untracked,
path.buf + baselen,
path.len - baselen);
subdir_state =
read_directory_recursive(dir, istate, path.buf,
path.len, ud,
check_only, stop_at_first_file, pathspec);
if (subdir_state > dir_state)
dir_state = subdir_state;
if (pathspec &&
!match_pathspec(istate, pathspec, path.buf, path.len,
0 /* prefix */, NULL,
0 /* do NOT special case dirs */))
state = path_none;
}
if (check_only) {
if (stop_at_first_file) {
/*
* If stopping at first file, then
* signal that a file was found by
* returning `path_excluded`. This is
* to return a consistent value
* regardless of whether an ignored or
* excluded file happened to be
* encountered 1st.
*
* In current usage, the
* `stop_at_first_file` is passed when
* an ancestor directory has matched
* an exclude pattern, so any found
* files will be excluded.
*/
if (dir_state >= path_excluded) {
dir_state = path_excluded;
break;
}
}
/* abort early if maximum state has been reached */
if (dir_state == path_untracked) {
if (cdir.fdir)
add_untracked(untracked, path.buf + baselen);
break;
}
/* skip the add_path_to_appropriate_result_list() */
continue;
}
add_path_to_appropriate_result_list(dir, untracked, &cdir,
istate, &path, baselen,
pathspec, state);
}
close_cached_dir(&cdir);
out:
strbuf_release(&path);
return dir_state;
}
int cmp_dir_entry(const void *p1, const void *p2)
{
const struct dir_entry *e1 = *(const struct dir_entry **)p1;
const struct dir_entry *e2 = *(const struct dir_entry **)p2;
return name_compare(e1->name, e1->len, e2->name, e2->len);
}
/* check if *out lexically strictly contains *in */
int check_dir_entry_contains(const struct dir_entry *out, const struct dir_entry *in)
{
return (out->len < in->len) &&
(out->name[out->len - 1] == '/') &&
!memcmp(out->name, in->name, out->len);
}
static int treat_leading_path(struct dir_struct *dir,
struct index_state *istate,
const char *path, int len,
const struct pathspec *pathspec)
{
struct strbuf sb = STRBUF_INIT;
struct strbuf subdir = STRBUF_INIT;
int prevlen, baselen;
const char *cp;
struct cached_dir cdir;
enum path_treatment state = path_none;
/*
* For each directory component of path, we are going to check whether
* that path is relevant given the pathspec. For example, if path is
* foo/bar/baz/
* then we will ask treat_path() whether we should go into foo, then
* whether we should go into bar, then whether baz is relevant.
* Checking each is important because e.g. if path is
* .git/info/
* then we need to check .git to know we shouldn't traverse it.
* If the return from treat_path() is:
* * path_none, for any path, we return false.
* * path_recurse, for all path components, we return true
* * <anything else> for some intermediate component, we make sure
* to add that path to the relevant list but return false
* signifying that we shouldn't recurse into it.
*/
while (len && path[len - 1] == '/')
len--;
if (!len)
return 1;
memset(&cdir, 0, sizeof(cdir));
cdir.d_type = DT_DIR;
baselen = 0;
prevlen = 0;
while (1) {
prevlen = baselen + !!baselen;
cp = path + prevlen;
cp = memchr(cp, '/', path + len - cp);
if (!cp)
baselen = len;
else
baselen = cp - path;
strbuf_reset(&sb);
strbuf_add(&sb, path, baselen);
if (!is_directory(sb.buf))
break;
strbuf_reset(&sb);
strbuf_add(&sb, path, prevlen);
strbuf_reset(&subdir);
strbuf_add(&subdir, path+prevlen, baselen-prevlen);
cdir.d_name = subdir.buf;
state = treat_path(dir, NULL, &cdir, istate, &sb, prevlen, pathspec);
if (state != path_recurse)
break; /* do not recurse into it */
if (len <= baselen)
break; /* finished checking */
}
add_path_to_appropriate_result_list(dir, NULL, &cdir, istate,
&sb, baselen, pathspec,
state);
strbuf_release(&subdir);
strbuf_release(&sb);
return state == path_recurse;
}
static const char *get_ident_string(void)
{
static struct strbuf sb = STRBUF_INIT;
struct utsname uts;
if (sb.len)
return sb.buf;
if (uname(&uts) < 0)
die_errno(_("failed to get kernel name and information"));
strbuf_addf(&sb, "Location %s, system %s", get_git_work_tree(),
uts.sysname);
return sb.buf;
}
static int ident_in_untracked(const struct untracked_cache *uc)
{
/*
* Previous git versions may have saved many NUL separated
* strings in the "ident" field, but it is insane to manage
* many locations, so just take care of the first one.
*/
return !strcmp(uc->ident.buf, get_ident_string());
}
static void set_untracked_ident(struct untracked_cache *uc)
{
strbuf_reset(&uc->ident);
strbuf_addstr(&uc->ident, get_ident_string());
/*
* This strbuf used to contain a list of NUL separated
* strings, so save NUL too for backward compatibility.
*/
strbuf_addch(&uc->ident, 0);
}
static unsigned new_untracked_cache_flags(struct index_state *istate)
{
struct repository *repo = istate->repo;
char *val;
/*
* This logic is coordinated with the setting of these flags in
* wt-status.c#wt_status_collect_untracked(), and the evaluation
* of the config setting in commit.c#git_status_config()
*/
if (!repo_config_get_string(repo, "status.showuntrackedfiles", &val) &&
!strcmp(val, "all"))
return 0;
/*
* The default, if "all" is not set, is "normal" - leading us here.
* If the value is "none" then it really doesn't matter.
*/
return DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
}
static void new_untracked_cache(struct index_state *istate, int flags)
{
struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
strbuf_init(&uc->ident, 100);
uc->exclude_per_dir = ".gitignore";
uc->dir_flags = flags >= 0 ? flags : new_untracked_cache_flags(istate);
set_untracked_ident(uc);
istate->untracked = uc;
istate->cache_changed |= UNTRACKED_CHANGED;
}
void add_untracked_cache(struct index_state *istate)
{
if (!istate->untracked) {
new_untracked_cache(istate, -1);
} else {
if (!ident_in_untracked(istate->untracked)) {
free_untracked_cache(istate->untracked);
new_untracked_cache(istate, -1);
}
}
}
void remove_untracked_cache(struct index_state *istate)
{
if (istate->untracked) {
free_untracked_cache(istate->untracked);
istate->untracked = NULL;
istate->cache_changed |= UNTRACKED_CHANGED;
}
}
static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *dir,
int base_len,
const struct pathspec *pathspec,
struct index_state *istate)
{
struct untracked_cache_dir *root;
static int untracked_cache_disabled = -1;
if (!dir->untracked)
return NULL;
if (untracked_cache_disabled < 0)
untracked_cache_disabled = git_env_bool("GIT_DISABLE_UNTRACKED_CACHE", 0);
if (untracked_cache_disabled)
return NULL;
/*
* We only support $GIT_DIR/info/exclude and core.excludesfile
* as the global ignore rule files. Any other additions
* (e.g. from command line) invalidate the cache. This
* condition also catches running setup_standard_excludes()
* before setting dir->untracked!
*/
if (dir->unmanaged_exclude_files)
return NULL;
/*
* Optimize for the main use case only: whole-tree git
* status. More work involved in treat_leading_path() if we
* use cache on just a subset of the worktree. pathspec
* support could make the matter even worse.
*/
if (base_len || (pathspec && pathspec->nr))
return NULL;
/* We don't support collecting ignore files */
if (dir->flags & (DIR_SHOW_IGNORED | DIR_SHOW_IGNORED_TOO |
DIR_COLLECT_IGNORED))
return NULL;
/*
* If we use .gitignore in the cache and now you change it to
* .gitexclude, everything will go wrong.
*/
if (dir->exclude_per_dir != dir->untracked->exclude_per_dir &&
strcmp(dir->exclude_per_dir, dir->untracked->exclude_per_dir))
return NULL;
/*
* EXC_CMDL is not considered in the cache. If people set it,
* skip the cache.
*/
if (dir->exclude_list_group[EXC_CMDL].nr)
return NULL;
if (!ident_in_untracked(dir->untracked)) {
warning(_("untracked cache is disabled on this system or location"));
return NULL;
}
/*
* If the untracked structure we received does not have the same flags
* as requested in this run, we're going to need to either discard the
* existing structure (and potentially later recreate), or bypass the
* untracked cache mechanism for this run.
*/
if (dir->flags != dir->untracked->dir_flags) {
/*
* If the untracked structure we received does not have the same flags
* as configured, then we need to reset / create a new "untracked"
* structure to match the new config.
*
* Keeping the saved and used untracked cache consistent with the
* configuration provides an opportunity for frequent users of
* "git status -uall" to leverage the untracked cache by aligning their
* configuration - setting "status.showuntrackedfiles" to "all" or
* "normal" as appropriate.
*
* Previously using -uall (or setting "status.showuntrackedfiles" to
* "all") was incompatible with untracked cache and *consistently*
* caused surprisingly bad performance (with fscache and fsmonitor
* enabled) on Windows.
*
* IMPROVEMENT OPPORTUNITY: If we reworked the untracked cache storage
* to not be as bound up with the desired output in a given run,
* and instead iterated through and stored enough information to
* correctly serve both "modes", then users could get peak performance
* with or without '-uall' regardless of their
* "status.showuntrackedfiles" config.
*/
if (dir->untracked->dir_flags != new_untracked_cache_flags(istate)) {
free_untracked_cache(istate->untracked);
new_untracked_cache(istate, dir->flags);
dir->untracked = istate->untracked;
}
else {
/*
* Current untracked cache data is consistent with config, but not
* usable in this request/run; just bypass untracked cache.
*/
return NULL;
}
}
if (!dir->untracked->root) {
/* Untracked cache existed but is not initialized; fix that */
FLEX_ALLOC_STR(dir->untracked->root, name, "");
istate->cache_changed |= UNTRACKED_CHANGED;
}
/* Validate $GIT_DIR/info/exclude and core.excludesfile */
root = dir->untracked->root;
if (!oideq(&dir->ss_info_exclude.oid,
&dir->untracked->ss_info_exclude.oid)) {
invalidate_gitignore(dir->untracked, root);
dir->untracked->ss_info_exclude = dir->ss_info_exclude;
}
if (!oideq(&dir->ss_excludes_file.oid,
&dir->untracked->ss_excludes_file.oid)) {
invalidate_gitignore(dir->untracked, root);
dir->untracked->ss_excludes_file = dir->ss_excludes_file;
}
/* Make sure this directory is not dropped out at saving phase */
root->recurse = 1;
return root;
}
static void emit_traversal_statistics(struct dir_struct *dir,
struct repository *repo,
const char *path,
int path_len)
{
if (!trace2_is_enabled())
return;
if (!path_len) {
trace2_data_string("read_directory", repo, "path", "");
} else {
struct strbuf tmp = STRBUF_INIT;
strbuf_add(&tmp, path, path_len);
trace2_data_string("read_directory", repo, "path", tmp.buf);
strbuf_release(&tmp);
}
trace2_data_intmax("read_directory", repo,
"directories-visited", dir->visited_directories);
trace2_data_intmax("read_directory", repo,
"paths-visited", dir->visited_paths);
if (!dir->untracked)
return;
trace2_data_intmax("read_directory", repo,
"node-creation", dir->untracked->dir_created);
trace2_data_intmax("read_directory", repo,
"gitignore-invalidation",
dir->untracked->gitignore_invalidated);
trace2_data_intmax("read_directory", repo,
"directory-invalidation",
dir->untracked->dir_invalidated);
trace2_data_intmax("read_directory", repo,
"opendir", dir->untracked->dir_opened);
}
int read_directory(struct dir_struct *dir, struct index_state *istate,
const char *path, int len, const struct pathspec *pathspec)
{
struct untracked_cache_dir *untracked;
trace2_region_enter("dir", "read_directory", istate->repo);
dir->visited_paths = 0;
dir->visited_directories = 0;
if (has_symlink_leading_path(path, len)) {
trace2_region_leave("dir", "read_directory", istate->repo);
return dir->nr;
}
untracked = validate_untracked_cache(dir, len, pathspec, istate);
if (!untracked)
/*
* make sure untracked cache code path is disabled,
* e.g. prep_exclude()
*/
dir->untracked = NULL;
if (!len || treat_leading_path(dir, istate, path, len, pathspec))
read_directory_recursive(dir, istate, path, len, untracked, 0, 0, pathspec);
QSORT(dir->entries, dir->nr, cmp_dir_entry);
QSORT(dir->ignored, dir->ignored_nr, cmp_dir_entry);
emit_traversal_statistics(dir, istate->repo, path, len);
trace2_region_leave("dir", "read_directory", istate->repo);
if (dir->untracked) {
static int force_untracked_cache = -1;
if (force_untracked_cache < 0)
force_untracked_cache =
git_env_bool("GIT_FORCE_UNTRACKED_CACHE", -1);
if (force_untracked_cache < 0)
force_untracked_cache = (istate->repo->settings.core_untracked_cache == UNTRACKED_CACHE_WRITE);
if (force_untracked_cache &&
dir->untracked == istate->untracked &&
(dir->untracked->dir_opened ||
dir->untracked->gitignore_invalidated ||
dir->untracked->dir_invalidated))
istate->cache_changed |= UNTRACKED_CHANGED;
if (dir->untracked != istate->untracked) {
FREE_AND_NULL(dir->untracked);
}
}
return dir->nr;
}
int file_exists(const char *f)
{
struct stat sb;
return lstat(f, &sb) == 0;
}
int repo_file_exists(struct repository *repo, const char *path)
{
if (repo != the_repository)
BUG("do not know how to check file existence in arbitrary repo");
return file_exists(path);
}
static int cmp_icase(char a, char b)
{
if (a == b)
return 0;
if (ignore_case)
return toupper(a) - toupper(b);
return a - b;
}
/*
* Given two normalized paths (a trailing slash is ok), if subdir is
* outside dir, return -1. Otherwise return the offset in subdir that
* can be used as relative path to dir.
*/
int dir_inside_of(const char *subdir, const char *dir)
{
int offset = 0;
assert(dir && subdir && *dir && *subdir);
while (*dir && *subdir && !cmp_icase(*dir, *subdir)) {
dir++;
subdir++;
offset++;
}
/* hel[p]/me vs hel[l]/yeah */
if (*dir && *subdir)
return -1;
if (!*subdir)
return !*dir ? offset : -1; /* same dir */
/* foo/[b]ar vs foo/[] */
if (is_dir_sep(dir[-1]))
return is_dir_sep(subdir[-1]) ? offset : -1;
/* foo[/]bar vs foo[] */
return is_dir_sep(*subdir) ? offset + 1 : -1;
}
int is_inside_dir(const char *dir)
{
char *cwd;
int rc;
if (!dir)
return 0;
cwd = xgetcwd();
rc = (dir_inside_of(cwd, dir) >= 0);
free(cwd);
return rc;
}
int is_empty_dir(const char *path)
{
DIR *dir = opendir(path);
struct dirent *e;
int ret = 1;
if (!dir)
return 0;
e = readdir_skip_dot_and_dotdot(dir);
if (e)
ret = 0;
closedir(dir);
return ret;
}
char *git_url_basename(const char *repo, int is_bundle, int is_bare)
{
const char *end = repo + strlen(repo), *start, *ptr;
size_t len;
char *dir;
/*
* Skip scheme.
*/
start = strstr(repo, "://");
if (!start)
start = repo;
else
start += 3;
/*
* Skip authentication data. The stripping does happen
* greedily, such that we strip up to the last '@' inside
* the host part.
*/
for (ptr = start; ptr < end && !is_dir_sep(*ptr); ptr++) {
if (*ptr == '@')
start = ptr + 1;
}
/*
* Strip trailing spaces, slashes and /.git
*/
while (start < end && (is_dir_sep(end[-1]) || isspace(end[-1])))
end--;
if (end - start > 5 && is_dir_sep(end[-5]) &&
!strncmp(end - 4, ".git", 4)) {
end -= 5;
while (start < end && is_dir_sep(end[-1]))
end--;
}
/*
* It should not be possible to overflow `ptrdiff_t` by passing in an
* insanely long URL, but GCC does not know that and will complain
* without this check.
*/
if (end - start < 0)
die(_("No directory name could be guessed.\n"
"Please specify a directory on the command line"));
/*
* Strip trailing port number if we've got only a
* hostname (that is, there is no dir separator but a
* colon). This check is required such that we do not
* strip URI's like '/foo/bar:2222.git', which should
* result in a dir '2222' being guessed due to backwards
* compatibility.
*/
if (memchr(start, '/', end - start) == NULL
&& memchr(start, ':', end - start) != NULL) {
ptr = end;
while (start < ptr && isdigit(ptr[-1]) && ptr[-1] != ':')
ptr--;
if (start < ptr && ptr[-1] == ':')
end = ptr - 1;
}
/*
* Find last component. To remain backwards compatible we
* also regard colons as path separators, such that
* cloning a repository 'foo:bar.git' would result in a
* directory 'bar' being guessed.
*/
ptr = end;
while (start < ptr && !is_dir_sep(ptr[-1]) && ptr[-1] != ':')
ptr--;
start = ptr;
/*
* Strip .{bundle,git}.
*/
len = end - start;
strip_suffix_mem(start, &len, is_bundle ? ".bundle" : ".git");
if (!len || (len == 1 && *start == '/'))
die(_("No directory name could be guessed.\n"
"Please specify a directory on the command line"));
if (is_bare)
dir = xstrfmt("%.*s.git", (int)len, start);
else
dir = xstrndup(start, len);
/*
* Replace sequences of 'control' characters and whitespace
* with one ascii space, remove leading and trailing spaces.
*/
if (*dir) {
char *out = dir;
int prev_space = 1 /* strip leading whitespace */;
for (end = dir; *end; ++end) {
char ch = *end;
if ((unsigned char)ch < '\x20')
ch = '\x20';
if (isspace(ch)) {
if (prev_space)
continue;
prev_space = 1;
} else
prev_space = 0;
*out++ = ch;
}
*out = '\0';
if (out > dir && prev_space)
out[-1] = '\0';
}
return dir;
}
void strip_dir_trailing_slashes(char *dir)
{
char *end = dir + strlen(dir);
while (dir < end - 1 && is_dir_sep(end[-1]))
end--;
*end = '\0';
}
static int remove_dir_recurse(struct strbuf *path, int flag, int *kept_up)
{
DIR *dir;
struct dirent *e;
int ret = 0, original_len = path->len, len, kept_down = 0;
int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
int keep_toplevel = (flag & REMOVE_DIR_KEEP_TOPLEVEL);
int purge_original_cwd = (flag & REMOVE_DIR_PURGE_ORIGINAL_CWD);
struct object_id submodule_head;
if ((flag & REMOVE_DIR_KEEP_NESTED_GIT) &&
!resolve_gitlink_ref(path->buf, "HEAD", &submodule_head)) {
/* Do not descend and nuke a nested git work tree. */
if (kept_up)
*kept_up = 1;
return 0;
}
flag &= ~REMOVE_DIR_KEEP_TOPLEVEL;
dir = opendir(path->buf);
if (!dir) {
if (errno == ENOENT)
return keep_toplevel ? -1 : 0;
else if (errno == EACCES && !keep_toplevel)
/*
* An empty dir could be removable even if it
* is unreadable:
*/
return rmdir(path->buf);
else
return -1;
}
strbuf_complete(path, '/');
len = path->len;
while ((e = readdir_skip_dot_and_dotdot(dir)) != NULL) {
struct stat st;
strbuf_setlen(path, len);
strbuf_addstr(path, e->d_name);
if (lstat(path->buf, &st)) {
if (errno == ENOENT)
/*
* file disappeared, which is what we
* wanted anyway
*/
continue;
/* fall through */
} else if (S_ISDIR(st.st_mode)) {
if (!remove_dir_recurse(path, flag, &kept_down))
continue; /* happy */
} else if (!only_empty &&
(!unlink(path->buf) || errno == ENOENT)) {
continue; /* happy, too */
}
/* path too long, stat fails, or non-directory still exists */
ret = -1;
break;
}
closedir(dir);
strbuf_setlen(path, original_len);
if (!ret && !keep_toplevel && !kept_down) {
if (!purge_original_cwd &&
startup_info->original_cwd &&
!strcmp(startup_info->original_cwd, path->buf))
ret = -1; /* Do not remove current working directory */
else
ret = (!rmdir(path->buf) || errno == ENOENT) ? 0 : -1;
} else if (kept_up)
/*
* report the uplevel that it is not an error that we
* did not rmdir() our directory.
*/
*kept_up = !ret;
return ret;
}
int remove_dir_recursively(struct strbuf *path, int flag)
{
return remove_dir_recurse(path, flag, NULL);
}
static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
void setup_standard_excludes(struct dir_struct *dir)
{
dir->exclude_per_dir = ".gitignore";
/* core.excludesfile defaulting to $XDG_CONFIG_HOME/git/ignore */
if (!excludes_file)
excludes_file = xdg_config_home("ignore");
if (excludes_file && !access_or_warn(excludes_file, R_OK, 0))
add_patterns_from_file_1(dir, excludes_file,
dir->untracked ? &dir->ss_excludes_file : NULL);
/* per repository user preference */
if (startup_info->have_repository) {
const char *path = git_path_info_exclude();
if (!access_or_warn(path, R_OK, 0))
add_patterns_from_file_1(dir, path,
dir->untracked ? &dir->ss_info_exclude : NULL);
}
}
char *get_sparse_checkout_filename(void)
{
return git_pathdup("info/sparse-checkout");
}
int get_sparse_checkout_patterns(struct pattern_list *pl)
{
int res;
char *sparse_filename = get_sparse_checkout_filename();
pl->use_cone_patterns = core_sparse_checkout_cone;
res = add_patterns_from_file_to_list(sparse_filename, "", 0, pl, NULL, 0);
free(sparse_filename);
return res;
}
int remove_path(const char *name)
{
char *slash;
if (unlink(name) && !is_missing_file_error(errno))
return -1;
slash = strrchr(name, '/');
if (slash) {
char *dirs = xstrdup(name);
slash = dirs + (slash - name);
do {
*slash = '\0';
if (startup_info->original_cwd &&
!strcmp(startup_info->original_cwd, dirs))
break;
} while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
free(dirs);
}
return 0;
}
/*
* Frees memory within dir which was allocated, and resets fields for further
* use. Does not free dir itself.
*/
void dir_clear(struct dir_struct *dir)
{
int i, j;
struct exclude_list_group *group;
struct pattern_list *pl;
struct exclude_stack *stk;
struct dir_struct new = DIR_INIT;
for (i = EXC_CMDL; i <= EXC_FILE; i++) {
group = &dir->exclude_list_group[i];
for (j = 0; j < group->nr; j++) {
pl = &group->pl[j];
if (i == EXC_DIRS)
free((char *)pl->src);
clear_pattern_list(pl);
}
free(group->pl);
}
for (i = 0; i < dir->ignored_nr; i++)
free(dir->ignored[i]);
for (i = 0; i < dir->nr; i++)
free(dir->entries[i]);
free(dir->ignored);
free(dir->entries);
stk = dir->exclude_stack;
while (stk) {
struct exclude_stack *prev = stk->prev;
free(stk);
stk = prev;
}
strbuf_release(&dir->basebuf);
memcpy(dir, &new, sizeof(*dir));
}
struct ondisk_untracked_cache {
struct stat_data info_exclude_stat;
struct stat_data excludes_file_stat;
uint32_t dir_flags;
};
#define ouc_offset(x) offsetof(struct ondisk_untracked_cache, x)
struct write_data {
int index; /* number of written untracked_cache_dir */
struct ewah_bitmap *check_only; /* from untracked_cache_dir */
struct ewah_bitmap *valid; /* from untracked_cache_dir */
struct ewah_bitmap *sha1_valid; /* set if exclude_sha1 is not null */
struct strbuf out;
struct strbuf sb_stat;
struct strbuf sb_sha1;
};
static void stat_data_to_disk(struct stat_data *to, const struct stat_data *from)
{
to->sd_ctime.sec = htonl(from->sd_ctime.sec);
to->sd_ctime.nsec = htonl(from->sd_ctime.nsec);
to->sd_mtime.sec = htonl(from->sd_mtime.sec);
to->sd_mtime.nsec = htonl(from->sd_mtime.nsec);
to->sd_dev = htonl(from->sd_dev);
to->sd_ino = htonl(from->sd_ino);
to->sd_uid = htonl(from->sd_uid);
to->sd_gid = htonl(from->sd_gid);
to->sd_size = htonl(from->sd_size);
}
static void write_one_dir(struct untracked_cache_dir *untracked,
struct write_data *wd)
{
struct stat_data stat_data;
struct strbuf *out = &wd->out;
unsigned char intbuf[16];
unsigned int intlen, value;
int i = wd->index++;
/*
* untracked_nr should be reset whenever valid is clear, but
* for safety..
*/
if (!untracked->valid) {
untracked->untracked_nr = 0;
untracked->check_only = 0;
}
if (untracked->check_only)
ewah_set(wd->check_only, i);
if (untracked->valid) {
ewah_set(wd->valid, i);
stat_data_to_disk(&stat_data, &untracked->stat_data);
strbuf_add(&wd->sb_stat, &stat_data, sizeof(stat_data));
}
if (!is_null_oid(&untracked->exclude_oid)) {
ewah_set(wd->sha1_valid, i);
strbuf_add(&wd->sb_sha1, untracked->exclude_oid.hash,
the_hash_algo->rawsz);
}
intlen = encode_varint(untracked->untracked_nr, intbuf);
strbuf_add(out, intbuf, intlen);
/* skip non-recurse directories */
for (i = 0, value = 0; i < untracked->dirs_nr; i++)
if (untracked->dirs[i]->recurse)
value++;
intlen = encode_varint(value, intbuf);
strbuf_add(out, intbuf, intlen);
strbuf_add(out, untracked->name, strlen(untracked->name) + 1);
for (i = 0; i < untracked->untracked_nr; i++)
strbuf_add(out, untracked->untracked[i],
strlen(untracked->untracked[i]) + 1);
for (i = 0; i < untracked->dirs_nr; i++)
if (untracked->dirs[i]->recurse)
write_one_dir(untracked->dirs[i], wd);
}
void write_untracked_extension(struct strbuf *out, struct untracked_cache *untracked)
{
struct ondisk_untracked_cache *ouc;
struct write_data wd;
unsigned char varbuf[16];
int varint_len;
const unsigned hashsz = the_hash_algo->rawsz;
CALLOC_ARRAY(ouc, 1);
stat_data_to_disk(&ouc->info_exclude_stat, &untracked->ss_info_exclude.stat);
stat_data_to_disk(&ouc->excludes_file_stat, &untracked->ss_excludes_file.stat);
ouc->dir_flags = htonl(untracked->dir_flags);
varint_len = encode_varint(untracked->ident.len, varbuf);
strbuf_add(out, varbuf, varint_len);
strbuf_addbuf(out, &untracked->ident);
strbuf_add(out, ouc, sizeof(*ouc));
strbuf_add(out, untracked->ss_info_exclude.oid.hash, hashsz);
strbuf_add(out, untracked->ss_excludes_file.oid.hash, hashsz);
strbuf_add(out, untracked->exclude_per_dir, strlen(untracked->exclude_per_dir) + 1);
FREE_AND_NULL(ouc);
if (!untracked->root) {
varint_len = encode_varint(0, varbuf);
strbuf_add(out, varbuf, varint_len);
return;
}
wd.index = 0;
wd.check_only = ewah_new();
wd.valid = ewah_new();
wd.sha1_valid = ewah_new();
strbuf_init(&wd.out, 1024);
strbuf_init(&wd.sb_stat, 1024);
strbuf_init(&wd.sb_sha1, 1024);
write_one_dir(untracked->root, &wd);
varint_len = encode_varint(wd.index, varbuf);
strbuf_add(out, varbuf, varint_len);
strbuf_addbuf(out, &wd.out);
ewah_serialize_strbuf(wd.valid, out);
ewah_serialize_strbuf(wd.check_only, out);
ewah_serialize_strbuf(wd.sha1_valid, out);
strbuf_addbuf(out, &wd.sb_stat);
strbuf_addbuf(out, &wd.sb_sha1);
strbuf_addch(out, '\0'); /* safe guard for string lists */
ewah_free(wd.valid);
ewah_free(wd.check_only);
ewah_free(wd.sha1_valid);
strbuf_release(&wd.out);
strbuf_release(&wd.sb_stat);
strbuf_release(&wd.sb_sha1);
}
static void free_untracked(struct untracked_cache_dir *ucd)
{
int i;
if (!ucd)
return;
for (i = 0; i < ucd->dirs_nr; i++)
free_untracked(ucd->dirs[i]);
for (i = 0; i < ucd->untracked_nr; i++)
free(ucd->untracked[i]);
free(ucd->untracked);
free(ucd->dirs);
free(ucd);
}
void free_untracked_cache(struct untracked_cache *uc)
{
if (!uc)
return;
free(uc->exclude_per_dir_to_free);
strbuf_release(&uc->ident);
free_untracked(uc->root);
free(uc);
}
struct read_data {
int index;
struct untracked_cache_dir **ucd;
struct ewah_bitmap *check_only;
struct ewah_bitmap *valid;
struct ewah_bitmap *sha1_valid;
const unsigned char *data;
const unsigned char *end;
};
static void stat_data_from_disk(struct stat_data *to, const unsigned char *data)
{
memcpy(to, data, sizeof(*to));
to->sd_ctime.sec = ntohl(to->sd_ctime.sec);
to->sd_ctime.nsec = ntohl(to->sd_ctime.nsec);
to->sd_mtime.sec = ntohl(to->sd_mtime.sec);
to->sd_mtime.nsec = ntohl(to->sd_mtime.nsec);
to->sd_dev = ntohl(to->sd_dev);
to->sd_ino = ntohl(to->sd_ino);
to->sd_uid = ntohl(to->sd_uid);
to->sd_gid = ntohl(to->sd_gid);
to->sd_size = ntohl(to->sd_size);
}
static int read_one_dir(struct untracked_cache_dir **untracked_,
struct read_data *rd)
{
struct untracked_cache_dir ud, *untracked;
const unsigned char *data = rd->data, *end = rd->end;
const unsigned char *eos;
unsigned int value;
int i;
memset(&ud, 0, sizeof(ud));
value = decode_varint(&data);
if (data > end)
return -1;
ud.recurse = 1;
ud.untracked_alloc = value;
ud.untracked_nr = value;
if (ud.untracked_nr)
ALLOC_ARRAY(ud.untracked, ud.untracked_nr);
ud.dirs_alloc = ud.dirs_nr = decode_varint(&data);
if (data > end)
return -1;
ALLOC_ARRAY(ud.dirs, ud.dirs_nr);
eos = memchr(data, '\0', end - data);
if (!eos || eos == end)
return -1;
*untracked_ = untracked = xmalloc(st_add3(sizeof(*untracked), eos - data, 1));
memcpy(untracked, &ud, sizeof(ud));
memcpy(untracked->name, data, eos - data + 1);
data = eos + 1;
for (i = 0; i < untracked->untracked_nr; i++) {
eos = memchr(data, '\0', end - data);
if (!eos || eos == end)
return -1;
untracked->untracked[i] = xmemdupz(data, eos - data);
data = eos + 1;
}
rd->ucd[rd->index++] = untracked;
rd->data = data;
for (i = 0; i < untracked->dirs_nr; i++) {
if (read_one_dir(untracked->dirs + i, rd) < 0)
return -1;
}
return 0;
}
static void set_check_only(size_t pos, void *cb)
{
struct read_data *rd = cb;
struct untracked_cache_dir *ud = rd->ucd[pos];
ud->check_only = 1;
}
static void read_stat(size_t pos, void *cb)
{
struct read_data *rd = cb;
struct untracked_cache_dir *ud = rd->ucd[pos];
if (rd->data + sizeof(struct stat_data) > rd->end) {
rd->data = rd->end + 1;
return;
}
stat_data_from_disk(&ud->stat_data, rd->data);
rd->data += sizeof(struct stat_data);
ud->valid = 1;
}
static void read_oid(size_t pos, void *cb)
{
struct read_data *rd = cb;
struct untracked_cache_dir *ud = rd->ucd[pos];
if (rd->data + the_hash_algo->rawsz > rd->end) {
rd->data = rd->end + 1;
return;
}
oidread(&ud->exclude_oid, rd->data);
rd->data += the_hash_algo->rawsz;
}
static void load_oid_stat(struct oid_stat *oid_stat, const unsigned char *data,
const unsigned char *sha1)
{
stat_data_from_disk(&oid_stat->stat, data);
oidread(&oid_stat->oid, sha1);
oid_stat->valid = 1;
}
struct untracked_cache *read_untracked_extension(const void *data, unsigned long sz)
{
struct untracked_cache *uc;
struct read_data rd;
const unsigned char *next = data, *end = (const unsigned char *)data + sz;
const char *ident;
int ident_len;
ssize_t len;
const char *exclude_per_dir;
const unsigned hashsz = the_hash_algo->rawsz;
const unsigned offset = sizeof(struct ondisk_untracked_cache);
const unsigned exclude_per_dir_offset = offset + 2 * hashsz;
if (sz <= 1 || end[-1] != '\0')
return NULL;
end--;
ident_len = decode_varint(&next);
if (next + ident_len > end)
return NULL;
ident = (const char *)next;
next += ident_len;
if (next + exclude_per_dir_offset + 1 > end)
return NULL;
CALLOC_ARRAY(uc, 1);
strbuf_init(&uc->ident, ident_len);
strbuf_add(&uc->ident, ident, ident_len);
load_oid_stat(&uc->ss_info_exclude,
next + ouc_offset(info_exclude_stat),
next + offset);
load_oid_stat(&uc->ss_excludes_file,
next + ouc_offset(excludes_file_stat),
next + offset + hashsz);
uc->dir_flags = get_be32(next + ouc_offset(dir_flags));
exclude_per_dir = (const char *)next + exclude_per_dir_offset;
uc->exclude_per_dir = uc->exclude_per_dir_to_free = xstrdup(exclude_per_dir);
/* NUL after exclude_per_dir is covered by sizeof(*ouc) */
next += exclude_per_dir_offset + strlen(exclude_per_dir) + 1;
if (next >= end)
goto done2;
len = decode_varint(&next);
if (next > end || len == 0)
goto done2;
rd.valid = ewah_new();
rd.check_only = ewah_new();
rd.sha1_valid = ewah_new();
rd.data = next;
rd.end = end;
rd.index = 0;
ALLOC_ARRAY(rd.ucd, len);
if (read_one_dir(&uc->root, &rd) || rd.index != len)
goto done;
next = rd.data;
len = ewah_read_mmap(rd.valid, next, end - next);
if (len < 0)
goto done;
next += len;
len = ewah_read_mmap(rd.check_only, next, end - next);
if (len < 0)
goto done;
next += len;
len = ewah_read_mmap(rd.sha1_valid, next, end - next);
if (len < 0)
goto done;
ewah_each_bit(rd.check_only, set_check_only, &rd);
rd.data = next + len;
ewah_each_bit(rd.valid, read_stat, &rd);
ewah_each_bit(rd.sha1_valid, read_oid, &rd);
next = rd.data;
done:
free(rd.ucd);
ewah_free(rd.valid);
ewah_free(rd.check_only);
ewah_free(rd.sha1_valid);
done2:
if (next != end) {
free_untracked_cache(uc);
uc = NULL;
}
return uc;
}
static void invalidate_one_directory(struct untracked_cache *uc,
struct untracked_cache_dir *ucd)
{
uc->dir_invalidated++;
ucd->valid = 0;
ucd->untracked_nr = 0;
}
/*
* Normally when an entry is added or removed from a directory,
* invalidating that directory is enough. No need to touch its
* ancestors. When a directory is shown as "foo/bar/" in git-status
* however, deleting or adding an entry may have cascading effect.
*
* Say the "foo/bar/file" has become untracked, we need to tell the
* untracked_cache_dir of "foo" that "bar/" is not an untracked
* directory any more (because "bar" is managed by foo as an untracked
* "file").
*
* Similarly, if "foo/bar/file" moves from untracked to tracked and it
* was the last untracked entry in the entire "foo", we should show
* "foo/" instead. Which means we have to invalidate past "bar" up to
* "foo".
*
* This function traverses all directories from root to leaf. If there
* is a chance of one of the above cases happening, we invalidate back
* to root. Otherwise we just invalidate the leaf. There may be a more
* sophisticated way than checking for SHOW_OTHER_DIRECTORIES to
* detect these cases and avoid unnecessary invalidation, for example,
* checking for the untracked entry named "bar/" in "foo", but for now
* stick to something safe and simple.
*/
static int invalidate_one_component(struct untracked_cache *uc,
struct untracked_cache_dir *dir,
const char *path, int len)
{
const char *rest = strchr(path, '/');
if (rest) {
int component_len = rest - path;
struct untracked_cache_dir *d =
lookup_untracked(uc, dir, path, component_len);
int ret =
invalidate_one_component(uc, d, rest + 1,
len - (component_len + 1));
if (ret)
invalidate_one_directory(uc, dir);
return ret;
}
invalidate_one_directory(uc, dir);
return uc->dir_flags & DIR_SHOW_OTHER_DIRECTORIES;
}
void untracked_cache_invalidate_path(struct index_state *istate,
const char *path, int safe_path)
{
if (!istate->untracked || !istate->untracked->root)
return;
if (!safe_path && !verify_path(path, 0))
return;
invalidate_one_component(istate->untracked, istate->untracked->root,
path, strlen(path));
}
void untracked_cache_remove_from_index(struct index_state *istate,
const char *path)
{
untracked_cache_invalidate_path(istate, path, 1);
}
void untracked_cache_add_to_index(struct index_state *istate,
const char *path)
{
untracked_cache_invalidate_path(istate, path, 1);
}
static void connect_wt_gitdir_in_nested(const char *sub_worktree,
const char *sub_gitdir)
{
int i;
struct repository subrepo;
struct strbuf sub_wt = STRBUF_INIT;
struct strbuf sub_gd = STRBUF_INIT;
const struct submodule *sub;
/* If the submodule has no working tree, we can ignore it. */
if (repo_init(&subrepo, sub_gitdir, sub_worktree))
return;
if (repo_read_index(&subrepo) < 0)
die(_("index file corrupt in repo %s"), subrepo.gitdir);
/* TODO: audit for interaction with sparse-index. */
ensure_full_index(subrepo.index);
for (i = 0; i < subrepo.index->cache_nr; i++) {
const struct cache_entry *ce = subrepo.index->cache[i];
if (!S_ISGITLINK(ce->ce_mode))
continue;
while (i + 1 < subrepo.index->cache_nr &&
!strcmp(ce->name, subrepo.index->cache[i + 1]->name))
/*
* Skip entries with the same name in different stages
* to make sure an entry is returned only once.
*/
i++;
sub = submodule_from_path(&subrepo, null_oid(), ce->name);
if (!sub || !is_submodule_active(&subrepo, ce->name))
/* .gitmodules broken or inactive sub */
continue;
strbuf_reset(&sub_wt);
strbuf_reset(&sub_gd);
strbuf_addf(&sub_wt, "%s/%s", sub_worktree, sub->path);
submodule_name_to_gitdir(&sub_gd, &subrepo, sub->name);
connect_work_tree_and_git_dir(sub_wt.buf, sub_gd.buf, 1);
}
strbuf_release(&sub_wt);
strbuf_release(&sub_gd);
repo_clear(&subrepo);
}
void connect_work_tree_and_git_dir(const char *work_tree_,
const char *git_dir_,
int recurse_into_nested)
{
struct strbuf gitfile_sb = STRBUF_INIT;
struct strbuf cfg_sb = STRBUF_INIT;
struct strbuf rel_path = STRBUF_INIT;
char *git_dir, *work_tree;
/* Prepare .git file */
strbuf_addf(&gitfile_sb, "%s/.git", work_tree_);
if (safe_create_leading_directories_const(gitfile_sb.buf))
die(_("could not create directories for %s"), gitfile_sb.buf);
/* Prepare config file */
strbuf_addf(&cfg_sb, "%s/config", git_dir_);
if (safe_create_leading_directories_const(cfg_sb.buf))
die(_("could not create directories for %s"), cfg_sb.buf);
git_dir = real_pathdup(git_dir_, 1);
work_tree = real_pathdup(work_tree_, 1);
/* Write .git file */
write_file(gitfile_sb.buf, "gitdir: %s",
relative_path(git_dir, work_tree, &rel_path));
/* Update core.worktree setting */
git_config_set_in_file(cfg_sb.buf, "core.worktree",
relative_path(work_tree, git_dir, &rel_path));
strbuf_release(&gitfile_sb);
strbuf_release(&cfg_sb);
strbuf_release(&rel_path);
if (recurse_into_nested)
connect_wt_gitdir_in_nested(work_tree, git_dir);
free(work_tree);
free(git_dir);
}
/*
* Migrate the git directory of the given path from old_git_dir to new_git_dir.
*/
void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)
{
if (rename(old_git_dir, new_git_dir) < 0)
die_errno(_("could not migrate git directory from '%s' to '%s'"),
old_git_dir, new_git_dir);
connect_work_tree_and_git_dir(path, new_git_dir, 0);
}
int path_match_flags(const char *const str, const enum path_match_flags flags)
{
const char *p = str;
if (flags & PATH_MATCH_NATIVE &&
flags & PATH_MATCH_XPLATFORM)
BUG("path_match_flags() must get one match kind, not multiple!");
else if (!(flags & PATH_MATCH_KINDS_MASK))
BUG("path_match_flags() must get at least one match kind!");
if (flags & PATH_MATCH_STARTS_WITH_DOT_SLASH &&
flags & PATH_MATCH_STARTS_WITH_DOT_DOT_SLASH)
BUG("path_match_flags() must get one platform kind, not multiple!");
else if (!(flags & PATH_MATCH_PLATFORM_MASK))
BUG("path_match_flags() must get at least one platform kind!");
if (*p++ != '.')
return 0;
if (flags & PATH_MATCH_STARTS_WITH_DOT_DOT_SLASH &&
*p++ != '.')
return 0;
if (flags & PATH_MATCH_NATIVE)
return is_dir_sep(*p);
else if (flags & PATH_MATCH_XPLATFORM)
return is_xplatform_dir_sep(*p);
BUG("unreachable");
}
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