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/*
* This handles recursive filename detection with exclude
* files, index knowledge etc..
*
* See Documentation/technical/api-directory-listing.txt
*
* Copyright (C) Linus Torvalds, 2005-2006
* Junio Hamano, 2005-2006
*/
#include "cache.h"
#include "dir.h"
#include "refs.h"
#include "wildmatch.h"
#include "pathspec.h"
#include "utf8.h"
#include "varint.h"
#include "ewah/ewok.h"
struct path_simplify {
int len;
const char *path;
};
/*
* 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;
struct dirent *de;
const char *file;
struct untracked_cache_dir *ucd;
};
static enum path_treatment read_directory_recursive(struct dir_struct *dir,
const char *path, int len, struct untracked_cache_dir *untracked,
int check_only, const struct path_simplify *simplify);
static int get_dtype(struct dirent *de, const char *path, int len);
int fspathcmp(const char *a, const char *b)
{
return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
}
int fspathncmp(const char *a, const char *b, size_t count)
{
return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
}
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),
NULL);
else
/* wildmatch has not learned no FNM_PATHNAME mode yet */
return wildmatch(pattern, string,
item->magic & PATHSPEC_ICASE ? WM_CASEFOLD : 0,
NULL);
}
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, NULL);
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 xuz/abc as
* in non-:(icase).
*/
GUARD_PATHSPEC(pathspec,
PATHSPEC_FROMTOP |
PATHSPEC_MAXDEPTH |
PATHSPEC_LITERAL |
PATHSPEC_GLOB |
PATHSPEC_ICASE |
PATHSPEC_EXCLUDE);
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, const struct pathspec *pathspec)
{
size_t len;
/*
* Calculate common prefix for the pathspec, and
* use that to optimize the directory walk
*/
len = common_prefix_len(pathspec);
/* Read the directory and prune it */
read_directory(dir, pathspec->nr ? pathspec->_raw[0] : "", len, pathspec);
return 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;
}
#define DO_MATCH_EXCLUDE (1<<0)
#define DO_MATCH_DIRECTORY (1<<1)
#define DO_MATCH_SUBMODULE (1<<2)
/*
* Does 'match' match the given name?
* A match is found if
*
* (1) the 'match' string is leading directory of 'name', or
* (2) the 'match' string is a wildcard and matches 'name', or
* (3) the 'match' string is exactly the same as 'name'.
*
* and the return value tells which case it was.
*
* It returns 0 when there is no match.
*/
static int match_pathspec_item(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 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 super set of the pathspec */
if (flags & DO_MATCH_SUBMODULE) {
/* name is a literal prefix of the pathspec */
if ((namelen < matchlen) &&
(match[namelen] == '/') &&
!ps_strncmp(item, match, name, namelen))
return MATCHED_RECURSIVELY;
/* 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;
/*
* 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;
}
return 0;
}
/*
* 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(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);
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(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;
}
int match_pathspec(const struct pathspec *ps,
const char *name, int namelen,
int prefix, char *seen, int is_dir)
{
int positive, negative;
unsigned flags = is_dir ? DO_MATCH_DIRECTORY : 0;
positive = do_match_pathspec(ps, name, namelen,
prefix, seen, flags);
if (!(ps->magic & PATHSPEC_EXCLUDE) || !positive)
return positive;
negative = do_match_pathspec(ps, name, namelen,
prefix, seen,
flags | DO_MATCH_EXCLUDE);
return negative ? 0 : positive;
}
/**
* Check if a submodule is a superset of the pathspec
*/
int submodule_path_match(const struct pathspec *ps,
const char *submodule_name,
char *seen)
{
int matched = do_match_pathspec(ps, submodule_name,
strlen(submodule_name),
0, seen,
DO_MATCH_DIRECTORY |
DO_MATCH_SUBMODULE);
return matched;
}
int report_path_error(const char *ps_matched,
const struct pathspec *pathspec,
const char *prefix)
{
/*
* 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_exclude_pattern(const char **pattern,
int *patternlen,
unsigned *flags,
int *nowildcardlen)
{
const char *p = *pattern;
size_t i, len;
*flags = 0;
if (*p == '!') {
*flags |= EXC_FLAG_NEGATIVE;
p++;
}
len = strlen(p);
if (len && p[len - 1] == '/') {
len--;
*flags |= EXC_FLAG_MUSTBEDIR;
}
for (i = 0; i < len; i++) {
if (p[i] == '/')
break;
}
if (i == len)
*flags |= EXC_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 |= EXC_FLAG_ENDSWITH;
*pattern = p;
*patternlen = len;
}
void add_exclude(const char *string, const char *base,
int baselen, struct exclude_list *el, int srcpos)
{
struct exclude *x;
int patternlen;
unsigned flags;
int nowildcardlen;
parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen);
if (flags & EXC_FLAG_MUSTBEDIR) {
FLEXPTR_ALLOC_MEM(x, pattern, string, patternlen);
} else {
x = xmalloc(sizeof(*x));
x->pattern = string;
}
x->patternlen = patternlen;
x->nowildcardlen = nowildcardlen;
x->base = base;
x->baselen = baselen;
x->flags = flags;
x->srcpos = srcpos;
ALLOC_GROW(el->excludes, el->nr + 1, el->alloc);
el->excludes[el->nr++] = x;
x->el = el;
}
static void *read_skip_worktree_file_from_index(const char *path, size_t *size,
struct sha1_stat *sha1_stat)
{
int pos, len;
unsigned long sz;
enum object_type type;
void *data;
len = strlen(path);
pos = cache_name_pos(path, len);
if (pos < 0)
return NULL;
if (!ce_skip_worktree(active_cache[pos]))
return NULL;
data = read_sha1_file(active_cache[pos]->oid.hash, &type, &sz);
if (!data || type != OBJ_BLOB) {
free(data);
return NULL;
}
*size = xsize_t(sz);
if (sha1_stat) {
memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
hashcpy(sha1_stat->sha1, active_cache[pos]->oid.hash);
}
return data;
}
/*
* Frees memory within el which was allocated for exclude patterns and
* the file buffer. Does not free el itself.
*/
void clear_exclude_list(struct exclude_list *el)
{
int i;
for (i = 0; i < el->nr; i++)
free(el->excludes[i]);
free(el->excludes);
free(el->filebuf);
memset(el, 0, sizeof(*el));
}
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 = (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);
memmove(dir->dirs + first + 1, dir->dirs + first,
(dir->dirs_nr - first) * sizeof(*dir->dirs));
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;
uc->dir_invalidated++;
dir->valid = 0;
dir->untracked_nr = 0;
for (i = 0; i < dir->dirs_nr; i++)
dir->dirs[i]->recurse = 0;
}
/*
* Given a file with name "fname", read it (either from disk, or from
* the index if "check_index" is non-zero), parse it and store the
* exclude rules in "el".
*
* If "ss" is not NULL, compute SHA-1 of the exclude file and fill
* stat data from disk (only valid if add_excludes returns zero). If
* ss_valid is non-zero, "ss" must contain good value as input.
*/
static int add_excludes(const char *fname, const char *base, int baselen,
struct exclude_list *el, int check_index,
struct sha1_stat *sha1_stat)
{
struct stat st;
int fd, i, lineno = 1;
size_t size = 0;
char *buf, *entry;
fd = open(fname, O_RDONLY);
if (fd < 0 || fstat(fd, &st) < 0) {
if (errno != ENOENT)
warn_on_inaccessible(fname);
if (0 <= fd)
close(fd);
if (!check_index ||
(buf = read_skip_worktree_file_from_index(fname, &size, sha1_stat)) == NULL)
return -1;
if (size == 0) {
free(buf);
return 0;
}
if (buf[size-1] != '\n') {
buf = xrealloc(buf, st_add(size, 1));
buf[size++] = '\n';
}
} else {
size = xsize_t(st.st_size);
if (size == 0) {
if (sha1_stat) {
fill_stat_data(&sha1_stat->stat, &st);
hashcpy(sha1_stat->sha1, EMPTY_BLOB_SHA1_BIN);
sha1_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 (sha1_stat) {
int pos;
if (sha1_stat->valid &&
!match_stat_data_racy(&the_index, &sha1_stat->stat, &st))
; /* no content change, ss->sha1 still good */
else if (check_index &&
(pos = cache_name_pos(fname, strlen(fname))) >= 0 &&
!ce_stage(active_cache[pos]) &&
ce_uptodate(active_cache[pos]) &&
!would_convert_to_git(fname))
hashcpy(sha1_stat->sha1,
active_cache[pos]->oid.hash);
else
hash_sha1_file(buf, size, "blob", sha1_stat->sha1);
fill_stat_data(&sha1_stat->stat, &st);
sha1_stat->valid = 1;
}
}
el->filebuf = buf;
if (skip_utf8_bom(&buf, size))
size -= buf - el->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_exclude(entry, base, baselen, el, lineno);
}
lineno++;
entry = buf + i + 1;
}
}
return 0;
}
int add_excludes_from_file_to_list(const char *fname, const char *base,
int baselen, struct exclude_list *el,
int check_index)
{
return add_excludes(fname, base, baselen, el, check_index, NULL);
}
struct exclude_list *add_exclude_list(struct dir_struct *dir,
int group_type, const char *src)
{
struct exclude_list *el;
struct exclude_list_group *group;
group = &dir->exclude_list_group[group_type];
ALLOC_GROW(group->el, group->nr + 1, group->alloc);
el = &group->el[group->nr++];
memset(el, 0, sizeof(*el));
el->src = src;
return el;
}
/*
* Used to set up core.excludesfile and .git/info/exclude lists.
*/
static void add_excludes_from_file_1(struct dir_struct *dir, const char *fname,
struct sha1_stat *sha1_stat)
{
struct exclude_list *el;
/*
* 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++;
el = add_exclude_list(dir, EXC_FILE, fname);
if (add_excludes(fname, "", 0, el, 0, sha1_stat) < 0)
die("cannot use %s as an exclude file", fname);
}
void add_excludes_from_file(struct dir_struct *dir, const char *fname)
{
dir->unmanaged_exclude_files++; /* see validate_untracked_cache() */
add_excludes_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 & EXC_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,
unsigned flags)
{
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 exclude *last_exclude_matching_from_list(const char *pathname,
int pathlen,
const char *basename,
int *dtype,
struct exclude_list *el)
{
struct exclude *exc = NULL; /* undecided */
int i;
if (!el->nr)
return NULL; /* undefined */
for (i = el->nr - 1; 0 <= i; i--) {
struct exclude *x = el->excludes[i];
const char *exclude = x->pattern;
int prefix = x->nowildcardlen;
if (x->flags & EXC_FLAG_MUSTBEDIR) {
if (*dtype == DT_UNKNOWN)
*dtype = get_dtype(NULL, pathname, pathlen);
if (*dtype != DT_DIR)
continue;
}
if (x->flags & EXC_FLAG_NODIR) {
if (match_basename(basename,
pathlen - (basename - pathname),
exclude, prefix, x->patternlen,
x->flags)) {
exc = x;
break;
}
continue;
}
assert(x->baselen == 0 || x->base[x->baselen - 1] == '/');
if (match_pathname(pathname, pathlen,
x->base, x->baselen ? x->baselen - 1 : 0,
exclude, prefix, x->patternlen, x->flags)) {
exc = x;
break;
}
}
return exc;
}
/*
* Scan the list and let the last match determine the fate.
* Return 1 for exclude, 0 for include and -1 for undecided.
*/
int is_excluded_from_list(const char *pathname,
int pathlen, const char *basename, int *dtype,
struct exclude_list *el)
{
struct exclude *exclude;
exclude = last_exclude_matching_from_list(pathname, pathlen, basename, dtype, el);
if (exclude)
return exclude->flags & EXC_FLAG_NEGATIVE ? 0 : 1;
return -1; /* undecided */
}
static struct exclude *last_exclude_matching_from_lists(struct dir_struct *dir,
const char *pathname, int pathlen, const char *basename,
int *dtype_p)
{
int i, j;
struct exclude_list_group *group;
struct exclude *exclude;
for (i = EXC_CMDL; i <= EXC_FILE; i++) {
group = &dir->exclude_list_group[i];
for (j = group->nr - 1; j >= 0; j--) {
exclude = last_exclude_matching_from_list(
pathname, pathlen, basename, dtype_p,
&group->el[j]);
if (exclude)
return exclude;
}
}
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, const char *base, int baselen)
{
struct exclude_list_group *group;
struct exclude_list *el;
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;
el = &group->el[dir->exclude_stack->exclude_ix];
dir->exclude_stack = stk->prev;
dir->exclude = NULL;
free((char *)el->src); /* see strbuf_detach() below */
clear_exclude_list(el);
free(stk);
group->nr--;
}
/* Skip traversing into sub directories if the parent is excluded */
if (dir->exclude)
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 sha1_stat sha1_stat;
stk = xcalloc(1, sizeof(*stk));
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;
el = add_exclude_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->exclude = last_exclude_matching_from_lists(dir,
dir->basebuf.buf, stk->baselen - 1,
dir->basebuf.buf + current, &dt);
dir->basebuf.buf[stk->baselen - 1] = '/';
if (dir->exclude &&
dir->exclude->flags & EXC_FLAG_NEGATIVE)
dir->exclude = NULL;
if (dir->exclude) {
dir->exclude_stack = stk;
return;
}
}
/* Try to read per-directory file */
hashclr(sha1_stat.sha1);
sha1_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_sha1). Then we can skip
* loading .gitignore, which would result in
* ENOENT anyway.
*/
!is_null_sha1(untracked->exclude_sha1))) {
/*
* dir->basebuf gets reused by the traversal, but we
* need fname to remain unchanged to ensure the src
* member of each struct exclude correctly
* back-references its source file. Other invocations
* of add_exclude_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);
el->src = strbuf_detach(&sb, NULL);
add_excludes(el->src, el->src, stk->baselen, el, 1,
untracked ? &sha1_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_exclude_matching(). When the cache is
* used, last_exclude_matching() 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_exclude_matching(). Be careful about ignore rule
* order, though, if you do that.
*/
if (untracked &&
hashcmp(sha1_stat.sha1, untracked->exclude_sha1)) {
invalidate_gitignore(dir->untracked, untracked);
hashcpy(untracked->exclude_sha1, sha1_stat.sha1);
}
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 exclude *last_exclude_matching(struct dir_struct *dir,
const char *pathname,
int *dtype_p)
{
int pathlen = strlen(pathname);
const char *basename = strrchr(pathname, '/');
basename = (basename) ? basename+1 : pathname;
prep_exclude(dir, pathname, basename-pathname);
if (dir->exclude)
return dir->exclude;
return last_exclude_matching_from_lists(dir, 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, const char *pathname, int *dtype_p)
{
struct exclude *exclude =
last_exclude_matching(dir, pathname, dtype_p);
if (exclude)
return exclude->flags & EXC_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, const char *pathname, int len)
{
if (cache_file_exists(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, const char *pathname, int len)
{
if (!cache_name_is_other(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(const char *dirname, int len)
{
struct cache_entry *ce;
if (cache_dir_exists(dirname, len))
return index_directory;
ce = cache_file_exists(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(const char *dirname, int len)
{
int pos;
if (ignore_case)
return directory_exists_in_index_icase(dirname, len);
pos = cache_name_pos(dirname, len);
if (pos < 0)
pos = -pos-1;
while (pos < active_nr) {
const struct cache_entry *ce = active_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 "show_other_directories" is true, we show it as
* just a directory, unless "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
* 'no_gitlinks' set 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 untracked_cache_dir *untracked,
const char *dirname, int len, int baselen, int exclude,
const struct path_simplify *simplify)
{
/* The "len-1" is to strip the final '/' */
switch (directory_exists_in_index(dirname, len-1)) {
case index_directory:
return path_recurse;
case index_gitdir:
return path_none;
case index_nonexistent:
if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
break;
if (!(dir->flags & DIR_NO_GITLINKS)) {
unsigned char sha1[20];
if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
return path_untracked;
}
return path_recurse;
}
/* This is the "show_other_directories" case */
if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
return exclude ? path_excluded : path_untracked;
untracked = lookup_untracked(dir->untracked, untracked,
dirname + baselen, len - baselen);
return read_directory_recursive(dir, dirname, len,
untracked, 1, simplify);
}
/*
* 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 path_simplify *simplify)
{
if (simplify) {
for (;;) {
const char *match = simplify->path;
int len = simplify->len;
if (!match)
break;
if (len > pathlen)
len = pathlen;
if (!memcmp(path, match, len))
return 0;
simplify++;
}
return 1;
}
return 0;
}
/*
* 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 len,
const struct path_simplify *simplify)
{
if (simplify) {
for (; simplify->path; simplify++) {
if (len == simplify->len
&& !memcmp(path, simplify->path, len))
return 1;
if (len < simplify->len
&& simplify->path[len] == '/'
&& !memcmp(path, simplify->path, len))
return 1;
}
}
return 0;
}
static int get_index_dtype(const char *path, int len)
{
int pos;
const struct cache_entry *ce;
ce = cache_file_exists(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 = cache_name_pos(path, len);
if (pos >= 0)
return DT_UNKNOWN;
pos = -pos-1;
while (pos < active_nr) {
ce = active_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 get_dtype(struct dirent *de, const char *path, int len)
{
int dtype = de ? DTYPE(de) : DT_UNKNOWN;
struct stat st;
if (dtype != DT_UNKNOWN)
return dtype;
dtype = get_index_dtype(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_one_path(struct dir_struct *dir,
struct untracked_cache_dir *untracked,
struct strbuf *path,
int baselen,
const struct path_simplify *simplify,
int dtype, struct dirent *de)
{
int exclude;
int has_path_in_index = !!cache_file_exists(path->buf, path->len, ignore_case);
if (dtype == DT_UNKNOWN)
dtype = get_dtype(de, path->buf, path->len);
/* Always exclude indexed files */
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(path->buf, path->len) == index_nonexistent))
return path_none;
exclude = is_excluded(dir, path->buf, &dtype);
/*
* Excluded? If we don't explicitly want to show
* ignored files, ignore it
*/
if (exclude && !(dir->flags & (DIR_SHOW_IGNORED|DIR_SHOW_IGNORED_TOO)))
return path_excluded;
switch (dtype) {
default:
return path_none;
case DT_DIR:
strbuf_addch(path, '/');
return treat_directory(dir, untracked, path->buf, path->len,
baselen, exclude, simplify);
case DT_REG:
case DT_LNK:
return exclude ? path_excluded : path_untracked;
}
}
static enum path_treatment treat_path_fast(struct dir_struct *dir,
struct untracked_cache_dir *untracked,
struct cached_dir *cdir,
struct strbuf *path,
int baselen,
const struct path_simplify *simplify)
{
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, path->buf, path->len,
cdir->ucd, 1, simplify);
/*
* 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 strbuf *path,
int baselen,
const struct path_simplify *simplify)
{
int dtype;
struct dirent *de = cdir->de;
if (!de)
return treat_path_fast(dir, untracked, cdir, path,
baselen, simplify);
if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
return path_none;
strbuf_setlen(path, baselen);
strbuf_addstr(path, de->d_name);
if (simplify_away(path->buf, path->len, simplify))
return path_none;
dtype = DTYPE(de);
return treat_one_path(dir, untracked, path, baselen, simplify, dtype, de);
}
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 strbuf *path,
int check_only)
{
struct stat st;
if (!untracked)
return 0;
if (stat(path->len ? path->buf : ".", &st)) {
invalidate_directory(dir->untracked, untracked);
memset(&untracked->stat_data, 0, sizeof(untracked->stat_data));
return 0;
}
if (!untracked->valid ||
match_stat_data_racy(&the_index, &untracked->stat_data, &st)) {
if (untracked->valid)
invalidate_directory(dir->untracked, untracked);
fill_stat_data(&untracked->stat_data, &st);
return 0;
}
if (untracked->check_only != !!check_only) {
invalidate_directory(dir->untracked, untracked);
return 0;
}
/*
* prep_exclude will be called eventually on this directory,
* but it's called much later in last_exclude_matching(). 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, path->buf, path->len);
strbuf_setlen(path, path->len - 1);
} else
prep_exclude(dir, 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 strbuf *path,
int check_only)
{
memset(cdir, 0, sizeof(*cdir));
cdir->untracked = untracked;
if (valid_cached_dir(dir, untracked, path, check_only))
return 0;
cdir->fdir = opendir(path->len ? path->buf : ".");
if (dir->untracked)
dir->untracked->dir_opened++;
if (!cdir->fdir)
return -1;
return 0;
}
static int read_cached_dir(struct cached_dir *cdir)
{
if (cdir->fdir) {
cdir->de = readdir(cdir->fdir);
if (!cdir->de)
return -1;
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;
}
}
/*
* 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.
*
* Returns the most significant path_treatment value encountered in the scan.
*/
static enum path_treatment read_directory_recursive(struct dir_struct *dir,
const char *base, int baselen,
struct untracked_cache_dir *untracked, int check_only,
const struct path_simplify *simplify)
{
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, &path, check_only))
goto out;
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, &path, baselen, simplify);
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, path.buf, path.len,
ud, check_only, simplify);
if (subdir_state > dir_state)
dir_state = subdir_state;
}
if (check_only) {
/* 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 dir_add_* part */
continue;
}
/* add the path to the appropriate result list */
switch (state) {
case path_excluded:
if (dir->flags & DIR_SHOW_IGNORED)
dir_add_name(dir, path.buf, path.len);
else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
((dir->flags & DIR_COLLECT_IGNORED) &&
exclude_matches_pathspec(path.buf, path.len,
simplify)))
dir_add_ignored(dir, path.buf, path.len);
break;
case path_untracked:
if (dir->flags & DIR_SHOW_IGNORED)
break;
dir_add_name(dir, path.buf, path.len);
if (cdir.fdir)
add_untracked(untracked, path.buf + baselen);
break;
default:
break;
}
}
close_cached_dir(&cdir);
out:
strbuf_release(&path);
return dir_state;
}
static int cmp_name(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);
}
static struct path_simplify *create_simplify(const char **pathspec)
{
int nr, alloc = 0;
struct path_simplify *simplify = NULL;
if (!pathspec)
return NULL;
for (nr = 0 ; ; nr++) {
const char *match;
ALLOC_GROW(simplify, nr + 1, alloc);
match = *pathspec++;
if (!match)
break;
simplify[nr].path = match;
simplify[nr].len = simple_length(match);
}
simplify[nr].path = NULL;
simplify[nr].len = 0;
return simplify;
}
static void free_simplify(struct path_simplify *simplify)
{
free(simplify);
}
static int treat_leading_path(struct dir_struct *dir,
const char *path, int len,
const struct path_simplify *simplify)
{
struct strbuf sb = STRBUF_INIT;
int baselen, rc = 0;
const char *cp;
int old_flags = dir->flags;
while (len && path[len - 1] == '/')
len--;
if (!len)
return 1;
baselen = 0;
dir->flags &= ~DIR_SHOW_OTHER_DIRECTORIES;
while (1) {
cp = path + baselen + !!baselen;
cp = memchr(cp, '/', path + len - cp);
if (!cp)
baselen = len;
else
baselen = cp - path;
strbuf_setlen(&sb, 0);
strbuf_add(&sb, path, baselen);
if (!is_directory(sb.buf))
break;
if (simplify_away(sb.buf, sb.len, simplify))
break;
if (treat_one_path(dir, NULL, &sb, baselen, simplify,
DT_DIR, NULL) == path_none)
break; /* do not recurse into it */
if (len <= baselen) {
rc = 1;
break; /* finished checking */
}
}
strbuf_release(&sb);
dir->flags = old_flags;
return rc;
}
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 void new_untracked_cache(struct index_state *istate)
{
struct untracked_cache *uc = xcalloc(1, sizeof(*uc));
strbuf_init(&uc->ident, 100);
uc->exclude_per_dir = ".gitignore";
/* should be the same flags used by git-status */