git/dir.c
Junio C Hamano 55b38a48e2 warn_on_inaccessible(): a helper to warn on inaccessible paths
The previous series introduced warnings to multiple places, but it
could become tiring to see the warning on the same path over and
over again during a single run of Git.  Making just one function
responsible for issuing this warning, we could later choose to keep
track of which paths we issued a warning (it would involve a hash
table of paths after running them through real_path() or something)
in order to reduce noise.

Right now we do not know if the noise reduction is necessary, but it
still would be a good code reduction/sharing anyway.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-08-21 14:52:07 -07:00

1388 lines
32 KiB
C

/*
* 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 "dir.h"
#include "refs.h"
struct path_simplify {
int len;
const char *path;
};
static int read_directory_recursive(struct dir_struct *dir, const char *path, int len,
int check_only, const struct path_simplify *simplify);
static int get_dtype(struct dirent *de, const char *path, int len);
/* helper string functions with support for the ignore_case flag */
int strcmp_icase(const char *a, const char *b)
{
return ignore_case ? strcasecmp(a, b) : strcmp(a, b);
}
int strncmp_icase(const char *a, const char *b, size_t count)
{
return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
}
int fnmatch_icase(const char *pattern, const char *string, int flags)
{
return fnmatch(pattern, string, flags | (ignore_case ? FNM_CASEFOLD : 0));
}
static size_t common_prefix_len(const char **pathspec)
{
const char *n, *first;
size_t max = 0;
if (!pathspec)
return max;
first = *pathspec;
while ((n = *pathspec++)) {
size_t i, len = 0;
for (i = 0; first == n || i < max; i++) {
char c = n[i];
if (!c || c != first[i] || is_glob_special(c))
break;
if (c == '/')
len = i + 1;
}
if (first == n || 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 char **pathspec)
{
unsigned long len = common_prefix_len(pathspec);
return len ? xmemdupz(*pathspec, len) : NULL;
}
int fill_directory(struct dir_struct *dir, const char **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 ? *pathspec : "", 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;
}
/*
* 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_one(const char *match, const char *name, int namelen)
{
int matchlen;
/* If the match was just the prefix, we matched */
if (!*match)
return MATCHED_RECURSIVELY;
if (ignore_case) {
for (;;) {
unsigned char c1 = tolower(*match);
unsigned char c2 = tolower(*name);
if (c1 == '\0' || is_glob_special(c1))
break;
if (c1 != c2)
return 0;
match++;
name++;
namelen--;
}
} else {
for (;;) {
unsigned char c1 = *match;
unsigned char c2 = *name;
if (c1 == '\0' || is_glob_special(c1))
break;
if (c1 != c2)
return 0;
match++;
name++;
namelen--;
}
}
/*
* If we don't match the matchstring exactly,
* we need to match by fnmatch
*/
matchlen = strlen(match);
if (strncmp_icase(match, name, matchlen))
return !fnmatch_icase(match, name, 0) ? MATCHED_FNMATCH : 0;
if (namelen == matchlen)
return MATCHED_EXACTLY;
if (match[matchlen-1] == '/' || name[matchlen] == '/')
return MATCHED_RECURSIVELY;
return 0;
}
/*
* Given a name and a list of pathspecs, see if the name matches
* any of the pathspecs. The caller is also interested in seeing
* all pathspec matches some names it calls this function with
* (otherwise the user could have mistyped the unmatched pathspec),
* and a mark is left in seen[] array for pathspec element that
* actually matched anything.
*/
int match_pathspec(const char **pathspec, const char *name, int namelen,
int prefix, char *seen)
{
int i, retval = 0;
if (!pathspec)
return 1;
name += prefix;
namelen -= prefix;
for (i = 0; pathspec[i] != NULL; i++) {
int how;
const char *match = pathspec[i] + prefix;
if (seen && seen[i] == MATCHED_EXACTLY)
continue;
how = match_one(match, name, namelen);
if (how) {
if (retval < how)
retval = how;
if (seen && seen[i] < how)
seen[i] = how;
}
}
return retval;
}
/*
* 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)
{
/* name/namelen has prefix cut off by caller */
const char *match = item->match + prefix;
int matchlen = item->len - prefix;
/* If the match was just the prefix, we matched */
if (!*match)
return MATCHED_RECURSIVELY;
if (matchlen <= namelen && !strncmp(match, name, matchlen)) {
if (matchlen == namelen)
return MATCHED_EXACTLY;
if (match[matchlen-1] == '/' || name[matchlen] == '/')
return MATCHED_RECURSIVELY;
}
if (item->use_wildcard && !fnmatch(match, name, 0))
return MATCHED_FNMATCH;
return 0;
}
/*
* Given a name and a list of pathspecs, see if the name matches
* any of the pathspecs. The caller is also interested in seeing
* all pathspec matches some names it calls this function with
* (otherwise the user could have mistyped the unmatched pathspec),
* and a mark is left in seen[] array for pathspec element that
* actually matched anything.
*/
int match_pathspec_depth(const struct pathspec *ps,
const char *name, int namelen,
int prefix, char *seen)
{
int i, retval = 0;
if (!ps->nr) {
if (!ps->recursive || 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 (seen && seen[i] == MATCHED_EXACTLY)
continue;
how = match_pathspec_item(ps->items+i, prefix, name, namelen);
if (ps->recursive && 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;
}
/*
* Return the length of the "simple" part of a path match limiter.
*/
static int simple_length(const char *match)
{
int len = -1;
for (;;) {
unsigned char c = *match++;
len++;
if (c == '\0' || is_glob_special(c))
return len;
}
}
static int no_wildcard(const char *string)
{
return string[simple_length(string)] == '\0';
}
void add_exclude(const char *string, const char *base,
int baselen, struct exclude_list *which)
{
struct exclude *x;
size_t len;
int to_exclude = 1;
int flags = 0;
if (*string == '!') {
to_exclude = 0;
string++;
}
len = strlen(string);
if (len && string[len - 1] == '/') {
char *s;
x = xmalloc(sizeof(*x) + len);
s = (char *)(x+1);
memcpy(s, string, len - 1);
s[len - 1] = '\0';
string = s;
x->pattern = s;
flags = EXC_FLAG_MUSTBEDIR;
} else {
x = xmalloc(sizeof(*x));
x->pattern = string;
}
x->to_exclude = to_exclude;
x->patternlen = strlen(string);
x->base = base;
x->baselen = baselen;
x->flags = flags;
if (!strchr(string, '/'))
x->flags |= EXC_FLAG_NODIR;
x->nowildcardlen = simple_length(string);
if (*string == '*' && no_wildcard(string+1))
x->flags |= EXC_FLAG_ENDSWITH;
ALLOC_GROW(which->excludes, which->nr + 1, which->alloc);
which->excludes[which->nr++] = x;
}
static void *read_skip_worktree_file_from_index(const char *path, size_t *size)
{
int pos, len;
unsigned long sz;
enum object_type type;
void *data;
struct index_state *istate = &the_index;
len = strlen(path);
pos = index_name_pos(istate, path, len);
if (pos < 0)
return NULL;
if (!ce_skip_worktree(istate->cache[pos]))
return NULL;
data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz);
if (!data || type != OBJ_BLOB) {
free(data);
return NULL;
}
*size = xsize_t(sz);
return data;
}
void free_excludes(struct exclude_list *el)
{
int i;
for (i = 0; i < el->nr; i++)
free(el->excludes[i]);
free(el->excludes);
el->nr = 0;
el->excludes = NULL;
}
int add_excludes_from_file_to_list(const char *fname,
const char *base,
int baselen,
char **buf_p,
struct exclude_list *which,
int check_index)
{
struct stat st;
int fd, i;
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)) == NULL)
return -1;
if (size == 0) {
free(buf);
return 0;
}
if (buf[size-1] != '\n') {
buf = xrealloc(buf, size+1);
buf[size++] = '\n';
}
}
else {
size = xsize_t(st.st_size);
if (size == 0) {
close(fd);
return 0;
}
buf = xmalloc(size+1);
if (read_in_full(fd, buf, size) != size) {
free(buf);
close(fd);
return -1;
}
buf[size++] = '\n';
close(fd);
}
if (buf_p)
*buf_p = buf;
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;
add_exclude(entry, base, baselen, which);
}
entry = buf + i + 1;
}
}
return 0;
}
void add_excludes_from_file(struct dir_struct *dir, const char *fname)
{
if (add_excludes_from_file_to_list(fname, "", 0, NULL,
&dir->exclude_list[EXC_FILE], 0) < 0)
die("cannot use %s as an exclude file", fname);
}
static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
{
struct exclude_list *el;
struct exclude_stack *stk = NULL;
int current;
if ((!dir->exclude_per_dir) ||
(baselen + strlen(dir->exclude_per_dir) >= PATH_MAX))
return; /* too long a path -- ignore */
/* Pop the ones that are not the prefix of the path being checked. */
el = &dir->exclude_list[EXC_DIRS];
while ((stk = dir->exclude_stack) != NULL) {
if (stk->baselen <= baselen &&
!strncmp(dir->basebuf, base, stk->baselen))
break;
dir->exclude_stack = stk->prev;
while (stk->exclude_ix < el->nr)
free(el->excludes[--el->nr]);
free(stk->filebuf);
free(stk);
}
/* Read from the parent directories and push them down. */
current = stk ? stk->baselen : -1;
while (current < baselen) {
struct exclude_stack *stk = xcalloc(1, sizeof(*stk));
const char *cp;
if (current < 0) {
cp = base;
current = 0;
}
else {
cp = strchr(base + current + 1, '/');
if (!cp)
die("oops in prep_exclude");
cp++;
}
stk->prev = dir->exclude_stack;
stk->baselen = cp - base;
stk->exclude_ix = el->nr;
memcpy(dir->basebuf + current, base + current,
stk->baselen - current);
strcpy(dir->basebuf + stk->baselen, dir->exclude_per_dir);
add_excludes_from_file_to_list(dir->basebuf,
dir->basebuf, stk->baselen,
&stk->filebuf, el, 1);
dir->exclude_stack = stk;
current = stk->baselen;
}
dir->basebuf[baselen] = '\0';
}
/* Scan the list and let the last match determine the fate.
* Return 1 for exclude, 0 for include and -1 for undecided.
*/
int excluded_from_list(const char *pathname,
int pathlen, const char *basename, int *dtype,
struct exclude_list *el)
{
int i;
if (!el->nr)
return -1; /* undefined */
for (i = el->nr - 1; 0 <= i; i--) {
struct exclude *x = el->excludes[i];
const char *name, *exclude = x->pattern;
int to_exclude = x->to_exclude;
int namelen, 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) {
/* match basename */
if (prefix == x->patternlen) {
if (!strcmp_icase(exclude, basename))
return to_exclude;
} else if (x->flags & EXC_FLAG_ENDSWITH) {
if (x->patternlen - 1 <= pathlen &&
!strcmp_icase(exclude + 1, pathname + pathlen - x->patternlen + 1))
return to_exclude;
} else {
if (fnmatch_icase(exclude, basename, 0) == 0)
return to_exclude;
}
continue;
}
/* match with FNM_PATHNAME:
* exclude has base (baselen long) implicitly in front of it.
*/
if (*exclude == '/') {
exclude++;
prefix--;
}
if (pathlen < x->baselen ||
(x->baselen && pathname[x->baselen-1] != '/') ||
strncmp_icase(pathname, x->base, x->baselen))
continue;
namelen = x->baselen ? pathlen - x->baselen : pathlen;
name = pathname + pathlen - namelen;
/* if the non-wildcard part is longer than the
remaining pathname, surely it cannot match */
if (prefix > namelen)
continue;
if (prefix) {
if (strncmp_icase(exclude, name, prefix))
continue;
exclude += prefix;
name += prefix;
namelen -= prefix;
}
if (!namelen || !fnmatch_icase(exclude, name, FNM_PATHNAME))
return to_exclude;
}
return -1; /* undecided */
}
static int excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
{
int pathlen = strlen(pathname);
int st;
const char *basename = strrchr(pathname, '/');
basename = (basename) ? basename+1 : pathname;
prep_exclude(dir, pathname, basename-pathname);
for (st = EXC_CMDL; st <= EXC_FILE; st++) {
switch (excluded_from_list(pathname, pathlen, basename,
dtype_p, &dir->exclude_list[st])) {
case 0:
return 0;
case 1:
return 1;
}
}
return 0;
}
void path_exclude_check_init(struct path_exclude_check *check,
struct dir_struct *dir)
{
check->dir = dir;
strbuf_init(&check->path, 256);
}
void path_exclude_check_clear(struct path_exclude_check *check)
{
strbuf_release(&check->path);
}
/*
* Is this name excluded? This is for a caller like show_files() that
* do not honor directory hierarchy and iterate through paths that are
* possibly in an ignored directory.
*
* A path to a directory known to be excluded is left in check->path to
* optimize for repeated checks for files in the same excluded directory.
*/
int path_excluded(struct path_exclude_check *check,
const char *name, int namelen, int *dtype)
{
int i;
struct strbuf *path = &check->path;
/*
* we allow the caller to pass namelen as an optimization; it
* must match the length of the name, as we eventually call
* excluded() on the whole name string.
*/
if (namelen < 0)
namelen = strlen(name);
if (path->len &&
path->len <= namelen &&
!memcmp(name, path->buf, path->len) &&
(!name[path->len] || name[path->len] == '/'))
return 1;
strbuf_setlen(path, 0);
for (i = 0; name[i]; i++) {
int ch = name[i];
if (ch == '/') {
int dt = DT_DIR;
if (excluded(check->dir, path->buf, &dt))
return 1;
}
strbuf_addch(path, ch);
}
/* An entry in the index; cannot be a directory with subentries */
strbuf_setlen(path, 0);
return excluded(check->dir, name, dtype);
}
static struct dir_entry *dir_entry_new(const char *pathname, int len)
{
struct dir_entry *ent;
ent = xmalloc(sizeof(*ent) + len + 1);
ent->len = len;
memcpy(ent->name, pathname, len);
ent->name[len] = 0;
return ent;
}
static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathname, int len)
{
if (cache_name_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 stored index to look up
* the directory name; instead, use the case insensitive
* name hash.
*/
static enum exist_status directory_exists_in_index_icase(const char *dirname, int len)
{
struct cache_entry *ce = index_name_exists(&the_index, dirname, len + 1, ignore_case);
unsigned char endchar;
if (!ce)
return index_nonexistent;
endchar = ce->name[len];
/*
* The cache_entry structure returned will contain this dirname
* and possibly additional path components.
*/
if (endchar == '/')
return index_directory;
/*
* If there are no additional path components, then this cache_entry
* represents a submodule. Submodules, despite being directories,
* are stored in the cache without a closing slash.
*/
if (!endchar && S_ISGITLINK(ce->ce_mode))
return index_gitdir;
/* This should never be hit, but it exists just in case. */
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) {
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 and the directory is empty, in which case
* we just ignore it entirely.
* (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.
*/
enum directory_treatment {
show_directory,
ignore_directory,
recurse_into_directory
};
static enum directory_treatment treat_directory(struct dir_struct *dir,
const char *dirname, int len,
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 recurse_into_directory;
case index_gitdir:
if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
return ignore_directory;
return show_directory;
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 show_directory;
}
return recurse_into_directory;
}
/* This is the "show_other_directories" case */
if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
return show_directory;
if (!read_directory_recursive(dir, dirname, len, 1, simplify))
return ignore_directory;
return show_directory;
}
/*
* 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;
struct cache_entry *ce;
ce = cache_name_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;
}
enum path_treatment {
path_ignored,
path_handled,
path_recurse
};
static enum path_treatment treat_one_path(struct dir_struct *dir,
struct strbuf *path,
const struct path_simplify *simplify,
int dtype, struct dirent *de)
{
int exclude = excluded(dir, path->buf, &dtype);
if (exclude && (dir->flags & DIR_COLLECT_IGNORED)
&& exclude_matches_pathspec(path->buf, path->len, simplify))
dir_add_ignored(dir, path->buf, path->len);
/*
* Excluded? If we don't explicitly want to show
* ignored files, ignore it
*/
if (exclude && !(dir->flags & DIR_SHOW_IGNORED))
return path_ignored;
if (dtype == DT_UNKNOWN)
dtype = get_dtype(de, path->buf, path->len);
/*
* Do we want to see just the ignored files?
* We still need to recurse into directories,
* even if we don't ignore them, since the
* directory may contain files that we do..
*/
if (!exclude && (dir->flags & DIR_SHOW_IGNORED)) {
if (dtype != DT_DIR)
return path_ignored;
}
switch (dtype) {
default:
return path_ignored;
case DT_DIR:
strbuf_addch(path, '/');
switch (treat_directory(dir, path->buf, path->len, simplify)) {
case show_directory:
if (exclude != !!(dir->flags
& DIR_SHOW_IGNORED))
return path_ignored;
break;
case recurse_into_directory:
return path_recurse;
case ignore_directory:
return path_ignored;
}
break;
case DT_REG:
case DT_LNK:
break;
}
return path_handled;
}
static enum path_treatment treat_path(struct dir_struct *dir,
struct dirent *de,
struct strbuf *path,
int baselen,
const struct path_simplify *simplify)
{
int dtype;
if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
return path_ignored;
strbuf_setlen(path, baselen);
strbuf_addstr(path, de->d_name);
if (simplify_away(path->buf, path->len, simplify))
return path_ignored;
dtype = DTYPE(de);
return treat_one_path(dir, path, simplify, dtype, de);
}
/*
* 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.
*/
static int read_directory_recursive(struct dir_struct *dir,
const char *base, int baselen,
int check_only,
const struct path_simplify *simplify)
{
DIR *fdir;
int contents = 0;
struct dirent *de;
struct strbuf path = STRBUF_INIT;
strbuf_add(&path, base, baselen);
fdir = opendir(path.len ? path.buf : ".");
if (!fdir)
goto out;
while ((de = readdir(fdir)) != NULL) {
switch (treat_path(dir, de, &path, baselen, simplify)) {
case path_recurse:
contents += read_directory_recursive(dir, path.buf,
path.len, 0,
simplify);
continue;
case path_ignored:
continue;
case path_handled:
break;
}
contents++;
if (check_only)
break;
dir_add_name(dir, path.buf, path.len);
}
closedir(fdir);
out:
strbuf_release(&path);
return contents;
}
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 cache_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;
if (nr >= alloc) {
alloc = alloc_nr(alloc);
simplify = xrealloc(simplify, alloc * sizeof(*simplify));
}
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;
while (len && path[len - 1] == '/')
len--;
if (!len)
return 1;
baselen = 0;
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, &sb, simplify,
DT_DIR, NULL) == path_ignored)
break; /* do not recurse into it */
if (len <= baselen) {
rc = 1;
break; /* finished checking */
}
}
strbuf_release(&sb);
return rc;
}
int read_directory(struct dir_struct *dir, const char *path, int len, const char **pathspec)
{
struct path_simplify *simplify;
if (has_symlink_leading_path(path, len))
return dir->nr;
simplify = create_simplify(pathspec);
if (!len || treat_leading_path(dir, path, len, simplify))
read_directory_recursive(dir, path, len, 0, simplify);
free_simplify(simplify);
qsort(dir->entries, dir->nr, sizeof(struct dir_entry *), cmp_name);
qsort(dir->ignored, dir->ignored_nr, sizeof(struct dir_entry *), cmp_name);
return dir->nr;
}
int file_exists(const char *f)
{
struct stat sb;
return lstat(f, &sb) == 0;
}
/*
* 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 && *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[PATH_MAX];
if (!dir)
return 0;
if (!getcwd(cwd, sizeof(cwd)))
die_errno("can't find the current directory");
return dir_inside_of(cwd, dir) >= 0;
}
int is_empty_dir(const char *path)
{
DIR *dir = opendir(path);
struct dirent *e;
int ret = 1;
if (!dir)
return 0;
while ((e = readdir(dir)) != NULL)
if (!is_dot_or_dotdot(e->d_name)) {
ret = 0;
break;
}
closedir(dir);
return ret;
}
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);
unsigned char submodule_head[20];
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) {
/* an empty dir could be removed even if it is unreadble */
if (!keep_toplevel)
return rmdir(path->buf);
else
return -1;
}
if (path->buf[original_len - 1] != '/')
strbuf_addch(path, '/');
len = path->len;
while ((e = readdir(dir)) != NULL) {
struct stat st;
if (is_dot_or_dotdot(e->d_name))
continue;
strbuf_setlen(path, len);
strbuf_addstr(path, e->d_name);
if (lstat(path->buf, &st))
; /* fall thru */
else if (S_ISDIR(st.st_mode)) {
if (!remove_dir_recurse(path, flag, &kept_down))
continue; /* happy */
} else if (!only_empty && !unlink(path->buf))
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)
ret = rmdir(path->buf);
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);
}
void setup_standard_excludes(struct dir_struct *dir)
{
const char *path;
char *xdg_path;
dir->exclude_per_dir = ".gitignore";
path = git_path("info/exclude");
if (!excludes_file) {
home_config_paths(NULL, &xdg_path, "ignore");
excludes_file = xdg_path;
}
if (!access_or_warn(path, R_OK))
add_excludes_from_file(dir, path);
if (excludes_file && !access_or_warn(excludes_file, R_OK))
add_excludes_from_file(dir, excludes_file);
}
int remove_path(const char *name)
{
char *slash;
if (unlink(name) && errno != ENOENT)
return -1;
slash = strrchr(name, '/');
if (slash) {
char *dirs = xstrdup(name);
slash = dirs + (slash - name);
do {
*slash = '\0';
} while (rmdir(dirs) == 0 && (slash = strrchr(dirs, '/')));
free(dirs);
}
return 0;
}
static int pathspec_item_cmp(const void *a_, const void *b_)
{
struct pathspec_item *a, *b;
a = (struct pathspec_item *)a_;
b = (struct pathspec_item *)b_;
return strcmp(a->match, b->match);
}
int init_pathspec(struct pathspec *pathspec, const char **paths)
{
const char **p = paths;
int i;
memset(pathspec, 0, sizeof(*pathspec));
if (!p)
return 0;
while (*p)
p++;
pathspec->raw = paths;
pathspec->nr = p - paths;
if (!pathspec->nr)
return 0;
pathspec->items = xmalloc(sizeof(struct pathspec_item)*pathspec->nr);
for (i = 0; i < pathspec->nr; i++) {
struct pathspec_item *item = pathspec->items+i;
const char *path = paths[i];
item->match = path;
item->len = strlen(path);
item->use_wildcard = !no_wildcard(path);
if (item->use_wildcard)
pathspec->has_wildcard = 1;
}
qsort(pathspec->items, pathspec->nr,
sizeof(struct pathspec_item), pathspec_item_cmp);
return 0;
}
void free_pathspec(struct pathspec *pathspec)
{
free(pathspec->items);
pathspec->items = NULL;
}