Add branch --set-upstream
[gitweb.git] / dir.c
diff --git a/dir.c b/dir.c
index 53ad921a0b93a70c7614dcdab25c6ef3e9a0c8b6..3a8d3e67a529c03659dc950d64f4b0d6226f9925 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -14,12 +14,11 @@ struct path_simplify {
        const char *path;
 };
 
-static int read_directory_recursive(struct dir_struct *dir,
-       const char *path, const char *base, int baselen,
+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);
+static int get_dtype(struct dirent *de, const char *path, int len);
 
-int common_prefix(const char **pathspec)
+static int common_prefix(const char **pathspec)
 {
        const char *path, *slash, *next;
        int prefix;
@@ -52,6 +51,26 @@ int common_prefix(const char **pathspec)
        return prefix;
 }
 
+int fill_directory(struct dir_struct *dir, const char **pathspec)
+{
+       const char *path;
+       int len;
+
+       /*
+        * Calculate common prefix for the pathspec, and
+        * use that to optimize the directory walk
+        */
+       len = common_prefix(pathspec);
+       path = "";
+
+       if (len)
+               path = xmemdupz(*pathspec, len);
+
+       /* Read the directory and prune it */
+       read_directory(dir, path, len, pathspec);
+       return len;
+}
+
 /*
  * Does 'match' match the given name?
  * A match is found if
@@ -75,7 +94,7 @@ static int match_one(const char *match, const char *name, int namelen)
        for (;;) {
                unsigned char c1 = *match;
                unsigned char c2 = *name;
-               if (isspecial(c1))
+               if (c1 == '\0' || is_glob_special(c1))
                        break;
                if (c1 != c2)
                        return 0;
@@ -108,25 +127,28 @@ static int match_one(const char *match, const char *name, int namelen)
  * 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 match_pathspec(const char **pathspec, const char *name, int namelen,
+               int prefix, char *seen)
 {
-       int retval;
-       const char *match;
+       int i, retval = 0;
+
+       if (!pathspec)
+               return 1;
 
        name += prefix;
        namelen -= prefix;
 
-       for (retval = 0; (match = *pathspec++) != NULL; seen++) {
+       for (i = 0; pathspec[i] != NULL; i++) {
                int how;
-               if (retval && *seen == MATCHED_EXACTLY)
+               const char *match = pathspec[i] + prefix;
+               if (seen && seen[i] == MATCHED_EXACTLY)
                        continue;
-               match += prefix;
                how = match_one(match, name, namelen);
                if (how) {
                        if (retval < how)
                                retval = how;
-                       if (*seen < how)
-                               *seen = how;
+                       if (seen && seen[i] < how)
+                               seen[i] = how;
                }
        }
        return retval;
@@ -153,7 +175,7 @@ void add_exclude(const char *string, const char *base,
        if (len && string[len - 1] == '/') {
                char *s;
                x = xmalloc(sizeof(*x) + len);
-               s = (char*)(x+1);
+               s = (char *)(x+1);
                memcpy(s, string, len - 1);
                s[len - 1] = '\0';
                string = s;
@@ -178,11 +200,35 @@ void add_exclude(const char *string, const char *base,
        which->excludes[which->nr++] = x;
 }
 
-static int add_excludes_from_file_1(const char *fname,
-                                   const char *base,
-                                   int baselen,
-                                   char **buf_p,
-                                   struct exclude_list *which)
+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;
+}
+
+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;
@@ -190,27 +236,32 @@ static int add_excludes_from_file_1(const char *fname,
        char *buf, *entry;
 
        fd = open(fname, O_RDONLY);
-       if (fd < 0 || fstat(fd, &st) < 0)
-               goto err;
-       size = xsize_t(st.st_size);
-       if (size == 0) {
-               close(fd);
-               return 0;
+       if (fd < 0 || fstat(fd, &st) < 0) {
+               if (0 <= fd)
+                       close(fd);
+               if (!check_index ||
+                   (buf = read_skip_worktree_file_from_index(fname, &size)) == NULL)
+                       return -1;
        }
-       buf = xmalloc(size+1);
-       if (read_in_full(fd, buf, size) != size)
-       {
-               free(buf);
-               goto err;
+       else {
+               size = xsize_t(st.st_size);
+               if (size == 0) {
+                       close(fd);
+                       return 0;
+               }
+               buf = xmalloc(size);
+               if (read_in_full(fd, buf, size) != size) {
+                       close(fd);
+                       return -1;
+               }
+               close(fd);
        }
-       close(fd);
 
        if (buf_p)
                *buf_p = buf;
-       buf[size++] = '\n';
        entry = buf;
-       for (i = 0; i < size; i++) {
-               if (buf[i] == '\n') {
+       for (i = 0; i <= size; i++) {
+               if (i == size || buf[i] == '\n') {
                        if (entry != buf + i && entry[0] != '#') {
                                buf[i - (i && buf[i-1] == '\r')] = 0;
                                add_exclude(entry, base, baselen, which);
@@ -219,17 +270,12 @@ static int add_excludes_from_file_1(const char *fname,
                }
        }
        return 0;
-
- err:
-       if (0 <= fd)
-               close(fd);
-       return -1;
 }
 
 void add_excludes_from_file(struct dir_struct *dir, const char *fname)
 {
-       if (add_excludes_from_file_1(fname, "", 0, NULL,
-                                    &dir->exclude_list[EXC_FILE]) < 0)
+       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);
 }
 
@@ -278,9 +324,9 @@ static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
                memcpy(dir->basebuf + current, base + current,
                       stk->baselen - current);
                strcpy(dir->basebuf + stk->baselen, dir->exclude_per_dir);
-               add_excludes_from_file_1(dir->basebuf,
-                                        dir->basebuf, stk->baselen,
-                                        &stk->filebuf, el);
+               add_excludes_from_file_to_list(dir->basebuf,
+                                              dir->basebuf, stk->baselen,
+                                              &stk->filebuf, el, 1);
                dir->exclude_stack = stk;
                current = stk->baselen;
        }
@@ -290,9 +336,9 @@ static void prep_exclude(struct dir_struct *dir, const char *base, int baselen)
 /* Scan the list and let the last match determine the fate.
  * Return 1 for exclude, 0 for include and -1 for undecided.
  */
-static int excluded_1(const char *pathname,
-                     int pathlen, const char *basename, int *dtype,
-                     struct exclude_list *el)
+int excluded_from_list(const char *pathname,
+                      int pathlen, const char *basename, int *dtype,
+                      struct exclude_list *el)
 {
        int i;
 
@@ -303,8 +349,14 @@ static int excluded_1(const char *pathname,
                        int to_exclude = x->to_exclude;
 
                        if (x->flags & EXC_FLAG_MUSTBEDIR) {
+                               if (!dtype) {
+                                       if (!prefixcmp(pathname, exclude))
+                                               return to_exclude;
+                                       else
+                                               continue;
+                               }
                                if (*dtype == DT_UNKNOWN)
-                                       *dtype = get_dtype(NULL, pathname);
+                                       *dtype = get_dtype(NULL, pathname, pathlen);
                                if (*dtype != DT_DIR)
                                        continue;
                        }
@@ -360,8 +412,8 @@ int excluded(struct dir_struct *dir, const char *pathname, int *dtype_p)
 
        prep_exclude(dir, pathname, basename-pathname);
        for (st = EXC_CMDL; st <= EXC_FILE; st++) {
-               switch (excluded_1(pathname, pathlen, basename,
-                                  dtype_p, &dir->exclude_list[st])) {
+               switch (excluded_from_list(pathname, pathlen, basename,
+                                          dtype_p, &dir->exclude_list[st])) {
                case 0:
                        return 0;
                case 1:
@@ -393,7 +445,7 @@ static struct dir_entry *dir_add_name(struct dir_struct *dir, const char *pathna
 
 static struct dir_entry *dir_add_ignored(struct dir_struct *dir, const char *pathname, int len)
 {
-       if (cache_name_pos(pathname, len) >= 0)
+       if (!cache_name_is_other(pathname, len))
                return NULL;
 
        ALLOC_GROW(dir->ignored, dir->ignored_nr+1, dir->ignored_alloc);
@@ -484,14 +536,14 @@ static enum directory_treatment treat_directory(struct dir_struct *dir,
                return recurse_into_directory;
 
        case index_gitdir:
-               if (dir->show_other_directories)
+               if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
                        return ignore_directory;
                return show_directory;
 
        case index_nonexistent:
-               if (dir->show_other_directories)
+               if (dir->flags & DIR_SHOW_OTHER_DIRECTORIES)
                        break;
-               if (!dir->no_gitlinks) {
+               if (!(dir->flags & DIR_NO_GITLINKS)) {
                        unsigned char sha1[20];
                        if (resolve_gitlink_ref(dirname, "HEAD", sha1) == 0)
                                return show_directory;
@@ -500,9 +552,9 @@ static enum directory_treatment treat_directory(struct dir_struct *dir,
        }
 
        /* This is the "show_other_directories" case */
-       if (!dir->hide_empty_directories)
+       if (!(dir->flags & DIR_HIDE_EMPTY_DIRECTORIES))
                return show_directory;
-       if (!read_directory_recursive(dir, dirname, dirname, len, 1, simplify))
+       if (!read_directory_recursive(dir, dirname, len, 1, simplify))
                return ignore_directory;
        return show_directory;
 }
@@ -544,11 +596,52 @@ static int in_pathspec(const char *path, int len, const struct path_simplify *si
        return 0;
 }
 
-static int get_dtype(struct dirent *de, const char *path)
+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))
@@ -571,48 +664,47 @@ static int get_dtype(struct dirent *de, const char *path)
  * 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 *path, const char *base, int baselen, int check_only, const struct path_simplify *simplify)
+static int read_directory_recursive(struct dir_struct *dir, const char *base, int baselen, int check_only, const struct path_simplify *simplify)
 {
-       DIR *fdir = opendir(path);
+       DIR *fdir = opendir(*base ? base : ".");
        int contents = 0;
 
        if (fdir) {
                struct dirent *de;
-               char fullname[PATH_MAX + 1];
-               memcpy(fullname, base, baselen);
+               char path[PATH_MAX + 1];
+               memcpy(path, base, baselen);
 
                while ((de = readdir(fdir)) != NULL) {
                        int len, dtype;
                        int exclude;
 
-                       if ((de->d_name[0] == '.') &&
-                           (de->d_name[1] == 0 ||
-                            !strcmp(de->d_name + 1, ".") ||
-                            !strcmp(de->d_name + 1, "git")))
+                       if (is_dot_or_dotdot(de->d_name) ||
+                            !strcmp(de->d_name, ".git"))
                                continue;
                        len = strlen(de->d_name);
                        /* Ignore overly long pathnames! */
-                       if (len + baselen + 8 > sizeof(fullname))
+                       if (len + baselen + 8 > sizeof(path))
                                continue;
-                       memcpy(fullname + baselen, de->d_name, len+1);
-                       if (simplify_away(fullname, baselen + len, simplify))
+                       memcpy(path + baselen, de->d_name, len+1);
+                       len = baselen + len;
+                       if (simplify_away(path, len, simplify))
                                continue;
 
                        dtype = DTYPE(de);
-                       exclude = excluded(dir, fullname, &dtype);
-                       if (exclude && dir->collect_ignored
-                           && in_pathspec(fullname, baselen + len, simplify))
-                               dir_add_ignored(dir, fullname, baselen + len);
+                       exclude = excluded(dir, path, &dtype);
+                       if (exclude && (dir->flags & DIR_COLLECT_IGNORED)
+                           && in_pathspec(path, len, simplify))
+                               dir_add_ignored(dir, path,len);
 
                        /*
                         * Excluded? If we don't explicitly want to show
                         * ignored files, ignore it
                         */
-                       if (exclude && !dir->show_ignored)
+                       if (exclude && !(dir->flags & DIR_SHOW_IGNORED))
                                continue;
 
                        if (dtype == DT_UNKNOWN)
-                               dtype = get_dtype(de, fullname);
+                               dtype = get_dtype(de, path, len);
 
                        /*
                         * Do we want to see just the ignored files?
@@ -620,7 +712,7 @@ static int read_directory_recursive(struct dir_struct *dir, const char *path, co
                         * even if we don't ignore them, since the
                         * directory may contain files that we do..
                         */
-                       if (!exclude && dir->show_ignored) {
+                       if (!exclude && (dir->flags & DIR_SHOW_IGNORED)) {
                                if (dtype != DT_DIR)
                                        continue;
                        }
@@ -629,16 +721,17 @@ static int read_directory_recursive(struct dir_struct *dir, const char *path, co
                        default:
                                continue;
                        case DT_DIR:
-                               memcpy(fullname + baselen + len, "/", 2);
+                               memcpy(path + len, "/", 2);
                                len++;
-                               switch (treat_directory(dir, fullname, baselen + len, simplify)) {
+                               switch (treat_directory(dir, path, len, simplify)) {
                                case show_directory:
-                                       if (exclude != dir->show_ignored)
+                                       if (exclude != !!(dir->flags
+                                                       & DIR_SHOW_IGNORED))
                                                continue;
                                        break;
                                case recurse_into_directory:
                                        contents += read_directory_recursive(dir,
-                                               fullname, fullname, baselen + len, 0, simplify);
+                                               path, len, 0, simplify);
                                        continue;
                                case ignore_directory:
                                        continue;
@@ -652,7 +745,7 @@ static int read_directory_recursive(struct dir_struct *dir, const char *path, co
                        if (check_only)
                                goto exit_early;
                        else
-                               dir_add_name(dir, fullname, baselen + len);
+                               dir_add_name(dir, path, len);
                }
 exit_early:
                closedir(fdir);
@@ -680,7 +773,7 @@ static int simple_length(const char *match)
        for (;;) {
                unsigned char c = *match++;
                len++;
-               if (isspecial(c))
+               if (c == '\0' || is_glob_special(c))
                        return len;
        }
 }
@@ -715,15 +808,15 @@ static void free_simplify(struct path_simplify *simplify)
        free(simplify);
 }
 
-int read_directory(struct dir_struct *dir, const char *path, const char *base, int baselen, const char **pathspec)
+int read_directory(struct dir_struct *dir, const char *path, int len, const char **pathspec)
 {
        struct path_simplify *simplify;
 
-       if (has_symlink_leading_path(strlen(path), path))
+       if (has_symlink_leading_path(path, len))
                return dir->nr;
 
        simplify = create_simplify(pathspec);
-       read_directory_recursive(dir, path, base, baselen, 0, 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);
@@ -757,7 +850,7 @@ char *get_relative_cwd(char *buffer, int size, const char *dir)
        if (!dir)
                return NULL;
        if (!getcwd(buffer, size))
-               die("can't find the current directory: %s", strerror(errno));
+               die_errno("can't find the current directory");
 
        if (!is_absolute_path(dir))
                dir = make_absolute_path(dir);
@@ -779,12 +872,39 @@ int is_inside_dir(const char *dir)
        return get_relative_cwd(buffer, sizeof(buffer), dir) != NULL;
 }
 
-int remove_dir_recursively(struct strbuf *path, int only_empty)
+int is_empty_dir(const char *path)
 {
-       DIR *dir = opendir(path->buf);
+       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;
+}
+
+int remove_dir_recursively(struct strbuf *path, int flag)
+{
+       DIR *dir;
        struct dirent *e;
        int ret = 0, original_len = path->len, len;
+       int only_empty = (flag & REMOVE_DIR_EMPTY_ONLY);
+       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. */
+               return 0;
+
+       dir = opendir(path->buf);
        if (!dir)
                return -1;
        if (path->buf[original_len - 1] != '/')
@@ -793,10 +913,8 @@ int remove_dir_recursively(struct strbuf *path, int only_empty)
        len = path->len;
        while ((e = readdir(dir)) != NULL) {
                struct stat st;
-               if ((e->d_name[0] == '.') &&
-                   ((e->d_name[1] == 0) ||
-                    ((e->d_name[1] == '.') && e->d_name[2] == 0)))
-                       continue; /* "." and ".." */
+               if (is_dot_or_dotdot(e->d_name))
+                       continue;
 
                strbuf_setlen(path, len);
                strbuf_addstr(path, e->d_name);