Doc: Make comment about merging in tutorial.txt more clear

diff --git a/dir.c b/dir.c
index d778ecd8908d7a32519cc9c31d8333de3fad0ae6..96389b32e66af24896220e4738cd93bf2ac75704 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -101,8 +101,8 @@ void add_exclude(const char *string, const char *base,
        x->baselen = baselen;
        if (which->nr == which->alloc) {
                which->alloc = alloc_nr(which->alloc);
-               which->excludes = realloc(which->excludes,
-                                         which->alloc * sizeof(x));
+               which->excludes = xrealloc(which->excludes,
+                                          which->alloc * sizeof(x));
        }
        which->excludes[which->nr++] = x;
 }
@@ -112,17 +112,15 @@ static int add_excludes_from_file_1(const char *fname,
                                    int baselen,
                                    struct exclude_list *which)
 {
+       struct stat st;
        int fd, i;
        long size;
        char *buf, *entry;
 
        fd = open(fname, O_RDONLY);
-       if (fd < 0)
+       if (fd < 0 || fstat(fd, &st) < 0)
                goto err;
-       size = lseek(fd, 0, SEEK_END);
-       if (size < 0)
-               goto err;
-       lseek(fd, 0, SEEK_SET);
+       size = st.st_size;
        if (size == 0) {
                close(fd);
                return 0;
@@ -285,7 +283,7 @@ static int dir_exists(const char *dirname, int len)
  * 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)
+static int read_directory_recursive(struct dir_struct *dir, const char *path, const char *base, int baselen, int check_only)
 {
        DIR *fdir = opendir(path);
        int contents = 0;
@@ -293,7 +291,7 @@ static int read_directory_recursive(struct dir_struct *dir, const char *path, co
        if (fdir) {
                int exclude_stk;
                struct dirent *de;
-               char fullname[MAXPATHLEN + 1];
+               char fullname[PATH_MAX + 1];
                memcpy(fullname, base, baselen);
 
                exclude_stk = push_exclude_per_directory(dir, base, baselen);
@@ -316,7 +314,6 @@ static int read_directory_recursive(struct dir_struct *dir, const char *path, co
 
                        switch (DTYPE(de)) {
                        struct stat st;
-                       int subdir, rewind_base;
                        default:
                                continue;
                        case DT_UNKNOWN:
@@ -330,26 +327,30 @@ static int read_directory_recursive(struct dir_struct *dir, const char *path, co
                        case DT_DIR:
                                memcpy(fullname + baselen + len, "/", 2);
                                len++;
-                               rewind_base = dir->nr;
-                               subdir = read_directory_recursive(dir, fullname, fullname,
-                                                       baselen + len);
                                if (dir->show_other_directories &&
-                                   (subdir || !dir->hide_empty_directories) &&
                                    !dir_exists(fullname, baselen + len)) {
-                                       // Rewind the read subdirectory
-                                       while (dir->nr > rewind_base)
-                                               free(dir->entries[--dir->nr]);
+                                       if (dir->hide_empty_directories &&
+                                           !read_directory_recursive(dir,
+                                                   fullname, fullname,
+                                                   baselen + len, 1))
+                                               continue;
                                        break;
                                }
-                               contents += subdir;
+
+                               contents += read_directory_recursive(dir,
+                                       fullname, fullname, baselen + len, 0);
                                continue;
                        case DT_REG:
                        case DT_LNK:
                                break;
                        }
-                       add_name(dir, fullname, baselen + len);
                        contents++;
+                       if (check_only)
+                               goto exit_early;
+                       else
+                               add_name(dir, fullname, baselen + len);
                }
+exit_early:
                closedir(fdir);
 
                pop_exclude_per_directory(dir, exclude_stk);
@@ -395,7 +396,14 @@ int read_directory(struct dir_struct *dir, const char *path, const char *base, i
                }
        }
 
-       read_directory_recursive(dir, path, base, baselen);
+       read_directory_recursive(dir, path, base, baselen, 0);
        qsort(dir->entries, dir->nr, sizeof(struct dir_entry *), cmp_name);
        return dir->nr;
 }
+
+int
+file_exists(const char *f)
+{
+  struct stat sb;
+  return stat(f, &sb) == 0;
+}