Makefile: -lpthread may still be necessary when libc has only pthread stubs
[gitweb.git] / dir.c
diff --git a/dir.c b/dir.c
index 5d0a3084dbe1e7a23f7863f6c206914fbbfc0bf6..cb83332a261f97026f9c6273afb162245944dec7 100644 (file)
--- a/dir.c
+++ b/dir.c
@@ -200,11 +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;
@@ -212,24 +236,39 @@ 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;
+               if (size == 0) {
+                       free(buf);
+                       return 0;
+               }
+               if (buf[size-1] != '\n') {
+                       buf = xrealloc(buf, size+1);
+                       buf[size++] = '\n';
+               }
        }
-       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+1);
+               if (read_in_full(fd, buf, size) != size) {
+                       free(buf);
+                       close(fd);
+                       return -1;
+               }
+               buf[size++] = '\n';
+               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') {
@@ -241,17 +280,12 @@ 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);
 }
 
@@ -300,9 +334,9 @@ 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;
        }
@@ -312,9 +346,9 @@ 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;
 
@@ -325,6 +359,12 @@ 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, pathlen);
                                if (*dtype != DT_DIR)
@@ -382,8 +422,8 @@ 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:
@@ -554,13 +594,29 @@ static int simplify_away(const char *path, int pathlen, const struct path_simpli
        return 0;
 }
 
-static int in_pathspec(const char *path, int len, const struct path_simplify *simplify)
+/*
+ * 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;
@@ -625,6 +681,92 @@ static int get_dtype(struct dirent *de, const char *path, int len)
        return dtype;
 }
 
+enum path_treatment {
+       path_ignored,
+       path_handled,
+       path_recurse,
+};
+
+static enum path_treatment treat_one_path(struct dir_struct *dir,
+                                         char *path, int *len,
+                                         const struct path_simplify *simplify,
+                                         int dtype, struct dirent *de)
+{
+       int exclude = excluded(dir, path, &dtype);
+       if (exclude && (dir->flags & DIR_COLLECT_IGNORED)
+           && exclude_matches_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->flags & DIR_SHOW_IGNORED))
+               return path_ignored;
+
+       if (dtype == DT_UNKNOWN)
+               dtype = get_dtype(de, 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:
+               memcpy(path + *len, "/", 2);
+               (*len)++;
+               switch (treat_directory(dir, 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,
+                                     char *path, int path_max,
+                                     int baselen,
+                                     const struct path_simplify *simplify,
+                                     int *len)
+{
+       int dtype;
+
+       if (is_dot_or_dotdot(de->d_name) || !strcmp(de->d_name, ".git"))
+               return path_ignored;
+       *len = strlen(de->d_name);
+       /* Ignore overly long pathnames! */
+       if (*len + baselen + 8 > path_max)
+               return path_ignored;
+       memcpy(path + baselen, de->d_name, *len + 1);
+       *len += baselen;
+       if (simplify_away(path, *len, simplify))
+               return path_ignored;
+
+       dtype = DTYPE(de);
+       return treat_one_path(dir, path, len, simplify, dtype, de);
+}
+
 /*
  * Read a directory tree. We currently ignore anything but
  * directories, regular files and symlinks. That's because git
@@ -634,7 +776,10 @@ static int get_dtype(struct dirent *de, const char *path, 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 *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(*base ? base : ".");
        int contents = 0;
@@ -645,70 +790,16 @@ static int read_directory_recursive(struct dir_struct *dir, const char *base, in
                memcpy(path, base, baselen);
 
                while ((de = readdir(fdir)) != NULL) {
-                       int len, dtype;
-                       int exclude;
-
-                       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(path))
-                               continue;
-                       memcpy(path + baselen, de->d_name, len+1);
-                       len = baselen + len;
-                       if (simplify_away(path, len, simplify))
-                               continue;
-
-                       dtype = DTYPE(de);
-                       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->flags & DIR_SHOW_IGNORED))
+                       int len;
+                       switch (treat_path(dir, de, path, sizeof(path),
+                                          baselen, simplify, &len)) {
+                       case path_recurse:
+                               contents += read_directory_recursive
+                                       (dir, path, len, 0, simplify);
                                continue;
-
-                       if (dtype == DT_UNKNOWN)
-                               dtype = get_dtype(de, 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)
-                                       continue;
-                       }
-
-                       switch (dtype) {
-                       default:
+                       case path_ignored:
                                continue;
-                       case DT_DIR:
-                               memcpy(path + len, "/", 2);
-                               len++;
-                               switch (treat_directory(dir, path, len, simplify)) {
-                               case show_directory:
-                                       if (exclude != !!(dir->flags
-                                                       & DIR_SHOW_IGNORED))
-                                               continue;
-                                       break;
-                               case recurse_into_directory:
-                                       contents += read_directory_recursive(dir,
-                                               path, len, 0, simplify);
-                                       continue;
-                               case ignore_directory:
-                                       continue;
-                               }
-                               break;
-                       case DT_REG:
-                       case DT_LNK:
+                       case path_handled:
                                break;
                        }
                        contents++;
@@ -778,6 +869,41 @@ 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)
+{
+       char pathbuf[PATH_MAX];
+       int baselen, blen;
+       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;
+               memcpy(pathbuf, path, baselen);
+               pathbuf[baselen] = '\0';
+               if (!is_directory(pathbuf))
+                       return 0;
+               if (simplify_away(pathbuf, baselen, simplify))
+                       return 0;
+               blen = baselen;
+               if (treat_one_path(dir, pathbuf, &blen, simplify,
+                                  DT_DIR, NULL) == path_ignored)
+                       return 0; /* do not recurse into it */
+               if (len <= baselen)
+                       return 1; /* finished checking */
+       }
+}
+
 int read_directory(struct dir_struct *dir, const char *path, int len, const char **pathspec)
 {
        struct path_simplify *simplify;
@@ -786,7 +912,8 @@ int read_directory(struct dir_struct *dir, const char *path, int len, const char
                return dir->nr;
 
        simplify = create_simplify(pathspec);
-       read_directory_recursive(dir, path, len, 0, simplify);
+       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);