docs/diff-options: clarify scope of diff-filter types
[gitweb.git] / dir.c
diff --git a/dir.c b/dir.c
index 656f272adc69b633ddd06277bf9cc77205a7e8ee..aeeb5ce10490ef1e0adb907d1e21bcbbbbb401ac 100644 (file)
--- a/dir.c
+++ b/dir.c
 #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
@@ -50,16 +45,15 @@ struct cached_dir {
 
 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);
+       int check_only, const struct pathspec *pathspec);
 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)
+int fspathcmp(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)
+int fspathncmp(const char *a, const char *b, size_t count)
 {
        return ignore_case ? strncasecmp(a, b, count) : strncmp(a, b, count);
 }
@@ -180,17 +174,20 @@ char *common_prefix(const struct pathspec *pathspec)
 
 int fill_directory(struct dir_struct *dir, const struct pathspec *pathspec)
 {
-       size_t len;
+       const char *prefix;
+       size_t prefix_len;
 
        /*
         * Calculate common prefix for the pathspec, and
         * use that to optimize the directory walk
         */
-       len = common_prefix_len(pathspec);
+       prefix_len = common_prefix_len(pathspec);
+       prefix = prefix_len ? pathspec->items[0].match : "";
 
        /* Read the directory and prune it */
-       read_directory(dir, pathspec->nr ? pathspec->_raw[0] : "", len, pathspec);
-       return len;
+       read_directory(dir, prefix, prefix_len, pathspec);
+
+       return prefix_len;
 }
 
 int within_depth(const char *name, int namelen,
@@ -208,8 +205,9 @@ int within_depth(const char *name, int namelen,
        return 1;
 }
 
-#define DO_MATCH_EXCLUDE   1
-#define DO_MATCH_DIRECTORY 2
+#define DO_MATCH_EXCLUDE   (1<<0)
+#define DO_MATCH_DIRECTORY (1<<1)
+#define DO_MATCH_SUBMODULE (1<<2)
 
 /*
  * Does 'match' match the given name?
@@ -284,6 +282,32 @@ static int match_pathspec_item(const struct pathspec_item *item, int prefix,
                         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;
 }
 
@@ -387,6 +411,21 @@ int match_pathspec(const struct pathspec *ps,
        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)
@@ -526,7 +565,7 @@ static void *read_skip_worktree_file_from_index(const char *path, size_t *size,
                return NULL;
        if (!ce_skip_worktree(active_cache[pos]))
                return NULL;
-       data = read_sha1_file(active_cache[pos]->sha1, &type, &sz);
+       data = read_sha1_file(active_cache[pos]->oid.hash, &type, &sz);
        if (!data || type != OBJ_BLOB) {
                free(data);
                return NULL;
@@ -534,7 +573,7 @@ static void *read_skip_worktree_file_from_index(const char *path, size_t *size,
        *size = xsize_t(sz);
        if (sha1_stat) {
                memset(&sha1_stat->stat, 0, sizeof(sha1_stat->stat));
-               hashcpy(sha1_stat->sha1, active_cache[pos]->sha1);
+               hashcpy(sha1_stat->sha1, active_cache[pos]->oid.hash);
        }
        return data;
 }
@@ -714,7 +753,8 @@ static int add_excludes(const char *fname, const char *base, int baselen,
                                 !ce_stage(active_cache[pos]) &&
                                 ce_uptodate(active_cache[pos]) &&
                                 !would_convert_to_git(fname))
-                               hashcpy(sha1_stat->sha1, active_cache[pos]->sha1);
+                               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);
@@ -795,12 +835,12 @@ int match_basename(const char *basename, int basenamelen,
 {
        if (prefix == patternlen) {
                if (patternlen == basenamelen &&
-                   !strncmp_icase(pattern, basename, basenamelen))
+                   !fspathncmp(pattern, basename, basenamelen))
                        return 1;
        } else if (flags & EXC_FLAG_ENDSWITH) {
                /* "*literal" matching against "fooliteral" */
                if (patternlen - 1 <= basenamelen &&
-                   !strncmp_icase(pattern + 1,
+                   !fspathncmp(pattern + 1,
                                   basename + basenamelen - (patternlen - 1),
                                   patternlen - 1))
                        return 1;
@@ -837,7 +877,7 @@ int match_pathname(const char *pathname, int pathlen,
         */
        if (pathlen < baselen + 1 ||
            (baselen && pathname[baselen] != '/') ||
-           strncmp_icase(pathname, base, baselen))
+           fspathncmp(pathname, base, baselen))
                return 0;
 
        namelen = baselen ? pathlen - baselen - 1 : pathlen;
@@ -851,7 +891,7 @@ int match_pathname(const char *pathname, int pathlen,
                if (prefix > namelen)
                        return 0;
 
-               if (strncmp_icase(pattern, name, prefix))
+               if (fspathncmp(pattern, name, prefix))
                        return 0;
                pattern += prefix;
                patternlen -= prefix;
@@ -1270,7 +1310,7 @@ static enum exist_status directory_exists_in_index(const char *dirname, int len)
 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)
+       const struct pathspec *pathspec)
 {
        /* The "len-1" is to strip the final '/' */
        switch (directory_exists_in_index(dirname, len-1)) {
@@ -1299,7 +1339,7 @@ static enum path_treatment treat_directory(struct dir_struct *dir,
        untracked = lookup_untracked(dir->untracked, untracked,
                                     dirname + baselen, len - baselen);
        return read_directory_recursive(dir, dirname, len,
-                                       untracked, 1, simplify);
+                                       untracked, 1, pathspec);
 }
 
 /*
@@ -1307,24 +1347,33 @@ static enum path_treatment treat_directory(struct dir_struct *dir,
  * 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)
+static int simplify_away(const char *path, int pathlen,
+                        const struct pathspec *pathspec)
 {
-       if (simplify) {
-               for (;;) {
-                       const char *match = simplify->path;
-                       int len = simplify->len;
+       int i;
 
-                       if (!match)
-                               break;
-                       if (len > pathlen)
-                               len = pathlen;
-                       if (!memcmp(path, match, len))
-                               return 0;
-                       simplify++;
-               }
-               return 1;
+       if (!pathspec || !pathspec->nr)
+               return 0;
+
+       GUARD_PATHSPEC(pathspec,
+                      PATHSPEC_FROMTOP |
+                      PATHSPEC_MAXDEPTH |
+                      PATHSPEC_LITERAL |
+                      PATHSPEC_GLOB |
+                      PATHSPEC_ICASE |
+                      PATHSPEC_EXCLUDE);
+
+       for (i = 0; i < pathspec->nr; i++) {
+               const struct pathspec_item *item = &pathspec->items[i];
+               int len = item->nowildcard_len;
+
+               if (len > pathlen)
+                       len = pathlen;
+               if (!ps_strncmp(item, item->match, path, len))
+                       return 0;
        }
-       return 0;
+
+       return 1;
 }
 
 /*
@@ -1338,19 +1387,33 @@ static int simplify_away(const char *path, int pathlen, const struct path_simpli
  *   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;
-               }
+static int exclude_matches_pathspec(const char *path, int pathlen,
+                                   const struct pathspec *pathspec)
+{
+       int i;
+
+       if (!pathspec || !pathspec->nr)
+               return 0;
+
+       GUARD_PATHSPEC(pathspec,
+                      PATHSPEC_FROMTOP |
+                      PATHSPEC_MAXDEPTH |
+                      PATHSPEC_LITERAL |
+                      PATHSPEC_GLOB |
+                      PATHSPEC_ICASE |
+                      PATHSPEC_EXCLUDE);
+
+       for (i = 0; i < pathspec->nr; i++) {
+               const struct pathspec_item *item = &pathspec->items[i];
+               int len = item->nowildcard_len;
+
+               if (len == pathlen &&
+                   !ps_strncmp(item, item->match, path, pathlen))
+                       return 1;
+               if (len > pathlen &&
+                   item->match[pathlen] == '/' &&
+                   !ps_strncmp(item, item->match, path, pathlen))
+                       return 1;
        }
        return 0;
 }
@@ -1418,7 +1481,7 @@ 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,
+                                         const struct pathspec *pathspec,
                                          int dtype, struct dirent *de)
 {
        int exclude;
@@ -1470,7 +1533,7 @@ static enum path_treatment treat_one_path(struct dir_struct *dir,
        case DT_DIR:
                strbuf_addch(path, '/');
                return treat_directory(dir, untracked, path->buf, path->len,
-                                      baselen, exclude, simplify);
+                                      baselen, exclude, pathspec);
        case DT_REG:
        case DT_LNK:
                return exclude ? path_excluded : path_untracked;
@@ -1482,7 +1545,7 @@ static enum path_treatment treat_path_fast(struct dir_struct *dir,
                                           struct cached_dir *cdir,
                                           struct strbuf *path,
                                           int baselen,
-                                          const struct path_simplify *simplify)
+                                          const struct pathspec *pathspec)
 {
        strbuf_setlen(path, baselen);
        if (!cdir->ucd) {
@@ -1499,7 +1562,7 @@ static enum path_treatment treat_path_fast(struct dir_struct *dir,
                 * with check_only set.
                 */
                return read_directory_recursive(dir, path->buf, path->len,
-                                               cdir->ucd, 1, simplify);
+                                               cdir->ucd, 1, pathspec);
        /*
         * We get path_recurse in the first run when
         * directory_exists_in_index() returns index_nonexistent. We
@@ -1514,23 +1577,23 @@ static enum path_treatment treat_path(struct dir_struct *dir,
                                      struct cached_dir *cdir,
                                      struct strbuf *path,
                                      int baselen,
-                                     const struct path_simplify *simplify)
+                                     const struct pathspec *pathspec)
 {
        int dtype;
        struct dirent *de = cdir->de;
 
        if (!de)
                return treat_path_fast(dir, untracked, cdir, path,
-                                      baselen, simplify);
+                                      baselen, pathspec);
        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))
+       if (simplify_away(path->buf, path->len, pathspec))
                return path_none;
 
        dtype = DTYPE(de);
-       return treat_one_path(dir, untracked, path, baselen, simplify, dtype, de);
+       return treat_one_path(dir, untracked, path, baselen, pathspec, dtype, de);
 }
 
 static void add_untracked(struct untracked_cache_dir *dir, const char *name)
@@ -1661,7 +1724,7 @@ static void close_cached_dir(struct cached_dir *cdir)
 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)
+                                   const struct pathspec *pathspec)
 {
        struct cached_dir cdir;
        enum path_treatment state, subdir_state, dir_state = path_none;
@@ -1677,7 +1740,8 @@ static enum path_treatment read_directory_recursive(struct dir_struct *dir,
 
        while (!read_cached_dir(&cdir)) {
                /* check how the file or directory should be treated */
-               state = treat_path(dir, untracked, &cdir, &path, baselen, simplify);
+               state = treat_path(dir, untracked, &cdir, &path,
+                                  baselen, pathspec);
 
                if (state > dir_state)
                        dir_state = state;
@@ -1689,8 +1753,9 @@ static enum path_treatment read_directory_recursive(struct dir_struct *dir,
                                              path.buf + baselen,
                                              path.len - baselen);
                        subdir_state =
-                               read_directory_recursive(dir, path.buf, path.len,
-                                                        ud, check_only, simplify);
+                               read_directory_recursive(dir, path.buf,
+                                                        path.len, ud,
+                                                        check_only, pathspec);
                        if (subdir_state > dir_state)
                                dir_state = subdir_state;
                }
@@ -1714,7 +1779,7 @@ static enum path_treatment read_directory_recursive(struct dir_struct *dir,
                        else if ((dir->flags & DIR_SHOW_IGNORED_TOO) ||
                                ((dir->flags & DIR_COLLECT_IGNORED) &&
                                exclude_matches_pathspec(path.buf, path.len,
-                                       simplify)))
+                                                        pathspec)))
                                dir_add_ignored(dir, path.buf, path.len);
                        break;
 
@@ -1745,36 +1810,9 @@ static int cmp_name(const void *p1, const void *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)
+                             const struct pathspec *pathspec)
 {
        struct strbuf sb = STRBUF_INIT;
        int baselen, rc = 0;
@@ -1798,9 +1836,9 @@ static int treat_leading_path(struct dir_struct *dir,
                strbuf_add(&sb, path, baselen);
                if (!is_directory(sb.buf))
                        break;
-               if (simplify_away(sb.buf, sb.len, simplify))
+               if (simplify_away(sb.buf, sb.len, pathspec))
                        break;
-               if (treat_one_path(dir, NULL, &sb, baselen, simplify,
+               if (treat_one_path(dir, NULL, &sb, baselen, pathspec,
                                   DT_DIR, NULL) == path_none)
                        break; /* do not recurse into it */
                if (len <= baselen) {
@@ -1968,33 +2006,14 @@ static struct untracked_cache_dir *validate_untracked_cache(struct dir_struct *d
        return root;
 }
 
-int read_directory(struct dir_struct *dir, const char *path, int len, const struct pathspec *pathspec)
+int read_directory(struct dir_struct *dir, const char *path,
+                  int len, const struct pathspec *pathspec)
 {
-       struct path_simplify *simplify;
        struct untracked_cache_dir *untracked;
 
-       /*
-        * Check out create_simplify()
-        */
-       if (pathspec)
-               GUARD_PATHSPEC(pathspec,
-                              PATHSPEC_FROMTOP |
-                              PATHSPEC_MAXDEPTH |
-                              PATHSPEC_LITERAL |
-                              PATHSPEC_GLOB |
-                              PATHSPEC_ICASE |
-                              PATHSPEC_EXCLUDE);
-
        if (has_symlink_leading_path(path, len))
                return dir->nr;
 
-       /*
-        * exclude patterns are treated like positive ones in
-        * create_simplify. Usually exclude patterns should be a
-        * subset of positive ones, which has no impacts on
-        * create_simplify().
-        */
-       simplify = create_simplify(pathspec ? pathspec->_raw : NULL);
        untracked = validate_untracked_cache(dir, len, pathspec);
        if (!untracked)
                /*
@@ -2002,11 +2021,10 @@ int read_directory(struct dir_struct *dir, const char *path, int len, const stru
                 * e.g. prep_exclude()
                 */
                dir->untracked = NULL;
-       if (!len || treat_leading_path(dir, path, len, simplify))
-               read_directory_recursive(dir, path, len, untracked, 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);
+       if (!len || treat_leading_path(dir, path, len, pathspec))
+               read_directory_recursive(dir, path, len, untracked, 0, pathspec);
+       QSORT(dir->entries, dir->nr, cmp_name);
+       QSORT(dir->ignored, dir->ignored_nr, cmp_name);
        if (dir->untracked) {
                static struct trace_key trace_untracked_stats = TRACE_KEY_INIT(UNTRACKED_STATS);
                trace_printf_key(&trace_untracked_stats,
@@ -2195,8 +2213,6 @@ static GIT_PATH_FUNC(git_path_info_exclude, "info/exclude")
 
 void setup_standard_excludes(struct dir_struct *dir)
 {
-       const char *path;
-
        dir->exclude_per_dir = ".gitignore";
 
        /* core.excludefile defaulting to $XDG_HOME/git/ignore */
@@ -2207,10 +2223,12 @@ void setup_standard_excludes(struct dir_struct *dir)
                                         dir->untracked ? &dir->ss_excludes_file : NULL);
 
        /* per repository user preference */
-       path = git_path_info_exclude();
-       if (!access_or_warn(path, R_OK, 0))
-               add_excludes_from_file_1(dir, path,
-                                        dir->untracked ? &dir->ss_info_exclude : NULL);
+       if (startup_info->have_repository) {
+               const char *path = git_path_info_exclude();
+               if (!access_or_warn(path, R_OK, 0))
+                       add_excludes_from_file_1(dir, path,
+                                                dir->untracked ? &dir->ss_info_exclude : NULL);
+       }
 }
 
 int remove_path(const char *name)
@@ -2365,7 +2383,7 @@ void write_untracked_extension(struct strbuf *out, struct untracked_cache *untra
 
        varint_len = encode_varint(untracked->ident.len, varbuf);
        strbuf_add(out, varbuf, varint_len);
-       strbuf_add(out, untracked->ident.buf, untracked->ident.len);
+       strbuf_addbuf(out, &untracked->ident);
 
        strbuf_add(out, ouc, ouc_size(len));
        free(ouc);
@@ -2706,3 +2724,40 @@ void untracked_cache_add_to_index(struct index_state *istate,
 {
        untracked_cache_invalidate_path(istate, path);
 }
+
+/* Update gitfile and core.worktree setting to connect work tree and git dir */
+void connect_work_tree_and_git_dir(const char *work_tree_, const char *git_dir_)
+{
+       struct strbuf file_name = STRBUF_INIT;
+       struct strbuf rel_path = STRBUF_INIT;
+       char *git_dir = real_pathdup(git_dir_, 1);
+       char *work_tree = real_pathdup(work_tree_, 1);
+
+       /* Update gitfile */
+       strbuf_addf(&file_name, "%s/.git", work_tree);
+       write_file(file_name.buf, "gitdir: %s",
+                  relative_path(git_dir, work_tree, &rel_path));
+
+       /* Update core.worktree setting */
+       strbuf_reset(&file_name);
+       strbuf_addf(&file_name, "%s/config", git_dir);
+       git_config_set_in_file(file_name.buf, "core.worktree",
+                              relative_path(work_tree, git_dir, &rel_path));
+
+       strbuf_release(&file_name);
+       strbuf_release(&rel_path);
+       free(work_tree);
+       free(git_dir);
+}
+
+/*
+ * Migrate the git directory of the given path from old_git_dir to new_git_dir.
+ */
+void relocate_gitdir(const char *path, const char *old_git_dir, const char *new_git_dir)
+{
+       if (rename(old_git_dir, new_git_dir) < 0)
+               die_errno(_("could not migrate git directory from '%s' to '%s'"),
+                       old_git_dir, new_git_dir);
+
+       connect_work_tree_and_git_dir(path, new_git_dir);
+}