git-tar-tree: no more void pointer arithmetic
[git.git] / builtin-ls-files.c
index 3a0c5f2..8dae9f7 100644 (file)
@@ -5,24 +5,21 @@
  *
  * Copyright (C) Linus Torvalds, 2005
  */
-#include <dirent.h>
 #include <fnmatch.h>
 
 #include "cache.h"
 #include "quote.h"
+#include "dir.h"
 #include "builtin.h"
 
 static int abbrev = 0;
 static int show_deleted = 0;
 static int show_cached = 0;
 static int show_others = 0;
-static int show_ignored = 0;
 static int show_stage = 0;
 static int show_unmerged = 0;
 static int show_modified = 0;
 static int show_killed = 0;
-static int show_other_directories = 0;
-static int hide_empty_directories = 0;
 static int show_valid_bit = 0;
 static int line_terminator = '\n';
 
@@ -39,309 +36,6 @@ static const char *tag_other = "";
 static const char *tag_killed = "";
 static const char *tag_modified = "";
 
-static const char *exclude_per_dir = NULL;
-
-/* We maintain three exclude pattern lists:
- * EXC_CMDL lists patterns explicitly given on the command line.
- * EXC_DIRS lists patterns obtained from per-directory ignore files.
- * EXC_FILE lists patterns from fallback ignore files.
- */
-#define EXC_CMDL 0
-#define EXC_DIRS 1
-#define EXC_FILE 2
-static struct exclude_list {
-       int nr;
-       int alloc;
-       struct exclude {
-               const char *pattern;
-               const char *base;
-               int baselen;
-       } **excludes;
-} exclude_list[3];
-
-static void add_exclude(const char *string, const char *base,
-                       int baselen, struct exclude_list *which)
-{
-       struct exclude *x = xmalloc(sizeof (*x));
-
-       x->pattern = string;
-       x->base = 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[which->nr++] = x;
-}
-
-static int add_excludes_from_file_1(const char *fname,
-                                   const char *base,
-                                   int baselen,
-                                   struct exclude_list *which)
-{
-       int fd, i;
-       long size;
-       char *buf, *entry;
-
-       fd = open(fname, O_RDONLY);
-       if (fd < 0)
-               goto err;
-       size = lseek(fd, 0, SEEK_END);
-       if (size < 0)
-               goto err;
-       lseek(fd, 0, SEEK_SET);
-       if (size == 0) {
-               close(fd);
-               return 0;
-       }
-       buf = xmalloc(size+1);
-       if (read(fd, buf, size) != size)
-               goto err;
-       close(fd);
-
-       buf[size++] = '\n';
-       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;
-
- err:
-       if (0 <= fd)
-               close(fd);
-       return -1;
-}
-
-static void add_excludes_from_file(const char *fname)
-{
-       if (add_excludes_from_file_1(fname, "", 0,
-                                    &exclude_list[EXC_FILE]) < 0)
-               die("cannot use %s as an exclude file", fname);
-}
-
-static int push_exclude_per_directory(const char *base, int baselen)
-{
-       char exclude_file[PATH_MAX];
-       struct exclude_list *el = &exclude_list[EXC_DIRS];
-       int current_nr = el->nr;
-
-       if (exclude_per_dir) {
-               memcpy(exclude_file, base, baselen);
-               strcpy(exclude_file + baselen, exclude_per_dir);
-               add_excludes_from_file_1(exclude_file, base, baselen, el);
-       }
-       return current_nr;
-}
-
-static void pop_exclude_per_directory(int stk)
-{
-       struct exclude_list *el = &exclude_list[EXC_DIRS];
-
-       while (stk < el->nr)
-               free(el->excludes[--el->nr]);
-}
-
-/* Scan the list and let the last match determines the fate.
- * Return 1 for exclude, 0 for include and -1 for undecided.
- */
-static int excluded_1(const char *pathname,
-                     int pathlen,
-                     struct exclude_list *el)
-{
-       int i;
-
-       if (el->nr) {
-               for (i = el->nr - 1; 0 <= i; i--) {
-                       struct exclude *x = el->excludes[i];
-                       const char *exclude = x->pattern;
-                       int to_exclude = 1;
-
-                       if (*exclude == '!') {
-                               to_exclude = 0;
-                               exclude++;
-                       }
-
-                       if (!strchr(exclude, '/')) {
-                               /* match basename */
-                               const char *basename = strrchr(pathname, '/');
-                               basename = (basename) ? basename+1 : pathname;
-                               if (fnmatch(exclude, basename, 0) == 0)
-                                       return to_exclude;
-                       }
-                       else {
-                               /* match with FNM_PATHNAME:
-                                * exclude has base (baselen long) implicitly
-                                * in front of it.
-                                */
-                               int baselen = x->baselen;
-                               if (*exclude == '/')
-                                       exclude++;
-
-                               if (pathlen < baselen ||
-                                   (baselen && pathname[baselen-1] != '/') ||
-                                   strncmp(pathname, x->base, baselen))
-                                   continue;
-
-                               if (fnmatch(exclude, pathname+baselen,
-                                           FNM_PATHNAME) == 0)
-                                       return to_exclude;
-                       }
-               }
-       }
-       return -1; /* undecided */
-}
-
-static int excluded(const char *pathname)
-{
-       int pathlen = strlen(pathname);
-       int st;
-
-       for (st = EXC_CMDL; st <= EXC_FILE; st++) {
-               switch (excluded_1(pathname, pathlen, &exclude_list[st])) {
-               case 0:
-                       return 0;
-               case 1:
-                       return 1;
-               }
-       }
-       return 0;
-}
-
-struct nond_on_fs {
-       int len;
-       char name[FLEX_ARRAY]; /* more */
-};
-
-static struct nond_on_fs **dir;
-static int nr_dir;
-static int dir_alloc;
-
-static void add_name(const char *pathname, int len)
-{
-       struct nond_on_fs *ent;
-
-       if (cache_name_pos(pathname, len) >= 0)
-               return;
-
-       if (nr_dir == dir_alloc) {
-               dir_alloc = alloc_nr(dir_alloc);
-               dir = xrealloc(dir, dir_alloc*sizeof(ent));
-       }
-       ent = xmalloc(sizeof(*ent) + len + 1);
-       ent->len = len;
-       memcpy(ent->name, pathname, len);
-       ent->name[len] = 0;
-       dir[nr_dir++] = ent;
-}
-
-static int dir_exists(const char *dirname, int len)
-{
-       int pos = cache_name_pos(dirname, len);
-       if (pos >= 0)
-               return 1;
-       pos = -pos-1;
-       if (pos >= active_nr) /* can't */
-               return 0;
-       return !strncmp(active_cache[pos]->name, dirname, len);
-}
-
-/*
- * 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(const char *path, const char *base, int baselen)
-{
-       DIR *fdir = opendir(path);
-       int contents = 0;
-
-       if (fdir) {
-               int exclude_stk;
-               struct dirent *de;
-               char fullname[MAXPATHLEN + 1];
-               memcpy(fullname, base, baselen);
-
-               exclude_stk = push_exclude_per_directory(base, baselen);
-
-               while ((de = readdir(fdir)) != NULL) {
-                       int len;
-
-                       if ((de->d_name[0] == '.') &&
-                           (de->d_name[1] == 0 ||
-                            !strcmp(de->d_name + 1, ".") ||
-                            !strcmp(de->d_name + 1, "git")))
-                               continue;
-                       len = strlen(de->d_name);
-                       memcpy(fullname + baselen, de->d_name, len+1);
-                       if (excluded(fullname) != show_ignored) {
-                               if (!show_ignored || DTYPE(de) != DT_DIR) {
-                                       continue;
-                               }
-                       }
-
-                       switch (DTYPE(de)) {
-                       struct stat st;
-                       int subdir, rewind_base;
-                       default:
-                               continue;
-                       case DT_UNKNOWN:
-                               if (lstat(fullname, &st))
-                                       continue;
-                               if (S_ISREG(st.st_mode) || S_ISLNK(st.st_mode))
-                                       break;
-                               if (!S_ISDIR(st.st_mode))
-                                       continue;
-                               /* fallthrough */
-                       case DT_DIR:
-                               memcpy(fullname + baselen + len, "/", 2);
-                               len++;
-                               rewind_base = nr_dir;
-                               subdir = read_directory(fullname, fullname,
-                                                       baselen + len);
-                               if (show_other_directories &&
-                                   (subdir || !hide_empty_directories) &&
-                                   !dir_exists(fullname, baselen + len)) {
-                                       // Rewind the read subdirectory
-                                       while (nr_dir > rewind_base)
-                                               free(dir[--nr_dir]);
-                                       break;
-                               }
-                               contents += subdir;
-                               continue;
-                       case DT_REG:
-                       case DT_LNK:
-                               break;
-                       }
-                       add_name(fullname, baselen + len);
-                       contents++;
-               }
-               closedir(fdir);
-
-               pop_exclude_per_directory(exclude_stk);
-       }
-
-       return contents;
-}
-
-static int cmp_name(const void *p1, const void *p2)
-{
-       const struct nond_on_fs *e1 = *(const struct nond_on_fs **)p1;
-       const struct nond_on_fs *e2 = *(const struct nond_on_fs **)p2;
-
-       return cache_name_compare(e1->name, e1->len,
-                                 e2->name, e2->len);
-}
 
 /*
  * Match a pathspec against a filename. The first "len" characters
@@ -378,7 +72,7 @@ static int match(const char **spec, char *ps_matched,
        return 0;
 }
 
-static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
+static void show_dir_entry(const char *tag, struct dir_entry *ent)
 {
        int len = prefix_len;
        int offset = prefix_offset;
@@ -394,14 +88,14 @@ static void show_dir_entry(const char *tag, struct nond_on_fs *ent)
        putchar(line_terminator);
 }
 
-static void show_other_files(void)
+static void show_other_files(struct dir_struct *dir)
 {
        int i;
-       for (i = 0; i < nr_dir; i++) {
+       for (i = 0; i < dir->nr; i++) {
                /* We should not have a matching entry, but we
                 * may have an unmerged entry for this path.
                 */
-               struct nond_on_fs *ent = dir[i];
+               struct dir_entry *ent = dir->entries[i];
                int pos = cache_name_pos(ent->name, ent->len);
                struct cache_entry *ce;
                if (0 <= pos)
@@ -417,11 +111,11 @@ static void show_other_files(void)
        }
 }
 
-static void show_killed_files(void)
+static void show_killed_files(struct dir_struct *dir)
 {
        int i;
-       for (i = 0; i < nr_dir; i++) {
-               struct nond_on_fs *ent = dir[i];
+       for (i = 0; i < dir->nr; i++) {
+               struct dir_entry *ent = dir->entries[i];
                char *cp, *sp;
                int pos, len, killed = 0;
 
@@ -462,7 +156,7 @@ static void show_killed_files(void)
                        }
                }
                if (killed)
-                       show_dir_entry(tag_killed, dir[i]);
+                       show_dir_entry(tag_killed, dir->entries[i]);
        }
 }
 
@@ -513,7 +207,7 @@ static void show_ce_entry(const char *tag, struct cache_entry *ce)
        }
 }
 
-static void show_files(void)
+static void show_files(struct dir_struct *dir)
 {
        int i;
 
@@ -522,39 +216,18 @@ static void show_files(void)
                const char *path = ".", *base = "";
                int baselen = prefix_len;
 
-               if (baselen) {
+               if (baselen)
                        path = base = prefix;
-                       if (exclude_per_dir) {
-                               char *p, *pp = xmalloc(baselen+1);
-                               memcpy(pp, prefix, baselen+1);
-                               p = pp;
-                               while (1) {
-                                       char save = *p;
-                                       *p = 0;
-                                       push_exclude_per_directory(pp, p-pp);
-                                       *p++ = save;
-                                       if (!save)
-                                               break;
-                                       p = strchr(p, '/');
-                                       if (p)
-                                               p++;
-                                       else
-                                               p = pp + baselen;
-                               }
-                               free(pp);
-                       }
-               }
-               read_directory(path, base, baselen);
-               qsort(dir, nr_dir, sizeof(struct nond_on_fs *), cmp_name);
+               read_directory(dir, path, base, baselen);
                if (show_others)
-                       show_other_files();
+                       show_other_files(dir);
                if (show_killed)
-                       show_killed_files();
+                       show_killed_files(dir);
        }
        if (show_cached | show_stage) {
                for (i = 0; i < active_nr; i++) {
                        struct cache_entry *ce = active_cache[i];
-                       if (excluded(ce->name) != show_ignored)
+                       if (excluded(dir, ce->name) != dir->show_ignored)
                                continue;
                        if (show_unmerged && !ce_stage(ce))
                                continue;
@@ -566,7 +239,7 @@ static void show_files(void)
                        struct cache_entry *ce = active_cache[i];
                        struct stat st;
                        int err;
-                       if (excluded(ce->name) != show_ignored)
+                       if (excluded(dir, ce->name) != dir->show_ignored)
                                continue;
                        err = lstat(ce->name, &st);
                        if (show_deleted && err)
@@ -653,7 +326,9 @@ int cmd_ls_files(int argc, const char **argv, char** envp)
 {
        int i;
        int exc_given = 0;
+       struct dir_struct dir;
 
+       memset(&dir, 0, sizeof(dir));
        prefix = setup_git_directory();
        if (prefix)
                prefix_offset = strlen(prefix);
@@ -698,7 +373,7 @@ int cmd_ls_files(int argc, const char **argv, char** envp)
                        continue;
                }
                if (!strcmp(arg, "-i") || !strcmp(arg, "--ignored")) {
-                       show_ignored = 1;
+                       dir.show_ignored = 1;
                        continue;
                }
                if (!strcmp(arg, "-s") || !strcmp(arg, "--stage")) {
@@ -710,11 +385,11 @@ int cmd_ls_files(int argc, const char **argv, char** envp)
                        continue;
                }
                if (!strcmp(arg, "--directory")) {
-                       show_other_directories = 1;
+                       dir.show_other_directories = 1;
                        continue;
                }
                if (!strcmp(arg, "--no-empty-directory")) {
-                       hide_empty_directories = 1;
+                       dir.hide_empty_directories = 1;
                        continue;
                }
                if (!strcmp(arg, "-u") || !strcmp(arg, "--unmerged")) {
@@ -727,27 +402,27 @@ int cmd_ls_files(int argc, const char **argv, char** envp)
                }
                if (!strcmp(arg, "-x") && i+1 < argc) {
                        exc_given = 1;
-                       add_exclude(argv[++i], "", 0, &exclude_list[EXC_CMDL]);
+                       add_exclude(argv[++i], "", 0, &dir.exclude_list[EXC_CMDL]);
                        continue;
                }
                if (!strncmp(arg, "--exclude=", 10)) {
                        exc_given = 1;
-                       add_exclude(arg+10, "", 0, &exclude_list[EXC_CMDL]);
+                       add_exclude(arg+10, "", 0, &dir.exclude_list[EXC_CMDL]);
                        continue;
                }
                if (!strcmp(arg, "-X") && i+1 < argc) {
                        exc_given = 1;
-                       add_excludes_from_file(argv[++i]);
+                       add_excludes_from_file(&dir, argv[++i]);
                        continue;
                }
                if (!strncmp(arg, "--exclude-from=", 15)) {
                        exc_given = 1;
-                       add_excludes_from_file(arg+15);
+                       add_excludes_from_file(&dir, arg+15);
                        continue;
                }
                if (!strncmp(arg, "--exclude-per-directory=", 24)) {
                        exc_given = 1;
-                       exclude_per_dir = arg + 24;
+                       dir.exclude_per_dir = arg + 24;
                        continue;
                }
                if (!strcmp(arg, "--full-name")) {
@@ -789,7 +464,7 @@ int cmd_ls_files(int argc, const char **argv, char** envp)
                ps_matched = xcalloc(1, num);
        }
 
-       if (show_ignored && !exc_given) {
+       if (dir.show_ignored && !exc_given) {
                fprintf(stderr, "%s: --ignored needs some exclude pattern\n",
                        argv[0]);
                exit(1);
@@ -803,7 +478,7 @@ int cmd_ls_files(int argc, const char **argv, char** envp)
        read_cache();
        if (prefix)
                prune_cache();
-       show_files();
+       show_files(&dir);
 
        if (ps_matched) {
                /* We need to make sure all pathspec matched otherwise