[PATCH] archimport: avoid committing on an Arch tag
[git.git] / fsck-cache.c
index eae73cc..e53d01a 100644 (file)
@@ -6,6 +6,8 @@
 #include "tree.h"
 #include "blob.h"
 #include "tag.h"
+#include "refs.h"
+#include "pack.h"
 
 #define REACHABLE 0x0001
 
@@ -14,6 +16,7 @@ static int show_tags = 0;
 static int show_unreachable = 0;
 static int standalone = 0;
 static int check_full = 0;
+static int check_strict = 0;
 static int keep_cache_objects = 0; 
 static unsigned char head_sha1[20];
 
@@ -106,13 +109,19 @@ static int verify_ordered(struct tree_entry_list *a, struct tree_entry_list *b)
 
 static int fsck_tree(struct tree *item)
 {
+       int retval;
        int has_full_path = 0;
+       int has_zero_pad = 0;
+       int has_bad_modes = 0;
+       int has_dup_entries = 0;
+       int not_properly_sorted = 0;
        struct tree_entry_list *entry, *last;
 
        last = NULL;
        for (entry = item->entries; entry; entry = entry->next) {
                if (strchr(entry->name, '/'))
                        has_full_path = 1;
+               has_zero_pad |= entry->zeropad;
 
                switch (entry->mode) {
                /*
@@ -129,24 +138,20 @@ static int fsck_tree(struct tree *item)
                 * bits..
                 */
                case S_IFREG | 0664:
-                       break;
+                       if (!check_strict)
+                               break;
                default:
-                       printf("tree %s has entry %o %s\n",
-                               sha1_to_hex(item->object.sha1),
-                               entry->mode, entry->name);
+                       has_bad_modes = 1;
                }
 
                if (last) {
                        switch (verify_ordered(last, entry)) {
                        case TREE_UNORDERED:
-                               fprintf(stderr, "tree %s not ordered\n",
-                                       sha1_to_hex(item->object.sha1));
-                               return -1;
+                               not_properly_sorted = 1;
+                               break;
                        case TREE_HAS_DUPS:
-                               fprintf(stderr, "tree %s has duplicate entries for '%s'\n",
-                                       sha1_to_hex(item->object.sha1),
-                                       entry->name);
-                               return -1;
+                               has_dup_entries = 1;
+                               break;
                        default:
                                break;
                        }
@@ -155,17 +160,54 @@ static int fsck_tree(struct tree *item)
                last = entry;
        }
 
+       retval = 0;
        if (has_full_path) {
                fprintf(stderr, "warning: git-fsck-cache: tree %s "
                        "has full pathnames in it\n", 
                        sha1_to_hex(item->object.sha1));
        }
-
-       return 0;
+       if (has_zero_pad) {
+               fprintf(stderr, "warning: git-fsck-cache: tree %s "
+                       "has zero-padded file modes in it\n",
+                       sha1_to_hex(item->object.sha1));
+       }
+       if (has_bad_modes) {
+               fprintf(stderr, "warning: git-fsck-cache: tree %s "
+                       "has bad file modes in it\n",
+                       sha1_to_hex(item->object.sha1));
+       }
+       if (has_dup_entries) {
+               fprintf(stderr, "error: git-fsck-cache: tree %s "
+                       "has duplicate file entries\n",
+                       sha1_to_hex(item->object.sha1));
+               retval = -1;
+       }
+       if (not_properly_sorted) {
+               fprintf(stderr, "error: git-fsck-cache: tree %s "
+                       "is not properly sorted\n",
+                       sha1_to_hex(item->object.sha1));
+               retval = -1;
+       }
+       return retval;
 }
 
 static int fsck_commit(struct commit *commit)
 {
+       char *buffer = commit->buffer;
+       unsigned char sha1[20];
+
+       if (memcmp(buffer, "tree ", 5))
+               return -1;
+       if (get_sha1_hex(buffer+5, sha1) || buffer[45] != '\n')
+               return -1;
+       buffer += 46;
+       while (!memcmp(buffer, "parent ", 7)) {
+               if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n')
+                       return -1;
+               buffer += 48;
+       }
+       if (memcmp(buffer, "author ", 7))
+               return -1;
        free(commit->buffer);
        commit->buffer = NULL;
        if (!commit->tree)
@@ -302,76 +344,32 @@ static int fsck_dir(int i, char *path)
        return 0;
 }
 
-static int read_sha1_reference(const char *path)
+static int default_refs = 0;
+
+static int fsck_handle_ref(const char *refname, const unsigned char *sha1)
 {
-       char hexname[60];
-       unsigned char sha1[20];
-       int fd = open(path, O_RDONLY), len;
        struct object *obj;
 
-       if (fd < 0)
-               return -1;
-
-       len = read(fd, hexname, sizeof(hexname));
-       close(fd);
-       if (len < 40)
-               return -1;
-
-       if (get_sha1_hex(hexname, sha1) < 0)
-               return -1;
-
        obj = lookup_object(sha1);
        if (!obj) {
-               if (!standalone && has_sha1_file(sha1))
-                       return 0; /* it is in pack */
-               return error("%s: invalid sha1 pointer %.40s", path, hexname);
+               if (!standalone && has_sha1_file(sha1)) {
+                       default_refs++;
+                       return 0; /* it is in a pack */
+               }
+               error("%s: invalid sha1 pointer %s", refname, sha1_to_hex(sha1));
+               /* We'll continue with the rest despite the error.. */
+               return 0;
        }
-
+       default_refs++;
        obj->used = 1;
        mark_reachable(obj, REACHABLE);
        return 0;
 }
 
-static int find_file_objects(const char *base, const char *name)
-{
-       int baselen = strlen(base);
-       int namelen = strlen(name);
-       char *path = xmalloc(baselen + namelen + 2);
-       struct stat st;
-
-       memcpy(path, base, baselen);
-       path[baselen] = '/';
-       memcpy(path + baselen + 1, name, namelen+1);
-       if (stat(path, &st) < 0)
-               return 0;
-
-       /*
-        * Recurse into directories
-        */
-       if (S_ISDIR(st.st_mode)) {
-               int count = 0;
-               DIR *dir = opendir(path);
-               if (dir) {
-                       struct dirent *de;
-                       while ((de = readdir(dir)) != NULL) {
-                               if (de->d_name[0] == '.')
-                                       continue;
-                               count += find_file_objects(path, de->d_name);
-                       }
-                       closedir(dir);
-               }
-               return count;
-       }
-       if (S_ISREG(st.st_mode))
-               return read_sha1_reference(path) == 0;
-       return 0;
-}
-
 static void get_default_heads(void)
 {
-       char *git_dir = gitenv(GIT_DIR_ENVIRONMENT) ? : DEFAULT_GIT_DIR_ENVIRONMENT;
-       int count = find_file_objects(git_dir, "refs");
-       if (!count)
+       for_each_ref(fsck_handle_ref);
+       if (!default_refs)
                die("No default references");
 }
 
@@ -386,6 +384,34 @@ static void fsck_object_dir(const char *path)
        fsck_sha1_list();
 }
 
+static int fsck_head_link(void)
+{
+       int fd, count;
+       char hex[40];
+       unsigned char sha1[20];
+       static char path[PATH_MAX], link[PATH_MAX];
+       const char *git_dir;
+
+       git_dir = gitenv(GIT_DIR_ENVIRONMENT);
+       if (!git_dir) git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
+
+       snprintf(path, sizeof(path), "%s/HEAD", git_dir);
+       if (readlink(path, link, sizeof(link)) < 0)
+               return error("HEAD is not a symlink");
+       if (strncmp("refs/heads/", link, 11))
+               return error("HEAD points to something strange (%s)", link);
+       fd = open(path, O_RDONLY);
+       if (fd < 0)
+               return error("HEAD: %s", strerror(errno));
+       count = read(fd, hex, sizeof(hex));
+       close(fd);
+       if (count < 0)
+               return error("HEAD: %s", strerror(errno));
+       if (count < 40 || get_sha1_hex(hex, sha1))
+               return error("HEAD: not a valid git pointer");
+       return 0;
+}
+
 int main(int argc, char **argv)
 {
        int i, heads;
@@ -417,26 +443,37 @@ int main(int argc, char **argv)
                        check_full = 1;
                        continue;
                }
+               if (!strcmp(arg, "--strict")) {
+                       check_strict = 1;
+                       continue;
+               }
                if (*arg == '-')
-                       usage("git-fsck-cache [--tags] [[--unreachable] [--cache] [--standalone | --full] <head-sha1>*]");
+                       usage("git-fsck-cache [--tags] [--root] [[--unreachable] [--cache] [--standalone | --full] [--strict] <head-sha1>*]");
        }
 
        if (standalone && check_full)
                die("Only one of --standalone or --full can be used.");
        if (standalone)
-               unsetenv("GIT_ALTERNATE_OBJECT_DIRECTORIES");
+               putenv("GIT_ALTERNATE_OBJECT_DIRECTORIES=");
 
+       fsck_head_link();
        fsck_object_dir(get_object_directory());
        if (check_full) {
-               int j;
+               struct alternate_object_database *alt;
                struct packed_git *p;
                prepare_alt_odb();
-               for (j = 0; alt_odb[j].base; j++) {
-                       alt_odb[j].name[-1] = 0; /* was slash */
-                       fsck_object_dir(alt_odb[j].base);
-                       alt_odb[j].name[-1] = '/';
+               for (alt = alt_odb_list; alt; alt = alt->next) {
+                       char namebuf[PATH_MAX];
+                       int namelen = alt->name - alt->base;
+                       memcpy(namebuf, alt->base, namelen);
+                       namebuf[namelen - 1] = 0;
+                       fsck_object_dir(namebuf);
                }
                prepare_packed_git();
+               for (p = packed_git; p; p = p->next)
+                       /* verify gives error messages itself */
+                       verify_pack(p, 0);
+
                for (p = packed_git; p; p = p->next) {
                        int num = num_packed_objects(p);
                        for (i = 0; i < num; i++) {