fsck: complain when .gitmodules is a symlink
[gitweb.git] / fsck.c
diff --git a/fsck.c b/fsck.c
index 032699e9ac2622c7d089523a456db0fa83310e14..9339f315131786c50c9fa10dd702fe20562e167e 100644 (file)
--- a/fsck.c
+++ b/fsck.c
 #include "utf8.h"
 #include "sha1-array.h"
 #include "decorate.h"
+#include "oidset.h"
+#include "packfile.h"
+#include "submodule-config.h"
+#include "config.h"
+
+static struct oidset gitmodules_found = OIDSET_INIT;
+static struct oidset gitmodules_done = OIDSET_INIT;
 
 #define FSCK_FATAL -1
 #define FSCK_INFO -2
@@ -44,6 +51,7 @@
        FUNC(MISSING_TAG_ENTRY, ERROR) \
        FUNC(MISSING_TAG_OBJECT, ERROR) \
        FUNC(MISSING_TREE, ERROR) \
+       FUNC(MISSING_TREE_OBJECT, ERROR) \
        FUNC(MISSING_TYPE, ERROR) \
        FUNC(MISSING_TYPE_ENTRY, ERROR) \
        FUNC(MULTIPLE_AUTHORS, ERROR) \
        FUNC(TREE_NOT_SORTED, ERROR) \
        FUNC(UNKNOWN_TYPE, ERROR) \
        FUNC(ZERO_PADDED_DATE, ERROR) \
+       FUNC(GITMODULES_MISSING, ERROR) \
+       FUNC(GITMODULES_BLOB, ERROR) \
+       FUNC(GITMODULES_PARSE, ERROR) \
+       FUNC(GITMODULES_NAME, ERROR) \
+       FUNC(GITMODULES_SYMLINK, ERROR) \
        /* warnings */ \
        FUNC(BAD_FILEMODE, WARN) \
        FUNC(EMPTY_NAME, WARN) \
@@ -561,10 +574,18 @@ static int fsck_tree(struct tree *item, struct fsck_options *options)
                has_empty_name |= !*name;
                has_dot |= !strcmp(name, ".");
                has_dotdot |= !strcmp(name, "..");
-               has_dotgit |= (!strcmp(name, ".git") ||
-                              is_hfs_dotgit(name) ||
-                              is_ntfs_dotgit(name));
+               has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name);
                has_zero_pad |= *(char *)desc.buffer == '0';
+
+               if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name)) {
+                       if (!S_ISLNK(mode))
+                               oidset_insert(&gitmodules_found, oid);
+                       else
+                               retval += report(options, &item->object,
+                                                FSCK_MSG_GITMODULES_SYMLINK,
+                                                ".gitmodules is a symbolic link");
+               }
+
                if (update_tree_entry_gently(&desc)) {
                        retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree");
                        break;
@@ -821,7 +842,7 @@ static int fsck_tag_buffer(struct tag *tag, const char *data,
                        ret = report(options, &tag->object,
                                FSCK_MSG_TAG_OBJECT_NOT_TAG,
                                "expected tag got %s",
-                           typename(type));
+                           type_name(type));
                        goto done;
                }
        }
@@ -901,6 +922,66 @@ static int fsck_tag(struct tag *tag, const char *data,
        return fsck_tag_buffer(tag, data, size, options);
 }
 
+struct fsck_gitmodules_data {
+       struct object *obj;
+       struct fsck_options *options;
+       int ret;
+};
+
+static int fsck_gitmodules_fn(const char *var, const char *value, void *vdata)
+{
+       struct fsck_gitmodules_data *data = vdata;
+       const char *subsection, *key;
+       int subsection_len;
+       char *name;
+
+       if (parse_config_key(var, "submodule", &subsection, &subsection_len, &key) < 0 ||
+           !subsection)
+               return 0;
+
+       name = xmemdupz(subsection, subsection_len);
+       if (check_submodule_name(name) < 0)
+               data->ret |= report(data->options, data->obj,
+                                   FSCK_MSG_GITMODULES_NAME,
+                                   "disallowed submodule name: %s",
+                                   name);
+       free(name);
+
+       return 0;
+}
+
+static int fsck_blob(struct blob *blob, const char *buf,
+                    unsigned long size, struct fsck_options *options)
+{
+       struct fsck_gitmodules_data data;
+
+       if (!oidset_contains(&gitmodules_found, &blob->object.oid))
+               return 0;
+       oidset_insert(&gitmodules_done, &blob->object.oid);
+
+       if (!buf) {
+               /*
+                * A missing buffer here is a sign that the caller found the
+                * blob too gigantic to load into memory. Let's just consider
+                * that an error.
+                */
+               return report(options, &blob->object,
+                             FSCK_MSG_GITMODULES_PARSE,
+                             ".gitmodules too large to parse");
+       }
+
+       data.obj = &blob->object;
+       data.options = options;
+       data.ret = 0;
+       if (git_config_from_mem(fsck_gitmodules_fn, CONFIG_ORIGIN_BLOB,
+                               ".gitmodules", buf, size, &data))
+               data.ret |= report(options, &blob->object,
+                                  FSCK_MSG_GITMODULES_PARSE,
+                                  "could not parse gitmodules blob");
+
+       return data.ret;
+}
+
 int fsck_object(struct object *obj, void *data, unsigned long size,
        struct fsck_options *options)
 {
@@ -908,7 +989,7 @@ int fsck_object(struct object *obj, void *data, unsigned long size,
                return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck");
 
        if (obj->type == OBJ_BLOB)
-               return 0;
+               return fsck_blob((struct blob *)obj, data, size, options);
        if (obj->type == OBJ_TREE)
                return fsck_tree((struct tree *) obj, options);
        if (obj->type == OBJ_COMMIT)
@@ -932,3 +1013,52 @@ int fsck_error_function(struct fsck_options *o,
        error("object %s: %s", describe_object(o, obj), message);
        return 1;
 }
+
+int fsck_finish(struct fsck_options *options)
+{
+       int ret = 0;
+       struct oidset_iter iter;
+       const struct object_id *oid;
+
+       oidset_iter_init(&gitmodules_found, &iter);
+       while ((oid = oidset_iter_next(&iter))) {
+               struct blob *blob;
+               enum object_type type;
+               unsigned long size;
+               char *buf;
+
+               if (oidset_contains(&gitmodules_done, oid))
+                       continue;
+
+               blob = lookup_blob(oid);
+               if (!blob) {
+                       ret |= report(options, &blob->object,
+                                     FSCK_MSG_GITMODULES_BLOB,
+                                     "non-blob found at .gitmodules");
+                       continue;
+               }
+
+               buf = read_sha1_file(oid->hash, &type, &size);
+               if (!buf) {
+                       if (is_promisor_object(&blob->object.oid))
+                               continue;
+                       ret |= report(options, &blob->object,
+                                     FSCK_MSG_GITMODULES_MISSING,
+                                     "unable to read .gitmodules blob");
+                       continue;
+               }
+
+               if (type == OBJ_BLOB)
+                       ret |= fsck_blob(blob, buf, size, options);
+               else
+                       ret |= report(options, &blob->object,
+                                     FSCK_MSG_GITMODULES_BLOB,
+                                     "non-blob found at .gitmodules");
+               free(buf);
+       }
+
+
+       oidset_clear(&gitmodules_found);
+       oidset_clear(&gitmodules_done);
+       return ret;
+}