A submodule's object database may be imported to in-core object pool
for a quick peek without paying the price of running a separate git
command. These databases are marked in for stricter checks later to
avoid accidentially refering to a submodule's SHA-1 from main repo
(except in gitlinks).
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@xxxxxxxxx>
---
cache.h | 4 +++-
environment.c | 2 ++
sha1_file.c | 38 +++++++++++++++++++++++++++++---------
submodule.c | 2 +-
4 files changed, 35 insertions(+), 11 deletions(-)
diff --git a/cache.h b/cache.h
index 92854ab..b8d5826 100644
--- a/cache.h
+++ b/cache.h
@@ -561,6 +561,7 @@ extern int fsync_object_files;
extern int core_preload_index;
extern int core_apply_sparse_checkout;
extern int precomposed_unicode;
+extern int object_database_contaminated;
enum branch_track {
BRANCH_TRACK_UNSPECIFIED = -1,
@@ -957,11 +958,12 @@ extern void remove_scheduled_dirs(void);
extern struct alternate_object_database {
struct alternate_object_database *next;
+ int external;
char *name;
char base[FLEX_ARRAY]; /* more */
} *alt_odb_list;
extern void prepare_alt_odb(void);
-extern void read_info_alternates(const char * relative_base, int depth);
+extern void read_external_info_alternates(const char * relative_base, int depth);
extern void add_to_alternates_file(const char *reference);
typedef int alt_odb_fn(struct alternate_object_database *, void *);
extern void foreach_alt_odb(alt_odb_fn, void*);
diff --git a/environment.c b/environment.c
index 85edd7f..3c90d95 100644
--- a/environment.c
+++ b/environment.c
@@ -65,6 +65,8 @@ unsigned long pack_size_limit_cfg;
/* Parallel index stat data preload? */
int core_preload_index = 0;
+int object_database_contaminated;
+
/* This is set by setup_git_dir_gently() and/or git_default_config() */
char *git_work_tree_cfg;
static char *work_tree;
diff --git a/sha1_file.c b/sha1_file.c
index afc7355..af71122 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -58,6 +58,9 @@ static struct cached_object empty_tree = {
static struct packed_git *last_found_pack;
+static void read_info_alternates(const char * relative_base,
+ int depth, int external);
+
static struct cached_object *find_cached_object(const unsigned char *sha1)
{
int i;
@@ -247,7 +250,10 @@ static int git_open_noatime(const char *name);
* SHA1, an extra slash for the first level indirection, and the
* terminating NUL.
*/
-static int link_alt_odb_entry(const char *entry, const char *relative_base, int depth)
+static int link_alt_odb_entry(const char *entry,
+ const char *relative_base,
+ int depth,
+ int external)
{
const char *objdir = get_object_directory();
struct alternate_object_database *ent;
@@ -277,6 +283,7 @@ static int link_alt_odb_entry(const char *entry, const char *relative_base, int
memcpy(ent->base, pathbuf.buf, pfxlen);
strbuf_release(&pathbuf);
+ ent->external = external;
ent->name = ent->base + pfxlen + 1;
ent->base[pfxlen + 3] = '/';
ent->base[pfxlen] = ent->base[entlen-1] = 0;
@@ -310,15 +317,19 @@ static int link_alt_odb_entry(const char *entry, const char *relative_base, int
ent->next = NULL;
/* recursively add alternates */
- read_info_alternates(ent->base, depth + 1);
+ read_info_alternates(ent->base, depth + 1, 0);
ent->base[pfxlen] = '/';
+ if (external)
+ object_database_contaminated = 1;
+
return 0;
}
static void link_alt_odb_entries(const char *alt, int len, int sep,
- const char *relative_base, int depth)
+ const char *relative_base,
+ int depth, int external)
{
struct string_list entries = STRING_LIST_INIT_NODUP;
char *alt_copy;
@@ -340,14 +351,16 @@ static void link_alt_odb_entries(const char *alt, int len, int sep,
error("%s: ignoring relative alternate object store %s",
relative_base, entry);
} else {
- link_alt_odb_entry(entry, relative_base, depth);
+ link_alt_odb_entry(entry, relative_base,
+ depth, external);
}
}
string_list_clear(&entries, 0);
free(alt_copy);
}
-void read_info_alternates(const char * relative_base, int depth)
+static void read_info_alternates(const char * relative_base,
+ int depth, int external)
{
char *map;
size_t mapsz;
@@ -371,11 +384,18 @@ void read_info_alternates(const char * relative_base, int depth)
map = xmmap(NULL, mapsz, PROT_READ, MAP_PRIVATE, fd, 0);
close(fd);
- link_alt_odb_entries(map, mapsz, '\n', relative_base, depth);
+ link_alt_odb_entries(map, mapsz, '\n', relative_base,
+ depth, external);
munmap(map, mapsz);
}
+void read_external_info_alternates(const char *relative_base,
+ int depth)
+{
+ read_info_alternates(relative_base, depth, 1);
+}
+
void add_to_alternates_file(const char *reference)
{
struct lock_file *lock = xcalloc(1, sizeof(struct lock_file));
@@ -385,7 +405,7 @@ void add_to_alternates_file(const char *reference)
if (commit_lock_file(lock))
die("could not close alternates file");
if (alt_odb_tail)
- link_alt_odb_entries(alt, strlen(alt), '\n', NULL, 0);
+ link_alt_odb_entries(alt, strlen(alt), '\n', NULL, 0, 0);
}
void foreach_alt_odb(alt_odb_fn fn, void *cb)
@@ -409,9 +429,9 @@ void prepare_alt_odb(void)
if (!alt) alt = "";
alt_odb_tail = &alt_odb_list;
- link_alt_odb_entries(alt, strlen(alt), PATH_SEP, NULL, 0);
+ link_alt_odb_entries(alt, strlen(alt), PATH_SEP, NULL, 0, 0);
- read_info_alternates(get_object_directory(), 0);
+ read_info_alternates(get_object_directory(), 0, 0);
}
static int has_loose_object_local(const unsigned char *sha1)
diff --git a/submodule.c b/submodule.c
index 2f55436..8e4e2ec 100644
--- a/submodule.c
+++ b/submodule.c
@@ -65,7 +65,7 @@ static int add_submodule_odb(const char *path)
alt_odb_list = alt_odb;
/* add possible alternates from the submodule */
- read_info_alternates(objects_directory.buf, 0);
+ read_external_info_alternates(objects_directory.buf, 0);
prepare_alt_odb();
done:
strbuf_release(&objects_directory);
--
1.8.0.rc3.18.g0d9b108
--
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