Since the secondary indexes order will be able to depend on
the order in the primary index, we need to rebuild them if the
primary index was changed.

Only non-unique tree indexes depend on the primary index, so rebuild
only non-unique tree indexes.

Add a test.

Needed for #2476

In the following patch I will need to alter struct alter_space
in AlterSpaceOp constructor. Pass alter_space in.

auth.test.lua was not converted to the new box.cfg{} options
and was printing warnings to stdout, which would confuse the
built-in tap detector in the harness.

Clean up everything after the test.

Fixes #2673

VinylIndex may be freed before vinyl iterator has been closed. Vinyl
iterator uses only an `env` item from corresponding VinylIndex, so store
environment pointer for iterators for direct use.

See #2673

vy_index may be deleted when cursor still exists, so reference
vy_index for cursor lifetime.

See #2673

Implement vy_cache_iterator_step, add comments.

Cache_iterator_next_key returns the same tuple as on previous step
if the cache version was changed.

Closes #2661

Mixing C-style error handling and C++ exceptions can lead to
serious problems.

In context of #910

Needed for #910

Get rid of unprotected usage of Lua API.

Needed for #910

Needed for #910

Optimize error_log(diag_last_error(diag_get())) pattern.

Create memtx format format in memtx engine, and vinyl format in vinyl
engine.
This is a pre-requisite patch for gh-2476 (predictable memtx tree
iteration).

The space may have a state, we should commit alter of the new space object,
not old one.

We can always use disk_format, in case of a single key space
it is identical to mem_format.

Add xlog_cursor crc, meta parsnig and reading error injections.
Add vy run data reading injection, forward injection from vy run data
reading to xlog.
See #1610

Fixes gh-2660.

Perserve triggers during truncate and rollback.

A test case to follow in a separate commit.

Fix inaccurate patching by ed412cd9 commit in LuaJIT.

Add an option to enable LuaJIT's GC64 mode and enable this option
by default on OS X.

Closes #2643

LuaJIT has some configuration flags which can be switched via
-DLUAJIT_USE_OPTION defines, e.g. USE_ASAN or USE_VALGRIND.
Before this patch these definitions were added by CMake to XCFLAGS
variable and passed to LuaJIT's Makefile. However, some of these
flags also affect the content of lj_xxx.h internal header files,
which were included by Tarantool (see utils.c) and compiled WITHOUT
proper flags. This situation might lead to inconsistent ABI between
compiled libluajit.a and Tarantool.

This patch adds all LUAJIT_USE_XXX defines to CMake's COMPILE_FLAGS
in order to enable these flags globally, then parses COMPILE_FLAGS
and adds them to LuaJIT's XCFLAGS.

Needed for #2643

Make tuple_format referencing API similar to other refable objects.

Rename vy_index membes, add comments.

Move a comment. Now that the index def list is ordered, we don't have to
treat the primary key in a special way.

Preserve the primary key position (first) in the index def list
when creating a list of index definitions during alter.

This simplifies the code in space_new() and down the call stack
and makes it easier to remove space->format.

We plan to remove space->format altogether and store it in the engine.
This is a preparatory patch.

Get rid of struct space dependency in vy_index.

Needed for unit tests.

In context of #2090

Needed for unit tests.

In context of #2090

If the iterator type is ITER_LE and a run_iterator can not find
a start page (all page min_keys are >= select key), it would
iterate over all pages starting from the last.

Fix it by setting search_ended flag at the page search phase, before
calling next_key.

Closes #2614

And fix a bug in vy_cache_iterator_restore, which could ignore
restore to a previous statement.

Needed for #2614

Implement box.session.type() which returns one of the:
applier, background, repl, console, binary, depending on the
source of box queries.

Add tests.

cfg_XXX() methods must not be used outside vy_conf.

Follow up #2253

Re-create .index files in case of vy_run_recover error().
Old file will be deleted and a new index file will be created.

Closes #2253
Closes #2395

recover_remaining_wals() doesn't proceed to the next xlog until the
current one is finalized (EOF marker is written). As a result, if an
xlog wasn't finalized for some reason (IO error occurred or tarantool
was killed in cold blood with SIGKILL), replication will stall on the
unfinished xlog forever.

To preclude that, let's differentiate WAL write and rotation in WAL
watcher and force recover_remaining_wals() rescan the WAL directory on
any WAL rotation so that it will continue to the next WAL even if the
current one wasn't properly finalized. In case of hot standby, we can't
reliably detect WAL rotation (e.g. on Mac OS inotify may not work) so
also rescan the WAL directory every wal_dir_rescan_delay seconds.

Closes #2294

 - Handle cord_costart() errors properly.
 - Don't use scoped_guard as we don't actually need it there.
 - Drop relay_destroy() and rename relay_create() to relay_init().

Instead of notifying relay about new WALs with ev_async, establish a
cbus connection between WAL and each relay and send cbus messages after
wal_write. This is more flexible, because unlike ev_async we can pass
extra information along with cbus messages, e.g. LSN or event mask.

Closes #2275