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Lua api for Snapshot and demo script
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Break out common `LLAppearanceMgr::wearOutfit(LLInventoryCategory*)` method
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Use LLSDParam<uuid_vec_t> in LLAppearanceListener::wearItems() and
detachItems() to build the vector of LLUUIDs from the passed LLSD array.
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Lua appearance listener
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into new private wearOutfit(LLInventoryCategory*) method.
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Use llsd::toMap() to return LLSD maps from "LLAppearance" listener.
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These encapsulate looping over a C++ iterable (be it a sequence container or
an associative container) and returning an LLSD array or map, respectively,
derived from the C++ container. By default, each C++ container item is
directly converted to LLSD.
Also make LLSDParam<LLSD> slightly more efficient by using
std::vector::emplace_back() instead of push_back(), which supports
std::vector<std::unique_ptr>, so we need not use std::shared_ptr.
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Add LuaAutorunPath, LuaCommandPath and LuaRequirePath settings.
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Passing std::string::c_str() to a (const std::string&) function parameter is
worse than clutter, it's pointless overhead: it forces the compiler to
construct a new std::string instance, instead of passing a const reference to
the one you already have in hand.
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Remove LL_TEST special case from require() code (to search in the viewer's
source tree). Instead, make llluamanager_test.cpp append to LuaRequirePath to
get the same effect.
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Streamline and robustify lua_emplace<T>() object cleanup.
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outfit items
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Remove AutorunLuaScriptFile and the LLLUAmanager::runScriptOnLogin() method
that checked it.
Instead, iterate over LuaAutorunPath directories at viewer startup, iterate
over *.lua files in each and implicitly run those.
LuaCommandPath and LuaRequirePath are not yet implemented.
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This is redundant (but harmless) on a Posix system, but it fills a missing
puzzle piece on Windows. The point of fsyspath is to be able to interchange
freely between fsyspath and std::string. Existing fsyspath could be
constructed and assigned from std::string, and we could explicitly call its
string() method to get a std::string, but an implicit fsyspath-to-string
conversion that worked on Posix would trip us up on Windows. Fix that.
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This replaces type_tag<T>(), which searched and possibly extended the type_tags
unordered_map at runtime. If we called lua_emplace<T>() from different threads,
that would require locking type_tags.
In contrast, the compiler must instantiate a distinct TypeTag<T> for every
distinct T passed to lua_emplace<T>(), so each gets a distinct value at static
initialization time. No locking is required; no lookup; no allocations.
Add a test to llluamanager_test.cpp to verify that each distinct T passed to
lua_emplace<T>() gets its own TypeTag<T>::value, and that each gets its own
destructor -- but that different lua_emplace<T>() calls with the same T share
the same TypeTag<T>::value and the same destructor.
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It turns out that Luau does not honor PUC-Rio Lua's __gc metafunction, so
despite elaborate measures, the previous lua_emplace<T>() implementation would
not have destroyed the contained C++ T object when the resulting userdata
object was garbage-collected.
Moreover, using LL.atexit() as the mechanism to destroy lua_emplace<T>()
userdata objects (e.g. LuaListener) would have been slightly fragile because
we also want to use LL.atexit() to make the final fiber.run() call, when
appropriate. Introducing an order dependency between fiber.run() and the
LuaListener destructor would not be robust.
Both of those problems are addressed by leveraging one of Luau's extensions
over PUC-Rio Lua. A Luau userdata object can have an int tag; and a tag can
have an associated C++ destructor function. When any userdata object bearing
that tag is garbage-collected, Luau will call that destructor; and Luau's
lua_close() function destroys all userdata objects.
The resulting lua_emplace<T>() and lua_toclass<T>() code is far simpler.
It only remains to generate a distinct int tag value for each different C++
type passed to the lua_emplace<T>() template.
unordered_map<std::type_index, int> addresses that need.
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Setting LOGTEST=DEBUG, when many unit/integration tests must be rebuilt and
run, can result in lots of unnecessary output. When we only want DEBUG log
output from a specific test program, make test.cpp recognize an environment
variable LOGTEST_testname, where 'testname' might be the full basename of the
executable, or part of INTEGRATION_TEST_testname or PROJECT_foo_TEST_testname.
When test.cpp notices a non-empty variable by that name, it behaves as if
LOGTEST were set to that value.
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UI-related Lua API work
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Add "userQuit" operation to LLAppViewerListener to engage
LLAppViewer::userQuit(), which pops up "Are you sure?" prompt unless
suppressed.
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Add nearby chat listener
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Use ClassName(ctor args) for classes using util.classctor().
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