* The original .uproject file is now compiled into monolithic executables when Live Coding is enabled. This allows invoking UBT with the original project file when the executable is staged to a different directory. This parameter can be overriden via the LiveCoding.SourceProject cvar.
* The original engine directory is also compiled into the executable. This allows finding the console executable path without having to enter it manually via the LiveCoding.ConsolePath cvar.
* If an exact match for a binary filename is not found, try to find a match by name only. Also required to support staged builds for 'Launch On', etc...
* Add a LiveCoding.Compile command to trigger a compile from the console.
#rb none
#jira UE-72677
#jira UE-72678
#jira UE-72683
[CL 6625676 by Ben Marsh in Dev-Build branch]
Live++ reads object files at startup for game modules, and assigns unique ids to each compiland (used to disambiguate static variables). When compiling the patch, these compilands are modified to reference a unique id for the unity blob, causing the variables to be reconstructed.
Solution is to generate a JSON file to each output directory containing object files containing the mapping, and to use that to assign compiland ids at startup.
#rb none
#jira UE-74036
[CL 6453851 by Ben Marsh in Dev-Build branch]
These variables (and their dynamic initializers) were being treated as new, rather than being linked back to their original instances. UBT now outputs a mapping of object files to their original unity object file during a live coding compile, which allows Live++ to disambiguate between new and reconstructed instances.
#rb none
[CL 5988834 by Ben Marsh in Dev-Build branch]
Now stores the linker environment block in the live coding manifest, and adds it to the cache before executing the linker.
#rb none
#jira UE-72324
#ROBOMERGE-OWNER: ben.marsh
#ROBOMERGE-AUTHOR: ben.marsh
#ROBOMERGE-SOURCE: CL 5740602 in //UE4/Release-4.22/... via CL 5740765
#ROBOMERGE-BOT: BUILD (Main -> Dev-Build)
[CL 5743848 by ben marsh in Dev-Build branch]
Allows fast iteration of C++ changes without restarting the application. To use, select the "Live Coding (Experimental)" mode from the drop down menu next to the editor's compile button, or type "LiveCoding" into the console for a monolithic build. Press Ctrl+Alt+F11 to find changes and compile.
Changes vs standalone Live++ version:
* UBT is used to execute builds. This allows standard UE4 adaptive unity mode, allows us to reuse object files when we do regular builds, supports using any build executor allowed by UBT (XGE, SNDBS, etc..).
* Adding new source files is supported.
* Custom visualizer for FNames is supported via a weakly linked symbol in a static library (Engine/Extras/NatvisHelpers).
* Settings are exposed in the editor's project settings dialog.
* Standalone application has been rewritten as a Slate app ("LiveCodingConsole"). There is an additional option to start the program as hidden, where it will not be visible until Ctrl+Alt+F11 is hit. Similarly, closing the window will hide it instead of closing the application.
* Does not require a standalone licensed version of Live++.
Known issues:
* Does not currently support class layout changes / object reinstancing
#rb none
[FYI] Marc.Audy, Stefan.Boberg, Nick.Penwarden
#jira
#ROBOMERGE-OWNER: ben.marsh
#ROBOMERGE-AUTHOR: ben.marsh
#ROBOMERGE-SOURCE: CL 5304722 in //UE4/Release-4.22/... via CL 5309051
#ROBOMERGE-BOT: BUILD (Main -> Dev-Build)
[CL 5325555 by ben marsh in Dev-Build branch]
