Command line can't be longer than 32,768 characters (maybe just on Windows?)

[Kerbas-ad-astra]

I was chasing down some other errors when I discovered that KSPBurst wasn't compiling because I had too many plugins, pushing the total command line passed to the compiler (with all the --root-assembly and --assembly-folder flags) past 2^15. There's probably nothing to be done except get picky when the mod count climbs past 200, but I figured I'd toss this out here in case anyone has ideas.

A few modest proposals:

• Somehow abbreviate the flags to e.g. "root-asm" and "asm-fldr"?
• Move the working directory to GameData so all those "GameData\" bits can go away?
• Encourage mod authors to use shorter file and folder names, and to compile their code into fewer DLLs? 8.3 should be enough for anyone 😉
• Only compile those assemblies that actually call for KSPBurst? (I have zero idea if this is even possible.)
• Move my gaming PC over to Linux already?

[NihilEntropy]

I think this formula would be useful (8191 - c) / 43.06 > n mods, this gives you less than 190 mods.

8191 - character limit for cmd
43.06 - average folder directory size in my 210 size modpack
c - some constant number of characters that make up the sum between other parameters passed to KSPBurst minus whatever mods you will remove but note as in my case more important mods tend to have longer names so average removal is less than 43.06.

*1 mod folder can mean N Burst assemblies

Given that I got it to work with 189 mods it isn't a perfect formula, some mods have more than 1 mod and KSPBurst parameters can vary I think so I made the adjustment if you have long cmd on maybe 32767 for the limit.

(BTW I know nothing, just trying to get modded KSP to run with <64 gigs of ram)

Here is a python program I burned a forest down for that checks for if you are under the limit or not. Don't just run it, read it, you don't know me, always check (safety comes first so sorry for posting something but thought it would be helpful).

[JonnyOThan]

It may be possible to use a response file....I see some stuff related to that in the unity package.

[JonnyOThan]

Also seems like we could save a lot of space by collapsing the compilation defines:

--compilation-defines=VALUE
                             Compilation defines to use for building (seperated
                               by ;)  e.g. UNITY_2020_1;NET_2_0

[JonnyOThan]

Passing a filepath starting with @ to BCL.exe does seem to convince it to read the file, but something is going weird:

C:\Program Files (x86)\Steam\steamapps\common\KSP Stripped>"C:\Program Files (x86)\Steam\steamapps\common\KSP Stripped\PluginData/KSPBurst@1.7.4.1-com.unity.burst@1.7.4\package/.Runtime/bcl.exe" @Logs\KSPBurst\test.rsp
Unexpected arguments: `  --platform=Windows   --output="KSP_x64_Data\Plugins\lib_burst_generated"   --backend=burst-llvm-12   --opt-level=3   --format=Elf   --debug=None   --verbose   --include-root-assembly-references=true   --chunk-size=3   --log-timings   --output-mode=SingleLibrary   --always-create-output=true   --target=X64_SSE2   --target=X64_SSE4   --target=AVX   --target=AVX2   --compilation-defines=UNITY_2019_4_18   --compilation-defines=UNITY_2019_4   --compilation-defines=UNITY_2019   --compilation-defines=UNITY_5_3_OR_NEWER   --compilation-defines=UNITY_5_4_OR_NEWER   --compilation-defines=UNITY_5_5_OR_NEWER   --compilation-defines=UNITY_5_6_OR_NEWER   --compilation-defines=UNITY_2017_1_OR_NEWER   --compilation-defines=UNITY_2017_2_OR_NEWER   --compilation-defines=UNITY_2017_3_OR_NEWER   --compilation-defines=UNITY_2017_4_OR_NEWER   --compilation-defines=UNITY_2018_1_OR_NEWER   --compilation-defines=UNITY_2018_2_OR_NEWER   --compilation-defines=UNITY_2018_3_OR_NEWER   --compilation-defines=UNITY_2018_4_OR_NEWER   --compilation-defines=UNITY_2019_1_OR_NEWER   --compilation-defines=UNITY_2019_2_OR_NEWER   --compilation-defines=UNITY_2019_3_OR_NEWER   --compilation-defines=UNITY_2019_4_OR_NEWER   --compilation-defines=PLATFORM_ARCH_64   --compilation-defines=UNITY_64   --compilation-defines=UNITY_INCLUDE_TESTS   --compilation-defines=ENABLE_AUDIO   --compilation-defines=ENABLE_CACHING   --compilation-defines=ENABLE_CLOTH   --compilation-defines=ENABLE_MICROPHONE   --compilation-defines=ENABLE_MULTIPLE_DISPLAYS   --compilation-defines=ENABLE_PHYSICS   --compilation-defines=ENABLE_TEXTURE_STREAMING   --compilation-defines=ENABLE_UNET   --compilation-defines=ENABLE_LZMA   --compilation-defines=ENABLE_UNITYEVENTS   --compilation-defines=ENABLE_WEBCAM   --compilation-defines=ENABLE_WWW   --compilation-defines=ENABLE_CLOUD_SERVICES_COLLAB   --compilation-defines=ENABLE_CLOUD_SERVICES_COLLAB_SOFTLOCKS   --compilation-defines=ENABLE_CLOUD_SERVICES_ADS   --compilation-defines=ENABLE_CLOUD_SERVICES_USE_WEBREQUEST   --compilation-defines=ENABLE_CLOUD_SERVICES_UNET   --compilation-defines=ENABLE_CLOUD_SERVICES_BUILD   --compilation-defines=ENABLE_CLOUD_LICENSE   --compilation-defines=ENABLE_EDITOR_HUB_LICENSE   --compilation-defines=ENABLE_WEBSOCKET_CLIENT   --compilation-defines=ENABLE_DIRECTOR_AUDIO   --compilation-defines=ENABLE_DIRECTOR_TEXTURE   --compilation-defines=ENABLE_MANAGED_JOBS   --compilation-defines=ENABLE_MANAGED_TRANSFORM_JOBS   --compilation-defines=ENABLE_MANAGED_ANIMATION_JOBS   --compilation-defines=ENABLE_MANAGED_AUDIO_JOBS   --compilation-defines=INCLUDE_DYNAMIC_GI   --compilation-defines=ENABLE_MONO_BDWGC   --compilation-defines=ENABLE_SCRIPTING_GC_WBARRIERS   --compilation-defines=PLATFORM_SUPPORTS_MONO   --compilation-defines=RENDER_SOFTWARE_CURSOR   --compilation-defines=ENABLE_VIDEO   --compilation-defines=PLATFORM_STANDALONE_WIN   --compilation-defines=PLATFORM_STANDALONE   --compilation-defines=UNITY_STANDALONE_WIN   --compilation-defines=UNITY_STANDALONE   --compilation-defines=ENABLE_RUNTIME_GI   --compilation-defines=ENABLE_MOVIES   --compilation-defines=ENABLE_NETWORK   --compilation-defines=ENABLE_CRUNCH_TEXTURE_COMPRESSION   --compilation-defines=ENABLE_UNITYWEBREQUEST   --compilation-defines=ENABLE_CLOUD_SERVICES   --compilation-defines=ENABLE_CLOUD_SERVICES_ANALYTICS   --compilation-defines=ENABLE_CLOUD_SERVICES_PURCHASING   --compilation-defines=ENABLE_CLOUD_SERVICES_CRASH_REPORTING   --compilation-defines=ENABLE_OUT_OF_PROCESS_CRASH_HANDLER   --compilation-defines=ENABLE_EVENT_QUEUE   --compilation-defines=ENABLE_CLUSTER_SYNC   --compilation-defines=ENABLE_CLUSTERINPUT   --compilation-defines=ENABLE_VR   --compilation-defines=ENABLE_AR   --compilation-defines=ENABLE_WEBSOCKET_HOST   --compilation-defines=ENABLE_MONO   --compilation-defines=NET_4_8   --compilation-defines=UNITY_PRO_LICENSE   --compilation-defines=ENABLE_CUSTOM_RENDER_TEXTURE   --compilation-defines=ENABLE_DIRECTOR   --compilation-defines=ENABLE_LOCALIZATION   --compilation-defines=ENABLE_SPRITES   --compilation-defines=ENABLE_TERRAIN   --compilation-defines=ENABLE_TILEMAP   --compilation-defines=ENABLE_TIMELINE   --compilation-defines=CSHARP_7_OR_LATER   --compilation-defines=CSHARP_7_3_OR_NEWER   --root-assembly="GameData\999_Scale_Redist.dll"   --root-assembly="GameData\ModuleManager.4.2.3.dll"   --root-assembly="GameData\000_ClickThroughBlocker\Plugins\ClickThroughBlocker.dll"   --root-assembly="GameData\000_Harmony\0Harmony.dll"   --root-assembly="GameData\000_Harmony\HarmonyInstallChecker.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\KSPBurst.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\Microsoft.Extensions.FileSystemGlobbing.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\System.IO.Compression.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\System.IO.Compression.FileSystem.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\System.Runtime.CompilerServices.Unsafe.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\System.Runtime.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\Unity.Burst.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\Unity.Burst.Unsafe.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\Unity.Collections.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\Unity.Jobs.dll"   --root-assembly="GameData\000_KSPBurst\Plugins\Unity.Mathematics.dll"   --root-assembly="GameData\001_ToolbarControl\Plugins\ToolbarControl.dll"   --root-assembly="GameData\B9PartSwitch\Plugins\B9PartSwitch.dll"   --root-assembly="GameData\CommunityCategoryKit\CCK.dll"   --root-assembly="GameData\FerramAerospaceResearch\Plugins\FerramAerospaceResearch.Base.dll"   --root-assembly="GameData\ModularFlightIntegrator\ModularFlightIntegrator.dll"   --root-assembly="GameData\FerramAerospaceResearch\Plugins\FerramAerospaceResearch.dll"   --root-assembly="GameData\FerramAerospaceResearch\Plugins\ferramGraph.dll"   --root-assembly="GameData\KsmUI\Plugins\KsmUI.dll"   --root-assembly="GameData\KSPCommunityFixes\Plugins\0_MultipleModuleInPartAPI.dll"   --root-assembly="GameData\KSPCommunityFixes\Plugins\KSPCommunityFixes.dll"   --root-assembly="GameData\KSPProfiler\Plugins\KSPProfiler.dll"   --root-assembly="GameData\QuickMods\QuickStart\Plugins\QuickStart.dll"   --root-assembly="GameData\RocketSoundEnhancement\Plugins\RocketSoundEnhancement.Unity.dll"   --root-assembly="GameData\Squad\Plugins\KSPSteamCtrlr.dll"   --root-assembly="GameData\UnityExplorerKSP\UniverseLibKSP.dll"   --root-assembly="GameData\UnityExplorerKSP\UnityExplorerKSP.dll"   --assembly-folder="GameData"   --assembly-folder="GameData\000_ClickThroughBlocker\Plugins"   --assembly-folder="GameData\000_Harmony"   --assembly-folder="GameData\000_KSPBurst\Plugins"   --assembly-folder="GameData\001_ToolbarControl\Plugins"   --assembly-folder="GameData\B9PartSwitch\Plugins"   --assembly-folder="GameData\CommunityCategoryKit"   --assembly-folder="GameData\FerramAerospaceResearch\Plugins"   --assembly-folder="GameData\ModularFlightIntegrator"   --assembly-folder="GameData\KsmUI\Plugins"   --assembly-folder="GameData\KSPCommunityFixes\Plugins"   --assembly-folder="GameData\KSPProfiler\Plugins"   --assembly-folder="GameData\QuickMods\QuickStart\Plugins"   --assembly-folder="GameData\RocketSoundEnhancement\Plugins"   --assembly-folder="GameData\Squad\Plugins"   --assembly-folder="GameData\UnityExplorerKSP"   --assembly-folder="KSP_x64_Data\Managed"`

I tried removing the spaces from each line and got:

C:\Program Files (x86)\Steam\steamapps\common\KSP Stripped>"C:\Program Files (x86)\Steam\steamapps\common\KSP Stripped\PluginData/KSPBurst@1.7.4.1-com.unity.burst@1.7.4\package/.Runtime/bcl.exe" @Logs\KSPBurst\test.rsp
Illegal characters in path.

---

ok I got some output by removing the --output line, so maybe it thinks the backslashes are escape characters?

---

Oh my....is it complaining about the space in the working directory path maybe?

C:\Program Files (x86)\Steam\steamapps\common\KSP Stripped>"C:\Program Files (x86)\Steam\steamapps\common\KSP Stripped\PluginData/KSPBurst@1.7.4.1-com.unity.burst@1.7.4\package/.Runtime/bcl.exe" @Logs\KSPBurst\test.rsp
Options processed in:                35ms
UpdateObjectFormatFromPlatform:       2ms
An unexpected exception occurred:
System.InvalidOperationException: Unable to combine path `C:\Program Files (x86)\Steam\steamapps\common\KSP Stripped` with `"GameData"`. Reason: Illegal characters in path. ---> System.ArgumentException: Illegal characters in path.
   at System.IO.Path.CheckInvalidPathChars(String path, Boolean checkAdditional)
   at System.IO.Path.Combine(String path1, String path2)
   at Burst.Bcl.BclApp.SafePathCombine(String path, String path2)
   --- End of inner exception stack trace ---
   at Burst.Bcl.BclApp.SafePathCombine(String path, String path2)
   at Burst.Bcl.BclApp..ctor(BclOptions options)
   at Burst.Bcl.Program.GetApp(BclOptions options)
   at Burst.Bcl.Program.BuildTheThing(BclOptions options, Stopwatch& individualTimer)
   at Burst.Bcl.Program.Main(String[] args)

[JonnyOThan]

OK so...response files will solve this problem. But not if there are spaces in the path to your KSP install. Which is probably true for most people running a default install off steam.

Might be able to work around that by creating a temporary junction to the ksp install at a path that doesn't have spaces....

[JonnyOThan]

Actually never mind, the response files work fine. I had quotes in there because I had just repurposed the command_line.log file. Removing them works great.