Bug 144538

Summary:	Add environment variables in commandline to start headless LO with or without experimental support and other features
Product:	LibreOffice	Reporter:	Timur <timur>
Component:	framework	Assignee:	Not Assigned <libreoffice-bugs>
Status:	NEW ---
Severity:	enhancement	CC:	himajin100000
Priority:	medium
Version:	7.3.0.0 alpha0+
Hardware:	All
OS:	All
URL:	https://wiki.documentfoundation.org/Development/Environment_variables
Whiteboard:
Crash report or crash signature:		Regression By:
Bug Depends on:
Bug Blocks:	103266

Description Timur 2021-09-16 12:46:49 UTC

Since 7.0 Calc has "Very large spreadsheets" experimental option (under Options-Calc-Defaults).
(It's still buggy as seen in bug 133764 and regression bug 133619.)

There should be an option in command line to start headless LO with or without that jumbo option.

Comment 1 Timur 2021-09-16 12:50:08 UTC

ON a second thought, it would be better to add option to use Experimental features or not, and than add suboptions like this one for jumbo sheet option.

Comment 2 Mike Kaganski 2021-09-16 13:03:31 UTC

For such options, the only reasonable comment-line solution could be to use environment variables. No command line arguments should be added. But environment variables are fine; and we already used those - e.g., when testing harfbuzz IIRC.

Comment 3 Timur 2021-09-17 07:09:29 UTC

I'll take that as confirmation and retitle to  environment variable for experimental support. 
Further there should be possible to chanage: Calc jumbo sheet, Writer outline (those 2 are experimental as of 7.3+), Calc Multi-Threaded Calculation, OpenCL.

Comment 4 Timur 2021-09-17 07:28:59 UTC

Per list there exists: SC_NO_THREADED_CALCULATION, SAL_DISABLE_OPENCL.
SC_NO_THREADED_CALCULATION doesn't seem to work, it cannot disable Multi-Threaded Calculation.
But while SAL_DISABLE_OPENCL=1 can disable OpenCL, it cannot be enabled.

Comment 5 Mike Kaganski 2021-09-17 08:16:48 UTC

FTR: https://opengrok.libreoffice.org/xref/core/vcl/README.vars?r=d4afd3ae lists environment variables affecting VCL. There are e.g. things to enable/force Skia or RTL UI.

https://opengrok.libreoffice.org/xref/core/include/sal/log.hxx?r=95e26d3d#206 describes the complex syntax for SAL_WARN environment variable, which controls the amount of logging to output in debug builds.

So having a set of variables (or a variable taking complex value) to control experimental features would be in line with this already existing approach.