1) Starting with this commit, configuration block exported into G-code
is delimited by "; prusaslicer_config = begin" and "; prusaslicer_config = end".
These delimiters look like any other key / value configuration pairs
on purpose to be compatible with older PrusaSlicer config parsing from G-code.
2) Config parser from G-code newly searches for "; generated by ..."
comment over the complete G-code, thus it is compatible with various
post processing scripts extending the G-code at the start.
3) Config parser from G-code parses PrusaSlicer version from
the "; generated by PrusaSlicer ...." header and if the G-code was
generated by PrusaSlicer 2.4.0-alpha0 and newer, it expects that
the G-code already contains the "; prusaslicer_config = begin / end"
tags and it relies on these tags to extract configuration.
4) A new simple and robust parser was written for reading project configuration
from 3MF / AMF, while a heuristic parser to read config from G-code located
at the end of the G-code file was used before.
config bundles, project files (3MFs, AMFs). When loading these files,
the caller may decide whether to substitute some of the configuration
values the current PrusaSlicer version does not understand with
some reasonable default value, and whether to report it. If substitution
is disabled, an exception is being thrown as before this commit.
If substitution is enabled, list of substitutions is returned by the
API to be presented to the user. This allows us to introduce for example
new firmware flavor key in PrusaSlicer 2.4 while letting PrusaSlicer
2.3.2 to fall back to some default and to report it to the user.
When slicing from command line, substutions are performed by default
and reported into the console, however substitutions may be either
disabled or made silent with the new "config-compatibility" command
line option.
Substitute enums and bools only. Allow booleans to be parsed as
true: "1", "enabled", "on" case insensitive
false: "0", "disabled", "off" case insensitive
This will allow us in the future for example to switch the draft_shield
boolean to an enum with the following values: "disabled" / "enabled" / "limited".
Added "enum_bitmask.hpp" - support for type safe sets of options.
See for example PresetBundle::load_configbundle(...
LoadConfigBundleAttributes flags) for an example of intended usage.
WIP: GUI for reporting the list of config substitutions needs to be
implemented by @YuSanka.
