This plugins embeds a ruby interpreter inside DFHack (ie inside Dwarf Fortress).
The plugin maps all the structures available in library/xml/ to ruby objects.
These objects are described in ruby-autogen.rb, they are all in the DFHack::
module. The toplevel 'df' method is a shortcut to the DFHack module.
The plugin does *not* map most of dfhack methods (MapCache, ...) ; only direct
access to the raw DF data structures in memory is provided.
Some library methods are stored in the ruby.rb file, with shortcuts to read a
map block, find an unit or an item, etc.
Global objects are accessible through the 'df' accessor (eg df.world).
The ruby plugin defines 2 dfhack console commands:
rb_load <filename> ; load a ruby script. Ex: rb_load hack/plants.rb (no quotes)
rb_eval <ruby expression> ; evaluate a ruby expression, show the result in the
console. Ex: rb_eval df.find_unit.name.first_name
You can use single-quotes for strings ; avoid double-quotes that are parsed
and removed by the dfhack console.
If dfhack reports 'rb_eval is not a recognized command', check stderr.log. You
need a valid 32-bit ruby library to work, and ruby1.8 is prefered (ruby1.9 may
crash DF on startup for now). Install the library in the df root folder (or
hack/ on linux), the library should be named 'libruby.dll' (.so on linux).
You can download a tested version at http://github.com/jjyg/dfhack/downloads/
The plugin also interfaces with dfhack 'onupdate' hook.
To register ruby code to be run every graphic frame, use:
handle = df.onupdate_register { puts 'i love flooding the console' }
To stop being called, use:
df.onupdate_unregister handle
The same mechanism is available for onstatechange.
Exemples
--------
For more complex exemples, check the ruby/plugins/ source folder.
Show info on the currently selected unit ('v' or 'k' DF menu)
p df.find_unit.flags1
Set a custom nickname to unit with id '123'
df.find_unit(123).name.nickname = 'moo'
Show current unit profession
p df.find_unit.profession
Change current unit profession
df.find_unit.profession = :MASON
Center the screen on unit '123'
df.center_viewscreen(df.find_unit(123))
Find an item at a given position, show its C++ classname
df.find_item(df.cursor)._rtti_classname
Find the raws name of the plant under cursor
plant = df.world.plants.all.find { |plt| df.at_cursor?(plt) }
p df.world.raws.plants.all[plant.mat_index].id
Dig a channel under the cursor
df.map_designation_at(df.cursor).dig = :Channel
df.map_block_at(df.cursor).flags.designated = true
Compilation
-----------
The plugin consists of the ruby.rb file including user comfort functions and
describing basic classes used by the autogenerated code, and ruby-autogen.rb,
the auto-generated code.
The generated code is generated by codegen.pl, which takes the codegen.out.xml
file as input.
For exemple,
<ld:global-type ld:meta="struct-type" type-name="unit">
<ld:field type-name="language_name" name="name" ld:meta="global"/>
<ld:field name="custom_profession" ld:meta="primitive" ld:subtype="stl-string"/>
<ld:field ld:subtype="enum" base-type="int16_t" name="profession" type-name="profession" ld:meta="global"/>
Will generate
class Unit < MemHack::Compound
field(:name, 0) { global :LanguageName }
field(:custom_profession, 60) { stl_string }
field(:profession, 64) { number 16, true }
The syntax for the 'field' method is:
1st argument = name of the method
2nd argument = offset of this field from the beginning of the struct.
The block argument describes the type of the field: uint32, ptr to global...
Primitive type access is done through native methods in ruby.cpp (vector length,
raw memory access, etc)
MemHack::Pointers are automatically dereferenced ; so a vector of pointer to
Units will yield Units directly. Null pointers yield the 'nil' value.
This allows to use code such as 'df.world.units.all[0].pos', with 'all' being
in fact a vector of *pointers* to DFHack::Unit objects.
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