retroforth/interface/scripting.retro

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# Scripting Support
This is the scripting interface words for use with retro-unix
or other interfaces providing device type 9 support.
## Rev. 0
The initial version of this I/O device provides support for some
basic interactions.
- obtaining the name of the script
- obtaining the number of arguments passed
- obtaining the arguments passed
- "including" a file (which has RETRO process the file as inuput)
## Rev. 1
In 2020.10, the device was extended to add support for new additional
introspection and control of the `include` process.
- obtaining the current file name
- obtaining the current line number
- direct RETRO to ignore the rest of the current line
- direct RETRO to ignore any remaining lines in the file
## Rev. 2
Adds support for `abort`.
# The Code
~~~
{{
:script:operation
#9 io:scan-for
dup n:negative? [ drop 'Error:_device_(0009)_not_found s:put nl ] if;
io:invoke ;
---reveal---
:script:arguments (-n) #0 script:operation ;
:script:get-argument (n-s) s:empty swap #1 script:operation ;
:include (s-) #2 script:operation ;
:script:name (-s) s:empty #3 script:operation ;
:script:current-file (-s) s:empty #4 script:operation ;
:script:current-line (-n) #5 script:operation class:data ; immediate
:script:ignore-to-eol (-) #6 script:operation ;
:script:abort-include (-) #7 script:operation ;
:abort (-) &Compiler v:off #8 script:operation ;
}}
~~~
## d:source
~~~
'interface/scripting.retro s:keep
dup 'abort d:lookup d:source store
dup 'script:abort-include d:lookup d:source store
dup 'script:ignore-to-eol d:lookup d:source store
dup 'script:current-line d:lookup d:source store
dup 'script:current-file d:lookup d:source store
dup 'script:name d:lookup d:source store
dup 'include d:lookup d:source store
dup 'script:get-argument d:lookup d:source store
dup 'script:arguments d:lookup d:source store
drop
~~~