Making friends; Android simplified view construction with the kawa runtime (kawart.jar instead of kawa.jar)

[Marius Kjeldahl <marius at kjeldahl dot net>]

As I've mentioned before, the example on the Kawa site for "Android 
simplified view" construction does NOT work out of the box when using 
the "kawart" jar file (Kawa "runtime").

As an experiment I decided to figure out what it would take to get it 
working, and what the net benefit would be to the result jar/apk file.

Mission accomplished. The net benefit wasn't big; after optimization 
(Proguard) the apk size went from 189kb to 185kb, just under 4k.

Here's what I had to do to get it working.

1. Modify the classes-to-skip-for-runtime as follows (patch style):

Index: classes-to-skip-for-runtime
===================================================================
--- classes-to-skip-for-runtime (revision 7525)
+++ classes-to-skip-for-runtime (working copy)
@@ -54,7 +54,6 @@
 gnu/expr/KawaCompiledScript.class
 gnu/expr/KawaScriptBindings.class
 gnu/expr/LangExp.class
-gnu/expr/LetExp.class
 gnu/expr/LitTable.class
 gnu/expr/ObjectExp.class
 gnu/expr/ProcInitializer.class
@@ -104,20 +103,9 @@
 kawa/lang/Lambda.class
 kawa/lang/ListPat.class
 kawa/lang/ListRepeatPat.class
-kawa/lang/Macro.class
 kawa/lang/PairPat.class
-kawa/lang/Pattern.class
-kawa/lang/Quote.class
 kawa/lang/CompileFile.class
 kawa/lang/PatternScope.class
-kawa/lang/Syntax.class
-kawa/lang/SyntaxForm.class
-kawa/lang/SyntaxForms.*.class
-kawa/lang/SyntaxPattern.class
-kawa/lang/SyntaxRule.class
-kawa/lang/SyntaxRules.class
-kawa/lang/SyntaxTemplate.class
-kawa/lang/TemplateScope.class
 kawa/lang/VarListPat.class
 kawa/lib/misc_syntax.*.class
 kawa/lib/prim_syntax.*.class
@@ -152,11 +140,6 @@
 kawa/standard/SchemeCompilation.class

2. Add the following to the proguard configuration:

-dontwarn gnu.**
-dontwarn kawa.**

-keep class gnu.expr.Language
-keep class gnu.mapping.Location
-keep class gnu.mapping.Symbol
-keep class gnu.mapping.Procedure
-keep class gnu.mapping.Environment
-keep class gnu.mapping.CallContext
-keep class gnu.mapping.Values
-keep class gnu.lists.LList
-keep class kawa.lang.Pattern
-keep class kawa.lang.SyntaxPattern
-keep class kawa.lang.TemplateScope

I am not sure what the real idea with the kawa runtime really is, but if 
the stuff that the "android simplified view" construction is supposed to 
work with the kawa runtime (kawart), I propose that this gets fixed so 
that it works.

A final word; I figured this out by a lot of trial and error, using the 
new build system I have running. As such, I can not explain why these 
changes should or should not go in; I just wanted to share how I got it 
working in case it is important.

At least from the point of view of shrinkage, I do not believe the 4k is 
worth anything, so an alternative "fix" to make sure the android samples 
always work with kawa is to state that you need to use the "full" kawa 
jar file, not the kawa runtime file (kawart).

Thanks,

Marius Kjeldahl