Re: Getting kawa -w to work on OS X

[Per Bothner <per at bothner dot com>]

On 01/17/2017 10:16 PM, Duncan Mak wrote:
> Hello Per,
>
> I just tried building kawa from source (using a checkout from the
> gitlab repo) and "kawa -w" works if I build it locally.
>
> Running it from the official binary distribution fails
> (https://github.com/Homebrew/homebrew-core/pull/8301#issuecomment-273030690)
> - this means there's something system-dependent that got baked into
> the JAR file?

My guess is the "system dependency" is DomTerm and/or JLine.  If you build
from source, if you don't specify the configure flags --with-domterm and/or --with-jline3
then -w will be equivalent to -wswing - it won't try to use any of the DomTerm
console variations.  However, the binary distribution includes both,
so -w will try to use Domterm (and jline) and fail.

The old Swing console works, but it has some basic problems, specifically
rather limited input editing.

You can use the DomTerm and JLine from the binary distribution
to build the source distribution:
  ./configure --with-domterm=/tmp/kawa-2.3 --with-jline3=/tmp/kawa-2.3/lib/jline.jar
assuming you unziped kawa-2.3.zip into /tmp

You can also try the attached patch.  You're supposed to see something like:

$ bin/kawa -w
java.lang.Error: setCurL:kawa.standard.Scheme@1a86f2f1 th:Thread[main,5,main] p1:#|kawa:%N|#  p2:#|%P.%N|#
	at gnu.expr.Language.setCurrentLanguage(Language.java:55)
	at gnu.expr.Language.setDefaults(Language.java:1206)
	at kawa.repl.getLanguage(repl.java:227)
	at kawa.repl.processArgs(repl.java:383)
	at kawa.repl.main(repl.java:820)
Started web server on port 46315.  Browse http://127.0.0.1:46315/
java.lang.Error: DomTerm.run th:Thread[Thread-9,5,main] p1:#|kawa:%N|#  p2:#|%P.%N|#
	at kawa.DomTermBackend.run(DomTermBackend.java:132)
	at java.lang.Thread.run(Thread.java:745)

--
	--Per Bothner
per@bothner.com   http://per.bothner.com/

diff --git a/gnu/expr/Language.java b/gnu/expr/Language.java
index 0447af9..2bd0663 100644
--- a/gnu/expr/Language.java
+++ b/gnu/expr/Language.java
@@ -52,6 +52,7 @@ public abstract class Language
         CheckConsole.prompt1.set(language.getPrimaryPrompt());
     if (CheckConsole.prompt2.get(null) == null)
         CheckConsole.prompt2.set(language.getSecondaryPrompt());
+    new Error("setCurL:"+language+" th:"+Thread.currentThread()+" p1:"+CheckConsole.prompt1.get(null)+" p2:"+CheckConsole.prompt2.get(null)).printStackTrace();
   }
 
   public static Language setSaveCurrent (Language language)
diff --git a/kawa/DomTermBackend.java b/kawa/DomTermBackend.java
index feb4f81..0492b0b 100644
--- a/kawa/DomTermBackend.java
+++ b/kawa/DomTermBackend.java
@@ -129,6 +129,7 @@ public class DomTermBackend extends Backend implements Runnable {
     }
 
     public void run() {
+        new Error("DomTerm.run th:"+Thread.currentThread()+" p1:"+CheckConsole.prompt1.get(null)+" p2:"+CheckConsole.prompt2.get(null)).printStackTrace();
         Writer errWriter = new DomTermErrorWriter(termWriter);
         OutPort outp = new OutPort(termWriter, true, true,
                                    Path.valueOf("/dev/stdout"));