On Nov 16, 2008, at 10:34 PM, Rich Hickey wrote:
> Since it only requires main, might I suggest you write this in
> Clojure instead?
I gave that a try.
Here's a simple version of a driver for the compiler, stored in src/
clj/clojure/compile.clj:
(ns clojure.compile)
(defn main
"Compiles libs into class files stored at compile-path.
All args are strings"
[compile-path & libs]
(printf "Compiling %d libs to %s\n" (count libs) compile-path)
(flush)
(binding [*compile-path* compile-path]
(doseq [lib libs]
(compile (symbol lib)))))
It works when run from within the Clojure repl:
% ls build/classes/clojure/hello*
ls: build/classes/clojure/*hello*: No such file or directory
% java -cp clojure.jar:src/clj/ clojure.lang.Repl
Clojure
user=> (require 'clojure.compile)
nil
user=> (clojure.compile/main "build/classes" "clojure.hello")
Compiling 1 libs to build/classes
nil
user=>
% ls build/classes/clojure/hello*
build/classes/clojure/hello$main__8.class build/classes/clojure/
hello.class
but when run as a standalone main, it gives an exception that appears
to be related to static initializers:
% java -cp clojure.jar:src/clj/ clojure.compile build/classes
clojure.hello
Compiling 1 libs to build/classes
Exception in thread "main" java.lang.IllegalStateException: Var null/
null is unbound. (hello.clj:3)
at clojure.lang.Compiler.analyzeSeq(Compiler.java:4067)
at clojure.lang.Compiler.analyze(Compiler.java:3896)
at clojure.lang.Compiler.analyzeSeq(Compiler.java:4050)
at clojure.lang.Compiler.analyze(Compiler.java:3896)
at clojure.lang.Compiler.access$100(Compiler.java:38)
at clojure.lang.Compiler$DefExpr$Parser.parse(Compiler.java:365)
at clojure.lang.Compiler.analyzeSeq(Compiler.java:4060)
at clojure.lang.Compiler.analyze(Compiler.java:3896)
at clojure.lang.Compiler.analyzeSeq(Compiler.java:4050)
at clojure.lang.Compiler.analyze(Compiler.java:3896)
at clojure.lang.Compiler.analyze(Compiler.java:3869)
at clojure.lang.Compiler.compile(Compiler.java:4498)
at clojure.lang.RT.compile(RT.java:408)
at clojure.lang.RT.load(RT.java:450)
at clojure.lang.RT.load(RT.java:422)
at clojure.core$load__4423$fn__4425.invoke(core.clj:3343)
at clojure.core$load__4423.doInvoke(core.clj:3342)
at clojure.lang.RestFn.invoke(RestFn.java:413)
at clojure.core$load_one__4386.invoke(core.clj:3189)
at clojure.core$compile__4429.invoke(core.clj:3347)
at clojure.compile$main__5162.doInvoke(compile.clj:23)
at clojure.lang.RestFn.invoke(RestFn.java:428)
at clojure.lang.Var.invoke(Var.java:323)
at clojure.lang.AFn.applyToHelper(AFn.java:195)
at clojure.lang.Var.applyTo(Var.java:436)
at clojure.compile.main(Unknown Source)
Caused by: java.lang.IllegalStateException: Var null/null is unbound.
at clojure.lang.Var.get(Var.java:129)
at clojure.lang.Compiler$FnExpr.parse(Compiler.java:2947)
at clojure.lang.Compiler.analyzeSeq(Compiler.java:4058)
... 25 more
%
For reference, here is the test compilee: src/clj/clojure/hello.clj:
(ns clojure.hello)
(defn main
[greetee]
(printf "Hello, %s wow\n" greetee)
(flush))
I'd appreciate help in getting a standalone invocation of something
like compile.clj above (i.e., using it's own main without Repl or
Script) to work.
In working through this, I also found that a compiler driver written
in Java may be preferable for use via build.xml because of a bootstrap
problem. Until we compile (something like) "compile.clj", we can't
call it as a standalone main. (One could add a step that builds the
compiler driver via a clojure.lang.Script invocation.)
--Steve
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