Clojurians Log v2

hello all. How do I rund depstar to only include .class and not .clj in jar?

Sounds like you want the :exclude regex option?

even when using uberjar

See https://github.com/seancorfield/depstar/#excluding-files

why is it including .clj in libs ?

not .class

Not all .clj files get compiled (Clojure itself has at least one .clj file that doesn't get compiled).

(just checked, Clojure 1.10.2 has 43 .clj files)

so, I can not provide a jar with only .class?

Even if you AOT your main namespace with depstar, anything that is not statically reachable from it will not be compiled: AOT is purely transitive. If you use :compile :all, it will attempt to compile all of your own namespaces -- not just your main ns -- but even that won't necessarily reach all possible .clj files in all the transitive dependencies.

yes, I used it :compile :all but I saw that other libs did not been compile

what is the matter about not compile everything into .class?

I just explained that.

shame me, sorry

what you normaly use? :compile :all ?

:compile :all will compile all the namespaces in your project, which will also transitively compile every namespace that is statically reachable from your code: that's how Clojure's compile function works. If there are namespaces in libraries you use that are not statically reachable from any of your namespaces, they will not be "seen" by compile and they will not be compiled to .class files. That means if you use :exclude to omit all .class files, you may fail at runtime if a namespace that was not statically reachable is then loaded dynamically. You should be able to :exclude just your own code's .clj files from the JAR if you're careful with the regex -- and you do not have any code that is only reachable dynamically.

At work, we just use :aot true :main-class <some ns>. We "don't care" if source ends up in the JAR and we "don't care" about the potential "runtime compilation" overhead for namespaces that are only loaded dynamically.

so, no way to exist an obfuscator to clojure?

Like I keep saying -- and as it explains in the section of the README that I linked to: you can use :exclude with a regex to omit .clj files -- but you need to be careful to not exclude something that ends up being dynamically loaded at runtime because those would not be compiled by Clojure (because they are not statically reachable).

And it's also worth pointing out that JVM bytecode decompilers exist: so even if your code is all .class files, folks can decompile that into Java source code for the most part. It's weird Java source code but it's going to allow anyone to figure out how your code works.

What problem are you trying to solve here?

I didn´t know that in .jar it´s carrying the .clj and someone can see it. The .class , I think, it´s more difficult to read it

I thought it was compiled all into .class stuffs

Nearly all Clojure libraries are source code. It's actually bad to compile a library since it can cause version conflicts later on. Compiling an uberjar/application is fine but all it does is improve startup time.

I got it. So, what happen when you compile to GraalVM?

No idea, never used it.

thanks for your explanation

As a concrete example:

(! 685)-> clojure -X:new :template app :name fabrao/example
Generating a project called example based on the 'app' template.
(! 686)-> cd example/
(! 687)-> cat deps.edn 
...
  :uberjar {:replace-deps {seancorfield/depstar {:mvn/version "2.0.171"}}
            :exec-fn hf.depstar/uberjar
            :exec-args {:aot true
                        :jar "example.jar"
                        :main-class "fabrao.example"
                        :sync-pom true}}}}
;; specify compile all instead of default behavior:
(! 688)-> clojure -X:uberjar :compile :all
[main] INFO hf.depstar.uberjar - Synchronizing pom.xml
Skipping paths: resources
[main] INFO hf.depstar.uberjar - Compiling fabrao.example ...
[main] INFO hf.depstar.uberjar - Building uber jar: example.jar
[main] INFO hf.depstar.uberjar - Processing pom.xml for {fabrao/example {:mvn/version "0.1.0-SNAPSHOT"}}
;; note that there's only one ns in this project so compile all is no different that just aot'ing that one (main) namespace!
(! 689)-> jar tvf example.jar |fgrep .clj
   253 Fri Feb 12 10:56:51 PST 2021 fabrao/example.clj
 12711 Tue Jan 26 12:54:48 PST 2021 clojure/string.clj
... and about 40 more .clj files from Clojure itself ...
(! 690)-> jar tvf example.jar |fgrep fabrao
     0 Fri Feb 12 10:57:19 PST 2021 fabrao/
  1439 Fri Feb 12 10:57:19 PST 2021 fabrao/example$_main.class
  1340 Fri Feb 12 10:57:19 PST 2021 fabrao/example$fn__140.class
  1916 Fri Feb 12 10:57:19 PST 2021 fabrao/example$greet.class
  1581 Fri Feb 12 10:57:19 PST 2021 fabrao/example$loading__6738__auto____138.class
  1964 Fri Feb 12 10:57:19 PST 2021 fabrao/example.class
  3046 Fri Feb 12 10:57:19 PST 2021 fabrao/example__init.class
   253 Fri Feb 12 10:56:51 PST 2021 fabrao/example.clj
     0 Fri Feb 12 10:57:19 PST 2021 META-INF/maven/fabrao/
     0 Fri Feb 12 10:57:19 PST 2021 META-INF/maven/fabrao/example/
   109 Fri Feb 12 10:57:19 PST 2021 META-INF/maven/fabrao/example/pom.properties
  1594 Fri Feb 12 10:57:19 PST 2021 META-INF/maven/fabrao/example/pom.xml

(! 694)-> clojure -X:uberjar :compile :all :exclude '["fabrao.*\\.clj"]'
[main] INFO hf.depstar.uberjar - Synchronizing pom.xml
Skipping paths: resources
[main] INFO hf.depstar.uberjar - Compiling fabrao.example ...
[main] INFO hf.depstar.uberjar - Building uber jar: example.jar
[main] INFO hf.depstar.uberjar - Processing pom.xml for {fabrao/example {:mvn/version "0.1.0-SNAPSHOT"}}
(! 695)-> jar tvf example.jar |fgrep fabrao
     0 Fri Feb 12 11:02:45 PST 2021 fabrao/
  1439 Fri Feb 12 11:02:45 PST 2021 fabrao/example$_main.class
  1340 Fri Feb 12 11:02:45 PST 2021 fabrao/example$fn__140.class
  1916 Fri Feb 12 11:02:45 PST 2021 fabrao/example$greet.class
  1581 Fri Feb 12 11:02:45 PST 2021 fabrao/example$loading__6738__auto____138.class
  1964 Fri Feb 12 11:02:45 PST 2021 fabrao/example.class
  3046 Fri Feb 12 11:02:45 PST 2021 fabrao/example__init.class
     0 Fri Feb 12 11:02:46 PST 2021 META-INF/maven/fabrao/
     0 Fri Feb 12 11:02:46 PST 2021 META-INF/maven/fabrao/example/
   109 Fri Feb 12 11:02:46 PST 2021 META-INF/maven/fabrao/example/pom.properties
  1594 Fri Feb 12 11:02:46 PST 2021 META-INF/maven/fabrao/example/pom.xml