I am seriously pulling my hair right now! I am a total noob at clojure: I can't seem to be able to get a simple clojurescript compilation done without this error:
ERROR: JSC_MISSING_PROVIDE_ERROR. required "clojure.core.async" namespace never provided at /home/jldupont/workspace/$someproject/target/cljsbuild-compiler-0/domain2/main.js line 4 : 0
I've got the following project.clj file:
(defproject $someproject "0.1"
:description "some project..."
:dependencies [[org.clojure/clojure "1.5.1"]
[org.clojure/clojurescript "0.0-2030"]
[org.clojure/core.async "0.1.267.0-0d7780-alpha"]
]
:plugins [[lein-cljsbuild "0.3.2"]]
:cljsbuild {
:builds [{:id "domain2"
:source-paths ["src/cljs/model2/domain"]
:compiler {:output-to "src/assets/js/model2/domain/domain2.js"
:optimizations :advanced
:pretty-print true}
}
]
}
)
Everytime I use lein cljsbuild auto I get the error quoted above.
Please help!
Update
I've looked in my ~/.m2 directory and the dependencies ( in this case core.async ) are present.
Update 2
It would appear that it is the Google Closure Compiler that spews out this error message. Not sure how to provide it a path to the dependencies...
As mentioned in my comment above: if you want to use core.async with ClojureScript you have to require the namespace cljs.core.async (instead of Clojure's clojure.core.async).
Related
My goal is to create a web application using compojure and attach datomic as database. Individually, these two components work fine. However, when I try to start the server with
lein ring server-headless (including datomic as a dependency) with an enourmous error. The head of the error output:
Exception in thread "main" java.lang.NoClassDefFoundError: org/eclipse/jetty/util/component/AggregateLifeCycle, compiling:(ring/adapter/jetty.clj:1:1)
at clojure.lang.Compiler.load(Compiler.java:7391)
at clojure.lang.RT.loadResourceScript(RT.java:372)
at clojure.lang.RT.loadResourceScript(RT.java:363)
at clojure.lang.RT.load(RT.java:453)
at clojure.lang.RT.load(RT.java:419)
at clojure.core$load$fn__5677.invoke(core.clj:5893)
using the project.clj
(defproject pinvest "0.1.0-SNAPSHOT"
:description "foobar"
:min-lein-version "2.0.0"
:dependencies [[org.clojure/clojure "1.8.0"]
[org.clojure/core.async "0.3.442"]
[org.clojure/tools.namespace "0.2.11"]
[compojure "1.5.1"]
[ring/ring-defaults "0.2.1"]
[com.datomic/clj-client "0.8.606"]]
:plugins [[lein-ring "0.9.7"]]
:ring {:handler pinvest.handler/app}
:profiles
{:dev {:dependencies [[javax.servlet/servlet-api "2.5"]
[ring/ring-mock "0.3.0"]]}})
Initially generated with lein new compojure foo. The dependency com.datomic/clj-client is causing the problem in starting the server.
I tried excluding some dependencies, by making my project.clj with
[com.datomic/clj-client "0.8.606"
:exclusions [org.eclipse.jetty/jetty-http
org.eclipse.jetty/jetty-util
org.eclipse.jetty/jetty-client]]
but that just results in
clojure.lang.Compiler$CompilerException: java.lang.ClassNotFoundException: org.eclipse.jetty.client.HttpClient, compiling:(cognitect/http_client.clj:1:1)
Any help would be greatly appriciated.
PS. I'm a newbie to clojure, and these error messages are just impossible to understand
Try not to use jetty. Someone from the Slack group who came up with a very similar problem now uses this combination (http-kit in place of jetty):
[com.datomic/datomic-free "0.9.5544"] [ring/ring-core "1.5.0"] [http-kit "2.2.0"]
I ran into this issue too and could find no workaround. From what I understand it looks like ring-core is using an older jetty adapter for legacy purposes. I've found https://github.com/sunng87/ring-jetty9-adapter a worthy replacement as a ring dependancy so far with no further issues in my setup:
[com.datomic/clj-client "0.8.606" :exclusions [org.eclipse.jetty/jetty-http org.eclipse.jetty/jetty-util org.eclipse.jetty/jetty-client]]
[info.sunng/ring-jetty9-adapter "0.10.0"]
It's odd. The :exclusion worked for me(but I see it did not work for you). It's documented here
[com.datomic/client-pro "0.8.28"
:exclusions [org.eclipse.jetty/jetty-client
org.eclipse.jetty/jetty-http
org.eclipse.jetty/jetty-util]]
I am trying my first run with ring and lein, and I am facing problems in getting it to run. I have taken this example from the book "Web development with Clojure", chapter 1, and also from https://quickleft.com/blog/your-first-clojure-web-app/ . The code from both these sites give me the same error - Class Not Found.
I have the following project.clj
(defproject myfirstwebapp "0.1.1"
:description "A hello world for a Ring based web app"
:dependencies [[org.clojure/clojure "1.8.0"]
[ring "1.4.0"]]
:plugins [[lein-ring "0.9.7"]]
:dev-dependencies [[lein-ring "0.9.7"]]
:ring {:handler myfirstwebapp.core/app})
And the following core.clj
(ns myfirstwebapp.core)
(defn app [req]
{:status 200
:headers {"content-Type" "text/html"}
:body "Hello World!"})
And the commands I ran were these:
lein new myfirstwebapp
edit project.clj as above
cd myfirstwebapp
lein deps
edit src/myfirstwebapp/core.clj as above
lein ring server
And now I am getting errors like:
Exception in thread "main" java.lang.ClassNotFoundException: leiningen.core.project$reduce_repo_step, compiling:(C:\Users\ROG\form-init7789757414629005682.clj:1:17608)
Is there some mismatch between the versions of different components that I am using? Or something else?
It is a bug in lein 2.6.0. Fixed in 2.6.1
What can cause lein uberjar to fail with "Caused by: java.lang.ClassNotFoundException" errors when lein run runs my app successfully? I'm using leiningen 2.5.1.
It looks like leiningen provides profiles as a way to make custom environments for certain tasks. However, I don't believe a profile difference between what is happening with lein run and lein uberjar is responsible because ...
1) I tried producing the uberjar with every possible profile, via lein with-profile <profile> for every <profile> named in the output of lein show-profiles.
2) I ran lein with-profile uberjar run, and no errors arose.
In case the answer to this problem and similar problems might be specific to the classes and dependencies involved, it is classes related to Overtone that produce the ClassNoteFoundException errors.
My project.clj file looks like:
(defproject cochlea "0.1.0-SNAPSHOT"
:description "An interactive ear training GUI application"
:url "http://github.com/seewalker/cochlea"
:license {:name "GPL v3"
:url "http://www.gnu.org/copyleft/gpl.html"}
:repositories {"conjars" "http://conjars.org/repo"}
:dependencies [[org.clojure/clojure "1.5.1"]
[overtone "0.9.1"]
[org.clojure/tools.trace "0.7.5"]
[org.clojure/java.jdbc "0.3.7"]
[postgresql "9.1-901.jdbc4"]
[environ "0.5.0"]
[incanter "1.9.0"]
[clj-time "0.9.0"]
[me.raynes/conch "0.8.0"]
[seesaw "1.4.2" :exclusions [org.clojure/clojure]]]
:profiles { :uberjar {:aot :all} }
:repl-options { :timeout 120000}
:main cochlea.core
:target-path "target/%s")
I'm trying to use figwheel build for my project. I use the latest versions of libs and my leiningen version is 2.5.1. My build file looks like this:
(defproject figwheel-issue "1.2.3"
:plugins [[lein-cljsbuild "1.0.6"]
[lein-figwheel "0.3.3"]]
:dependencies [[org.clojure/clojurescript "0.0-3269"]
[org.clojure/clojure "1.7.0-beta3"]]
:cljsbuild {
:builds [{ :id "dev"
:source-paths ["src"]
:figwheel true
:compiler {
:main myproject/core
:hashbang false
:asset-path "js/out"
:output-to "resources/public/js/example.js"
:output-dir "resources/public/js/out"
:optimizations :none}}]})
Normal build works ok. So when I run:
lein cljsbuild once
I get:
Successfully compiled "resources/public/js/example.js" in 0.873 seconds.
But when I try to run:
lein figwheel
Figwheel build can't seem to find my core namespace:
Compiling "resources/public/js/example.js" failed.
clojure.lang.ExceptionInfo: failed compiling file:target/figwheel_temp/dev/figwheel/connect.cljs
at clojure.core$ex_info.invoke (core.clj:4591)
Caused by: clojure.lang.ExceptionInfo: No such namespace: core, could not locate core.cljs, core.cljc, or Closure namespace "core" at line 1 target/figwheel_temp/dev/figwheel/connect.cljs
at clojure.core$ex_info.invoke (core.clj:4591)
Any ideas what could be wrong? I created a minimal github project which demonstrates the issue here:
https://github.com/auramo/figwheel-build-issue
Problem was the namespace, it should be:
:main myproject.core
As a clojure noob, I am trying to use cascalog to parse a large CSV file. Here is my minimal project.clj:
(defproject org.example/sample "1.0.0-SNAPSHOT"
:description "extract fields from a certain csv file."
:dependencies [
[cascalog "2.0.0"]
[clojure-csv/clojure-csv "2.0.1"]
]
:profiles { :dev {:dependencies [[org.apache.hadoop/hadoop-core "1.1.2"]]}}
:jvm-opts ["-Xms768m" "-Xmx768m"]
)
lein deps succeeds, but when I run (use 'cascalog.api) inside lein repl, then I get the following error:
CompilerException java.lang.RuntimeException: Unable to resolve symbol: combinations in this context, compiling:(jackknife/seq.clj:12)
Removing clojure-csv from project.clj prevents the error, but I can run (use 'clojure-csv.core) inside lein repl without error.
One other person on the internet appears to have had this problem, but has not posted a solution. What is going on here, and how should I fix it? I'd be eternally grateful if someone could help.