Adding this package to your project enables Log4j2 to log to the Cider REPL.
As of 6/22/2019 it appears newer versions of the Emacs Cider REPL no longer need this.
See dependencies
Create a log4j2.xml in your resources or test-resources directory
specifying the appender in the configuration element:
<?xml version="1.0" encoding="UTF-8"?>
<configuration packages="com.zensols.clojure.log"
status="OFF" monitorInterval="5">
<appenders>
<clojure name="repl">
<patternLayout pattern="%d{yyyy-MM-dd HH:mm:ss.S}: %c{1}: %m%n"/>
</clojure>
</appenders>
<loggers>
<logger name="com.example" level="info"/>
<root level="warn">
<appenderRef ref="repl"/>
</root>
</loggers>
</configuration>This project includes slf4j and could conflict with other dependencies, in
which case you'll want to exclude them (see below). You also won't need this
package outside the REPL, in which case you could add it as a dev profile.
In your project.clj:
(defproject example/project "0.1.0-SNAPSHOT"
:exclusions [org.slf4j/slf4j-log4j12
ch.qos.logback/logback-classic]
:profiles {:dev {:dependencies
[com.zensols/clj-append "1.1.0"]}})Each time you invoke the REPL you need to give the logger the REPL's *out* reference:
user> (com.zensols.clojure.log.ClojureAppender/setWriter *out*)This is a drag, so you could put this in your ~/.emacs.d/init.el file:
(defun clj-append-clojure-connected ()
(let ((buf (first
(remove* nil (buffer-list)
:test-not #'(lambda (a b)
(string-match "^\*cider-repl" (buffer-name b)))))))
(save-excursion
(set-buffer buf)
(goto-char (point-max))
(insert "(com.zensol.clojures.log.ClojureAppender/setWriter *out*)")
(cider-repl-return))))
(add-hook 'cider-connected-hook 'clj-append-clojure-connected)More documentation:
Copyright © 2016 Paul Landes
GNU Lesser General Public License, Version 3.0