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POHow can I make nrepl-ritz-jack-in work remotely over TRAMP / Emacs
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copied!<h2>What I want:</h2> <p>I have a clojure program on a remote site, let's call it <code>mccarthy</code>. What I want to do is connect to a <code>nrepl-ritz</code> from my laptop, preferably using <code>nrepl-ritz-jack-in</code>. The jack in works fine for a local program, but doesn't seem to connect to a remote program.</p> <h2>Attempt 1</h2> <p><kbd>C-x C-f</kbd> on <code>/mccarthy:code/program/project.clj</code></p> <p><code>(require 'nrepl-ritz)</code></p> <p><kbd>M-x</kbd> <code>nrepl-ritz-jack-in</code></p> <h2>Result</h2> <p>Emacs appears to hang. If I go to the <code>*nrepl-server*</code> buffer, I see this:</p> <pre><code>Exception in thread "main" java.lang.reflect.InvocationTargetException at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.flatland.drip.Main.invoke(Main.java:117) at org.flatland.drip.Main.start(Main.java:88) at org.flatland.drip.Main.main(Main.java:64) Caused by: java.lang.AssertionError: Assert failed: project at leiningen.ritz_nrepl$start_jpda_server.invoke(ritz_nrepl.clj:23) at leiningen.ritz_nrepl$ritz_nrepl.doInvoke(ritz_nrepl.clj:95) </code></pre> <p>(and tons of other lines, too...)</p> <p>I am using <code>drip</code> on my laptop, but not on <code>mccarthy</code>, so clearly <code>nrepl-ritz-jack-in</code> is not detecting that it's a remote file. Regular old <code>nrepl-jack-in</code> will work as expected in this case, however.</p> <h2>Attempt 2</h2> <p>I also tried starting an <code>nrepl-ritz</code> using <code>lein</code> on <code>mccarthy</code>:</p> <pre><code>mattox@mccarthy$ lein ritz-nrepl nREPL server started on port 42874 </code></pre> <p>From my laptop I forward a port so local <code>42874</code> connects to <code>42874</code> on <code>mccarthy</code>:</p> <pre><code>ssh -L 42874:localhost:42874 -N mccarthy </code></pre> <p>Then, from my local Emacs:</p> <pre><code>(require 'nrepl-ritz) </code></pre> <p><kbd>M-x</kbd> <code>nrepl</code></p> <p>Host: <code>127.0.0.1</code></p> <p>Port: <code>42874</code></p> <p>This gives me a connection:</p> <pre><code>; nREPL 0.1.7-preview user> </code></pre> <p>So to test it out, I run</p> <p><kbd>M-x</kbd> <code>nrepl-ritz-threads</code></p> <p>It gives me a nice table of threads.</p> <p><kbd>M-x</kbd> <code>nrepl-ritz-break-on-exception</code></p> <pre><code>user> (/ 1 0) </code></pre> <h2>Result</h2> <p>This hangs, but sometimes shows a hidden debugging buffer with some restarts available. If I tell it to pass the exception back to the program, it never gives control back to the REPL.</p> <p>I've done plenty of searches but have not been able to get anything more specific than "make sure lein is on your path" (And I did do that, on both machines...).</p>

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