Tutorial apt_repo issue

[giuliano108]

I'm following the tutorial:

spire/doc/tutorial.md

Line 71 in 3ff1a18

(apt-repo :present "ppa:wireguard/wireguard")

This snippet...

; [..]
(ssh {:username username
      :hostname hostname}
     (apt-repo :present "ppa:wireguard/wireguard"))

...produces a NPE:

click to expand

$ spire test.clj
test.clj:7 (apt-repo :present "ppa:wireguard/wireguard")
Exception in thread "main" java.lang.NullPointerException
        at clojure.string$starts_with_QMARK_.invokeStatic(string.clj:364)
        at spire.module.apt_repo$fn__25035.invokeStatic(apt_repo.clj:38)
        at spire.module.apt_repo$fn__25035.invoke(apt_repo.clj:38)
        at clojure.lang.MultiFn.invoke(MultiFn.java:234)
        at spire.module.apt_repo$apt_repo_STAR_.invokeStatic(apt_repo.clj:164)
        at spire.module.apt_repo$apt_repo_STAR_.doInvoke(apt_repo.clj:159)
        at clojure.lang.RestFn.invoke(RestFn.java:421)
        at sci.impl.vars.SciVar.invoke(vars.cljc:327)
        at sci.impl.analyzer$return_call$reify__4569.eval(analyzer.cljc:1149)
        at sci.impl.evaluator$eval_let$fn__2076.invoke(evaluator.cljc:65)
        at sci.impl.evaluator$eval_let.invokeStatic(evaluator.cljc:56)
        at sci.impl.analyzer$analyze_let_STAR_$reify__4237.eval(analyzer.cljc:492)
        at sci.impl.evaluator$eval_try.invokeStatic(evaluator.cljc:125)
        at sci.impl.analyzer$analyze_try$reify__4320.eval(analyzer.cljc:741)
        at sci.impl.analyzer$return_do$reify__3600.eval(analyzer.cljc:133)
        at sci.impl.analyzer$return_do$reify__3600.eval(analyzer.cljc:133)
        at sci.impl.evaluator$eval_try.invokeStatic(evaluator.cljc:125)
        at sci.impl.analyzer$analyze_try$reify__4320.eval(analyzer.cljc:741)
        at sci.impl.analyzer$return_do$reify__3600.eval(analyzer.cljc:133)
        at sci.impl.evaluator$eval_let.invokeStatic(evaluator.cljc:74)
        at sci.impl.analyzer$analyze_let_STAR_$reify__4237.eval(analyzer.cljc:492)
        at sci.impl.evaluator$eval_let.invokeStatic(evaluator.cljc:74)
        at sci.impl.analyzer$analyze_let_STAR_$reify__4237.eval(analyzer.cljc:492)
        at sci.impl.evaluator$eval_try.invokeStatic(evaluator.cljc:125)
        at sci.impl.analyzer$analyze_try$reify__4320.eval(analyzer.cljc:741)
        at sci.impl.evaluator$eval_let.invokeStatic(evaluator.cljc:74)
        at sci.impl.analyzer$analyze_let_STAR_$reify__4237.eval(analyzer.cljc:492)
        at sci.impl.interpreter$eval_form.invokeStatic(interpreter.cljc:39)
        at sci.impl.interpreter$eval_string_STAR_.invokeStatic(interpreter.cljc:61)
        at sci.core$eval_string_STAR_.invokeStatic(core.cljc:235)
        at spire.eval$evaluate.invokeStatic(eval.clj:87)
        at spire.core$_main.invokeStatic(core.clj:85)
        at spire.core$_main.doInvoke(core.clj:59)
        at clojure.lang.RestFn.applyTo(RestFn.java:137)
        at spire.core.main(Unknown Source)

After some source diving (the opaque error didn't help with understanding what was going on), I think I found that the apt-repo module invocation should be like below instead:

(ssh {:username username
      :hostname hostname}
     (apt-repo :present {:repo "ppa:wireguard/wireguard"}))

This gets me past the NPE. The module still fails because Wireguard is now officially included in Ubuntu, but that's a different issue. 😉

Thanks for Spire! I'll be watching the project, being able to do configuration management in Clojure, "at the REPL", is an amazing prospect.