boot uber jar generation with stuart sierra component and clojure 1.7.0-alpha5 and above

[stijnopheide]

When executing an uber jar that has been generated with boot for an application that starts a com.stuartsierra.component with clojure-1.7.0-alpha5 (or beta1), component/start doesn't get executed.

An example project can be found here: https://github.com/stijnopheide/boot-component-uberjar

it works with clojure 1.7.0-alpha4

$ git checkout 1.7.0-alpha4
Switched to branch '1.7.0-alpha4'
$ boot build
Compiling 1/1 boot-component.core...
Writing pom.xml and pom.properties...
Adding uberjar entries...
Writing boot-component-0.1.0-BOOT.jar...
$ java -jar target/boot-component-0.1.0-BOOT.jar 
started
$

it doesn't with clojure 1.7.0-beta1 (or alpha5)

$ git checkout 1.7.0-beta1
Switched to branch '1.7.0-beta1'
$ boot build
Compiling 1/1 boot-component.core...
Writing pom.xml and pom.properties...
Adding uberjar entries...
Writing boot-component-0.1.0-BOOT.jar...
$ java -jar target/boot-component-0.1.0-BOOT.jar 
$ 

but it works with leiningen

$ lein clean && lein uberjar
Compiling boot-component.core
Created /Users/stijn/Documents/code/tryouts/boot-component/target/boot-component-0.1.0-LEININGEN.jar
Created /Users/stijn/Documents/code/tryouts/boot-component/target/boot-component-0.1.0-LEININGEN-standalone.jar
$ java -jar target/boot-component-0.1.0-LEININGEN-standalone.jar 
started
$ 

$ boot -u
#https://github.com/boot-clj/boot
#Tue Apr 21 13:18:09 CEST 2015
BOOT_CLOJURE_VERSION=1.6.0
BOOT_VERSION=2.0.0-rc14
#App version: 2.0.0-rc14

Changing the BOOT_CLOJURE_VERSION doesn't have an effect on the result, although I didn't try out all possible combinations.

[micha]

Can you see a difference in the JAR files? Like is there something missing from the boot JAR that's in the lein one?

[danielsz]

There is an example in the system library that might be useful in the context of this discussion.

https://github.com/danielsz/system/tree/master/examples/boot

[micha]

This issue has been fixed in subsequent releases of Clojure, I think. Please see danielsz/holygrail for examples of boot and system in action! Feel free to reopen if necessary :)

[flyingmachine]

I just tried using component with Clojure 1.7.0 and ran into this issue. Here's my example project: https://github.com/flyingmachine/boot-component-issue . If I change the clojure version to 1.6.0 it works fine.

Weirdly, when I try to start a component system in another project which has a ton of dependencies, it works OK. Still, a project with just clojure and component as dependencies should be able to work fine.

[flyingmachine]

correction - it looks like I was wrong when I said "when I try to start a component in another project it works OK", it's still not starting 😨