Leiningen: Create executable jar to run without java -jar

Question

I'm trying to understand how to package a command line application written in Clojure for distribution. I don't want users to have to use java -jar myproject.jar arg1 arg2 to run the program. PHP has something called "Phar" files, which are basically executable zip files, so they include a shebang that tells POSIX systems how to unpack and run them.

I've seen other Clojure apps that allow the jar file to be set chmod +x and then executed directly. How do they achieve this? Uberjar just seems to make a jar that requires the java -jar prefix.

have you looked on the java options like http://stackoverflow.com/a/20565393/3181392 ? — cfrick, Mar 09 '15 at 13:17

score 9 · Accepted Answer · answered Mar 09 '15 at 13:32

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You can do this using lein-bin.

answered Mar 09 '15 at 13:32

bsvingen

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score 2 · Answer 2 · answered Mar 09 '15 at 13:15

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Ah, I just found the answer to my own question. It's not standard functionality and you basically have to roll your own: https://github.com/tailrecursion/boot/blob/master/Makefile#L21

answered Mar 09 '15 at 13:15

d11wtq

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Yes, i was about to answer that, they basically append the content of the jar at the the end of the bash script and launch that with java -jar. The java launcher ignores the script content and start loading the jar where it starts, really nice. – uraimo Mar 09 '15 at 13:19

Leiningen: Create executable jar to run without java -jar

2 Answers2