Can I run my command with out lein run? - clojure

Question

I currently run a simple cli I wrote by calling: lein run my-cli-command arg --option
How can I call my command without needing to include lein run? This is what i'm after: my-cli-command arg --option
Do I need to convert it to an binary or executable and if so how?

Answer 1

As far as I know, there's no way to run just my-cli-command arg --option.
You can take lein out of the equation though by creating a Java archive:
lein uberjar
Then run the jar as you would any other:
java -jar target/my-cli-command-standalone.jar arg --option
uberjar will name the jar based on what you've called your project in project.clj, and will create a jar that relies on external dependencies, and one that doesn't (standalone).
Then, as #gary pointed out, you can stick the java - jar ... command in a .bat file, name it whatever you want, then run the bat directly. My bat-Fu is pretty weak, but there's likely a way to pass arguments to the bat and have them passed to the jar so you don't need to hard code the arguments.

Answer 2

As of Clojure 1.9 there are new CLI tools! See this guide for installation. You can create an executable script like this:
#!/usr/local/bin/clojure
(println "Hello World! from" *ns*)
(require '[clojure.walk :as walk])
(walk/postwalk-demo {:woo ::yeah})
Then make the script executable and execute it:
$ chmod +x my_script
$ ./my_script
Hello World! from #object[clojure.lang.Namespace 0x1ebea008 user]
Walked: :woo
Walked: :user/yeah
Walked: [:woo :user/yeah]
Walked: {:woo :user/yeah}
Start-up time seems improved as well. It takes a little over a second to run a trivial script (just print a string) on a recent MBP:
time ./hello
Hello World!
./hello 1.51s user 0.12s system 184% cpu 0.887 total

Answer 3

I've not used it, but I know inlein exists and it looks like what you need.
Inlein is the easiest and fastest way to run Clojure scripts. You only have to inline your dependencies, add in a shebang line, and make the script file executable.
And a minimal example:
#!/usr/bin/env inlein
'{:dependencies [[org.clojure/clojure "1.8.0"]]}
(println "hello world!")

Answer 4

You can use "binary payload" in shell script as described in https://coderwall.com/p/ssuaxa/how-to-make-a-jar-file-linux-executable
Basically you can concatenate a shell script and your uberjar in a single shell script file and execute java in the script specifying that script as the jar file on the classpath - the example comes from the linked post:
Save your runner script in stub.sh:
#!/bin/sh
MYSELF=`which "$0" 2>/dev/null`
[ $? -gt 0 -a -f "$0" ] && MYSELF="./$0"
java=java
if test -n "$JAVA_HOME"; then
java="$JAVA_HOME/bin/java"
fi
exec "$java" $java_args -jar $MYSELF "$#"
exit 1
Then concatenate it with your uberjar:
cat stub.sh my-cli-command-uberjar.jar > my-cli-command && chmod +x my-cli-command
Now you can run it directly:
./my-cli-command args...
There is also a lein plugin automating this process: lein-binplus