define project specific tasks in leiningen

Question

Is there a way to define rake like tasks within a project for leiningen.

I want to define a custom task in leiningen project.clj which will invoke a function in my project namespace

Theona

Your question is quite unclear for people who don't know rake (like me). Can you elaborate? Wildly guessing on what you need (thinking about make-style targets), I think you might find boot better suited to your requirements. – Gadid

Answer 1

You can define project-specific aliases, e.g.:

  :aliases {"launch" ["run" "-m" "myproject.main"]
            ;; Values from the project map can be spliced into the arguments
            ;; using :project/key keywords.
            "launch-version" ["run" "-m" "myproject.main" :project/version]
            "dumbrepl" ["trampoline" "run" "-m" "clojure.main/main"]
            ;; :pass-through-help ensures `lein my-alias help` is not converted
            ;; into `lein help my-alias`.
            "go" ^:pass-through-help ["run" "-m"]
            ;; For complex aliases, a docstring may be attached. The docstring
            ;; will be printed instead of the expansion when running `lein help`.
            "deploy!" ^{:doc "Recompile sources, then deploy if tests succeed."}
            ;; Nested vectors are supported for the "do" task
            ["do" "clean" ["test" ":integration"] ["deploy" "clojars"]]}

You should be able to combine this feature with lein-exec plugin to define an alias to run arbitrary clojure code within your project:

  :aliases {"dosmth" ["exec" "-ep" "(use 'myproject.main) (foo 42)"]}

Now you can use dosmth task with lein:

lein dosmth

which is just an alias to

lein exec -ep "(use 'myproject.main) (foo 42)"

Excoriate