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lein-cascade

A Leiningen plugin to execute cascading task dependencies. This is vaguely similar to <a href="http://en.wikipedia.org/wiki/Make_(software)">Makefiles</a> and Ant target dependencies.

Installation

You must have Leiningen 2.0 or higher to use this plugin.

Use this for user-level plugins:

Put [lein-cascade "0.1.2"] into the :plugins vector of your :user profile.

Use this for project-level plugins:

Put [lein-cascade "0.1.2"] into the :plugins vector of your project.clj.

Usage

Add a :cascade key in your project.clj - example below:

;; Inner vectors contain task name and args if any, non-vector is a dependency
:cascade {"foo"  [["clean"]]
          "bar"  ["foo"      ; triggers "foo"
                  ["javac"]]
          "baz"  ["bar"      ; triggers "bar"
                  ["test"]]
          "quux" ["bar"      ; triggers "bar"
                  ["doc"]    ; codox plugin example
                  ["uberjar"]]}

You can execute a cascade as follows:

$ lein cascade quux

Cascade name types

String cascade names are public, whereas keyword cascade names are internal. Symbols are special. See below:

Symbol - Environment variables and command-line args
String - Public cascade targets visible from command-line
Keyword - Internal cascade targets not visible from command-line

Symbols

Symbols have a special meaning. They are looked up as environment variables. For example: ["with-profile" "foo" "test" TESTNS] expects TESTNS to be an environment variable, which must be present at runtime. If no such environment variable exists, an error message would be shown.

The special symbols %, %<integer> and %& are substituted by the command line arguments. For example in lein cascade foo bar baz, % and %1 are bar and %2 is baz.

License

Distributed under the Eclipse Public License either version 1.0 or (at your option) any later version.