gistfile1.clj

colin:/tmp/ $ cat ~/.lein/profiles.clj 
 {
   :1.2 { :dependencies [[org.clojure/clojure "1.2.0"]] }
   :1.3 { :dependencies [[org.clojure/clojure "1.3.0"]] }
   :1.4 { :dependencies [[org.clojure/clojure "1.4.0"]] }
}

colin:/tmp/ $ lein with-profile 1.3 repl
Performing task 'repl' with profile(s): '1.3'
nREPL server started on port 50952
Welcome to REPL-y!
Clojure 1.3.0
    Exit: Control+D or (exit) or (quit)
Commands: (user/help)
    Docs: (doc function-name-here)
          (find-doc "part-of-name-here")
  Source: (source function-name-here)
          (user/sourcery function-name-here)
 Javadoc: (javadoc java-object-or-class-here)
Examples from clojuredocs.org: [clojuredocs or cdoc]
          (user/clojuredocs name-here)
          (user/clojuredocs "ns-here" "name-here")

user=> *clojure-version*
{:major 1, :minor 3, :incremental 0, :qualifier nil}
user=> Bye for now!

colin:/tmp/ $ lein with-profile 1.2 repl
Performing task 'repl' with profile(s): '1.2'
nREPL server started on port 50961
Welcome to REPL-y!
Clojure 1.2.0
    Exit: Control+D or (exit) or (quit)
Commands: (user/help)
    Docs: (doc function-name-here)
          (find-doc "part-of-name-here")
  Source: (source function-name-here)
          (user/sourcery function-name-here)
 Javadoc: (javadoc java-object-or-class-here)
Examples from clojuredocs.org: [clojuredocs or cdoc]
          (user/clojuredocs name-here)
          (user/clojuredocs "ns-here" "name-here")

user=> *clojure-version*
{:major 1, :minor 2, :incremental 0, :qualifier ""}
user=> Bye for now!