anchor.diff:  
   The init options may be repeated and mixed freely, but must appear before
   any main option. 
  +
  +In the case of `--compile` you may supply `--repl` or `--serve` options afterwards.
   
   Paths may be absolute or relative in the filesystem or relative to
   classpath. Classpath-relative paths have prefix of @ or @/
  
positive.code: 
  The init options may be repeated and mixed freely, but must appear before
  any main option.
  
  Paths may be absolute or relative in the filesystem or relative to
  classpath. Classpath-relative paths have prefix of @ or @/
  
negative.code: ** `-cf`, `--compile-opts` _edn_ Options to configure the build
  ** `-d`, `--output-dir` _path_ Set the output directory to use. If supplied, `cljsc_opts.edn` in that directory will be used to set ClojureScript compiler options
  ** `-re`, `--repl-env` _env_ The REPL environment to use. Built-in supported values: `nashorn`, `node`, `browser`, `rhino`. Defaults to `browser`
  ** `-ro`, `--repl-opts` _edn_ Options to configure the repl-env
  ** `-t`, `--target` _name_ The JavaScript target. Configures environment bootstrap and defaults to `browser`. Supported values: `node` or `nodejs`, `nashorn`, `webworker`, `none`
  * init options only for `--main` and `--repl`:
  ** `-e`, `--eval` _string_ Evaluate expressions in string; print non-`nil` values
  ** `-i`, `--init` _path_ Load a file or resource
  ** `-v`, `--verbose` _bool_ If `true`, will enable ClojureScript verbose logging
  * init options only for `--compile`:
  ** `-O`, `--optimizations` _level_ Set optimization level, only effective with `--compile` main option. Valid values are: `none`, `whitespace`, `simple`, `advanced`
  ** `-o`, `--output-to` _file_ Set the output compiled file
  ** `-w`, `--watch` _path_ Continuously build, only effective with the `--compile` main option
  * main options:
  ** `-` Run a script from standard input
  ** `-c`, `--compile` _ns_ Compile a namespace. If `--repl` present after namespace will launch a REPL after the compile completes
  ** `-h`, `--help`, `-?`  Print this help message and exit
  ** `-m`, `--main` _ns_ Call the `-main` function from a namespace with args
  ** `-r`, `--repl` Run a repl
  ** `-s`, `--serve` _host:port_ Start a simple web server to serve the current directory
  ** _path_ Run a script from a file or resource
  * For `--main` and `--repl`:
  ** Enters the `cljs.user` namespace
  