When I require this lib as fs,some function doesn't work at all

[kurt-steiner]

(require '[me.raynes.fs :as fs])
(fs/chdir "/") 
Execution error (IllegalStateException) at me.raynes.fs/chdir (fs.clj:541).
Can't change/establish root binding of: *cwd* with set

[MicSokoli]

Try running that inside a with-mutable-cwd block.

(require '[me.raynes.fs :as fs])

(fs/with-mutable-cwd
  (fs/chdir "/"))

According to the docs, chdir "... only works inside of with-mutable-cwd".
http://raynes.github.io/fs/me.raynes.fs.html#var-chdir

http://raynes.github.io/fs/me.raynes.fs.html#var-with-mutable-cwd