Use inheritenv to find non-global spago (#33)

Currently, spago could only be detected if it was installed
globally. This commit utilised inheritenv to allow spago to be found
in the user's environment also. This is useful for when someone is
developing with spago in an ephermeral shell, as provided by nix.

Add inheritenv to package requires list

Fix linebreak in package requires

Bump emacs dependency to version 25.1

Author: jeslie0

Diff for: psci.el

@@ -5,7 +5,7 @@
 ;; Author: Antoine R. Dumont <eniotna.t AT gmail.com>
 ;; Maintainer: Antoine R. Dumont <eniotna.t AT gmail.com>
 ;; Version: 0.0.6
-;; Package-Requires: ((emacs "24.4") (purescript-mode "13.10") (dash "2.9.0"))
+;; Package-Requires: ((emacs "25.1") (purescript-mode "13.10") (dash "2.9.0") (inheritenv "0.2"))
 ;; Keywords: languages purescript psci repl
 ;; URL: https://github.com/purescript-emacs/emacs-psci
 
@@ -51,6 +51,7 @@
 (require 'comint)
 (require 'dash)
 (require 'purescript-font-lock)
+(require 'inheritenv)
 
 ;; constants or variables
 
@@ -122,9 +123,9 @@ When FILENAME is nil or not a real file, returns nil."
   "Find extra source path globs using purescript package tools,if they appear to be used."
   (cond
    ((file-exists-p "psc-package.json")
-    (process-lines (psci--executable-find-relative psci/psc-package-path) "sources"))
+    (inheritenv (process-lines (psci--executable-find-relative psci/psc-package-path) "sources")))
    ((or (file-exists-p "spago.dhall") (file-exists-p "spago.yaml"))
-    (process-lines (psci--executable-find-relative psci/spago-path) "sources" "--quiet"))))
+    (inheritenv (process-lines (psci--executable-find-relative psci/spago-path) "sources")))))
 
 (defun psci--executable-find-relative (path)
   "If PATH is a relative path to an executable, return its full path.