Adding yay AUR manager to Arch Linux's commands since yaourt is unmaintained and has some security issues. (#907)

thefuck/rules/pacman_not_found.py

@@ -1,9 +1,9 @@
 """ Fixes wrong package names with pacman or yaourt.
 
 For example the `llc` program is in package `llvm` so this:
-    yaourt -S llc
+    yay -S llc
 should be:
-    yaourt -S llvm
+    yay -S llvm
 """
 
 from thefuck.utils import replace_command
@@ -12,7 +12,7 @@ from thefuck.specific.archlinux import get_pkgfile, archlinux_env
 
 def match(command):
     return (command.script_parts
-            and (command.script_parts[0] in ('pacman', 'yaourt')
+            and (command.script_parts[0] in ('pacman', 'yay', 'yaourt')
                  or command.script_parts[0:2] == ['sudo', 'pacman'])
             and 'error: target not found:' in command.output)
 

thefuck/specific/archlinux.py

@@ -32,7 +32,9 @@ def get_pkgfile(command):
 
 
 def archlinux_env():
-    if utils.which('yaourt'):
+    if utils.which('yay'):
+        pacman = 'yay'
+    elif utils.which('yaourt'):
         pacman = 'yaourt'
     elif utils.which('pacman'):
         pacman = 'sudo pacman'