Add the pacman_not_found rule

thefuck/archlinux.py

@@ -11,7 +11,7 @@ def get_pkgfile(command):
     instead.
     """
     try:
-        command = command.script.strip()
+        command = command.strip()
 
         if command.startswith('sudo '):
             command = command[5:]

thefuck/rules/pacman.py

@@ -3,11 +3,11 @@ from thefuck import shells
 
 
 def match(command, settings):
-    return 'not found' in command.stderr and get_pkgfile(command)
+    return 'not found' in command.stderr and get_pkgfile(command.script)
 
 
 def get_new_command(command, settings):
-    packages = get_pkgfile(command)
+    packages = get_pkgfile(command.script)
 
     formatme = shells.and_('{} -S {}', '{}')
     return [formatme.format(pacman, package, command.script)

thefuck/rules/pacman_not_found.py

@@ -0,0 +1,24 @@
+""" Fixes wrong package names with pacman or yaourt.
+
+For example the `llc` program is in package `llvm` so this:
+    yaourt -S llc
+should be:
+    yaourt -S llvm
+"""
+
+from thefuck.utils import replace_command
+from thefuck.archlinux import archlinux_env, get_pkgfile
+
+
+def match(command, settings):
+    return (command.script.startswith(('pacman', 'sudo pacman', 'yaourt'))
+            and 'error: target not found:' in command.stderr)
+
+
+def get_new_command(command, settings):
+    pgr = command.script.split()[-1]
+
+    return replace_command(command, pgr, get_pkgfile(pgr))
+
+
+enabled_by_default, _ = archlinux_env()