--- a/checker.py	Sun Jul 24 09:08:17 2016 +0800
+++ b/checker.py	Sun Jul 24 09:24:14 2016 +0800
@@ -13,27 +13,32 @@
 from candolint.utils import rel, timestamp
 
 
-def run_ignore_codes(fn, args, codes):
+def run_ignore_codes(fn, args, codes, **kwargs):
     try:
-        return fn(args)
+        return fn(args, **kwargs)
     except CalledProcessError as e:
         if e.returncode not in codes:
             raise
         return e.output
 
 
-def run(args, silent=False, get_output=False, ignore_codes=None):
+def run(args, silent=False, get_output=False, ignore_codes=None, env=None):
     if get_output:
         fn = check_output
     else:
         fn = check_call
+    if env:
+        full_env = os.environ.copy()
+        full_env.update(env)
+    else:
+        full_env = None
     try:
         if not silent:
             print('$ ' + ' '.join(args))
         if ignore_codes:
-            result = run_ignore_codes(fn, args, ignore_codes)
+            result = run_ignore_codes(fn, args, ignore_codes, env=full_env)
         else:
-            result = fn(args)
+            result = fn(args, env=full_env)
         if get_output:
             return result
         else:
@@ -74,6 +79,15 @@
     return ok
 
 
+def combined_env(lenv, penv):
+    if lenv and penv:
+        env = lenv.copy()
+        env.update(penv)
+    else:
+        env = lenv or penv
+    return env
+
+
 def git_clone(url, dest):
     return run(['git', 'clone', url, dest])
 
@@ -211,8 +225,10 @@
             if not run(item):
                 return False
 
-        if 'version' in lc and not run(lc['exec'] + lc['version']):
-            return False
+        if 'version' in lc:
+            env = combined_env(lc.get('env'), linter.get('env'))
+            if not run(lc['exec'] + lc['version'], env=env):
+                return False
 
     print('# C&O linters installed: {}'.format(' '.join(linter_config.keys())))
 
@@ -238,7 +254,8 @@
             flags = lc.get('flags', []) + linter.get('flags', [])
             pf = lc.get('post_flags', []) + linter.get('post_flags', [])
             codes = lc.get('codes', (1,))
-            if not run(cmd + flags + [f] + pf, ignore_codes=codes):
+            env = combined_env(lc.get('env'), linter.get('env'))
+            if not run(cmd + flags + [f] + pf, ignore_codes=codes, env=env):
                 return False
 
     return True