tools: Added go_vet tool for go files.

vigil/tools.py

@@ -789,7 +789,7 @@ TOOLS_FOR_EXTENSIONS = \
         (["a", "so"], [nm]),
         (IMAGE_EXTENSIONS, [pil, pil_half]),
         (["bash", "sh", "dash", "ksh"], [shellcheck]),
-        (["go"], [gofmt])
+        (["go"], [gofmt, go_vet])
     ]
 
 

vigil/tools.yaml

@@ -108,4 +108,11 @@ gofmt:
   url: golang-go
   executables: [gofmt]
   command: gofmt
-  success_status: normal
+  success_status: normal
+
+go_vet:
+  dependencies: [golang-go]
+  url: golang-go
+  executables: [go]
+  command: go vet
+  error_status: normal