CI: use gosumcheck to check exclusiveness of switch-case

https://github.com/haya14busa/gosum

Author: haya14busa

.travis.yml

@@ -10,6 +10,7 @@ install:
   - go get github.com/golang/lint/golint
   - go get honnef.co/go/unused/cmd/unused
   - go get github.com/haya14busa/goverage
+  - go get github.com/haya14busa/gosum/cmd/gosumcheck
 
 before_script:
   - vim --cmd version --cmd quit
@@ -19,6 +20,7 @@ script:
   - goverage -coverprofile=coverage.txt ./...
   - vim -u NONE -N --cmd "let &rtp .= ',' . getcwd()" -S go/generate.vim -c ":q"
   - (! git diff | grep '^') # check diff
+  - gosumcheck ./...
 
 after_success:
   - bash <(curl -s https://codecov.io/bash)

compiler/compiler.go

@@ -135,6 +135,9 @@ func (c *Compiler) compileExcommand(node ast.ExCommand) error {
 		c.compileEchohl(n)
 	case *ast.Execute:
 		c.compileExecute(n)
+	case *ast.EndFor, *ast.EndIf, *ast.Finally, *ast.EndFunction, *ast.EndTry,
+		*ast.EndWhile, *ast.Catch, *ast.Else, *ast.ElseIf:
+		return fmt.Errorf("compileExcommand: unexpected Node: %v", n)
 	}
 	return nil
 }