Move "common/config" common types into cfgtypes.

common/config/projectName.go

Index: common/config/projectName.go
diff --git a/common/config/projectName.go b/common/config/projectName.go
deleted file mode 100644
index cd1d3bb8cbda958272258cc05fabc8c81032aac2..0000000000000000000000000000000000000000
--- a/common/config/projectName.go
+++ /dev/null
@@ -1,66 +0,0 @@
-// Copyright 2016 The LUCI Authors. All rights reserved.
-// Use of this source code is governed under the Apache License, Version 2.0
-// that can be found in the LICENSE file.
-
-package config
-
-import (
-	"errors"
-	"flag"
-	"fmt"
-)
-
-// ProjectName is a luci-config project name.
-//
-// A valid project name may only include:
-//	- Lowercase letters [a-z]
-//	- Numbers [0-9]
-//	- Hyphen (-)
-//	- Underscore (_)
-//
-// It also must begin with a letter.
-//
-// See:
-// https://github.com/luci/luci-py/blob/8e594074929871a9761d27e814541bc0d7d84744/appengine/components/components/config/common.py#L41
-type ProjectName string
-
-var _ flag.Value = (*ProjectName)(nil)
-
-// Validate returns an error if the supplied ProjectName is not a valid project
-// name.
-func (p ProjectName) Validate() error {
-	if len(p) == 0 {
-		return errors.New("cannot have empty name")
-	}
-
-	for idx, r := range p {
-		switch {
-		case r >= 'a' && r <= 'z':
-
-		case (r >= '0' && r <= '9'), r == '-', r == '_':
-			if idx == 0 {
-				return errors.New("must begin with a letter")
-			}
-
-		default:
-			return fmt.Errorf("invalid character at %d (%c)", idx, r)
-		}
-	}
-
-	return nil
-}
-
-// String implements flag.Value.
-func (p *ProjectName) String() string {
-	return string(*p)
-}
-
-// Set implements flag.Value.
-func (p *ProjectName) Set(v string) error {
-	vp := ProjectName(v)
-	if err := vp.Validate(); err != nil {
-		return err
-	}
-	*p = vp
-	return nil
-}