linting: add to Makefile & do some fixes

common/cmap.go

@@ -10,7 +10,7 @@ type CMap struct {
 
 func NewCMap() *CMap {
 	return &CMap{
-		m: make(map[string]interface{}, 0),
+		m: make(map[string]interface{}),
 	}
 }
 
@@ -48,7 +48,7 @@ func (cm *CMap) Size() int {
 func (cm *CMap) Clear() {
 	cm.l.Lock()
 	defer cm.l.Unlock()
-	cm.m = make(map[string]interface{}, 0)
+	cm.m = make(map[string]interface{})
 }
 
 func (cm *CMap) Values() []interface{} {

common/errors.go

@@ -21,7 +21,7 @@ func (se StackError) Error() string {
 // panic wrappers
 
 // A panic resulting from a sanity check means there is a programmer error
-// and some gaurantee is not satisfied.
+// and some guarantee is not satisfied.
 func PanicSanity(v interface{}) {
 	panic(Fmt("Panicked on a Sanity Check: %v", v))
 }

common/http_test.go

@@ -95,7 +95,7 @@ func TestWriteCode(t *testing.T) {
 		common.WriteCode(w, &marshalFailer{}, code)
 		wantCode := http.StatusBadRequest
 		assert.Equal(t, w.Code, wantCode, "#%d", i)
-		assert.True(t, strings.Contains(string(w.Body.Bytes()), errFooFailed.Error()),
+		assert.True(t, strings.Contains(w.Body.String(), errFooFailed.Error()),
 			"#%d: expected %q in the error message", i, errFooFailed)
 	}
 }

common/os.go

@@ -8,6 +8,7 @@ import (
 	"os"
 	"os/signal"
 	"strings"
+	"syscall"
 )
 
 var (
@@ -17,7 +18,7 @@ var (
 func TrapSignal(cb func()) {
 	c := make(chan os.Signal, 1)
 	signal.Notify(c, os.Interrupt)
-	signal.Notify(c, os.Kill)
+	signal.Notify(c, syscall.SIGTERM)
 	go func() {
 		for sig := range c {
 			fmt.Printf("captured %v, exiting...\n", sig)
@@ -83,12 +84,7 @@ func MustReadFile(filePath string) []byte {
 }
 
 func WriteFile(filePath string, contents []byte, mode os.FileMode) error {
-	err := ioutil.WriteFile(filePath, contents, mode)
-	if err != nil {
-		return err
-	}
-	// fmt.Printf("File written to %v.\n", filePath)
-	return nil
+	return ioutil.WriteFile(filePath, contents, mode)
 }
 
 func MustWriteFile(filePath string, contents []byte, mode os.FileMode) {

common/string.go

@@ -31,10 +31,7 @@ func LeftPadString(s string, totalLength int) string {
 func IsHex(s string) bool {
 	if len(s) > 2 && s[:2] == "0x" {
 		_, err := hex.DecodeString(s[2:])
-		if err != nil {
-			return false
-		}
-		return true
+		return err == nil
 	}
 	return false
 }