respect ForceColor and environment variables over OS check

Author: ceriath

text_formatter.go

@@ -91,7 +91,7 @@ func (f *TextFormatter) init(entry *Entry) {
 }
 
 func (f *TextFormatter) isColored() bool {
-	isColored := f.ForceColors || f.isTerminal
+	isColored := f.ForceColors || (f.isTerminal && (runtime.GOOS != "windows"))
 
 	if f.EnvironmentOverrideColors {
 		if force, ok := os.LookupEnv("CLICOLOR_FORCE"); ok && force != "0" {
@@ -103,7 +103,7 @@ func (f *TextFormatter) isColored() bool {
 		}
 	}
 
-	return isColored && !f.DisableColors && (runtime.GOOS != "windows")
+	return isColored && !f.DisableColors
 }
 
 // Format renders a single log entry

text_formatter_test.go

@@ -444,7 +444,7 @@ func TestTextFormatterIsColored(t *testing.T) {
 				os.Setenv("CLICOLOR_FORCE", val.clicolorForceVal)
 			}
 			res := tf.isColored()
-			if runtime.GOOS == "windows" {
+			if runtime.GOOS == "windows" && !tf.ForceColors && !val.clicolorForceIsSet {
 				assert.Equal(subT, false, res)
 			} else {
 				assert.Equal(subT, val.expectedResult, res)