Refactor package print into out to fix failing predeclared linter

pkg/out/print.go

@@ -0,0 +1,59 @@
+// Package out implements different outputs for git-list command
+package out
+
+import (
+	"fmt"
+	"strings"
+)
+
+const (
+	head = "HEAD"
+)
+
+// Printable represents a repository which status can be printed.
+type Printable interface {
+	Path() string
+	Current() string
+	Branches() []string
+	BranchStatus(branch string) string
+	WorkTreeStatus() string
+	Remote() string
+	Errors() []string
+}
+
+// Errors returns a printable list of errors from the slice of Printables or an empty string if there are no errors.
+// It's meant to be appended at the end of Print() result.
+func Errors(repos []Printable) string {
+	errors := []string{}
+
+	for _, repo := range repos {
+		errors = append(errors, repo.Errors()...)
+	}
+
+	if len(errors) == 0 {
+		return ""
+	}
+
+	var str strings.Builder
+	str.WriteString(red("\nOops, errors happened when loading repository status:\n"))
+	str.WriteString(strings.Join(errors, "\n"))
+
+	return str.String()
+}
+
+// TODO: not sure if this works on windows. See https://github.com/mattn/go-colorable
+func red(str string) string {
+	return fmt.Sprintf("\033[1;31m%s\033[0m", str)
+}
+
+func green(str string) string {
+	return fmt.Sprintf("\033[1;32m%s\033[0m", str)
+}
+
+func blue(str string) string {
+	return fmt.Sprintf("\033[1;34m%s\033[0m", str)
+}
+
+func yellow(str string) string {
+	return fmt.Sprintf("\033[1;33m%s\033[0m", str)
+}