Feature/enable log levels (#19)

Implement log levels for pkg tlog

pkg/cmd/download.go

@@ -17,6 +17,7 @@ import (
 	"github.com/tmrts/boilr/pkg/host"
 	"github.com/tmrts/boilr/pkg/util/exit"
 	"github.com/tmrts/boilr/pkg/util/osutil"
+	"github.com/tmrts/boilr/pkg/util/tlog"
 	"github.com/tmrts/boilr/pkg/util/validate"
 )
 
@@ -98,6 +99,8 @@ var Download = &cli.Command{
 	Short: "Download a project template from a github repository to template registry",
 	// FIXME Half-Updates leave messy templates
 	Run: func(c *cli.Command, args []string) {
+		tlog.SetLogLevel(GetStringFlag(c, "log-level"))
+
 		MustValidateArgs(args, []validate.Argument{
 			{"template-repo", validate.UnixPath},
 			{"template-tag", validate.Alphanumeric},

pkg/cmd/flags.go

@@ -7,3 +7,7 @@ import cli "github.com/spf13/cobra"
 func GetBoolFlag(c *cli.Command, name string) bool {
 	return c.PersistentFlags().Lookup(name).Value.String() == "true"
 }
+
+func GetStringFlag(c *cli.Command, name string) string {
+	return c.PersistentFlags().Lookup(name).Value.String()
+}

pkg/cmd/root.go

@@ -22,6 +22,7 @@ func Run() {
 	Template.AddCommand(Delete)
 
 	Download.PersistentFlags().BoolP("force", "f", false, "Overwrite existing template with the same name")
+	Download.PersistentFlags().StringP("log-level", "l", "error", "log-level for output")
 	Template.AddCommand(Download)
 
 	List.PersistentFlags().BoolP("dont-prettify", "", false, "Print only the template names without fancy formatting")
@@ -33,6 +34,7 @@ func Run() {
 	Template.AddCommand(Save)
 
 	Use.PersistentFlags().BoolP("use-defaults", "f", false, "Uses default values in project.json instead of prompting the user")
+	Use.PersistentFlags().StringP("log-level", "l", "error", "log-level for output")
 	Template.AddCommand(Use)
 
 	Template.AddCommand(Validate)

pkg/cmd/use.go

@@ -12,6 +12,7 @@ import (
 	"github.com/tmrts/boilr/pkg/template"
 	"github.com/tmrts/boilr/pkg/util/exit"
 	"github.com/tmrts/boilr/pkg/util/osutil"
+	"github.com/tmrts/boilr/pkg/util/tlog"
 	"github.com/tmrts/boilr/pkg/util/validate"
 )
 
@@ -32,6 +33,8 @@ var Use = &cli.Command{
 	Use:   "use <template-tag> <target-dir>",
 	Short: "Execute a project template in the given directory",
 	Run: func(cmd *cli.Command, args []string) {
+		tlog.SetLogLevel(GetStringFlag(cmd, "log-level"))
+
 		MustValidateArgs(args, []validate.Argument{
 			{"template-tag", validate.UnixPath},
 			{"target-dir", validate.UnixPath},

pkg/cmd/version.go

@@ -15,6 +15,8 @@ var Version = &cli.Command{
 	Use:   "version",
 	Short: "Show the boilr version information",
 	Run: func(c *cli.Command, args []string) {
+		tlog.SetLogLevel(GetStringFlag(c, "log-level"))
+
 		MustValidateArgs(args, []validate.Argument{})
 
 		shouldntPrettify := GetBoolFlag(c, "dont-prettify")

pkg/util/tlog/log.go

@@ -29,6 +29,30 @@ const (
 	QuestionMark = "?"
 )
 
+const (
+    LevelDebug = 32
+    LevelFatal = 16
+    LevelError = 8
+    LevelWarn = 4
+    LevelInfo = 2
+    LevelSuccess = 1
+)
+
+var LogLevel uint16
+
+func SetLogLevel(LogLevelString string) {
+    switch strings.ToLower(LogLevelString) {
+    case "debug":
+		LogLevel |= (LevelSuccess | LevelError | LevelFatal | LevelWarn | LevelInfo | LevelDebug)
+	case "info":
+        LogLevel |= (LevelSuccess | LevelError | LevelFatal | LevelWarn | LevelInfo)
+	case "warn":
+        LogLevel |= (LevelSuccess | LevelError | LevelFatal | LevelWarn)
+	default:
+        LogLevel |= (LevelSuccess | LevelError | LevelFatal)
+    }
+}
+
 // TODO add log levels
 func coloredPrintMsg(icon string, msg string, iC color.Attribute, mC color.Attribute) {
 	fmt.Println(
@@ -38,6 +62,10 @@ func coloredPrintMsg(icon string, msg string, iC color.Attribute, mC color.Attri
 
 // Debug logs the given message as a debug message.
 func Debug(msg string) {
+	if 0 == LogLevel & LevelDebug {
+		return
+	}
+
 	coloredPrintMsg(DebugMark, msg, color.FgYellow, color.FgYellow)
 }
 
@@ -48,11 +76,19 @@ func Success(msg string) {
 
 // Info logs the given message as a info message.
 func Info(msg string) {
+	if 0 == LogLevel & LevelInfo {
+		return
+	}
+
 	coloredPrintMsg(InfoMark, msg, color.FgWhite, color.FgBlue)
 }
 
 // Warn logs the given message as a warn message.
 func Warn(msg string) {
+	if 0 == LogLevel & LevelWarn {
+		return
+	}
+
 	coloredPrintMsg(WarnMark, msg, color.FgMagenta, color.FgMagenta)
 }