Add a --no-color flag to remove color codes from output

cmd/msg.go

diff --git a/cmd/msg.go b/cmd/msg.go
index 56b6942..d2f6787 100644
--- a/cmd/msg.go
+++ b/cmd/msg.go
@@ -25,6 +25,9 @@
 // The following will print the string "Foo" in yellow:
 //     fmt.Print(Color(Yellow, "Foo"))
 func Color(code, msg string) string {
+	if NoColor {
+		return msg
+	}
 	return fmt.Sprintf("\033[%sm%s\033[m", code, msg)
 }
 

cmd/util.go

diff --git a/cmd/util.go b/cmd/util.go
index 5527153..9bc1c96 100644
--- a/cmd/util.go
+++ b/cmd/util.go
@@ -16,6 +16,7 @@
 // Quiet, when set to true, can suppress Info and Debug messages.
 var Quiet = false
 var IsDebugging = false
+var NoColor = false
 
 // BeQuiet supresses Info and Debug messages.
 func BeQuiet(c cookoo.Context, p *cookoo.Params) (interface{}, cookoo.Interrupt) {
@@ -24,6 +25,13 @@
 	return Quiet, nil
 }
 
+// CheckColor turns off the colored output (and uses plain text output) for
+// logging depending on the value of the "no-color" flag.
+func CheckColor(c cookoo.Context, p *cookoo.Params) (interface{}, cookoo.Interrupt) {
+	NoColor = p.Get("no-color", false).(bool)
+	return NoColor, nil
+}
+
 // ReadyToGlide fails if the environment is not sufficient for using glide.
 //
 // Most importantly, it fails if glide.yaml is not present in the current

glide.go

diff --git a/glide.go b/glide.go
index e1456a0..89be05c 100644
--- a/glide.go
+++ b/glide.go
@@ -94,6 +94,10 @@
 			Name:  "debug",
 			Usage: "Print Debug messages (verbose)",
 		},
+		cli.BoolFlag{
+			Name:  "no-color",
+			Usage: "Turn off colored output for log messages",
+		},
 	}
 	app.CommandNotFound = func(c *cli.Context, command string) {
 		cxt.Put("os.Args", os.Args)
@@ -419,6 +423,7 @@
 func setupHandler(c *cli.Context, route string, cxt cookoo.Context, router *cookoo.Router) {
 	cxt.Put("q", c.GlobalBool("quiet"))
 	cxt.Put("debug", c.GlobalBool("debug"))
+	cxt.Put("no-color", c.GlobalBool("no-color"))
 	cxt.Put("yaml", c.GlobalString("yaml"))
 	cxt.Put("cliArgs", c.Args())
 	if err := router.HandleRequest(route, cxt, false); err != nil {
@@ -433,6 +438,8 @@
 		Does(cmd.BeQuiet, "quiet").
 		Using("quiet").From("cxt:q").
 		Using("debug").From("cxt:debug").
+		Does(cmd.CheckColor, "no-color").
+		Using("no-color").From("cxt:no-color").
 		Does(cmd.VersionGuard, "v")
 
 	reg.Route("@ready", "Prepare for glide commands.").