diff --git a/ui/build/context.go b/ui/build/context.go
index 8144e58..f85bb6c 100644
--- a/ui/build/context.go
+++ b/ui/build/context.go
@@ -95,3 +95,10 @@
 		c.Tracer.ImportNinjaLog(c.Thread, filename, startOffset)
 	}
 }
+
+func (c ContextImpl) IsTerminal() bool {
+	if term, ok := os.LookupEnv("TERM"); ok {
+		return term != "dumb" && isTerminal(c.Stdout()) && isTerminal(c.Stderr())
+	}
+	return false
+}