introduce basic fact collection

client/vendor/github.com/zcalusic/sysinfo/util.go

@@ -0,0 +1,26 @@
+// Copyright © 2016 Zlatko Čalušić
+//
+// Use of this source code is governed by an MIT-style license that can be found in the LICENSE file.
+
+package sysinfo
+
+import (
+	"os"
+	"strings"
+)
+
+// Read one-liner text files, strip newline.
+func slurpFile(path string) string {
+	data, err := os.ReadFile(path)
+	if err != nil {
+		return ""
+	}
+
+	// Trim spaces & \u0000 \uffff
+	return strings.Trim(string(data), " \r\n\t\u0000\uffff")
+}
+
+// Write one-liner text files, add newline, ignore errors (best effort).
+func spewFile(path string, data string, perm os.FileMode) {
+	_ = os.WriteFile(path, []byte(data+"\n"), perm)
+}