Add pkg/parsers/architecture and pkg/platform

Signed-off-by: Vincent Demeester <vincent@sbr.pm>

platform/architecture_linux.go

@@ -0,0 +1,28 @@
+// Package platform provides helper function to get the runtime architecture
+// for different platforms.
+package platform
+
+import (
+	"syscall"
+)
+
+// GetRuntimeArchitecture get the name of the current architecture (x86, x86_64, …)
+func GetRuntimeArchitecture() (string, error) {
+	utsname := &syscall.Utsname{}
+	if err := syscall.Uname(utsname); err != nil {
+		return "", err
+	}
+	return charsToString(utsname.Machine), nil
+}
+
+func charsToString(ca [65]int8) string {
+	s := make([]byte, len(ca))
+	var lens int
+	for ; lens < len(ca); lens++ {
+		if ca[lens] == 0 {
+			break
+		}
+		s[lens] = uint8(ca[lens])
+	}
+	return string(s[0:lens])
+}