Extract ReleaseType from zypper output

This is added to match original behavior for custom/OEM release types.

internal/connect/product.go

@@ -17,7 +17,8 @@ type Product struct {
 	IsBase  bool   `xml:"isbase,attr" json:"base"`
 
 	FriendlyName string `json:"friendly_name,omitempty"`
-	ReleaseType  string `json:"release_type,omitempty"`
+	ReleaseType  string `xml:"registerrelease,attr" json:"release_type,omitempty"`
+	ProductLine  string `xml:"productline,attr"`
 	Available    bool   `json:"available"`
 	Free         bool   `json:"free"`
 	Recommended  bool   `json:"recommended"`

internal/connect/zypper.go

@@ -2,11 +2,15 @@ package connect
 
 import (
 	"encoding/xml"
+	"fmt"
+	"os"
+	"path/filepath"
 	"strings"
 )
 
 const (
 	zypperPath = "/usr/bin/zypper"
+	oemPath    = "/var/lib/suseRegister/OEM"
 )
 
 const (
@@ -58,6 +62,26 @@ func installedProducts() ([]Product, error) {
 	return parseProductsXML(output)
 }
 
+// get first line of OEM file if present
+func oemReleaseType(productLine string) (string, error) {
+	if productLine == "" {
+		return "", fmt.Errorf("empty productline")
+	}
+	oemFile := filepath.Join(CFG.FsRoot, oemPath, productLine)
+	if !fileExists(oemFile) {
+		return "", fmt.Errorf("OEM file not found: %v", oemFile)
+	}
+	data, err := os.ReadFile(oemFile)
+	if err != nil {
+		return "", err
+	}
+	lines := strings.Split(string(data), "\n")
+	if len(lines) == 0 {
+		return "", fmt.Errorf("empty OEM file: %v", oemFile)
+	}
+	return strings.TrimSpace(lines[0]), nil
+}
+
 // parseProductsXML returns products parsed from zypper XML
 func parseProductsXML(xmlDoc []byte) ([]Product, error) {
 	var products struct {
@@ -66,6 +90,12 @@ func parseProductsXML(xmlDoc []byte) ([]Product, error) {
 	if err := xml.Unmarshal(xmlDoc, &products); err != nil {
 		return []Product{}, err
 	}
+	// override ProductType with OEM value if defined
+	for i, p := range products.Products {
+		if oemValue, err := oemReleaseType(p.ProductLine); err == nil {
+			products.Products[i].ReleaseType = oemValue
+		}
+	}
 	return products.Products, nil
 }
 

internal/connect/zypper_test.go

@@ -1,6 +1,8 @@
 package connect
 
 import (
+	"os"
+	"path/filepath"
 	"testing"
 )
 
@@ -17,6 +19,40 @@ func TestParseProductsXML(t *testing.T) {
 	}
 }
 
+func TestParseProductsXML_ReleaseType(t *testing.T) {
+	CFG.FsRoot = t.TempDir()
+	// write test OEM file
+	testRT := "SLES-OEM-TEST"
+	oemDir := filepath.Join(CFG.FsRoot, oemPath)
+	if err := os.MkdirAll(oemDir, 0755); err != nil {
+		t.Fatalf("Error creating OEM dir: %v", err)
+	}
+	if err := os.WriteFile(filepath.Join(oemDir, "sles"), []byte(testRT), 0600); err != nil {
+		t.Fatalf("Error writing OEM file: %v", err)
+	}
+
+	products, err := parseProductsXML(readTestFile("products-rt.xml", t))
+	if err != nil {
+		t.Errorf("Unexpected error: %s", err)
+	}
+
+	if products[0].ReleaseType != "" {
+		t.Errorf("Expected empty ReleaseType Got %v", products[0].ReleaseType)
+	}
+	if products[1].ReleaseType != testRT {
+		t.Errorf("Expected ReleaseType=%v Got %v", testRT, products[1].ReleaseType)
+	}
+	if products[2].ReleaseType != testRT {
+		t.Errorf("Expected ReleaseType=%v Got %v", testRT, products[2].ReleaseType)
+	}
+	if products[3].ReleaseType != "rel2" {
+		t.Errorf("Expected ReleaseType=rel2 Got %v", products[3].ReleaseType)
+	}
+	if products[4].ReleaseType != "" {
+		t.Errorf("Expected empty ReleaseType Got %v", products[4].ReleaseType)
+	}
+}
+
 func TestParseServicesXML(t *testing.T) {
 	services, err := parseServicesXML(readTestFile("services.xml", t))
 	if err != nil {

testdata/products-rt.xml

@@ -0,0 +1,10 @@
+<?xml version='1.0'?>
+<stream>
+  <product-list>
+    <product name="suse-openstack-cloud" version="8" release="0" arch="x86_64" productline="suse-openstack-cloud" registerrelease=""></product>
+    <product name="SLES" version="12.5" release="0" arch="x86_64" productline="sles" registerrelease=""></product>
+    <product name="SLES-OEM-test1" productline="sles" registerrelease="rel1"></product>
+    <product name="SLES-OEM-test2" productline="" registerrelease="rel2"></product>
+    <product name="SLES-OEM-test3" productline="" registerrelease=""></product>
+  </product-list>
+</stream>