[cbuild2cmake] Enforce toolchain registration environment variables

pkg/inittest/inittest.go

@@ -48,13 +48,13 @@ func TestInitialization(testRoot string) {
 func ClearToolchainRegistration() {
 	// Unset environment variables
 	systemEnvVars := os.Environ()
-	pattern := regexp.MustCompile(`(\w+)_TOOLCHAIN_(\d+)_(\d+)_(\d+)=(.*)`)
+	pattern := regexp.MustCompile(`((\w+)_TOOLCHAIN_(\d+)_(\d+)_(\d+))=(.*)`)
 	for _, systemEnvVar := range systemEnvVars {
 		matched := pattern.FindAllStringSubmatch(systemEnvVar, -1)
 		if matched == nil {
 			continue
 		}
-		os.Unsetenv(systemEnvVar)
+		os.Unsetenv(matched[0][1])
 	}
 }
 

pkg/maker/toolchain.go

@@ -119,6 +119,10 @@ func (m *Maker) ProcessToolchain() error {
 				registeredVersions = append(registeredVersions, version)
 			}
 		}
+		if len(registeredVersions) == 0 {
+			err := errors.New("compiler registration environment variable missing, format: " + contextToolchain + "_TOOLCHAIN_<major>_<minor>_<patch>")
+			return err
+		}
 		sort.Sort(sort.Reverse(semver.Collection(registeredVersions)))
 
 		// Get latest compatible registered version

pkg/maker/toolchain_test.go

@@ -23,9 +23,20 @@ func TestToolchain(t *testing.T) {
 	assert := assert.New(t)
 	var m maker.Maker
 
-	// Update environment variables
+	// Clear environment variables
 	m.EnvVars = utils.UpdateEnvVars(m.InstallConfigs.BinPath, m.InstallConfigs.EtcPath)
 	inittest.ClearToolchainRegistration()
+
+	t.Run("test missing environment variables", func(t *testing.T) {
+		inittest.ClearToolchainRegistration()
+		m.Cbuilds = make([]maker.Cbuild, 1)
+		m.Cbuilds[0].BuildDescType.Compiler = "AC6@>=6.22.0"
+		err := m.ProcessToolchain()
+		assert.Error(err)
+		assert.ErrorContains(err, "compiler registration environment variable missing, format: AC6_TOOLCHAIN_<major>_<minor>_<patch>")
+	})
+
+	// Update environment variables
 	absTestRoot, _ := filepath.Abs(testRoot)
 	absTestRoot = filepath.ToSlash(absTestRoot)
 	os.Setenv("AC6_TOOLCHAIN_6_19_0", path.Join(absTestRoot, "run/path/to/ac619/bin"))