internal/boot: introduce package for booting images

The package takes the existing code from /cmd/osbuild-image-tests and
makes it available for other executables.

internal/boot/azuretest/deployment.go

@@ -0,0 +1,56 @@
+// +build integration
+
+package azuretest
+
+import (
+	"encoding/json"
+	"fmt"
+	"os"
+
+	"github.com/osbuild/osbuild-composer/cmd/osbuild-image-tests/constants"
+)
+
+// loadDeploymentTemplate loads the deployment template from the specified
+// path and return it as a "dynamically" typed object
+func loadDeploymentTemplate() (interface{}, error) {
+	f, err := os.Open(constants.TestPaths.AzureDeploymentTemplate)
+	if err != nil {
+		return nil, fmt.Errorf("cannot open the deployment file: %v", err)
+	}
+
+	defer f.Close()
+
+	var result interface{}
+
+	err = json.NewDecoder(f).Decode(&result)
+
+	if err != nil {
+		return nil, fmt.Errorf("cannot decode the deployment file: %v", err)
+	}
+
+	return result, nil
+}
+
+// struct for encoding a deployment parameter
+type deploymentParameter struct {
+	Value string `json:"value"`
+}
+
+func newDeploymentParameter(value string) deploymentParameter {
+	return deploymentParameter{Value: value}
+}
+
+// struct for encoding deployment parameters
+type deploymentParameters struct {
+	NetworkInterfaceName     deploymentParameter `json:"networkInterfaceName"`
+	NetworkSecurityGroupName deploymentParameter `json:"networkSecurityGroupName"`
+	VirtualNetworkName       deploymentParameter `json:"virtualNetworkName"`
+	PublicIPAddressName      deploymentParameter `json:"publicIPAddressName"`
+	VirtualMachineName       deploymentParameter `json:"virtualMachineName"`
+	DiskName                 deploymentParameter `json:"diskName"`
+	ImageName                deploymentParameter `json:"imageName"`
+	Location                 deploymentParameter `json:"location"`
+	ImagePath                deploymentParameter `json:"imagePath"`
+	AdminUsername            deploymentParameter `json:"adminUsername"`
+	AdminPublicKey           deploymentParameter `json:"adminPublicKey"`
+}