feat: add platform flag for ec2 image import task

.web-docs/components/post-processor/import/README.md

@@ -93,6 +93,11 @@ Optional:
   `legacy-bios` or `uefi`. If `architecture` is set to `arm64` then this value
   must be set to  `uefi`.
 
+- `platform` (string) - The operating system of the virtual machine. One of:
+  `linux` or `windows`. If `boot_mode` is set to `uefi` then this value must be 
+  set to either `windows` or `linux` depending on the operating system of the 
+  virtual machine.
+
 - `custom_endpoint_ec2` (string) - This option is useful if you use a cloud
   provider whose API is compatible with aws EC2. Specify another endpoint
   like this `https://ec2.custom.endpoint.com`.

docs/post-processors/import.mdx

@@ -103,6 +103,11 @@ Optional:
   `legacy-bios` or `uefi`. If `architecture` is set to `arm64` then this value
   must be set to  `uefi`.
 
+- `platform` (string) - The operating system of the virtual machine. One of:
+  `linux` or `windows`. If `boot_mode` is set to `uefi` then this value must be 
+  set to either `windows` or `linux` depending on the operating system of the 
+  virtual machine.
+
 - `custom_endpoint_ec2` (string) - This option is useful if you use a cloud
   provider whose API is compatible with aws EC2. Specify another endpoint
   like this `https://ec2.custom.endpoint.com`.

post-processor/import/post-processor.go

@@ -53,6 +53,7 @@ type Config struct {
 	Format          string            `mapstructure:"format"`
 	Architecture    string            `mapstructure:"architecture"`
 	BootMode        string            `mapstructure:"boot_mode"`
+	Platform        string            `mapstructure:"platform"`
 
 	ctx interpolate.Context
 }
@@ -136,6 +137,17 @@ func (p *PostProcessor) Configure(raws ...interface{}) error {
 			errs, fmt.Errorf("invalid format '%s'. Only 'ova', 'raw', 'vhd', 'vhdx', or 'vmdk' are allowed", p.config.Format))
 	}
 
+	switch p.config.Platform {
+	case "windows", "linux":
+	case "":
+		if p.config.BootMode == "uefi" {
+			errs = packersdk.MultiErrorAppend(
+				errs, fmt.Errorf("invalid platform '%s', 'platform' must be set for 'uefi' image imports", p.config.Platform))
+		}
+	default:
+		errs = packersdk.MultiErrorAppend(errs, fmt.Errorf(
+			"invalid platform '%s'. Only 'linux' and 'windows' are allowed", p.config.Platform))
+	}
 	if p.config.S3Encryption != "" && p.config.S3Encryption != "AES256" && p.config.S3Encryption != "aws:kms" {
 		errs = packersdk.MultiErrorAppend(
 			errs, fmt.Errorf("invalid s3 encryption format '%s'. Only 'AES256' and 'aws:kms' are allowed", p.config.S3Encryption))
@@ -259,6 +271,7 @@ func (p *PostProcessor) PostProcess(ctx context.Context, ui packersdk.Ui, artifa
 		},
 		Architecture: &p.config.Architecture,
 		BootMode:     &p.config.BootMode,
+		Platform:     &p.config.Platform,
 	}
 
 	if p.config.Encrypt && p.config.KMSKey != "" {