cloudapi: Add support for depsolving a blueprint + image type

This uses the blueprint and the image type's manifest with a minimal
imageRequest to get the package sets to use for depsolving, instead of
just using the packages in the blueprint.

This does not work with iot image types that require an ostree url.
Depsolving iot commits doesn't make sense anyway, since the blueprint
packages have no effect on it.

Includes simple tests for depsolving with image type, and returning an
error if the image type isn't recognized.

Related: RHEL-60125

internal/cloudapi/v2/depsolve.go

@@ -4,9 +4,13 @@ package v2
 
 import (
 	"context"
+	"crypto/rand"
 	"fmt"
+	"math"
+	"math/big"
 	"time"
 
+	"github.com/osbuild/blueprint/pkg/blueprint"
 	"github.com/osbuild/images/pkg/distrofactory"
 	"github.com/osbuild/images/pkg/reporegistry"
 	"github.com/osbuild/images/pkg/rpmmd"
@@ -56,14 +60,44 @@ func (request *DepsolveRequest) Depsolve(df *distrofactory.Factory, rr *reporegi
 		}
 	}
 
-	// Send the depsolve request to the worker
 	packageSet := make(map[string][]rpmmd.PackageSet, 1)
-	packageSet["depsolve"] = []rpmmd.PackageSet{
-		{
-			Include:        bp.GetPackages(),
-			EnabledModules: bp.GetEnabledModules(),
-			Repositories:   repos,
-		},
+
+	// If there is an optional image_type we use manifest to setup the package/repo list
+	if request.ImageType != nil {
+		imageType, err := distroArch.GetImageType(imageTypeFromApiImageType(*request.ImageType, distroArch))
+		if err != nil {
+			return nil, HTTPError(ErrorUnsupportedImageType)
+		}
+
+		// use the same seed for all images so we get the same IDs
+		bigSeed, err := rand.Int(rand.Reader, big.NewInt(math.MaxInt64))
+		if err != nil {
+			return nil, HTTPError(ErrorFailedToGenerateManifestSeed)
+		}
+		manifestSeed := bigSeed.Int64()
+
+		ir := imageRequest{
+			imageType:    imageType,
+			repositories: repos,
+			manifestSeed: manifestSeed,
+		}
+
+		ibp := blueprint.Convert(bp)
+		manifestSource, _, err := ir.imageType.Manifest(&ibp, ir.imageOptions, ir.repositories, &ir.manifestSeed)
+		if err != nil {
+			return nil, HTTPErrorWithInternal(ErrorFailedToDepsolve, err)
+		}
+
+		packageSet = manifestSource.GetPackageSetChains()
+	} else {
+		// Send the depsolve request to the worker
+		packageSet["os"] = []rpmmd.PackageSet{
+			{
+				Include:        bp.GetPackages(),
+				EnabledModules: bp.GetEnabledModules(),
+				Repositories:   repos,
+			},
+		}
 	}
 
 	depsolveJobID, err := workers.EnqueueDepsolve(&worker.DepsolveJob{
@@ -109,5 +143,5 @@ func (request *DepsolveRequest) Depsolve(df *distrofactory.Factory, rr *reporegi
 		}
 	}
 
-	return result.PackageSpecs["depsolve"], nil
+	return result.PackageSpecs["os"], nil
 }