image-builder: add ib build --filename foo.img support

Author: mvo5

Diff for: cmd/image-builder/build.go

@@ -11,7 +11,7 @@ import (
 	"github.com/osbuild/images/pkg/osbuild"
 )
 
-func buildImage(out io.Writer, distroName, imgTypeStr string) error {
+func buildImage(out io.Writer, distroName, imgTypeStr, outputFilename string) error {
 	// cross arch building is not possible, we would have to download
 	// a pre-populated buildroot (tar,container) with rpm for that
 	archStr := arch.Current().String()
@@ -22,7 +22,10 @@ func buildImage(out io.Writer, distroName, imgTypeStr string) error {
 	imgType := filterResult.ImgType
 
 	var mf bytes.Buffer
-	if err := outputManifest(&mf, distroName, imgTypeStr, archStr); err != nil {
+	opts := &genManifestOptions{
+		OutputFilename: outputFilename,
+	}
+	if err := outputManifest(&mf, distroName, imgTypeStr, archStr, opts); err != nil {
 		return err
 	}
 

Diff for: cmd/image-builder/main.go

@@ -38,15 +38,19 @@ func cmdManifest(cmd *cobra.Command, args []string) error {
 		archStr = arch.Current().String()
 	}
 
-	return outputManifest(osStdout, distroName, imgType, archStr)
+	return outputManifest(osStdout, distroName, imgType, archStr, nil)
 }
 
 func cmdBuild(cmd *cobra.Command, args []string) error {
 	// support prefixes to make it easy to copy/paste from list-images
 	distroName := strings.TrimPrefix(args[0], "distro:")
 	imgType := strings.TrimPrefix(args[1], "type:")
+	outputFilename, err := cmd.Flags().GetString("filename")
+	if err != nil {
+		return err
+	}
 
-	return buildImage(osStdout, distroName, imgType)
+	return buildImage(osStdout, distroName, imgType, outputFilename)
 }
 
 func run() error {
@@ -95,8 +99,10 @@ operating sytsems like centos and RHEL with easy customizations support.`,
 		// XXX: show error with available types if only one arg given
 		Args: cobra.ExactArgs(2),
 	}
-	rootCmd.AddCommand(buildCmd)
+	// XXX: add this for "manifest" too in a nice way
+	buildCmd.Flags().String("filename", "", "Output as a specific filename")
 	// XXX: add --output=text,json and streaming
+	rootCmd.AddCommand(buildCmd)
 
 	return rootCmd.Execute()
 }

Diff for: cmd/image-builder/manifest.go

@@ -29,15 +29,20 @@ func depsolve(cacheDir string, packageSets map[string][]rpmmd.PackageSet, d dist
 	return depsolvedSets, repoSets, nil
 }
 
-func outputManifest(out io.Writer, distroName, imgTypeStr, archStr string) error {
-	// XXX: what/how much do we expose here?
-	var options distro.ImageOptions
+type genManifestOptions struct {
+	OutputFilename string
+}
+
+func outputManifest(out io.Writer, distroName, imgTypeStr, archStr string, opts *genManifestOptions) error {
+	if opts == nil {
+		opts = &genManifestOptions{}
+	}
 
 	filterResult, err := getOneImage(distroName, imgTypeStr, archStr)
 	if err != nil {
 		return err
 	}
-	distro := filterResult.Distro
+	dist := filterResult.Distro
 	imgType := filterResult.ImgType
 
 	reporeg, err := newRepoRegistry()
@@ -50,7 +55,10 @@ func outputManifest(out io.Writer, distroName, imgTypeStr, archStr string) error
 	}
 
 	var bp blueprint.Blueprint
-	preManifest, warnings, err := imgType.Manifest(&bp, options, repos, 0)
+	imgOpts := distro.ImageOptions{
+		OutputFilename: opts.OutputFilename,
+	}
+	preManifest, warnings, err := imgType.Manifest(&bp, imgOpts, repos, 0)
 	if err != nil {
 		return err
 	}
@@ -64,7 +72,7 @@ func outputManifest(out io.Writer, distroName, imgTypeStr, archStr string) error
 	if err != nil {
 		return err
 	}
-	packageSpecs, _, err := depsolve(cacheDir, preManifest.GetPackageSetChains(), distro, archStr)
+	packageSpecs, _, err := depsolve(cacheDir, preManifest.GetPackageSetChains(), dist, archStr)
 	if err != nil {
 		return err
 	}