replace table presenter with format object (#586)

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

internal/formats/formats.go

@@ -3,6 +3,8 @@ package formats
 import (
 	"bytes"
 
+	"github.com/anchore/syft/internal/formats/table"
+
 	"github.com/anchore/syft/internal/formats/syftjson"
 	"github.com/anchore/syft/syft/format"
 )
@@ -11,6 +13,7 @@ import (
 func All() []format.Format {
 	return []format.Format{
 		syftjson.Format(),
+		table.Format(),
 	}
 }
 

internal/formats/table/encoder.go

@@ -1,4 +1,4 @@
-package packages
+package table
 
 import (
 	"fmt"
@@ -8,24 +8,16 @@ import (
 
 	"github.com/olekukonko/tablewriter"
 
+	"github.com/anchore/syft/syft/distro"
 	"github.com/anchore/syft/syft/pkg"
+	"github.com/anchore/syft/syft/source"
 )
 
-type TablePresenter struct {
-	catalog *pkg.Catalog
-}
-
-func NewTablePresenter(catalog *pkg.Catalog) *TablePresenter {
-	return &TablePresenter{
-		catalog: catalog,
-	}
-}
-
-func (pres *TablePresenter) Present(output io.Writer) error {
-	rows := make([][]string, 0)
+func encoder(output io.Writer, catalog *pkg.Catalog, _ *source.Metadata, _ *distro.Distro, _ source.Scope) error {
+	var rows [][]string
 
 	columns := []string{"Name", "Version", "Type"}
-	for _, p := range pres.catalog.Sorted() {
+	for _, p := range catalog.Sorted() {
 		row := []string{
 			p.Name,
 			p.Version,
@@ -35,8 +27,8 @@ func (pres *TablePresenter) Present(output io.Writer) error {
 	}
 
 	if len(rows) == 0 {
-		fmt.Fprintln(output, "No packages discovered")
-		return nil
+		_, err := fmt.Fprintln(output, "No packages discovered")
+		return err
 	}
 
 	// sort by name, version, then type

internal/formats/table/encoder_test.go

@@ -1,23 +1,22 @@
-package packages
+package table
 
 import (
 	"flag"
 	"testing"
 
 	"github.com/anchore/syft/internal/formats/common/testutils"
-
+	"github.com/anchore/syft/syft/format"
+	"github.com/anchore/syft/syft/source"
 	"github.com/go-test/deep"
 )
 
-var updateTablePresenterGoldenFiles = flag.Bool("update-table", false, "update the *.golden files for table presenters")
+var updateTableGoldenFiles = flag.Bool("update-table", false, "update the *.golden files for table format")
 
 func TestTablePresenter(t *testing.T) {
-	testImage := "image-simple"
-	catalog, _, _ := testutils.ImageInput(t, testImage)
-	testutils.AssertPresenterAgainstGoldenImageSnapshot(t,
-		NewTablePresenter(catalog),
-		testImage,
-		*updateTablePresenterGoldenFiles,
+	catalog, metadata, distro := testutils.DirectoryInput(t)
+	testutils.AssertPresenterAgainstGoldenSnapshot(t,
+		format.NewPresenter(encoder, catalog, &metadata, distro, source.SquashedScope),
+		*updateTableGoldenFiles,
 	)
 }
 

internal/formats/table/format.go

@@ -0,0 +1,12 @@
+package table
+
+import "github.com/anchore/syft/syft/format"
+
+func Format() format.Format {
+	return format.NewFormat(
+		format.TableOption,
+		encoder,
+		nil,
+		nil,
+	)
+}

syft/presenter/packages/presenter.go

@@ -16,8 +16,6 @@ func Presenter(option format.Option, config PresenterConfig) presenter.Presenter
 	switch option {
 	case format.TextOption:
 		return packages.NewTextPresenter(config.Catalog, config.SourceMetadata)
-	case format.TableOption:
-		return packages.NewTablePresenter(config.Catalog)
 	case format.CycloneDxOption:
 		return packages.NewCycloneDxPresenter(config.Catalog, config.SourceMetadata)
 	case format.SPDXTagValueOption: