pkg/machine/e2e: Remove unnecessary copy of machine image.

Stop copying the pre-pulled uncompressed machine disk into the individual test dir. The machine pull code already makes a copy of the disk into the test's HOMEDIR/.local/share/containers/podman/machine, and works off that copy.

Before the change: TESTDIR/<image> is copied to TESTDIR/podman_test/<image> by the test, and then podman machine copies the image to TESTDIR/podman_test/.local/share/containers/podman/machine/provider/<image>

After the change: TESTDIR/<image> is copied to TESTDIR/podman_test/.local/share/containers/podman/machine/provider/<image> by podman machine

The image that is actually run is at TESTDIR/podman_test/.local/share/containers/podman/machine/provider/<image> in both instances.

Signed-off-by: Ashley Cui <[email protected]>

pkg/machine/e2e/machine_test.go

@@ -3,15 +3,13 @@ package e2e_test
 import (
 	"errors"
 	"fmt"
-	"io"
 	"os"
 	"path/filepath"
 	"runtime"
 	"strings"
 	"testing"
 
 	"github.com/containers/common/pkg/config"
-	"github.com/containers/podman/v5/pkg/machine/compression"
 	"github.com/containers/podman/v5/pkg/machine/define"
 	"github.com/containers/podman/v5/pkg/machine/provider"
 	"github.com/containers/podman/v5/pkg/machine/vmconfigs"
@@ -126,26 +124,7 @@ func setup() (string, *machineTestBuilder) {
 			Fail(fmt.Sprintf("failed to close src reader %q: %q", src.Name(), err))
 		}
 	}()
-	mb.imagePath = filepath.Join(homeDir, suiteImageName)
-	dest, err := os.Create(mb.imagePath)
-	if err != nil {
-		Fail(fmt.Sprintf("failed to create file %s: %q", mb.imagePath, err))
-	}
-	defer func() {
-		if err := dest.Close(); err != nil {
-			Fail(fmt.Sprintf("failed to close destination file %q: %q\n", dest.Name(), err))
-		}
-	}()
-	fmt.Printf("--> copying %q to %q\n", src.Name(), dest.Name())
-	if runtime.GOOS != "darwin" {
-		if _, err := io.Copy(dest, src); err != nil {
-			Fail(fmt.Sprintf("failed to copy %ss to %s: %q", fqImageName, mb.imagePath, err))
-		}
-	} else {
-		if err := copySparse(dest, src); err != nil {
-			Fail(fmt.Sprintf("failed to copy %q to %q: %q", src.Name(), dest.Name(), err))
-		}
-	}
+	mb.imagePath = fqImageName
 	return homeDir, mb
 }
 
@@ -171,18 +150,6 @@ func teardown(origHomeDir string, testDir string, mb *machineTestBuilder) {
 	}
 }
 
-// copySparse is a helper method for tests only; caller is responsible for closures
-func copySparse(dst io.WriteSeeker, src io.Reader) (retErr error) {
-	spWriter := compression.NewSparseWriter(dst)
-	defer func() {
-		if err := spWriter.Close(); err != nil && retErr == nil {
-			retErr = err
-		}
-	}()
-	_, err := io.Copy(spWriter, src)
-	return err
-}
-
 func setTmpDir(value string) (string, error) {
 	switch {
 	case runtime.GOOS != "darwin":