Also use the terminology Inplace in DownloadConfig for clarity/consistency

* swapped boolean checks
* swapped in tests too

common/download.go

@@ -38,10 +38,10 @@ type DownloadConfig struct {
 	// DownloaderMap maps a schema to a Download.
 	DownloaderMap map[string]Downloader
 
-	// If true, this will copy even a local file to the target
-	// location. If false, then it will "download" the file by just
-	// returning the local path to the file.
-	CopyFile bool
+	// Inplace indicates wether to copy file
+	// versus using it inplace.
+	// Inplace can only be true when referencing local files.
+	Inplace bool
 
 	// The hashing implementation to use to checksum the downloaded file.
 	Hash hash.Hash
@@ -154,10 +154,13 @@ func (d *DownloadClient) Get() (string, error) {
 		return "", fmt.Errorf("Unable to treat uri scheme %s as a Downloader. : %T", u.Scheme, d.downloader)
 	}
 
-	local, _ := d.downloader.(LocalDownloader)
+	local, ok := d.downloader.(LocalDownloader)
+	if !ok && d.config.Inplace {
+		d.config.Inplace = false
+	}
 
 	// If we're copying the file, then just use the actual downloader
-	if d.config.CopyFile {
+	if d.config.Inplace == false {
 		var f *os.File
 		finalPath = d.config.TargetPath
 
@@ -189,7 +192,7 @@ func (d *DownloadClient) Get() (string, error) {
 		verify, err = d.VerifyChecksum(finalPath)
 		if err == nil && !verify {
 			// Only delete the file if we made a copy or downloaded it
-			if d.config.CopyFile {
+			if d.config.Inplace == false {
 				os.Remove(finalPath)
 			}
 

common/download_test.go

@@ -58,7 +58,6 @@ func TestDownloadClient_basic(t *testing.T) {
 	client := NewDownloadClient(&DownloadConfig{
 		Url:        ts.URL + "/basic.txt",
 		TargetPath: tf.Name(),
-		CopyFile:   true,
 	})
 
 	path, err := client.Get()
@@ -94,7 +93,6 @@ func TestDownloadClient_checksumBad(t *testing.T) {
 		TargetPath: tf.Name(),
 		Hash:       HashForType("md5"),
 		Checksum:   checksum,
-		CopyFile:   true,
 	})
 
 	if _, err := client.Get(); err == nil {
@@ -120,7 +118,6 @@ func TestDownloadClient_checksumGood(t *testing.T) {
 		TargetPath: tf.Name(),
 		Hash:       HashForType("md5"),
 		Checksum:   checksum,
-		CopyFile:   true,
 	})
 
 	path, err := client.Get()
@@ -152,7 +149,6 @@ func TestDownloadClient_checksumNoDownload(t *testing.T) {
 		TargetPath: "./test-fixtures/root/another.txt",
 		Hash:       HashForType("md5"),
 		Checksum:   checksum,
-		CopyFile:   true,
 	})
 	path, err := client.Get()
 	if err != nil {
@@ -210,7 +206,6 @@ func TestDownloadClient_resume(t *testing.T) {
 	client := NewDownloadClient(&DownloadConfig{
 		Url:        ts.URL,
 		TargetPath: tf.Name(),
-		CopyFile:   true,
 	})
 
 	path, err := client.Get()
@@ -270,7 +265,6 @@ func TestDownloadClient_usesDefaultUserAgent(t *testing.T) {
 	config := &DownloadConfig{
 		Url:        server.URL,
 		TargetPath: tf.Name(),
-		CopyFile:   true,
 	}
 
 	client := NewDownloadClient(config)
@@ -303,7 +297,6 @@ func TestDownloadClient_setsUserAgent(t *testing.T) {
 		Url:        server.URL,
 		TargetPath: tf.Name(),
 		UserAgent:  "fancy user agent",
-		CopyFile:   true,
 	}
 
 	client := NewDownloadClient(config)
@@ -402,7 +395,7 @@ func TestDownloadFileUrl(t *testing.T) {
 		// This should be wrong. We want to make sure we don't delete
 		Checksum: []byte("nope"),
 		Hash:     HashForType("sha256"),
-		CopyFile: false,
+		Inplace:  true,
 	}
 
 	client := NewDownloadClient(config)
@@ -432,7 +425,7 @@ func SimulateFileUriDownload(t *testing.T, uri string) (string, error) {
 		// This should be wrong. We want to make sure we don't delete
 		Checksum: []byte("nope"),
 		Hash:     HashForType("sha256"),
-		CopyFile: false,
+		Inplace:  true,
 	}
 
 	// go go go

common/step_download.go

@@ -48,7 +48,7 @@ type StepDownload struct {
 
 	// Inplace indicates wether to copy file
 	// versus using it inplace.
-	// Inplace is only used when referencing local ISO files.
+	// Inplace can only be true when referencing local files.
 	Inplace bool
 }
 
@@ -94,7 +94,7 @@ func (s *StepDownload) Run(_ context.Context, state multistep.StateBag) multiste
 		config := &DownloadConfig{
 			Url:        url,
 			TargetPath: targetPath,
-			CopyFile:   !s.Inplace,
+			Inplace:    s.Inplace,
 			Hash:       HashForType(s.ChecksumType),
 			Checksum:   checksum,
 			UserAgent:  useragent.String(),