bake(cli): allow passing in-stream using command.Cli

ReadLocalFiles should allow passing the stdin file as an argument, which
allows us to read from dockerCli.Stdin() to be consistent with other
commands in the same package.

Signed-off-by: Justin Chadwell <me@jedevc.com>

bake/bake.go

@@ -55,7 +55,7 @@ func defaultFilenames() []string {
 	return names
 }
 
-func ReadLocalFiles(names []string) ([]File, error) {
+func ReadLocalFiles(names []string, stdin io.Reader) ([]File, error) {
 	isDefault := false
 	if len(names) == 0 {
 		isDefault = true
@@ -67,7 +67,7 @@ func ReadLocalFiles(names []string) ([]File, error) {
 		var dt []byte
 		var err error
 		if n == "-" {
-			dt, err = io.ReadAll(os.Stdin)
+			dt, err = io.ReadAll(stdin)
 			if err != nil {
 				return nil, err
 			}

bake/bake_test.go

@@ -1398,7 +1398,7 @@ func TestReadLocalFilesDefault(t *testing.T) {
 			for _, tf := range tt.filenames {
 				require.NoError(t, os.WriteFile(tf, []byte(tf), 0644))
 			}
-			files, err := ReadLocalFiles(nil)
+			files, err := ReadLocalFiles(nil, nil)
 			require.NoError(t, err)
 			if len(files) == 0 {
 				require.Equal(t, len(tt.expected), len(files))

commands/bake.go

@@ -146,7 +146,7 @@ func runBake(dockerCli command.Cli, targets []string, in bakeOptions, cFlags com
 	if url != "" {
 		files, inp, err = bake.ReadRemoteFiles(ctx, nodes, url, in.files, printer)
 	} else {
-		files, err = bake.ReadLocalFiles(in.files)
+		files, err = bake.ReadLocalFiles(in.files, dockerCli.In())
 	}
 	if err != nil {
 		return err

util/cobrautil/completion/completion.go

@@ -19,7 +19,7 @@ func Disable(cmd *cobra.Command, args []string, toComplete string) ([]string, co
 
 func BakeTargets(files []string) ValidArgsFn {
 	return func(cmd *cobra.Command, args []string, toComplete string) ([]string, cobra.ShellCompDirective) {
-		f, err := bake.ReadLocalFiles(files)
+		f, err := bake.ReadLocalFiles(files, nil)
 		if err != nil {
 			return nil, cobra.ShellCompDirectiveError
 		}