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commands: simplify passing stdin to the build when the monitor is configured

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The monitor needs stdin to run and isn't compatible with loading a
context or dockerfile from stdin. We already disallow this combination
and, with the removal of the remote controller, there's no way to use
stdin during the build when invoke is configured.

This just removes the extra code to allow forwarding stdin to the build
when the monitor is configured to simplify that section of code.

Signed-off-by: Jonathan A. Sternberg <jonathan.sternberg@docker.com>
This commit is contained in:
Jonathan A. Sternberg
2025-06-03 15:41:23 -05:00
parent 6a0f5610e3
commit 65e46cc6af
2 changed files with 16 additions and 39 deletions
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commands/build.go
+16 -35
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@@ -425,7 +425,7 @@ func runBasicBuild(ctx context.Context, dockerCli command.Cli, opts *cbuild.Opti
return resp, dfmap, err
}
func runControllerBuild(ctx context.Context, dockerCli command.Cli, opts *cbuild.Options, options buildOptions, printer *progress.Printer) (*client.SolveResponse, *build.Inputs, error) {
func runControllerBuild(ctx context.Context, dockerCli command.Cli, opts *cbuild.Options, options buildOptions, printer *progress.Printer) (_ *client.SolveResponse, _ *build.Inputs, retErr error) {
if options.invokeConfig != nil && (options.dockerfileName == "-" || options.contextPath == "-") {
// stdin must be usable for monitor
return nil, nil, errors.Errorf("Dockerfile or context from stdin is not supported with invoke")
@@ -434,29 +434,12 @@ func runControllerBuild(ctx context.Context, dockerCli command.Cli, opts *cbuild
c := local.NewController(ctx, dockerCli)
defer c.Close()
var (
ref string
retErr error
f *ioset.SingleForwarder
pr io.ReadCloser
pw io.WriteCloser
)
var in io.ReadCloser
if options.invokeConfig == nil {
pr = dockerCli.In()
} else {
f = ioset.NewSingleForwarder()
f.SetReader(dockerCli.In())
pr, pw = io.Pipe()
f.SetWriter(pw, func() io.WriteCloser {
pw.Close() // propagate EOF
logrus.Debug("propagating stdin close")
return nil
})
in = dockerCli.In()
}
resp, inputs, err := c.Build(ctx, opts, pr, printer)
resp, inputs, err := c.Build(ctx, opts, in, printer)
if err != nil {
var be *controllererrors.BuildError
if errors.As(err, &be) {
@@ -467,28 +450,26 @@ func runControllerBuild(ctx context.Context, dockerCli command.Cli, opts *cbuild
}
}
if options.invokeConfig != nil {
if err := pw.Close(); err != nil {
logrus.Debug("failed to close stdin pipe writer")
}
if err := pr.Close(); err != nil {
logrus.Debug("failed to close stdin pipe reader")
}
}
if options.invokeConfig != nil && options.invokeConfig.needsDebug(retErr) {
// Print errors before launching monitor
if err := printError(retErr, printer); err != nil {
logrus.Warnf("failed to print error information: %v", err)
}
pr2, pw2 := io.Pipe()
f.SetWriter(pw2, func() io.WriteCloser {
pw2.Close() // propagate EOF
pr, pw := io.Pipe()
f := ioset.NewSingleForwarder()
f.SetReader(dockerCli.In())
f.SetWriter(pw, func() io.WriteCloser {
pw.Close() // propagate EOF
return nil
})
monitorBuildResult, err := options.invokeConfig.runDebug(ctx, ref, opts, c, pr2, os.Stdout, os.Stderr, printer)
if err := pw2.Close(); err != nil {
// TODO: ref was never set to a value in the original code. Removed the variable to
// reduce confusion but it also probably means this call is wrong in some way.
// This area should be removed during the refactor anyway so it doesn't matter that much.
monitorBuildResult, err := options.invokeConfig.runDebug(ctx, "", opts, c, pr, os.Stdout, os.Stderr, printer)
if err := pw.Close(); err != nil {
logrus.Debug("failed to close monitor stdin pipe reader")
}
if err != nil {