Function Build

internal/devserver/builder.go:29–41

Build compiles pkg (a Go package path, e.g. "." or "./cmd/app") to out. It uses `go build` in the provided working directory. Context cancellation kills the build.

(ctx context.Context, workDir, pkg, out string)

// It uses `go build` in the provided working directory. Context cancellation
// kills the build.
func Build(ctx context.Context, workDir, pkg, out string) error {
	if pkg == "" {
		pkg = "."
	}
	var stderr bytes.Buffer
	cmd := exec.CommandContext(ctx, "go", "build", "-o", out, pkg)
	cmd.Dir = workDir
	cmd.Stderr = &stderr
	if err := cmd.Run(); err != nil {
		return &BuildError{Stderr: stderr.String(), Err: err}
	}
	return nil
}