func ExampleCommand_withError() {
err := stream.Run(stream.Command("no_such_command"))
if err == nil {
fmt.Println("execution of missing command succeeded unexpectedly")
}
// Output:
}
// GetHostConfig gets the machine config from docker-machine.
// It takes an initialized driver.HostConfig struct with the Driver
// field initialized to the driver-specific type.
// The passed-in object is filled in with the contents of the config.
func GetHostConfig(name string, config *drivers.HostConfig) error {
contents, err := stream.Contents(stream.Command(dockerMachineBinary, "inspect", name))
if err != nil {
return err
}
return json.Unmarshal([]byte(strings.Join(contents, "\n")), config)
}
func ExampleCommand() {
stream.Run(
stream.Numbers(1, 100),
stream.Command("wc", "-l"),
stream.WriteLines(os.Stdout),
)
// Output:
// 100
}
// GetDockerFlags returns the list of flags we need to pass to docker to
// talk to the given machine's docker daemon.
// We expect a single line, but then split that line into individual flags.
func GetDockerFlags(name string) ([]string, error) {
contents, err := stream.Contents(stream.Command(dockerMachineBinary, "config", name))
if err != nil {
return nil, err
}
if len(contents) != 1 {
return nil, util.Errorf("expected a single output line, got: %v", contents)
}
return strings.Split(contents[0], " "), nil
}
func ExampleXargs_splitArguments() {
// Xargs should split the long list of arguments into
// three executions to keep command length below 4096.
stream.Run(
stream.Numbers(1, 2000),
stream.Xargs("echo"),
stream.Command("wc", "-l"),
stream.WriteLines(os.Stdout),
)
// Output:
// 3
}
func ExampleCommand_outputOnly() {
stream.Run(
stream.Command("find", ".", "-type", "f", "-print"),
stream.Grep(`^\./stream.*\.go$`),
stream.Sort(),
stream.WriteLines(os.Stdout),
)
// Output:
// ./stream.go
// ./stream_test.go
}
// ListMachines returns a list of machine names.
func ListMachines() ([]string, error) {
return stream.Contents(stream.Command(dockerMachineBinary, "ls", "-q"))
}
func BenchmarkCmd(b *testing.B) {
stream.Run(
stream.Repeat("hello", b.N),
stream.Command("cat"),
)
}