dotcloud/docker

package opts // import "github.com/docker/docker/opts"

import (
    "fmt"
    "strings"

    "github.com/docker/docker/api/types/system"
)

// RuntimeOpt defines a map of Runtimes
type RuntimeOpt struct {
    name             string
    stockRuntimeName string
    values           *map[string]system.Runtime
}

// NewNamedRuntimeOpt creates a new RuntimeOpt
func NewNamedRuntimeOpt(name string, ref *map[string]system.Runtime, stockRuntime string) *RuntimeOpt {
    if ref == nil {
        ref = &map[string]system.Runtime{}
    }
    return &RuntimeOpt{name: name, values: ref, stockRuntimeName: stockRuntime}
}

// Name returns the name of the NamedListOpts in the configuration.
func (o *RuntimeOpt) Name() string {
    return o.name
}

// Set validates and updates the list of Runtimes
func (o *RuntimeOpt) Set(val string) error {
    k, v, ok := strings.Cut(val, "=")
    if !ok {
        return fmt.Errorf("invalid runtime argument: %s", val)
    }

    // TODO(thaJeztah): this should not accept spaces.
    k = strings.TrimSpace(k)
    v = strings.TrimSpace(v)
    if k == "" || v == "" {
        return fmt.Errorf("invalid runtime argument: %s", val)
    }

    // TODO(thaJeztah): this should not be case-insensitive.
    k = strings.ToLower(k)
    if k == o.stockRuntimeName {
        return fmt.Errorf("runtime name '%s' is reserved", o.stockRuntimeName)
    }

    if _, ok := (*o.values)[k]; ok {
        return fmt.Errorf("runtime '%s' was already defined", k)
    }

    (*o.values)[k] = system.Runtime{Path: v}

    return nil
}

// String returns Runtime values as a string.
func (o *RuntimeOpt) String() string {
    var out []string
    for k := range *o.values {
        out = append(out, k)
    }

    return fmt.Sprintf("%v", out)
}

// GetMap returns a map of Runtimes (name: path)
func (o *RuntimeOpt) GetMap() map[string]system.Runtime {
    if o.values != nil {
        return *o.values
    }

    return map[string]system.Runtime{}
}

// Type returns the type of the option
func (o *RuntimeOpt) Type() string {
    return "runtime"
}