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parse.go
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/
parse.go
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package discovery
import (
"fmt"
"net/url"
"strings"
"github.com/appc/spec/schema/types"
)
type App struct {
Name types.ACIdentifier
Labels map[types.ACIdentifier]string
}
func NewApp(name string, labels map[types.ACIdentifier]string) (*App, error) {
if labels == nil {
labels = make(map[types.ACIdentifier]string, 0)
}
acn, err := types.NewACIdentifier(name)
if err != nil {
return nil, err
}
return &App{
Name: *acn,
Labels: labels,
}, nil
}
// NewAppFromString takes a command line app parameter and returns a map of labels.
//
// Example app parameters:
// example.com/reduce-worker:1.0.0
// example.com/reduce-worker,channel=alpha,label=value
func NewAppFromString(app string) (*App, error) {
var (
name string
labels map[types.ACIdentifier]string
)
app = strings.Replace(app, ":", ",version=", -1)
app = "name=" + app
v, err := url.ParseQuery(strings.Replace(app, ",", "&", -1))
if err != nil {
return nil, err
}
labels = make(map[types.ACIdentifier]string, 0)
for key, val := range v {
if len(val) > 1 {
return nil, fmt.Errorf("label %s with multiple values %q", key, val)
}
if key == "name" {
name = val[0]
continue
}
labelName, err := types.NewACIdentifier(key)
if err != nil {
return nil, err
}
labels[*labelName] = val[0]
}
a, err := NewApp(name, labels)
if err != nil {
return nil, err
}
return a, nil
}
func (a *App) Copy() *App {
ac := &App{
Name: a.Name,
Labels: make(map[types.ACIdentifier]string, 0),
}
for k, v := range a.Labels {
ac.Labels[k] = v
}
return ac
}
// String returns the URL-like image name
func (a *App) String() string {
img := a.Name.String()
for n, v := range a.Labels {
img += fmt.Sprintf(",%s=%s", n, v)
}
return img
}