forked from openshift/origin
/
usage.go
49 lines (41 loc) · 1.04 KB
/
usage.go
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package sti
import (
"github.com/openshift/source-to-image/pkg/api"
"github.com/openshift/source-to-image/pkg/build"
)
// UsageHandler handles a request to display usage
type usageHandler interface {
build.ScriptsHandler
build.Preparer
SetScripts([]string, []string)
}
// Usage display usage information about a particular build image
type Usage struct {
handler usageHandler
garbage build.Cleaner
request *api.Request
}
// NewUsage creates a new instance of the default Usage implementation
func NewUsage(req *api.Request) (*Usage, error) {
b, err := New(req)
if err != nil {
return nil, err
}
usage := Usage{
handler: b,
request: req,
garbage: b.garbage,
}
return &usage, nil
}
// Show starts the builder container and invokes the usage script on it
// to print usage information for the script.
func (u *Usage) Show() error {
b := u.handler
defer u.garbage.Cleanup(u.request)
b.SetScripts([]string{api.Usage}, []string{})
if err := b.Prepare(u.request); err != nil {
return err
}
return b.Execute(api.Usage, u.request)
}