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templatelookup.go
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templatelookup.go
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package app
import (
"encoding/json"
"fmt"
"strings"
"github.com/golang/glog"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/api/meta"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/util/sets"
kapi "k8s.io/kubernetes/pkg/api"
"k8s.io/kubernetes/pkg/kubectl/resource"
"github.com/openshift/origin/pkg/template"
templateapi "github.com/openshift/origin/pkg/template/apis/template"
templateclient "github.com/openshift/origin/pkg/template/generated/internalclientset/typed/template/internalversion"
)
// TemplateSearcher resolves stored template arguments into template objects
type TemplateSearcher struct {
Client templateclient.TemplatesGetter
Namespaces []string
StopOnExactMatch bool
}
// Search searches for a template and returns matches with the object representation
func (r TemplateSearcher) Search(precise bool, terms ...string) (ComponentMatches, []error) {
matches := ComponentMatches{}
var errs []error
for _, term := range terms {
ref, err := template.ParseTemplateReference(term)
if err != nil {
glog.V(2).Infof("template references must be of the form [<namespace>/]<name>, term %q did not qualify", term)
continue
}
if term == "__template_fail" {
errs = append(errs, fmt.Errorf("unable to find the specified template: %s", term))
continue
}
namespaces := r.Namespaces
if ref.HasNamespace() {
namespaces = []string{ref.Namespace}
}
checkedNamespaces := sets.NewString()
for _, namespace := range namespaces {
if checkedNamespaces.Has(namespace) {
continue
}
checkedNamespaces.Insert(namespace)
templates, err := r.Client.Templates(namespace).List(metav1.ListOptions{})
if err != nil {
if errors.IsNotFound(err) || errors.IsForbidden(err) {
continue
}
errs = append(errs, err)
continue
}
exact := false
for i := range templates.Items {
template := &templates.Items[i]
glog.V(4).Infof("checking namespace %s for template %s", namespace, ref.Name)
if score, scored := templateScorer(*template, ref.Name); scored {
if score == 0.0 {
exact = true
}
glog.V(4).Infof("Adding template %q in project %q with score %f", template.Name, template.Namespace, score)
fullName := fmt.Sprintf("%s/%s", template.Namespace, template.Name)
matches = append(matches, &ComponentMatch{
Value: term,
Argument: fmt.Sprintf("--template=%q", fullName),
Name: fullName,
Description: fmt.Sprintf("Template %q in project %q", template.Name, template.Namespace),
Score: score,
Template: template,
})
}
}
// If we found one or more exact matches in this namespace, do not continue looking at
// other namespaces
if exact && precise {
break
}
}
}
return matches, errs
}
// IsPossibleTemplateFile returns true if the argument can be a template file
func IsPossibleTemplateFile(value string) (bool, error) {
return isFile(value)
}
// TemplateFileSearcher resolves template files into template objects
type TemplateFileSearcher struct {
Mapper meta.RESTMapper
Typer runtime.ObjectTyper
ClientMapper resource.ClientMapper
CategoryExpander resource.CategoryExpander
Namespace string
}
// Search attempts to read template files and transform it into template objects
func (r *TemplateFileSearcher) Search(precise bool, terms ...string) (ComponentMatches, []error) {
matches := ComponentMatches{}
var errs []error
for _, term := range terms {
if term == "__templatefile_fail" {
errs = append(errs, fmt.Errorf("unable to find the specified template file: %s", term))
continue
}
var isSingleItemImplied bool
obj, err := resource.NewBuilder(r.Mapper, r.CategoryExpander, r.Typer, r.ClientMapper, kapi.Codecs.UniversalDecoder()).
NamespaceParam(r.Namespace).RequireNamespace().
FilenameParam(false, &resource.FilenameOptions{Recursive: false, Filenames: terms}).
Do().
IntoSingleItemImplied(&isSingleItemImplied).
Object()
if err != nil {
switch {
case strings.Contains(err.Error(), "does not exist") && strings.Contains(err.Error(), "the path"):
continue
case strings.Contains(err.Error(), "not a directory") && strings.Contains(err.Error(), "the path"):
continue
default:
if syntaxErr, ok := err.(*json.SyntaxError); ok {
err = fmt.Errorf("at offset %d: %v", syntaxErr.Offset, err)
}
errs = append(errs, fmt.Errorf("unable to load template file %q: %v", term, err))
continue
}
}
if list, isList := obj.(*kapi.List); isList && !isSingleItemImplied {
if len(list.Items) == 1 {
obj = list.Items[0]
isSingleItemImplied = true
}
}
if !isSingleItemImplied {
errs = append(errs, fmt.Errorf("there is more than one object in %q", term))
continue
}
template, ok := obj.(*templateapi.Template)
if !ok {
errs = append(errs, fmt.Errorf("object in %q is not a template", term))
continue
}
matches = append(matches, &ComponentMatch{
Value: term,
Argument: fmt.Sprintf("--file=%q", template.Name),
Name: template.Name,
Description: fmt.Sprintf("Template file %s", term),
Score: 0,
Template: template,
})
}
return matches, errs
}