/
parser.go
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/
parser.go
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/*
Copyright 2018 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package parse
import (
"bufio"
"go/build"
"log"
"os"
"path/filepath"
"strings"
"github.com/pkg/errors"
rbacv1 "k8s.io/api/rbac/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/gengo/args"
"k8s.io/gengo/generator"
"k8s.io/gengo/types"
"sigs.k8s.io/controller-tools/pkg/internal/codegen"
)
// APIs is the information of a collection of API
type APIs struct {
context *generator.Context
arguments *args.GeneratorArgs
Domain string
VersionedPkgs sets.String
UnversionedPkgs sets.String
APIsPkg string
APIsPkgRaw *types.Package
GroupNames sets.String
APIs *codegen.APIs
Controllers []codegen.Controller
ByGroupKindVersion map[string]map[string]map[string]*codegen.APIResource
ByGroupVersionKind map[string]map[string]map[string]*codegen.APIResource
SubByGroupVersionKind map[string]map[string]map[string]*types.Type
Groups map[string]types.Package
Rules []rbacv1.PolicyRule
Informers map[v1.GroupVersionKind]bool
}
// NewAPIs returns a new APIs instance with given context.
func NewAPIs(context *generator.Context, arguments *args.GeneratorArgs, domain, apisPkg string) *APIs {
b := &APIs{
context: context,
arguments: arguments,
Domain: domain,
APIsPkg: apisPkg,
}
b.parsePackages()
b.parseGroupNames()
b.parseIndex()
b.parseAPIs()
b.parseCRDs()
if len(b.Domain) == 0 {
b.parseDomain()
}
return b
}
// parseGroupNames initializes b.GroupNames with the set of all groups
func (b *APIs) parseGroupNames() {
b.GroupNames = sets.String{}
for p := range b.UnversionedPkgs {
pkg := b.context.Universe[p]
if pkg == nil {
// If the input had no Go files, for example.
continue
}
b.GroupNames.Insert(filepath.Base(p))
}
}
// parsePackages parses out the sets of Versioned, Unversioned packages and identifies the root Apis package.
func (b *APIs) parsePackages() {
b.VersionedPkgs = sets.NewString()
b.UnversionedPkgs = sets.NewString()
for _, o := range b.context.Order {
if IsAPIResource(o) {
versioned := o.Name.Package
b.VersionedPkgs.Insert(versioned)
unversioned := filepath.Dir(versioned)
b.UnversionedPkgs.Insert(unversioned)
}
}
}
// parseDomain parses the domain from the apis/doc.go file comment "// +domain=YOUR_DOMAIN".
func (b *APIs) parseDomain() {
pkg := b.context.Universe[b.APIsPkg]
if pkg == nil {
// If the input had no Go files, for example.
panic(errors.Errorf("Missing apis package."))
}
comments := Comments(pkg.Comments)
b.Domain = comments.getTag("domain", "=")
if len(b.Domain) == 0 {
b.Domain = parseDomainFromFiles(b.context.Inputs)
if len(b.Domain) == 0 {
panic("Could not find string matching // +domain=.+ in apis/doc.go")
}
}
}
func parseDomainFromFiles(paths []string) string {
var domain string
for _, path := range paths {
if strings.HasSuffix(path, "pkg/apis") {
filePath := strings.Join([]string{build.Default.GOPATH, "src", path, "doc.go"}, "/")
lines := []string{}
file, err := os.Open(filePath)
if err != nil {
log.Fatal(err)
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
if strings.HasPrefix(scanner.Text(), "//") {
lines = append(lines, strings.Replace(scanner.Text(), "// ", "", 1))
}
}
if err := scanner.Err(); err != nil {
log.Fatal(err)
}
comments := Comments(lines)
domain = comments.getTag("domain", "=")
break
}
}
return domain
}