pkg/legacy: Restore helpers.go

Signed-off-by: Stephen Augustus <[email protected]>

Author: justaugustus

pkg/legacy/util/helpers.go

@@ -0,0 +1,112 @@
+/*
+Copyright 2020 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 util
+
+import (
+	"bufio"
+	"fmt"
+	"io/ioutil"
+	"net/http"
+	"os"
+	"regexp"
+	"sort"
+
+	"sigs.k8s.io/yaml"
+)
+
+var (
+	groups       []string
+	prrApprovers []string
+)
+
+// Groups returns a list of Kubernetes groups (SIGs, Working Groups, User Groups).
+func Groups() []string {
+	return groups
+}
+
+// PRRApprovers returns a list of PRR approvers.
+func PRRApprovers() []string {
+	return prrApprovers
+}
+
+func init() {
+	var err error
+	groups, err = fetchGroups()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		os.Exit(1)
+	}
+	prrApprovers, err = fetchPRRApprovers()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "%v\n", err)
+		os.Exit(1)
+	}
+}
+
+func fetchGroups() ([]string, error) {
+	resp, err := http.Get("https://raw.githubusercontent.com/kubernetes/community/master/sigs.yaml")
+	if err != nil {
+		return nil, fmt.Errorf("unable to fetch list of sigs: %v", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("invalid status code when fetching list of sigs: %d", resp.StatusCode)
+	}
+	re := regexp.MustCompile(`- dir: (.*)$`)
+
+	var result []string
+	scanner := bufio.NewScanner(resp.Body)
+	for scanner.Scan() {
+		match := re.FindStringSubmatch(scanner.Text())
+		if len(match) > 0 {
+			result = append(result, match[1])
+		}
+	}
+	if err := scanner.Err(); err != nil {
+		return nil, fmt.Errorf("unable to scan list of sigs: %v", err)
+	}
+	sort.Strings(result)
+	return result, nil
+}
+
+func fetchPRRApprovers() ([]string, error) {
+	resp, err := http.Get("https://raw.githubusercontent.com/kubernetes/enhancements/master/OWNERS_ALIASES")
+	if err != nil {
+		return nil, fmt.Errorf("unable to fetch list of aliases: %v", err)
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("invalid status code when fetching list of aliases: %d", resp.StatusCode)
+	}
+
+	body, err := ioutil.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("unable to read aliases content: %v", err)
+	}
+
+	config := &struct {
+		Data map[string][]string `json:"aliases,omitempty"`
+	}{}
+	if err := yaml.Unmarshal(body, config); err != nil {
+		return nil, fmt.Errorf("unable to read parse aliases content: %v", err)
+	}
+	var result []string
+	result = append(result, config.Data["prod-readiness-approvers"]...)
+
+	sort.Strings(result)
+	return result, nil
+}