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github.go
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github.go
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// Copyright 2020 micnncim
//
// 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 github
import (
"context"
"fmt"
"io/ioutil"
"github.com/google/go-github/github"
"golang.org/x/oauth2"
"golang.org/x/sync/errgroup"
"gopkg.in/yaml.v2"
)
type Client struct {
githubClient *github.Client
token string
}
type Label struct {
Name string `yaml:"name"`
Description string `yaml:"description"`
Color string `yaml:"color"`
}
func FromManifestToLabels(path string) ([]Label, error) {
buf, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
var labels []Label
err = yaml.Unmarshal(buf, &labels)
return labels, err
}
func NewClient(token string) *Client {
ctx := context.Background()
ts := oauth2.StaticTokenSource(
&oauth2.Token{AccessToken: token},
)
tc := oauth2.NewClient(ctx, ts)
return &Client{
githubClient: github.NewClient(tc),
}
}
func (c *Client) SyncLabels(ctx context.Context, owner, repo string, labels []Label, prune bool) error {
labelMap := make(map[string]Label)
for _, l := range labels {
labelMap[l.Name] = l
}
currentLabels, err := c.getLabels(ctx, owner, repo)
if err != nil {
return err
}
currentLabelMap := make(map[string]Label)
for _, l := range currentLabels {
currentLabelMap[l.Name] = l
}
eg := errgroup.Group{}
// Delete labels.
if prune {
for _, currentLabel := range currentLabels {
currentLabel := currentLabel
eg.Go(func() error {
_, ok := labelMap[currentLabel.Name]
if ok {
return nil
}
return c.deleteLabel(ctx, owner, repo, currentLabel.Name)
})
}
if err := eg.Wait(); err != nil {
return err
}
}
// Create and/or update labels.
for _, l := range labels {
l := l
eg.Go(func() error {
currentLabel, ok := currentLabelMap[l.Name]
if !ok {
return c.createLabel(ctx, owner, repo, l)
}
if currentLabel.Description != l.Description || currentLabel.Color != l.Color {
return c.updateLabel(ctx, owner, repo, l)
}
fmt.Printf("label: %+v not changed on %s/%s\n", l, owner, repo)
return nil
})
}
return eg.Wait()
}
func (c *Client) createLabel(ctx context.Context, owner, repo string, label Label) error {
l := &github.Label{
Name: &label.Name,
Description: &label.Description,
Color: &label.Color,
}
_, _, err := c.githubClient.Issues.CreateLabel(ctx, owner, repo, l)
fmt.Printf("label: %+v created on: %s/%s\n", label, owner, repo)
return err
}
func (c *Client) getLabels(ctx context.Context, owner, repo string) ([]Label, error) {
opt := &github.ListOptions{
PerPage: 50,
}
var labels []Label
for {
ls, resp, err := c.githubClient.Issues.ListLabels(ctx, owner, repo, opt)
if err != nil {
return nil, err
}
for _, l := range ls {
labels = append(labels, Label{
Name: l.GetName(),
Description: l.GetDescription(),
Color: l.GetColor(),
})
}
if resp.NextPage == 0 {
break
}
opt.Page = resp.NextPage
}
return labels, nil
}
func (c *Client) updateLabel(ctx context.Context, owner, repo string, label Label) error {
l := &github.Label{
Name: &label.Name,
Description: &label.Description,
Color: &label.Color,
}
_, _, err := c.githubClient.Issues.EditLabel(ctx, owner, repo, label.Name, l)
fmt.Printf("label %+v updated on: %s/%s\n", label, owner, repo)
return err
}
func (c *Client) deleteLabel(ctx context.Context, owner, repo, name string) error {
_, err := c.githubClient.Issues.DeleteLabel(ctx, owner, repo, name)
fmt.Printf("label: %s deleted from: %s/%s\n", name, owner, repo)
return err
}