mirror of https://github.com/knative/docs.git
111 lines
3.1 KiB
Go
111 lines
3.1 KiB
Go
/*
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Copyright 2018 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package main
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import (
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"context"
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"flag"
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"fmt"
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"log"
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"os"
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"strings"
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ghclient "github.com/google/go-github/github"
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"golang.org/x/oauth2"
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webhooks "gopkg.in/go-playground/webhooks.v3"
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"gopkg.in/go-playground/webhooks.v3/github"
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)
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const (
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// Secret given to github. Used for verifying the incoming objects.
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personalAccessTokenKey = "GITHUB_PERSONAL_TOKEN"
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// Personal Access Token created in github that allows us to make
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// calls into github.
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webhookSecretKey = "WEBHOOK_SECRET"
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// this is what we tack onto each PR title if not there already
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titleSuffix = "looks pretty legit"
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)
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// GithubHandler holds necessary objects for communicating with the Github.
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type GithubHandler struct {
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client *ghclient.Client
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ctx context.Context
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}
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// HandlePullRequest is invoked whenever a PullRequest is modified (created, updated, etc.)
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func (handler *GithubHandler) HandlePullRequest(payload interface{}, header webhooks.Header) {
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log.Print("Handling Pull Request")
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pl := payload.(github.PullRequestPayload)
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// Do whatever you want from here...
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title := pl.PullRequest.Title
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log.Printf("GOT PR with Title: %q", title)
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// Check the title and if it contains 'looks pretty legit' leave it alone
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if strings.Contains(title, titleSuffix) {
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// already modified, leave it alone.
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return
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}
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newTitle := fmt.Sprintf("%s (%s)", title, titleSuffix)
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updatedPR := ghclient.PullRequest{
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Title: &newTitle,
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}
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newPR, response, err := handler.client.PullRequests.Edit(handler.ctx, pl.Repository.Owner.Login, pl.Repository.Name, int(pl.Number), &updatedPR)
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if err != nil {
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log.Printf("Failed to update PR: %s\n%s", err, response)
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return
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}
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if newPR.Title != nil {
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log.Printf("New PR Title: %q", *newPR.Title)
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} else {
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log.Print("New PR title is nil")
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}
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}
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func main() {
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flag.Parse()
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log.Print("gitwebhook sample started.")
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personalAccessToken := os.Getenv(personalAccessTokenKey)
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secretToken := os.Getenv(webhookSecretKey)
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// Set up the auth for being able to talk to Github. It's
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// odd that you have to also pass context around for the
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// calls even after giving it to client. But, whatever.
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ctx := context.Background()
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ts := oauth2.StaticTokenSource(
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&oauth2.Token{AccessToken: personalAccessToken},
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)
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tc := oauth2.NewClient(ctx, ts)
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client := ghclient.NewClient(tc)
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h := &GithubHandler{
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client: client,
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ctx: ctx,
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}
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hook := github.New(&github.Config{Secret: secretToken})
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hook.RegisterEvents(h.HandlePullRequest, github.PullRequestEvent)
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err := webhooks.Run(hook, ":8080", "/")
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if err != nil {
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fmt.Println("Failed to run the webhook")
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}
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}
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