144 lines
4.1 KiB
Go
144 lines
4.1 KiB
Go
// Copyright 2019 Sorint.lab
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//
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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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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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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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package github
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import (
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"fmt"
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"net/http"
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"path"
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"strconv"
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"strings"
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"agola.io/agola/internal/services/types"
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"github.com/google/go-github/v29/github"
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errors "golang.org/x/xerrors"
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)
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const (
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prStateOpen = "open"
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prActionOpen = "opened"
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prActionSync = "synchronize"
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)
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func (c *Client) ParseWebhook(r *http.Request, secret string) (*types.WebhookData, error) {
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payload, err := github.ValidatePayload(r, []byte(secret))
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if err != nil {
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return nil, errors.Errorf("wrong webhook signature: %w", err)
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}
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webHookType := github.WebHookType(r)
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event, err := github.ParseWebHook(webHookType, payload)
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if err != nil {
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return nil, errors.Errorf("failed to parse webhook: %w", err)
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}
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switch event := event.(type) {
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case *github.PushEvent:
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return webhookDataFromPush(event)
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case *github.PullRequestEvent:
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return webhookDataFromPullRequest(event)
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default:
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return nil, errors.Errorf("unknown webhook event type: %q", webHookType)
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}
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}
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func webhookDataFromPush(hook *github.PushEvent) (*types.WebhookData, error) {
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sender := hook.Sender.Name
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if sender == nil {
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sender = hook.Sender.Login
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}
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// common data
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whd := &types.WebhookData{
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CommitSHA: *hook.After,
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SSHURL: *hook.Repo.SSHURL,
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Ref: *hook.Ref,
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CompareLink: *hook.Compare,
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CommitLink: fmt.Sprintf("%s/commit/%s", *hook.Repo.HTMLURL, *hook.After),
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Sender: *sender,
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Repo: types.WebhookDataRepo{
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Path: path.Join(*hook.Repo.Owner.Name, *hook.Repo.Name),
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WebURL: *hook.Repo.HTMLURL,
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},
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}
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switch {
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case strings.HasPrefix(*hook.Ref, "refs/heads/"):
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whd.Event = types.WebhookEventPush
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whd.Branch = strings.TrimPrefix(*hook.Ref, "refs/heads/")
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whd.BranchLink = fmt.Sprintf("%s/tree/%s", *hook.Repo.HTMLURL, whd.Branch)
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whd.Message = *hook.HeadCommit.Message
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case strings.HasPrefix(*hook.Ref, "refs/tags/"):
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whd.Event = types.WebhookEventTag
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whd.Tag = strings.TrimPrefix(*hook.Ref, "refs/tags/")
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whd.TagLink = fmt.Sprintf("%s/tree/%s", *hook.Repo.HTMLURL, whd.Tag)
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whd.Message = fmt.Sprintf("Tag %s", whd.Tag)
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// if it's a signed tag hook.After points to the signed tag sha and not the
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// commit sha. In this case use hook.HeadCommit.ID
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if hook.HeadCommit.ID != nil {
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whd.CommitSHA = *hook.HeadCommit.ID
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}
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default:
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// ignore received webhook since it doesn't have a ref we're interested in
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return nil, fmt.Errorf("unsupported webhook ref %q", *hook.Ref)
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}
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return whd, nil
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}
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func webhookDataFromPullRequest(hook *github.PullRequestEvent) (*types.WebhookData, error) {
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// skip non open pull requests
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if *hook.PullRequest.State != prStateOpen {
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return nil, nil
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}
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// only accept actions that have new commits
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if *hook.Action != prActionOpen && *hook.Action != prActionSync {
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return nil, nil
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}
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sender := hook.Sender.Name
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if sender == nil {
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sender = hook.Sender.Login
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}
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prFromSameRepo := false
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if hook.PullRequest.Base.Repo.URL == hook.PullRequest.Head.Repo.URL {
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prFromSameRepo = true
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}
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whd := &types.WebhookData{
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Event: types.WebhookEventPullRequest,
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CommitSHA: *hook.PullRequest.Head.SHA,
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SSHURL: *hook.Repo.SSHURL,
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Ref: fmt.Sprintf("refs/pull/%d/head", *hook.Number),
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CommitLink: fmt.Sprintf("%s/commit/%s", *hook.Repo.HTMLURL, *hook.PullRequest.Head.SHA),
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Message: *hook.PullRequest.Title,
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Sender: *sender,
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PullRequestID: strconv.Itoa(*hook.PullRequest.Number),
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PullRequestLink: *hook.PullRequest.HTMLURL,
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PRFromSameRepo: prFromSameRepo,
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Repo: types.WebhookDataRepo{
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Path: path.Join(*hook.Repo.Owner.Login, *hook.Repo.Name),
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WebURL: *hook.Repo.HTMLURL,
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},
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}
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return whd, nil
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}
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