agola/internal/gitsources/github/parse.go

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// Copyright 2019 Sorint.lab
//
// 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 (
"fmt"
"net/http"
"path"
"strconv"
"strings"
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"agola.io/agola/internal/services/types"
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"github.com/google/go-github/v25/github"
errors "golang.org/x/xerrors"
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)
const (
prStateOpen = "open"
prActionOpen = "opened"
prActionSync = "synchronize"
)
func (c *Client) ParseWebhook(r *http.Request, secret string) (*types.WebhookData, error) {
payload, err := github.ValidatePayload(r, []byte(secret))
if err != nil {
return nil, errors.Errorf("wrong webhook signature: %w", err)
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}
webHookType := github.WebHookType(r)
event, err := github.ParseWebHook(webHookType, payload)
if err != nil {
return nil, errors.Errorf("failed to parse webhook: %w", err)
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}
switch event := event.(type) {
case *github.PushEvent:
return webhookDataFromPush(event)
case *github.PullRequestEvent:
return webhookDataFromPullRequest(event)
default:
return nil, errors.Errorf("unknown webhook event type: %q", webHookType)
}
}
func webhookDataFromPush(hook *github.PushEvent) (*types.WebhookData, error) {
sender := hook.Sender.Name
if sender == nil {
sender = hook.Sender.Login
}
// common data
whd := &types.WebhookData{
CommitSHA: *hook.After,
SSHURL: *hook.Repo.SSHURL,
Ref: *hook.Ref,
CompareLink: *hook.Compare,
CommitLink: fmt.Sprintf("%s/commit/%s", *hook.Repo.HTMLURL, *hook.After),
Sender: *sender,
Repo: types.WebhookDataRepo{
Path: path.Join(*hook.Repo.Owner.Name, *hook.Repo.Name),
WebURL: *hook.Repo.HTMLURL,
},
}
switch {
case strings.HasPrefix(*hook.Ref, "refs/heads/"):
whd.Event = types.WebhookEventPush
whd.Branch = strings.TrimPrefix(*hook.Ref, "refs/heads/")
whd.BranchLink = fmt.Sprintf("%s/tree/%s", *hook.Repo.HTMLURL, whd.Branch)
whd.Message = *hook.HeadCommit.Message
case strings.HasPrefix(*hook.Ref, "refs/tags/"):
whd.Event = types.WebhookEventTag
whd.Tag = strings.TrimPrefix(*hook.Ref, "refs/tags/")
whd.TagLink = fmt.Sprintf("%s/tree/%s", *hook.Repo.HTMLURL, whd.Tag)
whd.Message = fmt.Sprintf("Tag %s", whd.Tag)
// if it's a signed tag hook.After points to the signed tag sha and not the
// commit sha. In this case use hook.HeadCommit.ID
if hook.HeadCommit.ID != nil {
whd.CommitSHA = *hook.HeadCommit.ID
}
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default:
// ignore received webhook since it doesn't have a ref we're interested in
return nil, fmt.Errorf("unsupported webhook ref %q", *hook.Ref)
}
return whd, nil
}
func webhookDataFromPullRequest(hook *github.PullRequestEvent) (*types.WebhookData, error) {
// skip non open pull requests
if *hook.PullRequest.State != prStateOpen {
return nil, nil
}
// only accept actions that have new commits
if *hook.Action != prActionOpen && *hook.Action != prActionSync {
return nil, nil
}
sender := hook.Sender.Name
if sender == nil {
sender = hook.Sender.Login
}
whd := &types.WebhookData{
Event: types.WebhookEventPullRequest,
CommitSHA: *hook.PullRequest.Head.SHA,
SSHURL: *hook.Repo.SSHURL,
Ref: fmt.Sprintf("refs/pull/%d/head", *hook.Number),
CommitLink: fmt.Sprintf("%s/commit/%s", *hook.Repo.HTMLURL, *hook.PullRequest.Head.SHA),
Message: *hook.PullRequest.Title,
Sender: *sender,
PullRequestID: strconv.Itoa(*hook.PullRequest.Number),
PullRequestLink: *hook.PullRequest.HTMLURL,
Repo: types.WebhookDataRepo{
Path: path.Join(*hook.Repo.Owner.Login, *hook.Repo.Name),
WebURL: *hook.Repo.HTMLURL,
},
}
return whd, nil
}