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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License. See License.txt in the project root for license information.
package link
import (
"context"
"fmt"
"strconv"
"strings"
"github.com/Azure/azure-sdk-for-go/eng/tools/generator/cmd/issue/query"
"github.com/ahmetb/go-linq/v3"
"github.com/google/go-github/v32/github"
)
type pullRequestLink struct {
linkBase
}
// NewPullRequestLink parses a pull request link to its corresponding readme.md file link
func NewPullRequestLink(ctx context.Context, client *query.Client, requestLink, releaseLink string) Resolver {
return &pullRequestLink{
linkBase: linkBase{
ctx: ctx,
client: client,
releaseLink: releaseLink,
requestLink: requestLink,
},
}
}
// Resolve ...
func (l pullRequestLink) Resolve() (ResolveResult, error) {
n, err := l.getPullRequestNumber()
if err != nil {
return nil, fmt.Errorf("cannot resolve pull request number from '%s'", l)
}
files, err := l.listChangedFiles(SpecOwner, SpecRepo, n)
if err != nil {
return nil, err
}
var filePaths []string
linq.From(files).Select(func(item interface{}) interface{} {
return item.(*github.CommitFile).GetFilename()
}).ToSlice(&filePaths)
readme, err := GetReadmePathFromChangedFiles(l.ctx, l.client, filePaths)
if err != nil {
return nil, fmt.Errorf("cannot resolve pull request link '%s': %+v", l.GetReleaseLink(), err)
}
// we need to check if the associated PR has been merged
merged, err := l.checkStatus(SpecOwner, SpecRepo, n)
if err != nil {
return nil, err
}
if !merged {
return result{
readme: readme,
code: CodePRNotMerged,
}, nil
}
return getResult(readme), nil
}
// String ...
func (l pullRequestLink) String() string {
return l.GetReleaseLink()
}
// getPullRequestNumber returns the PR number from a PR link which should be in this form: {number}(/something)?
func (l pullRequestLink) getPullRequestNumber() (int, error) {
segments := strings.Split(strings.TrimPrefix(l.GetReleaseLink(), PullRequestPrefix), "/")
return strconv.Atoi(segments[0])
}
func (l pullRequestLink) checkStatus(owner, repo string, number int) (bool, error) {
merged, _, err := l.client.PullRequests.IsMerged(l.ctx, owner, repo, number)
if err != nil {
return false, err
}
return merged, nil
}
func (l pullRequestLink) listChangedFiles(owner, repo string, number int) ([]*github.CommitFile, error) {
opt := &github.ListOptions{
PerPage: 10,
}
var files []*github.CommitFile
for {
f, resp, err := l.client.PullRequests.ListFiles(l.ctx, owner, repo, number, opt)
if err != nil {
return nil, err
}
files = append(files, f...)
if resp.NextPage == 0 {
break
}
opt.Page = resp.NextPage
}
return files, nil
}
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