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// Copyright 2020 The Gogs Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package gitutil
import (
"fmt"
"strconv"
"time"
"github.com/gogs/git-module"
"github.com/pkg/errors"
log "unknwon.dev/clog/v2"
)
// PullRequestMeta contains metadata for a pull request.
type PullRequestMeta struct {
// The merge base of the pull request.
MergeBase string
// The commits that are requested to be merged.
Commits []*git.Commit
// The number of files changed.
NumFiles int
}
func (module) PullRequestMeta(headPath, basePath, headBranch, baseBranch string) (*PullRequestMeta, error) {
tmpRemoteBranch := baseBranch
// We need to create a temporary remote when the pull request is sent from a forked repository.
if headPath != basePath {
tmpRemote := strconv.FormatInt(time.Now().UnixNano(), 10)
err := Module.RemoteAdd(headPath, tmpRemote, basePath, git.RemoteAddOptions{Fetch: true})
if err != nil {
return nil, fmt.Errorf("add remote: %v", err)
}
defer func() {
err := Module.RemoteRemove(headPath, tmpRemote)
if err != nil {
log.Error("Failed to remove remote %q [path: %s]: %v", tmpRemote, headPath, err)
return
}
}()
tmpRemoteBranch = "remotes/" + tmpRemote + "/" + baseBranch
}
mergeBase, err := Module.MergeBase(headPath, tmpRemoteBranch, headBranch)
if err != nil {
return nil, errors.Wrap(err, "get merge base")
}
commits, err := Module.Log(headPath, mergeBase+"..."+headBranch)
if err != nil {
return nil, errors.Wrap(err, "get commits")
}
// Count number of changed files
names, err := Module.DiffNameOnly(headPath, tmpRemoteBranch, headBranch, git.DiffNameOnlyOptions{NeedsMergeBase: true})
if err != nil {
return nil, errors.Wrap(err, "get changed files")
}
return &PullRequestMeta{
MergeBase: mergeBase,
Commits: commits,
NumFiles: len(names),
}, nil
}
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