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package commit
import (
"context"
"io/ioutil"
"sort"
"gitlab.com/gitlab-org/gitaly/internal/git"
"gitlab.com/gitlab-org/gitaly/internal/helper"
"gitlab.com/gitlab-org/gitaly/internal/helper/text"
"gitlab.com/gitlab-org/gitaly/internal/linguist"
"gitlab.com/gitlab-org/gitaly/internal/service/ref"
"gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
)
func (*server) CommitLanguages(ctx context.Context, req *gitalypb.CommitLanguagesRequest) (*gitalypb.CommitLanguagesResponse, error) {
repo := req.Repository
revision := string(req.Revision)
if revision == "" {
defaultBranch, err := ref.DefaultBranchName(ctx, req.Repository)
if err != nil {
return nil, err
}
revision = string(defaultBranch)
}
commitID, err := lookupRevision(ctx, repo, revision)
if err != nil {
return nil, err
}
repoPath, err := helper.GetRepoPath(repo)
if err != nil {
return nil, err
}
stats, err := linguist.Stats(ctx, repoPath, commitID)
if err != nil {
return nil, err
}
resp := &gitalypb.CommitLanguagesResponse{}
if len(stats) == 0 {
return resp, nil
}
total := 0
for _, count := range stats {
total += count
}
if total == 0 {
return nil, status.Errorf(codes.Internal, "linguist stats added up to zero: %v", stats)
}
for lang, count := range stats {
l := &gitalypb.CommitLanguagesResponse_Language{
Name: lang,
Share: float32(100*count) / float32(total),
Color: linguist.Color(lang),
}
resp.Languages = append(resp.Languages, l)
}
sort.Sort(languageSorter(resp.Languages))
return resp, nil
}
type languageSorter []*gitalypb.CommitLanguagesResponse_Language
func (ls languageSorter) Len() int { return len(ls) }
func (ls languageSorter) Swap(i, j int) { ls[i], ls[j] = ls[j], ls[i] }
func (ls languageSorter) Less(i, j int) bool { return ls[i].Share > ls[j].Share }
func lookupRevision(ctx context.Context, repo *gitalypb.Repository, revision string) (string, error) {
revParse, err := git.Command(ctx, repo, "rev-parse", revision)
if err != nil {
return "", err
}
revParseBytes, err := ioutil.ReadAll(revParse)
if err != nil {
return "", err
}
return text.ChompBytes(revParseBytes), nil
}
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