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116 lines
2.4 KiB
116 lines
2.4 KiB
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Use of this source code is governed by a MIT-style
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// license that can be found in the LICENSE file.
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package git
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import (
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"bytes"
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"io"
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"io/ioutil"
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"math"
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"path/filepath"
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"github.com/src-d/enry/v2"
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"gopkg.in/src-d/go-git.v4"
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"gopkg.in/src-d/go-git.v4/plumbing"
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"gopkg.in/src-d/go-git.v4/plumbing/object"
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)
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const fileSizeLimit int64 = 16 * 1024 * 1024
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// GetLanguageStats calculates language stats for git repository at specified commit
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func (repo *Repository) GetLanguageStats(commitID string) (map[string]float32, error) {
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r, err := git.PlainOpen(repo.Path)
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if err != nil {
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return nil, err
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}
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rev, err := r.ResolveRevision(plumbing.Revision(commitID))
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if err != nil {
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return nil, err
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}
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commit, err := r.CommitObject(*rev)
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if err != nil {
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return nil, err
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}
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tree, err := commit.Tree()
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if err != nil {
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return nil, err
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}
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sizes := make(map[string]int64)
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var total int64
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err = tree.Files().ForEach(func(f *object.File) error {
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if enry.IsVendor(f.Name) || enry.IsDotFile(f.Name) ||
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enry.IsDocumentation(f.Name) || enry.IsConfiguration(f.Name) {
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return nil
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}
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// TODO: Use .gitattributes file for linguist overrides
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language, ok := enry.GetLanguageByExtension(f.Name)
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if !ok {
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if language, ok = enry.GetLanguageByFilename(f.Name); !ok {
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content, err := readFile(f, fileSizeLimit)
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if err != nil {
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return nil
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}
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language = enry.GetLanguage(filepath.Base(f.Name), content)
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if language == enry.OtherLanguage {
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return nil
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}
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}
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}
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if language != "" {
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sizes[language] += f.Size
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total += f.Size
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}
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return nil
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})
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if err != nil {
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return nil, err
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}
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stats := make(map[string]float32)
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var otherPerc float32 = 100
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for language, size := range sizes {
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perc := float32(math.Round(float64(size)/float64(total)*1000) / 10)
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if perc <= 0.1 {
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continue
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}
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otherPerc -= perc
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stats[language] = perc
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}
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otherPerc = float32(math.Round(float64(otherPerc)*10) / 10)
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if otherPerc > 0 {
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stats["other"] = otherPerc
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}
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return stats, nil
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}
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func readFile(f *object.File, limit int64) ([]byte, error) {
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r, err := f.Reader()
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if err != nil {
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return nil, err
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}
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defer r.Close()
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if limit <= 0 {
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return ioutil.ReadAll(r)
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}
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size := f.Size
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if limit > 0 && size > limit {
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size = limit
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}
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buf := bytes.NewBuffer(nil)
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buf.Grow(int(size))
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_, err = io.Copy(buf, io.LimitReader(r, limit))
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return buf.Bytes(), err
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}
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