mirror of
https://codeberg.org/forgejo/forgejo.git
synced 2024-08-22 04:28:06 +02:00
210 lines
5.9 KiB
Go
210 lines
5.9 KiB
Go
// Copyright 2020 The Gitea Authors. All rights reserved.
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// Copyright 2024 The Forgejo Authors c/o Codeberg e.V.. All rights reserved.
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// SPDX-License-Identifier: MIT
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//go:build !gogit
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package git
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import (
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"bytes"
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"cmp"
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"io"
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"code.gitea.io/gitea/modules/analyze"
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"code.gitea.io/gitea/modules/log"
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"code.gitea.io/gitea/modules/optional"
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"github.com/go-enry/go-enry/v2"
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)
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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]int64, error) {
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// We will feed the commit IDs in order into cat-file --batch, followed by blobs as necessary.
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// so let's create a batch stdin and stdout
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batchStdinWriter, batchReader, cancel := repo.CatFileBatch(repo.Ctx)
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defer cancel()
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writeID := func(id string) error {
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_, err := batchStdinWriter.Write([]byte(id + "\n"))
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return err
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}
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if err := writeID(commitID); err != nil {
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return nil, err
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}
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shaBytes, typ, size, err := ReadBatchLine(batchReader)
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if typ != "commit" {
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log.Debug("Unable to get commit for: %s. Err: %v", commitID, err)
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return nil, ErrNotExist{commitID, ""}
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}
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sha, err := NewIDFromString(string(shaBytes))
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if err != nil {
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log.Debug("Unable to get commit for: %s. Err: %v", commitID, err)
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return nil, ErrNotExist{commitID, ""}
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}
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commit, err := CommitFromReader(repo, sha, io.LimitReader(batchReader, size))
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if err != nil {
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log.Debug("Unable to get commit for: %s. Err: %v", commitID, err)
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return nil, err
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}
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if _, err = batchReader.Discard(1); err != nil {
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return nil, err
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}
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tree := commit.Tree
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entries, err := tree.ListEntriesRecursiveWithSize()
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if err != nil {
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return nil, err
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}
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checker, err := repo.GitAttributeChecker(commitID, LinguistAttributes...)
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if err != nil {
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return nil, err
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}
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defer checker.Close()
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contentBuf := bytes.Buffer{}
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var content []byte
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// sizes contains the current calculated size of all files by language
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sizes := make(map[string]int64)
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// by default we will only count the sizes of programming languages or markup languages
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// unless they are explicitly set using linguist-language
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includedLanguage := map[string]bool{}
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// or if there's only one language in the repository
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firstExcludedLanguage := ""
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firstExcludedLanguageSize := int64(0)
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isTrue := func(v optional.Option[bool]) bool {
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return v.ValueOrDefault(false)
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}
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isFalse := func(v optional.Option[bool]) bool {
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return !v.ValueOrDefault(true)
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}
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for _, f := range entries {
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select {
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case <-repo.Ctx.Done():
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return sizes, repo.Ctx.Err()
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default:
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}
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contentBuf.Reset()
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content = contentBuf.Bytes()
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if f.Size() == 0 {
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continue
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}
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isVendored := optional.None[bool]()
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isGenerated := optional.None[bool]()
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isDocumentation := optional.None[bool]()
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isDetectable := optional.None[bool]()
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attrs, err := checker.CheckPath(f.Name())
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if err == nil {
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isVendored = attrs["linguist-vendored"].Bool()
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isGenerated = attrs["linguist-generated"].Bool()
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isDocumentation = attrs["linguist-documentation"].Bool()
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isDetectable = attrs["linguist-detectable"].Bool()
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if language := cmp.Or(
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attrs["linguist-language"].String(),
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attrs["gitlab-language"].Prefix(),
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); language != "" {
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// group languages, such as Pug -> HTML; SCSS -> CSS
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group := enry.GetLanguageGroup(language)
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if len(group) != 0 {
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language = group
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}
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// this language will always be added to the size
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sizes[language] += f.Size()
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continue
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}
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}
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if isFalse(isDetectable) || isTrue(isVendored) || isTrue(isDocumentation) ||
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(!isFalse(isVendored) && analyze.IsVendor(f.Name())) ||
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enry.IsDotFile(f.Name()) ||
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enry.IsConfiguration(f.Name()) ||
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(!isFalse(isDocumentation) && enry.IsDocumentation(f.Name())) {
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continue
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}
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// If content can not be read or file is too big just do detection by filename
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if f.Size() <= bigFileSize {
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if err := writeID(f.ID.String()); err != nil {
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return nil, err
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}
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_, _, size, err := ReadBatchLine(batchReader)
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if err != nil {
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log.Debug("Error reading blob: %s Err: %v", f.ID.String(), err)
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return nil, err
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}
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sizeToRead := size
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discard := int64(1)
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if size > fileSizeLimit {
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sizeToRead = fileSizeLimit
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discard = size - fileSizeLimit + 1
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}
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_, err = contentBuf.ReadFrom(io.LimitReader(batchReader, sizeToRead))
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if err != nil {
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return nil, err
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}
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content = contentBuf.Bytes()
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if err := DiscardFull(batchReader, discard); err != nil {
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return nil, err
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}
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}
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if !isTrue(isGenerated) && enry.IsGenerated(f.Name(), content) {
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continue
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}
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// FIXME: Why can't we split this and the IsGenerated tests to avoid reading the blob unless absolutely necessary?
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// - eg. do the all the detection tests using filename first before reading content.
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language := analyze.GetCodeLanguage(f.Name(), content)
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if language == "" {
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continue
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}
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// group languages, such as Pug -> HTML; SCSS -> CSS
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group := enry.GetLanguageGroup(language)
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if group != "" {
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language = group
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}
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included, checked := includedLanguage[language]
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langType := enry.GetLanguageType(language)
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if !checked {
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included = langType == enry.Programming || langType == enry.Markup
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if !included && (isTrue(isDetectable) || (langType == enry.Prose && isFalse(isDocumentation))) {
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included = true
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}
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includedLanguage[language] = included
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}
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if included {
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sizes[language] += f.Size()
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} else if len(sizes) == 0 && (firstExcludedLanguage == "" || firstExcludedLanguage == language) {
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// Only consider Programming or Markup languages as fallback
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if !(langType == enry.Programming || langType == enry.Markup) {
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continue
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}
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firstExcludedLanguage = language
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firstExcludedLanguageSize += f.Size()
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}
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}
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// If there are no included languages add the first excluded language
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if len(sizes) == 0 && firstExcludedLanguage != "" {
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sizes[firstExcludedLanguage] = firstExcludedLanguageSize
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}
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return mergeLanguageStats(sizes), nil
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}
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