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gitea/modules/git/repo_language_stats_gogit.go
2024-02-24 18:46:49 +00:00

178 lines
4.4 KiB
Go

// Copyright 2020 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
//go:build gogit
package git
import (
"bytes"
"io"
"code.gitea.io/gitea/modules/analyze"
"code.gitea.io/gitea/modules/optional"
"github.com/go-enry/go-enry/v2"
"github.com/go-git/go-git/v5"
"github.com/go-git/go-git/v5/plumbing"
"github.com/go-git/go-git/v5/plumbing/object"
)
// GetLanguageStats calculates language stats for git repository at specified commit
func (repo *Repository) GetLanguageStats(commitID string) (map[string]int64, error) {
r, err := git.PlainOpen(repo.Path)
if err != nil {
return nil, err
}
rev, err := r.ResolveRevision(plumbing.Revision(commitID))
if err != nil {
return nil, err
}
commit, err := r.CommitObject(*rev)
if err != nil {
return nil, err
}
tree, err := commit.Tree()
if err != nil {
return nil, err
}
checker, deferable := repo.CheckAttributeReader(commitID)
defer deferable()
// sizes contains the current calculated size of all files by language
sizes := make(map[string]int64)
// by default we will only count the sizes of programming languages or markup languages
// unless they are explicitly set using linguist-language
includedLanguage := map[string]bool{}
// or if there's only one language in the repository
firstExcludedLanguage := ""
firstExcludedLanguageSize := int64(0)
err = tree.Files().ForEach(func(f *object.File) error {
if f.Size == 0 {
return nil
}
isVendored := optional.None[bool]()
isGenerated := optional.None[bool]()
isDocumentation := optional.None[bool]()
isDetectable := optional.None[bool]()
if checker != nil {
attrs, err := checker.CheckPath(f.Name)
if err == nil {
isVendored = AttributeToBool(attrs, AttributeLinguistVendored)
if isVendored.ValueOrDefault(false) {
return nil
}
isGenerated = AttributeToBool(attrs, AttributeLinguistGenerated)
if isGenerated.ValueOrDefault(false) {
return nil
}
isDocumentation = AttributeToBool(attrs, AttributeLinguistDocumentation)
if isDocumentation.ValueOrDefault(false) {
return nil
}
isDetectable = AttributeToBool(attrs, AttributeLinguistDetectable)
if !isDetectable.ValueOrDefault(true) {
return nil
}
hasLanguage := TryReadLanguageAttribute(attrs)
if hasLanguage.Value() != "" {
language := hasLanguage.Value()
// group languages, such as Pug -> HTML; SCSS -> CSS
group := enry.GetLanguageGroup(language)
if len(group) != 0 {
language = group
}
// this language will always be added to the size
sizes[language] += f.Size
return nil
}
}
}
if (!isVendored.Has() && analyze.IsVendor(f.Name)) ||
enry.IsDotFile(f.Name) ||
(!isDocumentation.Has() && enry.IsDocumentation(f.Name)) ||
enry.IsConfiguration(f.Name) {
return nil
}
// If content can not be read or file is too big just do detection by filename
var content []byte
if f.Size <= bigFileSize {
content, _ = readFile(f, fileSizeLimit)
}
if !isGenerated.Has() && enry.IsGenerated(f.Name, content) {
return nil
}
language := analyze.GetCodeLanguage(f.Name, content)
if language == enry.OtherLanguage || language == "" {
return nil
}
// group languages, such as Pug -> HTML; SCSS -> CSS
group := enry.GetLanguageGroup(language)
if group != "" {
language = group
}
included, checked := includedLanguage[language]
if !checked {
langtype := enry.GetLanguageType(language)
included = langtype == enry.Programming || langtype == enry.Markup
includedLanguage[language] = included
}
if included || isDetectable.ValueOrDefault(false) {
sizes[language] += f.Size
} else if len(sizes) == 0 && (firstExcludedLanguage == "" || firstExcludedLanguage == language) {
firstExcludedLanguage = language
firstExcludedLanguageSize += f.Size
}
return nil
})
if err != nil {
return nil, err
}
// If there are no included languages add the first excluded language
if len(sizes) == 0 && firstExcludedLanguage != "" {
sizes[firstExcludedLanguage] = firstExcludedLanguageSize
}
return mergeLanguageStats(sizes), nil
}
func readFile(f *object.File, limit int64) ([]byte, error) {
r, err := f.Reader()
if err != nil {
return nil, err
}
defer r.Close()
if limit <= 0 {
return io.ReadAll(r)
}
size := f.Size
if limit > 0 && size > limit {
size = limit
}
buf := bytes.NewBuffer(nil)
buf.Grow(int(size))
_, err = io.Copy(buf, io.LimitReader(r, limit))
return buf.Bytes(), err
}