werf/werf

package gitdata

import (
    "fmt"
    "io/ioutil"
    "os"
    "path/filepath"
    "time"

    "github.com/werf/werf/v2/pkg/util/timestamps"
    "github.com/werf/werf/v2/pkg/volumeutils"
)

type GitRepoDesc struct {
    Path          string
    LastAccessAt  time.Time
    Size          uint64
    CacheBasePath string
}

func (entry *GitRepoDesc) GetPaths() []string {
    return []string{entry.Path}
}

func (entry *GitRepoDesc) GetSize() uint64 {
    return entry.Size
}

func (entry *GitRepoDesc) GetLastAccessAt() time.Time {
    return entry.LastAccessAt
}

func (entry *GitRepoDesc) GetCacheBasePath() string {
    return entry.CacheBasePath
}

func GetExistingGitRepos(cacheVersionRoot string) ([]*GitRepoDesc, error) {
    var res []*GitRepoDesc

    if _, err := os.Stat(cacheVersionRoot); os.IsNotExist(err) {
        return nil, nil
    } else if err != nil {
        return nil, fmt.Errorf("error accessing dir %q: %w", cacheVersionRoot, err)
    }

    files, err := ioutil.ReadDir(cacheVersionRoot)
    if err != nil {
        return nil, fmt.Errorf("error reading dir %q: %w", cacheVersionRoot, err)
    }

    for _, finfo := range files {
        repoPath := filepath.Join(cacheVersionRoot, finfo.Name())

        if !finfo.IsDir() {
            if err := os.RemoveAll(repoPath); err != nil {
                return nil, fmt.Errorf("unable to remove %q: %w", repoPath, err)
            }
        }

        size, err := volumeutils.DirSizeBytes(repoPath)
        if err != nil {
            return nil, fmt.Errorf("error getting dir %q size: %w", repoPath, err)
        }

        lastAccessAtPath := filepath.Join(repoPath, "last_access_at")
        lastAccessAt, err := timestamps.ReadTimestampFile(lastAccessAtPath)
        if err != nil {
            return nil, fmt.Errorf("error reading last access timestamp file %q: %w", lastAccessAtPath, err)
        }

        res = append(res, &GitRepoDesc{
            Path:          repoPath,
            Size:          size,
            LastAccessAt:  lastAccessAt,
            CacheBasePath: cacheVersionRoot,
        })
    }

    return res, nil
}