Golang log.Infof函数代码示例

func repairModified(store *storage.Storage, modified fileIdAndInfoMap, pretend bool, fingerprintAlgorithm string) error {
	log.Infof(2, "repairing modified files")

	for path, fileIdAndStat := range modified {
		fileId := fileIdAndStat.fileId
		stat := fileIdAndStat.stat

		log.Infof(1, "%v: modified", path)

		fingerprint, err := fingerprint.Create(path, fingerprintAlgorithm)
		if err != nil {
			return fmt.Errorf("%v: could not create fingerprint: %v", path, err)
		}

		if !pretend {
			_, err := store.UpdateFile(fileId, path, fingerprint, stat.ModTime(), stat.Size(), stat.IsDir())
			if err != nil {
				return fmt.Errorf("%v: could not update file in database: %v", path, err)
			}
		}

	}

	return nil
}

func statusCheckFile(file *entities.File, report *StatusReport) error {
	relPath := path.Rel(file.Path())

	log.Infof(2, "%v: checking file status.", file.Path())

	stat, err := os.Stat(file.Path())
	if err != nil {
		switch {
		case os.IsNotExist(err):
			log.Infof(2, "%v: file is missing.", file.Path())

			report.AddRow(Row{relPath, MISSING})
			return nil
		case os.IsPermission(err):
			log.Warnf("%v: permission denied.", file.Path())
		case strings.Contains(err.Error(), "not a directory"):
			report.AddRow(Row{relPath, MISSING})
			return nil
		default:
			return fmt.Errorf("%v: could not stat: %v", file.Path(), err)
		}
	} else {
		if stat.Size() != file.Size || stat.ModTime().UTC() != file.ModTime {
			log.Infof(2, "%v: file is modified.", file.Path())

			report.AddRow(Row{relPath, MODIFIED})
		} else {
			log.Infof(2, "%v: file is unchanged.", file.Path())

			report.AddRow(Row{relPath, TAGGED})
		}
	}

	return nil
}

func (vfs FuseVfs) Rmdir(name string, context *fuse.Context) fuse.Status {
	log.Infof(2, "BEGIN Rmdir(%v)", name)
	defer log.Infof(2, "END Rmdir(%v)", name)

	path := vfs.splitPath(name)

	switch path[0] {
	case tagsDir:
		if len(path) != 2 {
			// can only remove top-level tag directories
			return fuse.EPERM
		}

		tagName := path[1]
		tag, err := vfs.store.TagByName(tagName)
		if err != nil {
			log.Fatalf("could not retrieve tag '%v': %v", tagName, err)
		}
		if tag == nil {
			return fuse.ENOENT
		}

		count, err := vfs.store.FileTagCountByTagId(tag.Id)
		if err != nil {
			log.Fatalf("could not retrieve file-tag count for tag '%v': %v", tagName, err)
		}
		if count > 0 {
			return fuse.Status(syscall.ENOTEMPTY)
		}

		if err := vfs.store.DeleteTag(tag.Id); err != nil {
			log.Fatalf("could not delete tag '%v': %v", tagName, err)
		}

		if err := vfs.store.Commit(); err != nil {
			log.Fatalf("could not commit transaction: %v", err)
		}

		return fuse.OK
	case queriesDir:
		if len(path) != 2 {
			// can only remove top-level queries directories
			return fuse.EPERM
		}

		text := path[1]

		if err := vfs.store.DeleteQuery(text); err != nil {
			log.Fatalf("could not remove tag '%v': %v", name, err)
		}

		if err := vfs.store.Commit(); err != nil {
			log.Fatalf("could not commit transaction: %v", err)
		}

		return fuse.OK
	}

	return fuse.ENOSYS
}

func (vfs FuseVfs) getQueryAttr() (*fuse.Attr, fuse.Status) {
	log.Infof(2, "BEGIN getQueryAttr")
	defer log.Infof(2, "END getQueryAttr")

	now := time.Now()
	return &fuse.Attr{Mode: fuse.S_IFDIR | 0755, Nlink: 2, Size: 0, Mtime: uint64(now.Unix()), Mtimensec: uint32(now.Nanosecond())}, fuse.OK
}

func (vfs FuseVfs) openQueryEntryDir(path []string) ([]fuse.DirEntry, fuse.Status) {
	log.Infof(2, "BEGIN openQueryEntryDir(%v)", path)
	defer log.Infof(2, "END openQueryEntryDir(%v)", path)

	queryText := path[0]

	expression, err := query.Parse(queryText)
	if err != nil {
		return nil, fuse.ENOENT
	}

	tagNames := query.TagNames(expression)
	tags, err := vfs.store.TagsByNames(tagNames)
	for _, tagName := range tagNames {
		if !containsTag(tags, tagName) {
			return nil, fuse.ENOENT
		}
	}

	files, err := vfs.store.QueryFiles(expression)
	if err != nil {
		log.Fatalf("could not query files: %v", err)
	}

	entries := make([]fuse.DirEntry, 0, len(files))
	for _, file := range files {
		linkName := vfs.getLinkName(file)
		entries = append(entries, fuse.DirEntry{Name: linkName, Mode: fuse.S_IFLNK})
	}

	return entries, fuse.OK
}

func (vfs FuseVfs) Mkdir(name string, mode uint32, context *fuse.Context) fuse.Status {
	log.Infof(2, "BEGIN Mkdir(%v)", name)
	defer log.Infof(2, "END Mkdir(%v)", name)

	path := vfs.splitPath(name)

	if len(path) != 2 {
		return fuse.EPERM
	}

	switch path[0] {
	case tagsDir:
		name := path[1]

		if _, err := vfs.store.AddTag(name); err != nil {
			log.Fatalf("could not create tag '%v': %v", name, err)
		}

		if err := vfs.store.Commit(); err != nil {
			log.Fatalf("could not commit transaction: %v", err)
		}

		return fuse.OK
	case queriesDir:
		return fuse.EINVAL
	}

	return fuse.ENOSYS
}

func (vfs FuseVfs) topDirectories() ([]fuse.DirEntry, fuse.Status) {
	log.Infof(2, "BEGIN topDirectories")
	defer log.Infof(2, "END topDirectories")

	entries := []fuse.DirEntry{fuse.DirEntry{Name: tagsDir, Mode: fuse.S_IFDIR},
		fuse.DirEntry{Name: queriesDir, Mode: fuse.S_IFDIR}}
	return entries, fuse.OK
}

func (vfs FuseVfs) Open(name string, flags uint32, context *fuse.Context) (nodefs.File, fuse.Status) {
	log.Infof(2, "BEGIN Open(%v)", name)
	defer log.Infof(2, "END Open(%v)", name)

	if name == filepath.Join(queriesDir, queryHelpFilename) {
		return nodefs.NewDataFile([]byte(queryDirHelp)), fuse.OK
	}

	return nil, fuse.ENOSYS
}

func (vfs FuseVfs) openTaggedEntryDir(path []string) ([]fuse.DirEntry, fuse.Status) {
	log.Infof(2, "BEGIN openTaggedEntryDir(%v)", path)
	defer log.Infof(2, "END openTaggedEntryDir(%v)", path)

	expression := query.HasAll(path)
	files, err := vfs.store.QueryFiles(expression)
	if err != nil {
		log.Fatalf("could not query files: %v", err)
	}

	tagNames := make(map[string]interface{}, len(path))
	for _, tagName := range path {
		tagNames[tagName] = nil
	}

	furtherTagNames := make([]string, 0, 10)
	for _, file := range files {
		fileTags, err := vfs.store.FileTagsByFileId(file.Id)
		if err != nil {
			log.Fatalf("could not retrieve file-tags for file '%v': %v", file.Id, err)
		}

		tagIds := make([]uint, len(fileTags))
		for index, fileTag := range fileTags {
			tagIds[index] = fileTag.TagId
		}

		tags, err := vfs.store.TagsByIds(tagIds)
		if err != nil {
			log.Fatalf("could not retrieve tags: %v", err)
		}

		for _, tag := range tags {
			_, has := tagNames[tag.Name]
			if !has {
				if !containsName(furtherTagNames, tag.Name) {
					furtherTagNames = append(furtherTagNames, tag.Name)
				}
			}
		}
	}

	entries := make([]fuse.DirEntry, 0, len(files)+len(furtherTagNames))
	for _, tagName := range furtherTagNames {
		entries = append(entries, fuse.DirEntry{Name: tagName, Mode: fuse.S_IFDIR | 0755})
	}
	for _, file := range files {
		linkName := vfs.getLinkName(file)
		entries = append(entries, fuse.DirEntry{Name: linkName, Mode: fuse.S_IFLNK})
	}

	return entries, fuse.OK
}

func (vfs FuseVfs) Readlink(name string, context *fuse.Context) (string, fuse.Status) {
	log.Infof(2, "BEGIN Readlink(%v)", name)
	defer log.Infof(2, "END Readlink(%v)", name)

	path := vfs.splitPath(name)
	switch path[0] {
	case tagsDir, queriesDir:
		return vfs.readTaggedEntryLink(path[1:])
	}

	return "", fuse.ENOENT
}

func (vfs FuseVfs) getTagsAttr() (*fuse.Attr, fuse.Status) {
	log.Infof(2, "BEGIN getTagsAttr")
	defer log.Infof(2, "END getTagsAttr")

	tagCount, err := vfs.store.TagCount()
	if err != nil {
		log.Fatalf("could not get tag count: %v", err)
	}

	now := time.Now()
	return &fuse.Attr{Mode: fuse.S_IFDIR | 0755, Nlink: 2, Size: uint64(tagCount), Mtime: uint64(now.Unix()), Mtimensec: uint32(now.Nanosecond())}, fuse.OK
}

func (vfs FuseVfs) getQueryEntryAttr(path []string) (*fuse.Attr, fuse.Status) {
	log.Infof(2, "BEGIN getQueryEntryAttr(%v)", path)
	defer log.Infof(2, "END getQueryEntryAttr(%v)", path)

	pathLength := len(path)
	name := path[pathLength-1]

	if len(path) == 1 && path[0] == queryHelpFilename {
		now := time.Now()
		return &fuse.Attr{Mode: fuse.S_IFREG | 0444, Nlink: 1, Size: uint64(len(queryDirHelp)), Mtime: uint64(now.Unix()), Mtimensec: uint32(now.Nanosecond())}, fuse.OK
	}

	if len(path) > 1 {
		fileId := vfs.parseFileId(name)
		if fileId != 0 {
			return vfs.getFileEntryAttr(fileId)
		}

		return nil, fuse.ENOENT
	}

	queryText := path[0]

	if queryText[len(queryText)-1] == ' ' {
		// prevent multiple entries for same query when typing path in a GUI
		return nil, fuse.ENOENT
	}

	expression, err := query.Parse(queryText)
	if err != nil {
		return nil, fuse.ENOENT
	}

	tagNames := query.TagNames(expression)
	tags, err := vfs.store.TagsByNames(tagNames)
	for _, tagName := range tagNames {
		if !containsTag(tags, tagName) {
			return nil, fuse.ENOENT
		}
	}

	_, _ = vfs.store.AddQuery(queryText)

	if err := vfs.store.Commit(); err != nil {
		log.Fatalf("could not commit transaction: %v", err)
	}

	now := time.Now()
	return &fuse.Attr{Mode: fuse.S_IFDIR | 0755, Nlink: 2, Size: uint64(0), Mtime: uint64(now.Unix()), Mtimensec: uint32(now.Nanosecond())}, fuse.OK
}

func repairMissing(store *storage.Storage, missing databaseFileMap, pretend, force bool) error {
	for path, dbFile := range missing {
		if force && !pretend {
			if err := store.DeleteFileTagsByFileId(dbFile.Id); err != nil {
				return fmt.Errorf("%v: could not delete file-tags: %v", path, err)
			}

			log.Infof(1, "%v: removed", path)
		} else {
			log.Infof(1, "%v: missing", path)
		}
	}

	return nil
}

func (vfs FuseVfs) Unlink(name string, context *fuse.Context) fuse.Status {
	log.Infof(2, "BEGIN Unlink(%v)", name)
	defer log.Infof(2, "END Unlink(%v)", name)

	fileId := vfs.parseFileId(name)
	if fileId == 0 {
		// can only unlink file symbolic links
		return fuse.EPERM
	}

	file, err := vfs.store.File(fileId)
	if err != nil {
		log.Fatal("could not retrieve file '%v': %v", fileId, err)
	}
	if file == nil {
		// reply ok if file doesn't exist otherwise recursive deletes fail
		return fuse.OK
	}
	path := vfs.splitPath(name)

	switch path[0] {
	case tagsDir:
		tagName := path[len(path)-2]
		//TODO value name

		tag, err := vfs.store.TagByName(tagName)
		if err != nil {
			log.Fatal(err)
		}
		if tag == nil {
			log.Fatalf("could not retrieve tag '%v'.", tagName)
		}

		if err = vfs.store.DeleteFileTag(fileId, tag.Id, 0); err != nil {
			log.Fatal(err)
		}

		if err := vfs.store.Commit(); err != nil {
			log.Fatalf("could not commit transaction: %v", err)
		}

		return fuse.OK
	case queriesDir:
		return fuse.EPERM
	}

	return fuse.ENOSYS
}

func listValuesForTag(store *storage.Storage, tagName string, showCount, onePerLine bool) error {
	tag, err := store.TagByName(tagName)
	if err != nil {
		return fmt.Errorf("could not retrieve tag '%v': %v", tagName, err)
	}
	if tag == nil {
		return fmt.Errorf("no such tag, '%v'.", tagName)
	}

	log.Infof(2, "retrieving values for tag '%v'.", tagName)

	values, err := store.ValuesByTag(tag.Id)
	if err != nil {
		return fmt.Errorf("could not retrieve values for tag '%v': %v", tagName, err)
	}

	if showCount {
		fmt.Println(len(values))
	} else {
		if onePerLine {
			for _, value := range values {
				fmt.Println(value.Name)
			}
		} else {
			valueNames := make([]string, len(values))
			for index, value := range values {
				valueNames[index] = value.Name
			}

			format.Columns(valueNames, terminalWidth())
		}
	}

	return nil
}