字体元数据是如何存储的？

Question

下载字体后，您可以看到它有很多元数据。例如，如果您下载 Sansation字体 并运行 mdls Sansation_Regular.ttf 你会得到这个输出：

com_apple_ats_name_family      = (
    Sansation
)
com_apple_ats_name_fond        = (
    "Sansation Regular"
)
com_apple_ats_name_full        = (
    "Sansation Regular"
)
com_apple_ats_name_postscript  = (
    "Sansation Regular"
)
com_apple_ats_name_style       = (
    Regular
)
com_apple_ats_names            = (
    "Bernd Montag",
    Regular,
    Sansation,
    "Sansation Regular",
    "Version 1.31",
    "\U00a9 2011 Bernd Montag"
)
kMDItemAuthors                 = (
    "Bernd Montag"
)
kMDItemContentCreationDate     = 2012-10-31 15:59:10 +0000
kMDItemContentModificationDate = 2012-10-31 15:59:10 +0000
kMDItemContentType             = "public.truetype-ttf-font"
kMDItemContentTypeTree         = (
    "public.truetype-ttf-font",
    "public.truetype-font",
    "public.font",
    "public.data",
    "public.item"
)
kMDItemCopyright               = "© 2011 Bernd Montag"
kMDItemDateAdded               = 2013-11-21 16:21:51 +0000
kMDItemDisplayName             = "Sansation_Regular.ttf"
kMDItemFonts                   = (
    Regular,
    Sansation,
    "Sansation Regular"
)
kMDItemFSContentChangeDate     = 2012-10-31 15:59:10 +0000
kMDItemFSCreationDate          = 2012-10-31 15:59:10 +0000
kMDItemFSCreatorCode           = ""
kMDItemFSFinderFlags           = 0
kMDItemFSHasCustomIcon         = 0
kMDItemFSInvisible             = 0
kMDItemFSIsExtensionHidden     = 0
kMDItemFSIsStationery          = 0
kMDItemFSLabel                 = 0
kMDItemFSName                  = "Sansation_Regular.ttf"
kMDItemFSNodeCount             = 78464
kMDItemFSOwnerGroupID          = 20
kMDItemFSOwnerUserID           = 501
kMDItemFSSize                  = 78464
kMDItemFSTypeCode              = ""
kMDItemKind                    = "TrueType font"
kMDItemLogicalSize             = 78464
kMDItemPhysicalSize            = 81920
kMDItemVersion                 = "Version 1.31"

现在，如果您在 git 存储库中检查此文件，将其推送到远程服务器并克隆该存储库，则在此过程中会丢失大量元数据。克隆后，运行 mdls Sansation_Regular.ttf 给出以下输出：

kMDItemFSContentChangeDate = 2013-11-21 16:31:26 +0000
kMDItemFSCreationDate      = 2013-11-21 16:31:26 +0000
kMDItemFSCreatorCode       = ""
kMDItemFSFinderFlags       = 0
kMDItemFSHasCustomIcon     = 0
kMDItemFSInvisible         = 0
kMDItemFSIsExtensionHidden = 0
kMDItemFSIsStationery      = 0
kMDItemFSLabel             = 0
kMDItemFSName              = "Sansation_Regular.ttf"
kMDItemFSNodeCount         = 78464
kMDItemFSOwnerGroupID      = 0
kMDItemFSOwnerUserID       = 501
kMDItemFSSize              = (null)
kMDItemFSTypeCode          = ""

我试着跑 mdimport Sansation_Regular.ttf 但是 丢失的 属性没有回来。

发生了什么？有没有办法要求系统重新创建所有丢失的元数据属性？

我运行的是 OS X 10.8.5。

Answer 1

事实证明元数据不可用，因为我将存储库克隆到了 /tmp Spotlight 未索引的目录。将存储库克隆到 Spotlight 索引的某个位置效果很好。

Answer 2

那些 com_apple_ats_name_family 键看起来像扩展属性名称，其中“.”替换为“_”。尝试跑步 xattr -l Sansation_Regular.ttf 在原始文件上查看它是否有一堆扩展属性，这些属性在您签入时没有与文件一起复制。