compression - 如何在 Squeak Smalltalk 中压缩目录？

Question

如何在 Squeak Smalltalk 中压缩目录？我在 StandardFileStream 中找到了 compressFile 方法，但我不知道如何压缩多个文件或目录。我尝试了 System-Compression 类，但运气不佳。提前致谢!

这就是我现在所拥有的。我在文件名的末尾添加时间戳，所以在这里我想把所有以给定文件名开头的文件放入一个 zip 或 gzip 文件中。

compressFile: aFileName in: aDirectory

| zipped buffer unzipped zipFileName |
zipFileName _ aFileName copyUpTo: $. .
zipped _ aDirectory newFileNamed: (zipFileName, FileDirectory dot, 'zip').
zipped binary; setFileTypeToObject.
zipped _ ZipWriteStream on: zipped.
buffer _ ByteArray new: 50000.  
aDirectory fileNames do: [:f |
    (f beginsWith: zipFileName) ifTrue: [
        unzipped _ aDirectory readOnlyFileNamed: (aDirectory fullNameFor: f).
        unzipped binary.
        [unzipped atEnd] whileFalse:[
            zipped nextPutAll: (unzipped nextInto: buffer)].
        unzipped close]].
zipped close.

Answer 1

ZipWriteStream只是一个用于压缩的辅助类，它不知道一个合适的 ZIP 文件是如何布局的，包括所有的头和目录信息等。你想使用 ZipArchive类(class)。

"first, construct archive layout in memory"
zip := ZipArchive new.
zip addFile: 'foo.txt'.
zip addFile: 'bar.txt' as: 'xyz.txt'.
zip addTree: dir match: [:entry | entry name beginswith: 'baz'].
"then, write archive to disk, compressing each member"
file := dest newFileNamed: 'test.zip'.
zip writeTo: file.
file close.