如何壓縮Squeak Smalltalk中的目錄？

Question

如何壓縮Squeak Smalltalk中的目錄？ 我在StandardFileStream中找到了compressFile方法，但我無法弄清楚如何壓縮多個文件或目錄。 我試驗過System-Compression類，但運氣不好。 提前致謝！

這就是我現在擁有的。 我在文件名末尾添加時間戳，所以在這里我想把所有以給定文件名開頭的文件放入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只是一個用於壓縮的輔助類，它不知道如何ZipWriteStream正確的ZIP文件，包含所有頭文件和目錄信息等。您想使用ZipArchive類。

"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.