Common Lisp ZIP library

   A library for .zip-file reading and writing, written in Common Lisp.

   Credits: David Lichteblau, Tomas Hlavaty. Thanks to everyone who has
   contributed patches.

   Send bug reports to [1]<zip-devel@common-lisp.net> ([2]list
   information).

   Thanks to [3]common-lisp.net for web site and mailing list hosting.
   Please note the repository on [4]github.

   Uses [5]salza2 for compression, [6]flexi-streams for external format
   support, [7]trivial-gray-streams for gray streams portability, and
   includes [8]inflate.cl for decompression.

Recent changes

   2015: Move to github, and backport of changes from downstream fork
   (Thanks to Tomas Hlavaty.)

   2006 -- 2011: During this time a fork occurred. The common-lisp.net
   version of the library received little attention, except that it was
   ported to ASDF2. (Thanks to Faré Rideau.)

   2006: Fixed the gray stream port, including a data corruption bug that
   was in CVS for some time. (Thanks to Kevin Reid and others.) Switched
   to flexi-stream external-format functions for portability. Uses
   trivial-gray-streams now. Allegro 8.0 fix (thanks to Edi Weitz).
   Comment support (thanks to Surendra Singhi). Incompatible change: Don't
   bind *locale* on Allegro anymore.

   2005-04-05: ACL fixes (thank to Edi Weitz). Lispworks port (thanks to
   Sean Ross). Store file-write-date (also fixes FilZip compatibility).

Download

     * Using Quicklisp (if in doubt, this is a good way to get started):
(ql:quickload :zip)
     * From github:
git clone https://github.com/bluelisp/zip
     * Using clbuild2 from github:
clbuild install-from-upstream zip
       -- For the one or two clbuild users out there
     * Using clbuild2 via QuickLisp:
clbuild quickload zip
       -- Ditto
     * Tarball releases -- Unfortunately we are not currently offering a
       release tarball for download.

Portability

   Needs gray streams. The original version had separate support
   out-of-the-box on SBCL, Lispworks, and ACL. The fork briefly introduced
   some features specific to simple-stream / ACL. We believe the library
   to currently be portable to most popular Common Lisp implementations,
   but patches are welcome.

ZIP-file reading

   Zip archives are represented as opaque handles. Entries of the zip-file
   are named by strings and represented as objects, too.

   Function OPEN-ZIPFILE (pathname) => zipfile

   Open .zip-file pathname for reading and return a handle for it.

   Function CLOSE-ZIPFILE (zipfile)

   Close the file handle.

   Macro WITH-ZIPFILE ((var pathname) &body body) => result of body

   Bind var to the result of open-zipfile, evaluate body as an implicit
   progn and call close-zipfile before exiting.

   Function GET-ZIPFILE-ENTRY (name zipfile) => zipfile-entry

   Return an entry handle for the file called name.

   Function ZIPFILE-ENTRIES (zipfile) => hash-table

   Return a hash-table mapping filenames to entry handles for all files
   contained in the zip archive.

   Macro DO-ZIPFILE-ENTRIES ((name-var entry-var zipfile) &body body) =>
   nil

   Map over all entries in zipfile binding name-var and entry-var to each
   file name and entry handle in turn. Establish implicit block named nil
   around the loop.

   Function ZIPFILE-ENTRY-NAME (zipfile-entry) => string

   Return an entry's file name as a string.

   Function ZIPFILE-ENTRY-CONTENTS (entry &optional stream) => see below

   If stream is given, extract entry to the (unsigned-byte 8) stream given
   as the argument. Otherwise, return the entry contents as an
   (unsigned-byte 8) vector.

   Function UNZIP (pathname target-directory &key if-exists verbose) =>
   nil

   Extract all entries from the zip archive at pathname into
   target-directory. if-exists as for [9]cl:open.

ZIP-file writing

   zipwriters are handles used to create zip archives. They are distinct
   from the zip handles used for reading.

   Macro WITH-OUTPUT-TO-ZIPFILE ((var pathname &key if-exists) &body body)

   Function WRITE-ZIPENTRY (zipwriter name data &key file-write-date)

   Append a new entry called name to zipwriter. Read data from
   (unsigned-byte 8) stream data until EOF and compress it into
   "deflate"-format. Use file-write-date as the entry's date and time.
   Default to (file-write-date data), use 1980-01-01T00:00 if nil.

   Function ZIP (pathname source-directory &key if-exists)

   Compress all files in source-directory recursively into a new zip
   archive at pathname. Note that entry file names will not contain the
   name source-directory.

Bookmark

   [10]spec

References

   1. mailto:zip-devel@common-lisp.net
   2. http://common-lisp.net/cgi-bin/mailman/listinfo/zip-devel
   3. http://common-lisp.net/
   4. https://github.com/bluelisp/zip
   5. http://www.xach.com/lisp/salza2/
   6. http://www.weitz.de/flexi-streams/
   7. http://common-lisp.net/project/cl-plus-ssl/#trivial-gray-streams
   8. http://opensource.franz.com/deflate/
   9. http://www.xach.com/clhs.php?open
  10. http://www.pkware.com/company/standards/appnote/appnote.txt