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archive: refactor list of archive formats

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Most of the tar and zip code was nicely split out into two
abstracted files which knew only about their specific
formats. The entry point to this code was a single "write
archive" function.

However, as these basic formats grow more complex (e.g., by
handling multiple file extensions and format names), a
static list of the entry point functions won't be enough.
Instead, let's provide a way for the tar and zip code to
tell the main archive code what they support by registering
archiver names and functions.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Jeff King
2011-06-21 21:23:33 -04:00
committed by Junio C Hamano
parent 40e7629194
commit 13e0f88d4a
4 changed files with 51 additions and 26 deletions
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17
archive.h
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@@ -14,16 +14,19 @@ struct archiver_args {
int compression_level;
};
typedef int (*write_archive_fn_t)(struct archiver_args *);
#define ARCHIVER_WANT_COMPRESSION_LEVELS 1
struct archiver {
const char *name;
int (*write_archive)(struct archiver_args *);
unsigned flags;
};
extern void register_archiver(struct archiver *);
extern void init_tar_archiver(void);
extern void init_zip_archiver(void);
typedef int (*write_archive_entry_fn_t)(struct archiver_args *args, const unsigned char *sha1, const char *path, size_t pathlen, unsigned int mode, void *buffer, unsigned long size);
/*
* Archive-format specific backends.
*/
extern int write_tar_archive(struct archiver_args *);
extern int write_zip_archive(struct archiver_args *);
extern int write_archive_entries(struct archiver_args *args, write_archive_entry_fn_t write_entry);
extern int write_archive(int argc, const char **argv, const char *prefix, int setup_prefix);