Revision 88e21dc7461dca1ebc70d8579bcc9246364511ee authored by Shawn O. Pearce on 01 September 2007, 03:47:01 UTC, committed by Shawn O. Pearce on 01 September 2007, 03:47:01 UTC
Lately I have been doing a lot of calls to `git tag -d` and also to `git tag -v`. In both such cases being able to complete the names of existing tags saves the fingers some typing effort. We now look for the -d or -v option to git-tag in the bash completion support and offer up existing tag names as possible choices for these. When creating a new tag we now also offer bash completion support for the second argument to git-tag (the object to be tagged) as this can often be a specific existing branch name and is not necessarily the current HEAD. If the -f option is being used to recreate an existing tag we now also offer completion support on the existing tag names for the first argument of git-tag, helping to the user to reselect the prior tag name that they are trying to replace. Signed-off-by: Shawn O. Pearce <spearce@spearce.org>
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pack.h
#ifndef PACK_H
#define PACK_H
#include "object.h"
/*
* Packed object header
*/
#define PACK_SIGNATURE 0x5041434b /* "PACK" */
#define PACK_VERSION 2
#define pack_version_ok(v) ((v) == htonl(2) || (v) == htonl(3))
struct pack_header {
uint32_t hdr_signature;
uint32_t hdr_version;
uint32_t hdr_entries;
};
/*
* The first four bytes of index formats later than version 1 should
* start with this signature, as all older git binaries would find this
* value illegal and abort reading the file.
*
* This is the case because the number of objects in a packfile
* cannot exceed 1,431,660,000 as every object would need at least
* 3 bytes of data and the overall packfile cannot exceed 4 GiB with
* version 1 of the index file due to the offsets limited to 32 bits.
* Clearly the signature exceeds this maximum.
*
* Very old git binaries will also compare the first 4 bytes to the
* next 4 bytes in the index and abort with a "non-monotonic index"
* error if the second 4 byte word is smaller than the first 4
* byte word. This would be true in the proposed future index
* format as idx_signature would be greater than idx_version.
*/
#define PACK_IDX_SIGNATURE 0xff744f63 /* "\377tOc" */
/* These may be overridden by command-line parameters */
extern uint32_t pack_idx_default_version;
extern uint32_t pack_idx_off32_limit;
/*
* Packed object index header
*/
struct pack_idx_header {
uint32_t idx_signature;
uint32_t idx_version;
};
/*
* Common part of object structure used for write_idx_file
*/
struct pack_idx_entry {
unsigned char sha1[20];
uint32_t crc32;
off_t offset;
};
extern const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects, int nr_objects, unsigned char *sha1);
extern int verify_pack(struct packed_git *, int);
extern void fixup_pack_header_footer(int, unsigned char *, const char *, uint32_t);
#define PH_ERROR_EOF (-1)
#define PH_ERROR_PACK_SIGNATURE (-2)
#define PH_ERROR_PROTOCOL (-3)
extern int read_pack_header(int fd, struct pack_header *);
#endif
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