2018-05-28 09:38:53 +00:00
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#include "builtin.h"
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2005-07-06 00:08:02 +00:00
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#include "cache.h"
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2007-04-09 05:06:36 +00:00
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#include "pack.h"
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2005-07-06 00:08:02 +00:00
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2009-11-09 15:04:55 +00:00
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static const char show_index_usage[] =
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usage: do not insist that standard input must come from a file
The synopsys text and the usage string of subcommands that read list
of things from the standard input are often shown like this:
git gostak [--distim] < <list-of-doshes>
This is problematic in a number of ways:
* The way to use these commands is more often to feed them the
output from another command, not feed them from a file.
* Manual pages outside Git, commands that operate on the data read
from the standard input, e.g "sort", "grep", "sed", etc., are not
described with such a "< redirection-from-file" in their synopsys
text. Our doing so introduces inconsistency.
* We do not insist on where the output should go, by saying
git gostak [--distim] < <list-of-doshes> > <output>
* As it is our convention to enclose placeholders inside <braket>,
the redirection operator followed by a placeholder filename
becomes very hard to read, both in the documentation and in the
help text.
Let's clean them all up, after making sure that the documentation
clearly describes the modes that take information from the standard
input and what kind of things are expected on the input.
[jc: stole example for fmt-merge-msg from Jonathan]
Helped-by: Jonathan Nieder <jrnieder@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2015-10-16 18:27:42 +00:00
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"git show-index";
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2009-11-09 15:04:55 +00:00
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2018-05-28 09:38:53 +00:00
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int cmd_show_index(int argc, const char **argv, const char *prefix)
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2005-07-06 00:08:02 +00:00
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{
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int i;
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unsigned nr;
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2007-04-09 05:06:36 +00:00
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unsigned int version;
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2005-07-06 00:08:02 +00:00
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static unsigned int top_index[256];
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2019-08-18 20:04:09 +00:00
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const unsigned hashsz = the_hash_algo->rawsz;
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2005-07-06 00:08:02 +00:00
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2009-11-09 15:04:55 +00:00
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if (argc != 1)
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usage(show_index_usage);
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2007-04-09 05:06:36 +00:00
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if (fread(top_index, 2 * 4, 1, stdin) != 1)
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die("unable to read header");
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if (top_index[0] == htonl(PACK_IDX_SIGNATURE)) {
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version = ntohl(top_index[1]);
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if (version < 2 || version > 2)
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die("unknown index version");
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if (fread(top_index, 256 * 4, 1, stdin) != 1)
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die("unable to read index");
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} else {
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version = 1;
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if (fread(&top_index[2], 254 * 4, 1, stdin) != 1)
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die("unable to read index");
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}
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2005-07-06 00:08:02 +00:00
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nr = 0;
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for (i = 0; i < 256; i++) {
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unsigned n = ntohl(top_index[i]);
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if (n < nr)
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die("corrupt index file");
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nr = n;
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}
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2007-04-09 05:06:36 +00:00
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if (version == 1) {
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for (i = 0; i < nr; i++) {
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2019-08-18 20:04:09 +00:00
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unsigned int offset, entry[(GIT_MAX_RAWSZ + 4) / sizeof(unsigned int)];
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2005-07-06 00:08:02 +00:00
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2019-08-18 20:04:09 +00:00
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if (fread(entry, 4 + hashsz, 1, stdin) != 1)
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2007-04-09 05:06:36 +00:00
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die("unable to read entry %u/%u", i, nr);
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offset = ntohl(entry[0]);
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printf("%u %s\n", offset, sha1_to_hex((void *)(entry+1)));
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}
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} else {
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unsigned off64_nr = 0;
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struct {
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2019-08-18 20:04:09 +00:00
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struct object_id oid;
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2007-04-09 05:06:36 +00:00
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uint32_t crc;
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uint32_t off;
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2016-02-22 22:44:25 +00:00
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} *entries;
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ALLOC_ARRAY(entries, nr);
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2007-04-09 05:06:36 +00:00
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for (i = 0; i < nr; i++)
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2019-08-18 20:04:09 +00:00
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if (fread(entries[i].oid.hash, hashsz, 1, stdin) != 1)
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2007-04-09 05:06:36 +00:00
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die("unable to read sha1 %u/%u", i, nr);
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for (i = 0; i < nr; i++)
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if (fread(&entries[i].crc, 4, 1, stdin) != 1)
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die("unable to read crc %u/%u", i, nr);
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for (i = 0; i < nr; i++)
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if (fread(&entries[i].off, 4, 1, stdin) != 1)
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die("unable to read 32b offset %u/%u", i, nr);
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for (i = 0; i < nr; i++) {
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uint64_t offset;
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uint32_t off = ntohl(entries[i].off);
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if (!(off & 0x80000000)) {
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offset = off;
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} else {
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uint32_t off64[2];
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if ((off & 0x7fffffff) != off64_nr)
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die("inconsistent 64b offset index");
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if (fread(off64, 8, 1, stdin) != 1)
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die("unable to read 64b offset %u", off64_nr);
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offset = (((uint64_t)ntohl(off64[0])) << 32) |
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ntohl(off64[1]);
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off64_nr++;
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}
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2008-07-03 15:52:09 +00:00
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printf("%" PRIuMAX " %s (%08"PRIx32")\n",
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(uintmax_t) offset,
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2019-08-18 20:04:09 +00:00
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oid_to_hex(&entries[i].oid),
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2007-04-09 05:06:36 +00:00
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ntohl(entries[i].crc));
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}
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free(entries);
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2005-07-06 00:08:02 +00:00
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}
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return 0;
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}
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