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https://github.com/git/git.git
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671c9b7e31
This can do the lstat() storm in parallel, giving potentially much improved performance for cold-cache cases or things like NFS that have weak metadata caching. Just use "read_cache_preload()" instead of "read_cache()" to force an optimistic preload of the index stat data. The function takes a pathspec as its argument, allowing us to preload only the relevant portion of the index. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Junio C Hamano <gitster@pobox.com>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
/*
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* GIT - The information manager from hell
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*
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* Copyright (C) Linus Torvalds, 2005
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*/
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#include "cache.h"
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#include "diff.h"
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#include "commit.h"
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#include "revision.h"
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#include "builtin.h"
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static const char diff_files_usage[] =
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"git diff-files [-q] [-0/-1/2/3 |-c|--cc] [<common diff options>] [<path>...]"
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COMMON_DIFF_OPTIONS_HELP;
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int cmd_diff_files(int argc, const char **argv, const char *prefix)
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{
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struct rev_info rev;
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int result;
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unsigned options = 0;
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init_revisions(&rev, prefix);
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git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
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rev.abbrev = 0;
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argc = setup_revisions(argc, argv, &rev, NULL);
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while (1 < argc && argv[1][0] == '-') {
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if (!strcmp(argv[1], "--base"))
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rev.max_count = 1;
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else if (!strcmp(argv[1], "--ours"))
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rev.max_count = 2;
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else if (!strcmp(argv[1], "--theirs"))
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rev.max_count = 3;
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else if (!strcmp(argv[1], "-q"))
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options |= DIFF_SILENT_ON_REMOVED;
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else
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usage(diff_files_usage);
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argv++; argc--;
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}
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if (!rev.diffopt.output_format)
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rev.diffopt.output_format = DIFF_FORMAT_RAW;
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/*
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* Make sure there are NO revision (i.e. pending object) parameter,
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* rev.max_count is reasonable (0 <= n <= 3), and
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* there is no other revision filtering parameters.
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*/
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if (rev.pending.nr ||
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rev.min_age != -1 || rev.max_age != -1 ||
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3 < rev.max_count)
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usage(diff_files_usage);
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/*
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* "diff-files --base -p" should not combine merges because it
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* was not asked to. "diff-files -c -p" should not densify
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* (the user should ask with "diff-files --cc" explicitly).
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*/
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if (rev.max_count == -1 && !rev.combine_merges &&
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(rev.diffopt.output_format & DIFF_FORMAT_PATCH))
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rev.combine_merges = rev.dense_combined_merges = 1;
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if (read_cache_preload(rev.diffopt.paths) < 0) {
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perror("read_cache_preload");
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return -1;
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}
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result = run_diff_files(&rev, options);
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return diff_result_code(&rev.diffopt, result);
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}
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