6973dcaee7
This is the first installment to libify diff brothers. The updated diff-files uses revision.c::setup_revisions() infrastructure to parse its command line arguments, which means the pathname arguments are checked more strictly than before. The tests are adjusted to separate possibly missing paths from the rest of arguments with double-dashes, to show the kosher way. As Linus pointed out, renaming diff.c to diff-lib.c was simply stupid, so I am renaming it back. The new diff-lib.c is to contain pieces extracted from diff brothers. Signed-off-by: Junio C Hamano <junkio@cox.net>
134 lines
3.0 KiB
C
134 lines
3.0 KiB
C
/*
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* Copyright (C) 2005 Junio C Hamano
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*/
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#include "cache.h"
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#include "quote.h"
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#include "commit.h"
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#include "diff.h"
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#include "diffcore.h"
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#include "revision.h"
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/*
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* diff-files
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*/
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int run_diff_files(struct rev_info *revs, int silent_on_removed)
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{
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int entries, i;
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int diff_unmerged_stage = revs->max_count;
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if (diff_unmerged_stage < 0)
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diff_unmerged_stage = 2;
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entries = read_cache();
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if (entries < 0) {
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perror("read_cache");
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return -1;
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}
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for (i = 0; i < entries; i++) {
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struct stat st;
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unsigned int oldmode, newmode;
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struct cache_entry *ce = active_cache[i];
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int changed;
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if (!ce_path_match(ce, revs->prune_data))
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continue;
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if (ce_stage(ce)) {
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struct {
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struct combine_diff_path p;
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struct combine_diff_parent filler[5];
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} combine;
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int num_compare_stages = 0;
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combine.p.next = NULL;
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combine.p.len = ce_namelen(ce);
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combine.p.path = xmalloc(combine.p.len + 1);
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memcpy(combine.p.path, ce->name, combine.p.len);
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combine.p.path[combine.p.len] = 0;
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combine.p.mode = 0;
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memset(combine.p.sha1, 0, 20);
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memset(&combine.p.parent[0], 0,
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sizeof(combine.filler));
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while (i < entries) {
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struct cache_entry *nce = active_cache[i];
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int stage;
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if (strcmp(ce->name, nce->name))
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break;
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/* Stage #2 (ours) is the first parent,
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* stage #3 (theirs) is the second.
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*/
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stage = ce_stage(nce);
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if (2 <= stage) {
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int mode = ntohl(nce->ce_mode);
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num_compare_stages++;
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memcpy(combine.p.parent[stage-2].sha1,
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nce->sha1, 20);
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combine.p.parent[stage-2].mode =
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canon_mode(mode);
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combine.p.parent[stage-2].status =
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DIFF_STATUS_MODIFIED;
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}
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/* diff against the proper unmerged stage */
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if (stage == diff_unmerged_stage)
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ce = nce;
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i++;
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}
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/*
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* Compensate for loop update
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*/
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i--;
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if (revs->combine_merges && num_compare_stages == 2) {
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show_combined_diff(&combine.p, 2,
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revs->dense_combined_merges,
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revs);
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free(combine.p.path);
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continue;
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}
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free(combine.p.path);
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/*
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* Show the diff for the 'ce' if we found the one
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* from the desired stage.
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*/
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diff_unmerge(&revs->diffopt, ce->name);
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if (ce_stage(ce) != diff_unmerged_stage)
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continue;
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}
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if (lstat(ce->name, &st) < 0) {
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if (errno != ENOENT && errno != ENOTDIR) {
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perror(ce->name);
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continue;
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}
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if (silent_on_removed)
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continue;
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diff_addremove(&revs->diffopt, '-', ntohl(ce->ce_mode),
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ce->sha1, ce->name, NULL);
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continue;
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}
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changed = ce_match_stat(ce, &st, 0);
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if (!changed && !revs->diffopt.find_copies_harder)
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continue;
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oldmode = ntohl(ce->ce_mode);
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newmode = canon_mode(st.st_mode);
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if (!trust_executable_bit &&
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S_ISREG(newmode) && S_ISREG(oldmode) &&
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((newmode ^ oldmode) == 0111))
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newmode = oldmode;
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diff_change(&revs->diffopt, oldmode, newmode,
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ce->sha1, (changed ? null_sha1 : ce->sha1),
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ce->name, NULL);
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}
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diffcore_std(&revs->diffopt);
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diff_flush(&revs->diffopt);
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return 0;
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}
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