diff options
Diffstat (limited to 'diff-lib.c')
-rw-r--r-- | diff-lib.c | 223 |
1 files changed, 188 insertions, 35 deletions
@@ -1,18 +1,26 @@ /* * Copyright (C) 2005 Junio C Hamano */ -#include "cache.h" -#include "quote.h" +#include "git-compat-util.h" #include "commit.h" #include "diff.h" #include "diffcore.h" +#include "gettext.h" +#include "hash.h" +#include "hex.h" +#include "object-name.h" +#include "read-cache.h" #include "revision.h" #include "cache-tree.h" #include "unpack-trees.h" #include "refs.h" +#include "repository.h" #include "submodule.h" +#include "symlinks.h" +#include "trace.h" #include "dir.h" #include "fsmonitor.h" +#include "commit-reach.h" /* * diff-files @@ -29,11 +37,18 @@ */ static int check_removed(const struct cache_entry *ce, struct stat *st) { - if (lstat(ce->name, st) < 0) { + int stat_err; + + if (!(ce->ce_flags & CE_FSMONITOR_VALID)) + stat_err = lstat(ce->name, st); + else + stat_err = fake_lstat(ce, st); + if (stat_err < 0) { if (!is_missing_file_error(errno)) return -1; return 1; } + if (has_symlink_leading_path(ce->name, ce_namelen(ce))) return 1; if (S_ISDIR(st->st_mode)) { @@ -86,7 +101,7 @@ static int match_stat_with_submodule(struct diff_options *diffopt, return changed; } -int run_diff_files(struct rev_info *revs, unsigned int option) +void run_diff_files(struct rev_info *revs, unsigned int option) { int entries, i; int diff_unmerged_stage = revs->max_count; @@ -97,6 +112,8 @@ int run_diff_files(struct rev_info *revs, unsigned int option) diff_set_mnemonic_prefix(&revs->diffopt, "i/", "w/"); + refresh_fsmonitor(istate); + if (diff_unmerged_stage < 0) diff_unmerged_stage = 2; entries = istate->cache_nr; @@ -110,7 +127,20 @@ int run_diff_files(struct rev_info *revs, unsigned int option) if (diff_can_quit_early(&revs->diffopt)) break; - if (!ce_path_match(istate, ce, &revs->prune_data, NULL)) + /* + * NEEDSWORK: + * Here we filter with pathspec but the result is further + * filtered out when --relative is in effect. To end-users, + * a pathspec element that matched only to paths outside the + * current directory is like not matching anything at all; + * the handling of ps_matched[] here may become problematic + * if/when we add the "--error-unmatch" option to "git diff". + */ + if (!ce_path_match(istate, ce, &revs->prune_data, revs->ps_matched)) + continue; + + if (revs->diffopt.prefix && + strncmp(ce->name, revs->diffopt.prefix, revs->diffopt.prefix_length)) continue; if (ce_stage(ce)) { @@ -177,9 +207,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option) i--; if (revs->combine_merges && num_compare_stages == 2) { - show_combined_diff(dpath, 2, - revs->dense_combined_merges, - revs); + show_combined_diff(dpath, 2, revs); free(dpath); continue; } @@ -199,8 +227,17 @@ int run_diff_files(struct rev_info *revs, unsigned int option) if (ce_uptodate(ce) || ce_skip_worktree(ce)) continue; - /* If CE_VALID is set, don't look at workdir for file removal */ - if (ce->ce_flags & CE_VALID) { + /* + * When CE_VALID is set (via "update-index --assume-unchanged" + * or via adding paths while core.ignorestat is set to true), + * the user has promised that the working tree file for that + * path will not be modified. When CE_FSMONITOR_VALID is true, + * the fsmonitor knows that the path hasn't been modified since + * we refreshed the cached stat information. In either case, + * we do not have to stat to see if the path has been removed + * or modified. + */ + if (ce->ce_flags & (CE_VALID | CE_FSMONITOR_VALID)) { changed = 0; newmode = ce->ce_mode; } else { @@ -219,8 +256,9 @@ int run_diff_files(struct rev_info *revs, unsigned int option) continue; } else if (revs->diffopt.ita_invisible_in_index && ce_intent_to_add(ce)) { - diff_addremove(&revs->diffopt, '+', ce->ce_mode, - &null_oid, 0, ce->name, 0); + newmode = ce_mode_from_stat(ce, st.st_mode); + diff_addremove(&revs->diffopt, '+', newmode, + null_oid(), 0, ce->name, 0); continue; } @@ -237,7 +275,7 @@ int run_diff_files(struct rev_info *revs, unsigned int option) } oldmode = ce->ce_mode; old_oid = &ce->oid; - new_oid = changed ? &null_oid : &ce->oid; + new_oid = changed ? null_oid() : &ce->oid; diff_change(&revs->diffopt, oldmode, newmode, old_oid, new_oid, !is_null_oid(old_oid), @@ -248,7 +286,6 @@ int run_diff_files(struct rev_info *revs, unsigned int option) diffcore_std(&revs->diffopt); diff_flush(&revs->diffopt); trace_performance_since(start, "diff-files"); - return 0; } /* @@ -267,7 +304,8 @@ static void diff_index_show_file(struct rev_info *revs, oid, oid_valid, ce->name, dirty_submodule); } -static int get_stat_data(const struct cache_entry *ce, +static int get_stat_data(const struct index_state *istate, + const struct cache_entry *ce, const struct object_id **oidp, unsigned int *modep, int cached, int match_missing, @@ -294,7 +332,7 @@ static int get_stat_data(const struct cache_entry *ce, 0, dirty_submodule); if (changed) { mode = ce_mode_from_stat(ce, st.st_mode); - oid = &null_oid; + oid = null_oid(); } } @@ -310,12 +348,18 @@ static void show_new_file(struct rev_info *revs, const struct object_id *oid; unsigned int mode; unsigned dirty_submodule = 0; + struct index_state *istate = revs->diffopt.repo->index; + + if (new_file && S_ISSPARSEDIR(new_file->ce_mode)) { + diff_tree_oid(NULL, &new_file->oid, new_file->name, &revs->diffopt); + return; + } /* * New file in the index: it might actually be different in * the working tree. */ - if (get_stat_data(new_file, &oid, &mode, cached, match_missing, + if (get_stat_data(istate, new_file, &oid, &mode, cached, match_missing, &dirty_submodule, &revs->diffopt) < 0) return; @@ -331,8 +375,23 @@ static int show_modified(struct rev_info *revs, unsigned int mode, oldmode; const struct object_id *oid; unsigned dirty_submodule = 0; + struct index_state *istate = revs->diffopt.repo->index; - if (get_stat_data(new_entry, &oid, &mode, cached, match_missing, + assert(S_ISSPARSEDIR(old_entry->ce_mode) == + S_ISSPARSEDIR(new_entry->ce_mode)); + + /* + * If both are sparse directory entries, then expand the + * modifications to the file level. If only one was a sparse + * directory, then they appear as an add and delete instead of + * a modification. + */ + if (S_ISSPARSEDIR(new_entry->ce_mode)) { + diff_tree_oid(&old_entry->oid, &new_entry->oid, new_entry->name, &revs->diffopt); + return 0; + } + + if (get_stat_data(istate, new_entry, &oid, &mode, cached, match_missing, &dirty_submodule, &revs->diffopt) < 0) { if (report_missing) diff_index_show_file(revs, "-", old_entry, @@ -360,7 +419,7 @@ static int show_modified(struct rev_info *revs, p->parent[1].status = DIFF_STATUS_MODIFIED; p->parent[1].mode = old_entry->ce_mode; oidcpy(&p->parent[1].oid, &old_entry->oid); - show_combined_diff(p, 2, revs->dense_combined_merges, revs); + show_combined_diff(p, 2, revs); free(p); return 0; } @@ -404,14 +463,8 @@ static void do_oneway_diff(struct unpack_trees_options *o, /* if the entry is not checked out, don't examine work tree */ cached = o->index_only || (idx && ((idx->ce_flags & CE_VALID) || ce_skip_worktree(idx))); - /* - * Backward compatibility wart - "diff-index -m" does - * not mean "do not ignore merges", but "match_missing". - * - * But with the revision flag parsing, that's found in - * "!revs->ignore_merges". - */ - match_missing = !revs->ignore_merges; + + match_missing = revs->match_missing; if (cached && idx && ce_stage(idx)) { struct diff_filepair *pair; @@ -434,6 +487,11 @@ static void do_oneway_diff(struct unpack_trees_options *o, * Something removed from the tree? */ if (!idx) { + if (S_ISSPARSEDIR(tree->ce_mode)) { + diff_tree_oid(&tree->oid, NULL, tree->name, &revs->diffopt); + return; + } + diff_index_show_file(revs, "-", tree, &tree->oid, 1, tree->ce_mode, 0); return; @@ -513,20 +571,80 @@ static int diff_cache(struct rev_info *revs, opts.pathspec = &revs->diffopt.pathspec; opts.pathspec->recursive = 1; - init_tree_desc(&t, tree->buffer, tree->size); + init_tree_desc(&t, &tree->object.oid, tree->buffer, tree->size); return unpack_trees(1, &t, &opts); } -int run_diff_index(struct rev_info *revs, int cached) +void diff_get_merge_base(const struct rev_info *revs, struct object_id *mb) +{ + int i; + struct commit *mb_child[2] = {0}; + struct commit_list *merge_bases = NULL; + + for (i = 0; i < revs->pending.nr; i++) { + struct object *obj = revs->pending.objects[i].item; + if (obj->flags) + die(_("--merge-base does not work with ranges")); + } + + /* + * This check must go after the for loop above because A...B + * ranges produce three pending commits, resulting in a + * misleading error message. + */ + if (revs->pending.nr < 1 || revs->pending.nr > 2) + BUG("unexpected revs->pending.nr: %d", revs->pending.nr); + + for (i = 0; i < revs->pending.nr; i++) + mb_child[i] = lookup_commit_reference(the_repository, &revs->pending.objects[i].item->oid); + if (revs->pending.nr == 1) { + struct object_id oid; + + if (repo_get_oid(the_repository, "HEAD", &oid)) + die(_("unable to get HEAD")); + + mb_child[1] = lookup_commit_reference(the_repository, &oid); + } + + if (repo_get_merge_bases(the_repository, mb_child[0], mb_child[1], &merge_bases) < 0) + exit(128); + if (!merge_bases) + die(_("no merge base found")); + if (merge_bases->next) + die(_("multiple merge bases found")); + + oidcpy(mb, &merge_bases->item->object.oid); + + free_commit_list(merge_bases); +} + +void run_diff_index(struct rev_info *revs, unsigned int option) { struct object_array_entry *ent; + int cached = !!(option & DIFF_INDEX_CACHED); + int merge_base = !!(option & DIFF_INDEX_MERGE_BASE); + struct object_id oid; + const char *name; + char merge_base_hex[GIT_MAX_HEXSZ + 1]; + struct index_state *istate = revs->diffopt.repo->index; if (revs->pending.nr != 1) BUG("run_diff_index must be passed exactly one tree"); trace_performance_enter(); ent = revs->pending.objects; - if (diff_cache(revs, &ent->item->oid, ent->name, cached)) + + refresh_fsmonitor(istate); + + if (merge_base) { + diff_get_merge_base(revs, &oid); + name = oid_to_hex_r(merge_base_hex, &oid); + } else { + oidcpy(&oid, &ent->item->oid); + name = ent->name; + } + + if (diff_cache(revs, &oid, name, cached)) exit(128); diff_set_mnemonic_prefix(&revs->diffopt, "c/", cached ? "i/" : "w/"); @@ -534,7 +652,6 @@ int run_diff_index(struct rev_info *revs, int cached) diffcore_std(&revs->diffopt); diff_flush(&revs->diffopt); trace_performance_leave("diff-index"); - return 0; } int do_diff_cache(const struct object_id *tree_oid, struct diff_options *opt) @@ -543,10 +660,12 @@ int do_diff_cache(const struct object_id *tree_oid, struct diff_options *opt) repo_init_revisions(opt->repo, &revs, NULL); copy_pathspec(&revs.prune_data, &opt->pathspec); + diff_setup_done(&revs.diffopt); revs.diffopt = *opt; if (diff_cache(&revs, tree_oid, NULL, 1)) exit(128); + release_revisions(&revs); return 0; } @@ -556,6 +675,7 @@ int index_differs_from(struct repository *r, { struct rev_info rev; struct setup_revision_opt opt; + unsigned has_changes; repo_init_revisions(r, &rev, NULL); memset(&opt, 0, sizeof(opt)); @@ -563,10 +683,43 @@ int index_differs_from(struct repository *r, setup_revisions(0, NULL, &rev, &opt); rev.diffopt.flags.quick = 1; rev.diffopt.flags.exit_with_status = 1; - if (flags) + if (flags) { diff_flags_or(&rev.diffopt.flags, flags); + /* + * Now that flags are merged, honor override_submodule_config + * and ignore_submodules from passed flags. + */ + if (flags->override_submodule_config) + rev.diffopt.flags.ignore_submodules = flags->ignore_submodules; + } rev.diffopt.ita_invisible_in_index = ita_invisible_in_index; - run_diff_index(&rev, 1); - object_array_clear(&rev.pending); - return (rev.diffopt.flags.has_changes != 0); + run_diff_index(&rev, DIFF_INDEX_CACHED); + has_changes = rev.diffopt.flags.has_changes; + release_revisions(&rev); + return (has_changes != 0); +} + +static struct strbuf *idiff_prefix_cb(struct diff_options *opt UNUSED, void *data) +{ + return data; +} + +void show_interdiff(const struct object_id *oid1, const struct object_id *oid2, + int indent, struct diff_options *diffopt) +{ + struct diff_options opts; + struct strbuf prefix = STRBUF_INIT; + + memcpy(&opts, diffopt, sizeof(opts)); + opts.output_format = DIFF_FORMAT_PATCH; + opts.output_prefix = idiff_prefix_cb; + strbuf_addchars(&prefix, ' ', indent); + opts.output_prefix_data = &prefix; + diff_setup_done(&opts); + + diff_tree_oid(oid1, oid2, "", &opts); + diffcore_std(&opts); + diff_flush(&opts); + + strbuf_release(&prefix); } |