From: Junio C Hamano Date: Tue, 30 Nov 2010 01:52:35 +0000 (-0800) Subject: Merge branch 'en/merge-recursive' X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=5acb623b72bde9ec96c48a8bb8f50e61371705ee;hp=106e3afa6f2d54ea520f9f156abca34913ae4968;p=git.git Merge branch 'en/merge-recursive' * en/merge-recursive: (41 commits) t6022: Use -eq not = to test output of wc -l merge-recursive:make_room_for_directories - work around dumb compilers merge-recursive: Remove redundant path clearing for D/F conflicts merge-recursive: Make room for directories in D/F conflicts handle_delete_modify(): Check whether D/F conflicts are still present merge_content(): Check whether D/F conflicts are still present conflict_rename_rename_1to2(): Fix checks for presence of D/F conflicts conflict_rename_delete(): Check whether D/F conflicts are still present merge-recursive: Delay modify/delete conflicts if D/F conflict present merge-recursive: Delay content merging for renames merge-recursive: Delay handling of rename/delete conflicts merge-recursive: Move handling of double rename of one file to other file merge-recursive: Move handling of double rename of one file to two merge-recursive: Avoid doubly merging rename/add conflict contents merge-recursive: Update merge_content() call signature merge-recursive: Update conflict_rename_rename_1to2() call signature merge-recursive: Structure process_df_entry() to handle more cases merge-recursive: Have process_entry() skip D/F or rename entries merge-recursive: New function to assist resolving renames in-core only merge-recursive: New data structures for deferring of D/F conflicts ... Conflicts: t/t6020-merge-df.sh t/t6036-recursive-corner-cases.sh --- diff --git a/merge-recursive.c b/merge-recursive.c index 875859f68..16c2dbeab 100644 --- a/merge-recursive.c +++ b/merge-recursive.c @@ -63,6 +63,22 @@ static int sha_eq(const unsigned char *a, const unsigned char *b) return a && b && hashcmp(a, b) == 0; } +enum rename_type { + RENAME_NORMAL = 0, + RENAME_DELETE, + RENAME_ONE_FILE_TO_TWO +}; + +struct rename_df_conflict_info { + enum rename_type rename_type; + struct diff_filepair *pair1; + struct diff_filepair *pair2; + const char *branch1; + const char *branch2; + struct stage_data *dst_entry1; + struct stage_data *dst_entry2; +}; + /* * Since we want to write the index eventually, we cannot reuse the index * for these (temporary) data. @@ -74,9 +90,37 @@ struct stage_data unsigned mode; unsigned char sha[20]; } stages[4]; + struct rename_df_conflict_info *rename_df_conflict_info; unsigned processed:1; }; +static inline void setup_rename_df_conflict_info(enum rename_type rename_type, + struct diff_filepair *pair1, + struct diff_filepair *pair2, + const char *branch1, + const char *branch2, + struct stage_data *dst_entry1, + struct stage_data *dst_entry2) +{ + struct rename_df_conflict_info *ci = xcalloc(1, sizeof(struct rename_df_conflict_info)); + ci->rename_type = rename_type; + ci->pair1 = pair1; + ci->branch1 = branch1; + ci->branch2 = branch2; + + ci->dst_entry1 = dst_entry1; + dst_entry1->rename_df_conflict_info = ci; + dst_entry1->processed = 0; + + assert(!pair2 == !dst_entry2); + if (dst_entry2) { + ci->dst_entry2 = dst_entry2; + ci->pair2 = pair2; + dst_entry2->rename_df_conflict_info = ci; + dst_entry2->processed = 0; + } +} + static int show(struct merge_options *o, int v) { return (!o->call_depth && o->verbosity >= v) || o->verbosity >= 5; @@ -302,6 +346,63 @@ static struct string_list *get_unmerged(void) return unmerged; } +static void make_room_for_directories_of_df_conflicts(struct merge_options *o, + struct string_list *entries) +{ + /* If there are D/F conflicts, and the paths currently exist + * in the working copy as a file, we want to remove them to + * make room for the corresponding directory. Such paths will + * later be processed in process_df_entry() at the end. If + * the corresponding directory ends up being removed by the + * merge, then the file will be reinstated at that time; + * otherwise, if the file is not supposed to be removed by the + * merge, the contents of the file will be placed in another + * unique filename. + * + * NOTE: This function relies on the fact that entries for a + * D/F conflict will appear adjacent in the index, with the + * entries for the file appearing before entries for paths + * below the corresponding directory. + */ + const char *last_file = NULL; + int last_len = 0; + struct stage_data *last_e; + int i; + + for (i = 0; i < entries->nr; i++) { + const char *path = entries->items[i].string; + int len = strlen(path); + struct stage_data *e = entries->items[i].util; + + /* + * Check if last_file & path correspond to a D/F conflict; + * i.e. whether path is last_file+'/'+. + * If so, remove last_file to make room for path and friends. + */ + if (last_file && + len > last_len && + memcmp(path, last_file, last_len) == 0 && + path[last_len] == '/') { + output(o, 3, "Removing %s to make room for subdirectory; may re-add later.", last_file); + unlink(last_file); + } + + /* + * Determine whether path could exist as a file in the + * working directory as a possible D/F conflict. This + * will only occur when it exists in stage 2 as a + * file. + */ + if (S_ISREG(e->stages[2].mode) || S_ISLNK(e->stages[2].mode)) { + last_file = path; + last_len = len; + last_e = e; + } else { + last_file = NULL; + } + } +} + struct rename { struct diff_filepair *pair; @@ -374,11 +475,10 @@ static struct string_list *get_renames(struct merge_options *o, return renames; } -static int update_stages(const char *path, struct diff_filespec *o, +static int update_stages_options(const char *path, struct diff_filespec *o, struct diff_filespec *a, struct diff_filespec *b, - int clear) + int clear, int options) { - int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE; if (clear) if (remove_file_from_cache(path)) return -1; @@ -394,6 +494,34 @@ static int update_stages(const char *path, struct diff_filespec *o, return 0; } +static int update_stages(const char *path, struct diff_filespec *o, + struct diff_filespec *a, struct diff_filespec *b, + int clear) +{ + int options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_OK_TO_REPLACE; + return update_stages_options(path, o, a, b, clear, options); +} + +static int update_stages_and_entry(const char *path, + struct stage_data *entry, + struct diff_filespec *o, + struct diff_filespec *a, + struct diff_filespec *b, + int clear) +{ + int options; + + entry->processed = 0; + entry->stages[1].mode = o->mode; + entry->stages[2].mode = a->mode; + entry->stages[3].mode = b->mode; + hashcpy(entry->stages[1].sha, o->sha1); + hashcpy(entry->stages[2].sha, a->sha1); + hashcpy(entry->stages[3].sha, b->sha1); + options = ADD_CACHE_OK_TO_ADD | ADD_CACHE_SKIP_DFCHECK; + return update_stages_options(path, o, a, b, clear, options); +} + static int remove_file(struct merge_options *o, int clean, const char *path, int no_wd) { @@ -732,29 +860,56 @@ static struct merge_file_info merge_file(struct merge_options *o, return result; } -static void conflict_rename_rename(struct merge_options *o, - struct rename *ren1, - const char *branch1, - struct rename *ren2, - const char *branch2) +static void conflict_rename_delete(struct merge_options *o, + struct diff_filepair *pair, + const char *rename_branch, + const char *other_branch) +{ + char *dest_name = pair->two->path; + int df_conflict = 0; + struct stat st; + + output(o, 1, "CONFLICT (rename/delete): Rename %s->%s in %s " + "and deleted in %s", + pair->one->path, pair->two->path, rename_branch, + other_branch); + if (!o->call_depth) + update_stages(dest_name, NULL, + rename_branch == o->branch1 ? pair->two : NULL, + rename_branch == o->branch1 ? NULL : pair->two, + 1); + if (lstat(dest_name, &st) == 0 && S_ISDIR(st.st_mode)) { + dest_name = unique_path(o, dest_name, rename_branch); + df_conflict = 1; + } + update_file(o, 0, pair->two->sha1, pair->two->mode, dest_name); + if (df_conflict) + free(dest_name); +} + +static void conflict_rename_rename_1to2(struct merge_options *o, + struct diff_filepair *pair1, + const char *branch1, + struct diff_filepair *pair2, + const char *branch2) { + /* One file was renamed in both branches, but to different names. */ char *del[2]; int delp = 0; - const char *ren1_dst = ren1->pair->two->path; - const char *ren2_dst = ren2->pair->two->path; + const char *ren1_dst = pair1->two->path; + const char *ren2_dst = pair2->two->path; const char *dst_name1 = ren1_dst; const char *dst_name2 = ren2_dst; - if (string_list_has_string(&o->current_directory_set, ren1_dst)) { + struct stat st; + if (lstat(ren1_dst, &st) == 0 && S_ISDIR(st.st_mode)) { dst_name1 = del[delp++] = unique_path(o, ren1_dst, branch1); output(o, 1, "%s is a directory in %s adding as %s instead", ren1_dst, branch2, dst_name1); - remove_file(o, 0, ren1_dst, 0); } - if (string_list_has_string(&o->current_directory_set, ren2_dst)) { + if (lstat(ren2_dst, &st) == 0 && S_ISDIR(st.st_mode)) { dst_name2 = del[delp++] = unique_path(o, ren2_dst, branch2); output(o, 1, "%s is a directory in %s adding as %s instead", ren2_dst, branch1, dst_name2); - remove_file(o, 0, ren2_dst, 0); } if (o->call_depth) { remove_file_from_cache(dst_name1); @@ -762,34 +917,27 @@ static void conflict_rename_rename(struct merge_options *o, /* * Uncomment to leave the conflicting names in the resulting tree * - * update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, dst_name1); - * update_file(o, 0, ren2->pair->two->sha1, ren2->pair->two->mode, dst_name2); + * update_file(o, 0, pair1->two->sha1, pair1->two->mode, dst_name1); + * update_file(o, 0, pair2->two->sha1, pair2->two->mode, dst_name2); */ } else { - update_stages(dst_name1, NULL, ren1->pair->two, NULL, 1); - update_stages(dst_name2, NULL, NULL, ren2->pair->two, 1); + update_stages(ren1_dst, NULL, pair1->two, NULL, 1); + update_stages(ren2_dst, NULL, NULL, pair2->two, 1); + + update_file(o, 0, pair1->two->sha1, pair1->two->mode, dst_name1); + update_file(o, 0, pair2->two->sha1, pair2->two->mode, dst_name2); } while (delp--) free(del[delp]); } -static void conflict_rename_dir(struct merge_options *o, - struct rename *ren1, - const char *branch1) -{ - char *new_path = unique_path(o, ren1->pair->two->path, branch1); - output(o, 1, "Renaming %s to %s instead", ren1->pair->one->path, new_path); - remove_file(o, 0, ren1->pair->two->path, 0); - update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, new_path); - free(new_path); -} - -static void conflict_rename_rename_2(struct merge_options *o, - struct rename *ren1, - const char *branch1, - struct rename *ren2, - const char *branch2) +static void conflict_rename_rename_2to1(struct merge_options *o, + struct rename *ren1, + const char *branch1, + struct rename *ren2, + const char *branch2) { + /* Two files were renamed to the same thing. */ char *new_path1 = unique_path(o, ren1->pair->two->path, branch1); char *new_path2 = unique_path(o, ren2->pair->two->path, branch2); output(o, 1, "Renaming %s to %s and %s to %s instead", @@ -879,84 +1027,60 @@ static int process_renames(struct merge_options *o, ren2->dst_entry->processed = 1; ren2->processed = 1; if (strcmp(ren1_dst, ren2_dst) != 0) { - clean_merge = 0; - output(o, 1, "CONFLICT (rename/rename): " - "Rename \"%s\"->\"%s\" in branch \"%s\" " - "rename \"%s\"->\"%s\" in \"%s\"%s", - src, ren1_dst, branch1, - src, ren2_dst, branch2, - o->call_depth ? " (left unresolved)": ""); - if (o->call_depth) { - remove_file_from_cache(src); - update_file(o, 0, ren1->pair->one->sha1, - ren1->pair->one->mode, src); - } - conflict_rename_rename(o, ren1, branch1, ren2, branch2); + setup_rename_df_conflict_info(RENAME_ONE_FILE_TO_TWO, + ren1->pair, + ren2->pair, + branch1, + branch2, + ren1->dst_entry, + ren2->dst_entry); } else { - struct merge_file_info mfi; remove_file(o, 1, ren1_src, 1); - mfi = merge_file(o, - ren1->pair->one, - ren1->pair->two, - ren2->pair->two, - branch1, - branch2); - if (mfi.merge || !mfi.clean) - output(o, 1, "Renaming %s->%s", src, ren1_dst); - - if (mfi.merge) - output(o, 2, "Auto-merging %s", ren1_dst); - - if (!mfi.clean) { - output(o, 1, "CONFLICT (content): merge conflict in %s", - ren1_dst); - clean_merge = 0; - - if (!o->call_depth) - update_stages(ren1_dst, - ren1->pair->one, - ren1->pair->two, - ren2->pair->two, - 1 /* clear */); - } - update_file(o, mfi.clean, mfi.sha, mfi.mode, ren1_dst); + update_stages_and_entry(ren1_dst, + ren1->dst_entry, + ren1->pair->one, + ren1->pair->two, + ren2->pair->two, + 1 /* clear */); } } else { /* Renamed in 1, maybe changed in 2 */ struct string_list_item *item; /* we only use sha1 and mode of these */ struct diff_filespec src_other, dst_other; - int try_merge, stage = a_renames == renames1 ? 3: 2; + int try_merge; - remove_file(o, 1, ren1_src, o->call_depth || stage == 3); + /* + * unpack_trees loads entries from common-commit + * into stage 1, from head-commit into stage 2, and + * from merge-commit into stage 3. We keep track + * of which side corresponds to the rename. + */ + int renamed_stage = a_renames == renames1 ? 2 : 3; + int other_stage = a_renames == renames1 ? 3 : 2; - hashcpy(src_other.sha1, ren1->src_entry->stages[stage].sha); - src_other.mode = ren1->src_entry->stages[stage].mode; - hashcpy(dst_other.sha1, ren1->dst_entry->stages[stage].sha); - dst_other.mode = ren1->dst_entry->stages[stage].mode; + remove_file(o, 1, ren1_src, o->call_depth || renamed_stage == 2); + hashcpy(src_other.sha1, ren1->src_entry->stages[other_stage].sha); + src_other.mode = ren1->src_entry->stages[other_stage].mode; + hashcpy(dst_other.sha1, ren1->dst_entry->stages[other_stage].sha); + dst_other.mode = ren1->dst_entry->stages[other_stage].mode; try_merge = 0; - if (string_list_has_string(&o->current_directory_set, ren1_dst)) { - clean_merge = 0; - output(o, 1, "CONFLICT (rename/directory): Rename %s->%s in %s " - " directory %s added in %s", - ren1_src, ren1_dst, branch1, - ren1_dst, branch2); - conflict_rename_dir(o, ren1, branch1); - } else if (sha_eq(src_other.sha1, null_sha1)) { - clean_merge = 0; - output(o, 1, "CONFLICT (rename/delete): Rename %s->%s in %s " - "and deleted in %s", - ren1_src, ren1_dst, branch1, - branch2); - update_file(o, 0, ren1->pair->two->sha1, ren1->pair->two->mode, ren1_dst); - if (!o->call_depth) - update_stages(ren1_dst, NULL, - branch1 == o->branch1 ? - ren1->pair->two : NULL, - branch1 == o->branch1 ? - NULL : ren1->pair->two, 1); + if (sha_eq(src_other.sha1, null_sha1)) { + if (string_list_has_string(&o->current_directory_set, ren1_dst)) { + ren1->dst_entry->processed = 0; + setup_rename_df_conflict_info(RENAME_DELETE, + ren1->pair, + NULL, + branch1, + branch2, + ren1->dst_entry, + NULL); + } else { + clean_merge = 0; + conflict_rename_delete(o, ren1->pair, branch1, branch2); + } } else if ((dst_other.mode == ren1->pair->two->mode) && sha_eq(dst_other.sha1, ren1->pair->two->sha1)) { /* Added file on the other side @@ -991,6 +1115,7 @@ static int process_renames(struct merge_options *o, mfi.sha, mfi.mode, ren1_dst); + try_merge = 0; } else { new_path = unique_path(o, ren1_dst, branch2); output(o, 1, "Adding as %s instead", new_path); @@ -1005,13 +1130,12 @@ static int process_renames(struct merge_options *o, "Rename %s->%s in %s", ren1_src, ren1_dst, branch1, ren2->pair->one->path, ren2->pair->two->path, branch2); - conflict_rename_rename_2(o, ren1, branch1, ren2, branch2); + conflict_rename_rename_2to1(o, ren1, branch1, ren2, branch2); } else try_merge = 1; if (try_merge) { struct diff_filespec *one, *a, *b; - struct merge_file_info mfi; src_other.path = (char *)ren1_src; one = ren1->pair->one; @@ -1022,41 +1146,15 @@ static int process_renames(struct merge_options *o, b = ren1->pair->two; a = &src_other; } - mfi = merge_file(o, one, a, b, - o->branch1, o->branch2); - - if (mfi.clean && - sha_eq(mfi.sha, ren1->pair->two->sha1) && - mfi.mode == ren1->pair->two->mode) { - /* - * This message is part of - * t6022 test. If you change - * it update the test too. - */ - output(o, 3, "Skipped %s (merged same as existing)", ren1_dst); - - /* There may be higher stage entries left - * in the index (e.g. due to a D/F - * conflict) that need to be resolved. - */ - if (!ren1->dst_entry->stages[2].mode != - !ren1->dst_entry->stages[3].mode) - ren1->dst_entry->processed = 0; - } else { - if (mfi.merge || !mfi.clean) - output(o, 1, "Renaming %s => %s", ren1_src, ren1_dst); - if (mfi.merge) - output(o, 2, "Auto-merging %s", ren1_dst); - if (!mfi.clean) { - output(o, 1, "CONFLICT (rename/modify): Merge conflict in %s", - ren1_dst); - clean_merge = 0; - - if (!o->call_depth) - update_stages(ren1_dst, - one, a, b, 1); - } - update_file(o, mfi.clean, mfi.sha, mfi.mode, ren1_dst); + update_stages_and_entry(ren1_dst, ren1->dst_entry, one, a, b, 1); + if (string_list_has_string(&o->current_directory_set, ren1_dst)) { + setup_rename_df_conflict_info(RENAME_NORMAL, + ren1->pair, + NULL, + branch1, + NULL, + ren1->dst_entry, + NULL); } } } @@ -1119,6 +1217,90 @@ error_return: return ret; } +static void handle_delete_modify(struct merge_options *o, + const char *path, + const char *new_path, + unsigned char *a_sha, int a_mode, + unsigned char *b_sha, int b_mode) +{ + if (!a_sha) { + output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " + "and modified in %s. Version %s of %s left in tree%s%s.", + path, o->branch1, + o->branch2, o->branch2, path, + path == new_path ? "" : " at ", + path == new_path ? "" : new_path); + update_file(o, 0, b_sha, b_mode, new_path); + } else { + output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " + "and modified in %s. Version %s of %s left in tree%s%s.", + path, o->branch2, + o->branch1, o->branch1, path, + path == new_path ? "" : " at ", + path == new_path ? "" : new_path); + update_file(o, 0, a_sha, a_mode, new_path); + } +} + +static int merge_content(struct merge_options *o, + const char *path, + unsigned char *o_sha, int o_mode, + unsigned char *a_sha, int a_mode, + unsigned char *b_sha, int b_mode, + const char *df_rename_conflict_branch) +{ + const char *reason = "content"; + struct merge_file_info mfi; + struct diff_filespec one, a, b; + struct stat st; + unsigned df_conflict_remains = 0; + + if (!o_sha) { + reason = "add/add"; + o_sha = (unsigned char *)null_sha1; + } + one.path = a.path = b.path = (char *)path; + hashcpy(one.sha1, o_sha); + one.mode = o_mode; + hashcpy(a.sha1, a_sha); + a.mode = a_mode; + hashcpy(b.sha1, b_sha); + b.mode = b_mode; + + mfi = merge_file(o, &one, &a, &b, o->branch1, o->branch2); + if (df_rename_conflict_branch && + lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) { + df_conflict_remains = 1; + } + + if (mfi.clean && !df_conflict_remains && + sha_eq(mfi.sha, a_sha) && mfi.mode == a.mode) + output(o, 3, "Skipped %s (merged same as existing)", path); + else + output(o, 2, "Auto-merging %s", path); + + if (!mfi.clean) { + if (S_ISGITLINK(mfi.mode)) + reason = "submodule"; + output(o, 1, "CONFLICT (%s): Merge conflict in %s", + reason, path); + } + + if (df_conflict_remains) { + const char *new_path; + update_file_flags(o, mfi.sha, mfi.mode, path, + o->call_depth || mfi.clean, 0); + new_path = unique_path(o, path, df_rename_conflict_branch); + mfi.clean = 0; + output(o, 1, "Adding as %s instead", new_path); + update_file_flags(o, mfi.sha, mfi.mode, new_path, 0, 1); + } else { + update_file(o, mfi.clean, mfi.sha, mfi.mode, path); + } + return mfi.clean; + +} + /* Per entry merge function */ static int process_entry(struct merge_options *o, const char *path, struct stage_data *entry) @@ -1136,6 +1318,9 @@ static int process_entry(struct merge_options *o, unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode); unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode); + if (entry->rename_df_conflict_info) + return 1; /* Such cases are handled elsewhere. */ + entry->processed = 1; if (o_sha && (!a_sha || !b_sha)) { /* Case A: Deleted in one */ @@ -1148,22 +1333,15 @@ static int process_entry(struct merge_options *o, output(o, 2, "Removing %s", path); /* do not touch working file if it did not exist */ remove_file(o, 1, path, !a_sha); + } else if (string_list_has_string(&o->current_directory_set, + path)) { + entry->processed = 0; + return 1; /* Assume clean until processed */ } else { /* Deleted in one and changed in the other */ clean_merge = 0; - if (!a_sha) { - output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " - "and modified in %s. Version %s of %s left in tree.", - path, o->branch1, - o->branch2, o->branch2, path); - update_file(o, 0, b_sha, b_mode, path); - } else { - output(o, 1, "CONFLICT (delete/modify): %s deleted in %s " - "and modified in %s. Version %s of %s left in tree.", - path, o->branch2, - o->branch1, o->branch1, path); - update_file(o, 0, a_sha, a_mode, path); - } + handle_delete_modify(o, path, path, + a_sha, a_mode, b_sha, b_mode); } } else if ((!o_sha && a_sha && !b_sha) || @@ -1182,15 +1360,7 @@ static int process_entry(struct merge_options *o, if (string_list_has_string(&o->current_directory_set, path)) { /* Handle D->F conflicts after all subfiles */ entry->processed = 0; - /* But get any file out of the way now, so conflicted - * entries below the directory of the same name can - * be put in the working directory. - */ - if (a_sha) - output(o, 2, "Removing %s", path); - /* do not touch working file if it did not exist */ - remove_file(o, 0, path, !a_sha); - return 1; /* Assume clean till processed */ + return 1; /* Assume clean until processed */ } else { output(o, 2, "Adding %s", path); update_file(o, 1, sha, mode, path); @@ -1198,34 +1368,9 @@ static int process_entry(struct merge_options *o, } else if (a_sha && b_sha) { /* Case C: Added in both (check for same permissions) and */ /* case D: Modified in both, but differently. */ - const char *reason = "content"; - struct merge_file_info mfi; - struct diff_filespec one, a, b; - - if (!o_sha) { - reason = "add/add"; - o_sha = (unsigned char *)null_sha1; - } - output(o, 2, "Auto-merging %s", path); - one.path = a.path = b.path = (char *)path; - hashcpy(one.sha1, o_sha); - one.mode = o_mode; - hashcpy(a.sha1, a_sha); - a.mode = a_mode; - hashcpy(b.sha1, b_sha); - b.mode = b_mode; - - mfi = merge_file(o, &one, &a, &b, - o->branch1, o->branch2); - - clean_merge = mfi.clean; - if (!mfi.clean) { - if (S_ISGITLINK(mfi.mode)) - reason = "submodule"; - output(o, 1, "CONFLICT (%s): Merge conflict in %s", - reason, path); - } - update_file(o, mfi.clean, mfi.sha, mfi.mode, path); + clean_merge = merge_content(o, path, + o_sha, o_mode, a_sha, a_mode, b_sha, b_mode, + NULL); } else if (!o_sha && !a_sha && !b_sha) { /* * this entry was deleted altogether. a_mode == 0 means @@ -1239,13 +1384,19 @@ static int process_entry(struct merge_options *o, } /* - * Per entry merge function for D/F conflicts, to be called only after - * all files below dir have been processed. We do this because in the - * cases we can cleanly resolve D/F conflicts, process_entry() can clean - * out all the files below the directory for us. + * Per entry merge function for D/F (and/or rename) conflicts. In the + * cases we can cleanly resolve D/F conflicts, process_entry() can + * clean out all the files below the directory for us. All D/F + * conflict cases must be handled here at the end to make sure any + * directories that can be cleaned out, are. + * + * Some rename conflicts may also be handled here that don't necessarily + * involve D/F conflicts, since the code to handle them is generic enough + * to handle those rename conflicts with or without D/F conflicts also + * being involved. */ static int process_df_entry(struct merge_options *o, - const char *path, struct stage_data *entry) + const char *path, struct stage_data *entry) { int clean_merge = 1; unsigned o_mode = entry->stages[1].mode; @@ -1254,43 +1405,91 @@ static int process_df_entry(struct merge_options *o, unsigned char *o_sha = stage_sha(entry->stages[1].sha, o_mode); unsigned char *a_sha = stage_sha(entry->stages[2].sha, a_mode); unsigned char *b_sha = stage_sha(entry->stages[3].sha, b_mode); - const char *add_branch; - const char *other_branch; - unsigned mode; - const unsigned char *sha; - const char *conf; struct stat st; - /* We currently only handle D->F cases */ - assert((!o_sha && a_sha && !b_sha) || - (!o_sha && !a_sha && b_sha)); - entry->processed = 1; - - if (a_sha) { - add_branch = o->branch1; - other_branch = o->branch2; - mode = a_mode; - sha = a_sha; - conf = "file/directory"; - } else { - add_branch = o->branch2; - other_branch = o->branch1; - mode = b_mode; - sha = b_sha; - conf = "directory/file"; - } - if (lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) { - const char *new_path = unique_path(o, path, add_branch); + if (entry->rename_df_conflict_info) { + struct rename_df_conflict_info *conflict_info = entry->rename_df_conflict_info; + char *src; + switch (conflict_info->rename_type) { + case RENAME_NORMAL: + clean_merge = merge_content(o, path, + o_sha, o_mode, a_sha, a_mode, b_sha, b_mode, + conflict_info->branch1); + break; + case RENAME_DELETE: + clean_merge = 0; + conflict_rename_delete(o, conflict_info->pair1, + conflict_info->branch1, + conflict_info->branch2); + break; + case RENAME_ONE_FILE_TO_TWO: + src = conflict_info->pair1->one->path; + clean_merge = 0; + output(o, 1, "CONFLICT (rename/rename): " + "Rename \"%s\"->\"%s\" in branch \"%s\" " + "rename \"%s\"->\"%s\" in \"%s\"%s", + src, conflict_info->pair1->two->path, conflict_info->branch1, + src, conflict_info->pair2->two->path, conflict_info->branch2, + o->call_depth ? " (left unresolved)" : ""); + if (o->call_depth) { + remove_file_from_cache(src); + update_file(o, 0, conflict_info->pair1->one->sha1, + conflict_info->pair1->one->mode, src); + } + conflict_rename_rename_1to2(o, conflict_info->pair1, + conflict_info->branch1, + conflict_info->pair2, + conflict_info->branch2); + conflict_info->dst_entry2->processed = 1; + break; + default: + entry->processed = 0; + break; + } + } else if (o_sha && (!a_sha || !b_sha)) { + /* Modify/delete; deleted side may have put a directory in the way */ + const char *new_path = path; + if (lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) + new_path = unique_path(o, path, a_sha ? o->branch1 : o->branch2); clean_merge = 0; - output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. " - "Adding %s as %s", - conf, path, other_branch, path, new_path); - remove_file(o, 0, path, 0); - update_file(o, 0, sha, mode, new_path); + handle_delete_modify(o, path, new_path, + a_sha, a_mode, b_sha, b_mode); + } else if (!o_sha && !!a_sha != !!b_sha) { + /* directory -> (directory, file) */ + const char *add_branch; + const char *other_branch; + unsigned mode; + const unsigned char *sha; + const char *conf; + + if (a_sha) { + add_branch = o->branch1; + other_branch = o->branch2; + mode = a_mode; + sha = a_sha; + conf = "file/directory"; + } else { + add_branch = o->branch2; + other_branch = o->branch1; + mode = b_mode; + sha = b_sha; + conf = "directory/file"; + } + if (lstat(path, &st) == 0 && S_ISDIR(st.st_mode)) { + const char *new_path = unique_path(o, path, add_branch); + clean_merge = 0; + output(o, 1, "CONFLICT (%s): There is a directory with name %s in %s. " + "Adding %s as %s", + conf, path, other_branch, path, new_path); + update_file(o, 0, sha, mode, new_path); + } else { + output(o, 2, "Adding %s", path); + update_file(o, 1, sha, mode, path); + } } else { - output(o, 2, "Adding %s", path); - update_file(o, 1, sha, mode, path); + entry->processed = 0; + return 1; /* not handled; assume clean until processed */ } return clean_merge; @@ -1335,6 +1534,7 @@ int merge_trees(struct merge_options *o, get_files_dirs(o, merge); entries = get_unmerged(); + make_room_for_directories_of_df_conflicts(o, entries); re_head = get_renames(o, head, common, head, merge, entries); re_merge = get_renames(o, merge, common, head, merge, entries); clean = process_renames(o, re_head, re_merge); @@ -1352,6 +1552,12 @@ int merge_trees(struct merge_options *o, && !process_df_entry(o, path, e)) clean = 0; } + for (i = 0; i < entries->nr; i++) { + struct stage_data *e = entries->items[i].util; + if (!e->processed) + die("Unprocessed path??? %s", + entries->items[i].string); + } string_list_clear(re_merge, 0); string_list_clear(re_head, 0); diff --git a/t/t3030-merge-recursive.sh b/t/t3030-merge-recursive.sh index 20d4f11db..34794f8a7 100755 --- a/t/t3030-merge-recursive.sh +++ b/t/t3030-merge-recursive.sh @@ -25,6 +25,10 @@ test_expect_success 'setup 1' ' git branch submod && git branch copy && git branch rename && + if test_have_prereq SYMLINKS + then + git branch rename-ln + fi && echo hello >>a && cp a d/e && @@ -255,7 +259,16 @@ test_expect_success 'setup 8' ' git mv a e && git add e && test_tick && - git commit -m "rename a->e" + git commit -m "rename a->e" && + if test_have_prereq SYMLINKS + then + git checkout rename-ln && + git mv a e && + ln -s e a && + git add a e && + test_tick && + git commit -m "rename a->e, symlink a->e" + fi ' test_expect_success 'setup 9' ' @@ -615,4 +628,26 @@ test_expect_success 'merge-recursive copy vs. rename' ' test_cmp expected actual ' +if test_have_prereq SYMLINKS +then + test_expect_success 'merge-recursive rename vs. rename/symlink' ' + + git checkout -f rename && + git merge rename-ln && + ( git ls-tree -r HEAD ; git ls-files -s ) >actual && + ( + echo "100644 blob $o0 b" + echo "100644 blob $o0 c" + echo "100644 blob $o0 d/e" + echo "100644 blob $o0 e" + echo "100644 $o0 0 b" + echo "100644 $o0 0 c" + echo "100644 $o0 0 d/e" + echo "100644 $o0 0 e" + ) >expected && + test_cmp expected actual + ' +fi + + test_done diff --git a/t/t3509-cherry-pick-merge-df.sh b/t/t3509-cherry-pick-merge-df.sh index a5ccdbf8f..948ca1bce 100755 --- a/t/t3509-cherry-pick-merge-df.sh +++ b/t/t3509-cherry-pick-merge-df.sh @@ -32,4 +32,70 @@ test_expect_success SYMLINKS 'Cherry-pick succeeds with rename across D/F confli git cherry-pick branch ' +test_expect_success 'Setup rename with file on one side matching directory name on other' ' + git checkout --orphan nick-testcase && + git rm -rf . && + + >empty && + git add empty && + git commit -m "Empty file" && + + git checkout -b simple && + mv empty file && + mkdir empty && + mv file empty && + git add empty/file && + git commit -m "Empty file under empty dir" && + + echo content >newfile && + git add newfile && + git commit -m "New file" +' + +test_expect_success 'Cherry-pick succeeds with was_a_dir/file -> was_a_dir (resolve)' ' + git reset --hard && + git checkout -q nick-testcase^0 && + git cherry-pick --strategy=resolve simple +' + +test_expect_success 'Cherry-pick succeeds with was_a_dir/file -> was_a_dir (recursive)' ' + git reset --hard && + git checkout -q nick-testcase^0 && + git cherry-pick --strategy=recursive simple +' + +test_expect_success 'Setup rename with file on one side matching different dirname on other' ' + git reset --hard && + git checkout --orphan mergeme && + git rm -rf . && + + mkdir sub && + mkdir othersub && + echo content > sub/file && + echo foo > othersub/whatever && + git add -A && + git commit -m "Common commmit" && + + git rm -rf othersub && + git mv sub/file othersub && + git commit -m "Commit to merge" && + + git checkout -b newhead mergeme~1 && + >independent-change && + git add independent-change && + git commit -m "Completely unrelated change" +' + +test_expect_success 'Cherry-pick with rename to different D/F conflict succeeds (resolve)' ' + git reset --hard && + git checkout -q newhead^0 && + git cherry-pick --strategy=resolve mergeme +' + +test_expect_success 'Cherry-pick with rename to different D/F conflict succeeds (recursive)' ' + git reset --hard && + git checkout -q newhead^0 && + git cherry-pick --strategy=recursive mergeme +' + test_done diff --git a/t/t6020-merge-df.sh b/t/t6020-merge-df.sh index 5d91d056d..eec8f4e3e 100755 --- a/t/t6020-merge-df.sh +++ b/t/t6020-merge-df.sh @@ -6,19 +6,22 @@ test_description='Test merge with directory/file conflicts' . ./test-lib.sh -test_expect_success 'prepare repository' \ -'echo "Hello" > init && -git add init && -git commit -m "Initial commit" && -git branch B && -mkdir dir && -echo "foo" > dir/foo && -git add dir/foo && -git commit -m "File: dir/foo" && -git checkout B && -echo "file dir" > dir && -git add dir && -git commit -m "File: dir"' +test_expect_success 'prepare repository' ' + echo Hello >init && + git add init && + git commit -m initial && + + git branch B && + mkdir dir && + echo foo >dir/foo && + git add dir/foo && + git commit -m "File: dir/foo" && + + git checkout B && + echo file dir >dir && + git add dir && + git commit -m "File: dir" +' test_expect_success 'Merge with d/f conflicts' ' test_expect_code 1 git merge "merge msg" B master @@ -47,4 +50,51 @@ test_expect_success 'F/D conflict' ' git merge master ' +test_expect_success 'setup modify/delete + directory/file conflict' ' + git checkout --orphan modify && + git rm -rf . && + git clean -fdqx && + + printf "a\nb\nc\nd\ne\nf\ng\nh\n" >letters && + git add letters && + git commit -m initial && + + echo i >>letters && + git add letters && + git commit -m modified && + + git checkout -b delete HEAD^ && + git rm letters && + mkdir letters && + >letters/file && + git add letters && + git commit -m deleted +' + +test_expect_success 'modify/delete + directory/file conflict' ' + git checkout delete^0 && + test_must_fail git merge modify && + + test 3 = $(git ls-files -s | wc -l) && + test 2 = $(git ls-files -u | wc -l) && + test 1 = $(git ls-files -o | wc -l) && + + test -f letters/file && + test -f letters~modify +' + +test_expect_success 'modify/delete + directory/file conflict; other way' ' + git reset --hard && + git clean -f && + git checkout modify^0 && + test_must_fail git merge delete && + + test 3 = $(git ls-files -s | wc -l) && + test 2 = $(git ls-files -u | wc -l) && + test 1 = $(git ls-files -o | wc -l) && + + test -f letters/file && + test -f letters~HEAD +' + test_done diff --git a/t/t6022-merge-rename.sh b/t/t6022-merge-rename.sh index 83efc7abf..1ed259d86 100755 --- a/t/t6022-merge-rename.sh +++ b/t/t6022-merge-rename.sh @@ -3,6 +3,11 @@ test_description='Merge-recursive merging renames' . ./test-lib.sh +modify () { + sed -e "$1" <"$2" >"$2.x" && + mv "$2.x" "$2" +} + test_expect_success setup \ ' cat >A <<\EOF && @@ -243,4 +248,365 @@ test_expect_success 'merge of identical changes in a renamed file' ' GIT_MERGE_VERBOSITY=3 git merge change+rename | grep "^Skipped B" ' +test_expect_success 'setup for rename + d/f conflicts' ' + git reset --hard && + git checkout --orphan dir-in-way && + git rm -rf . && + + mkdir sub && + mkdir dir && + printf "1\n2\n3\n4\n5\n6\n7\n8\n9\n10\n" >sub/file && + echo foo >dir/file-in-the-way && + git add -A && + git commit -m "Common commmit" && + + echo 11 >>sub/file && + echo more >>dir/file-in-the-way && + git add -u && + git commit -m "Commit to merge, with dir in the way" && + + git checkout -b dir-not-in-way && + git reset --soft HEAD^ && + git rm -rf dir && + git commit -m "Commit to merge, with dir removed" -- dir sub/file && + + git checkout -b renamed-file-has-no-conflicts dir-in-way~1 && + git rm -rf dir && + git rm sub/file && + printf "1\n2\n3\n4\n5555\n6\n7\n8\n9\n10\n" >dir && + git add dir && + git commit -m "Independent change" && + + git checkout -b renamed-file-has-conflicts dir-in-way~1 && + git rm -rf dir && + git mv sub/file dir && + echo 12 >>dir && + git add dir && + git commit -m "Conflicting change" +' + +printf "1\n2\n3\n4\n5555\n6\n7\n8\n9\n10\n11\n" >expected + +test_expect_success 'Rename+D/F conflict; renamed file merges + dir not in way' ' + git reset --hard && + git checkout -q renamed-file-has-no-conflicts^0 && + git merge --strategy=recursive dir-not-in-way && + git diff --quiet && + test -f dir && + test_cmp expected dir +' + +test_expect_success 'Rename+D/F conflict; renamed file merges but dir in way' ' + git reset --hard && + rm -rf dir~* && + git checkout -q renamed-file-has-no-conflicts^0 && + test_must_fail git merge --strategy=recursive dir-in-way >output && + + grep "CONFLICT (delete/modify): dir/file-in-the-way" output && + grep "Auto-merging dir" output && + grep "Adding as dir~HEAD instead" output && + + test 2 -eq "$(git ls-files -u | wc -l)" && + test 2 -eq "$(git ls-files -u dir/file-in-the-way | wc -l)" && + + test_must_fail git diff --quiet && + test_must_fail git diff --cached --quiet && + + test -f dir/file-in-the-way && + test -f dir~HEAD && + test_cmp expected dir~HEAD +' + +test_expect_success 'Same as previous, but merged other way' ' + git reset --hard && + rm -rf dir~* && + git checkout -q dir-in-way^0 && + test_must_fail git merge --strategy=recursive renamed-file-has-no-conflicts >output 2>errors && + + ! grep "error: refusing to lose untracked file at" errors && + grep "CONFLICT (delete/modify): dir/file-in-the-way" output && + grep "Auto-merging dir" output && + grep "Adding as dir~renamed-file-has-no-conflicts instead" output && + + test 2 -eq "$(git ls-files -u | wc -l)" && + test 2 -eq "$(git ls-files -u dir/file-in-the-way | wc -l)" && + + test_must_fail git diff --quiet && + test_must_fail git diff --cached --quiet && + + test -f dir/file-in-the-way && + test -f dir~renamed-file-has-no-conflicts && + test_cmp expected dir~renamed-file-has-no-conflicts +' + +cat >expected <<\EOF && +1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +<<<<<<< HEAD +12 +======= +11 +>>>>>>> dir-not-in-way +EOF + +test_expect_success 'Rename+D/F conflict; renamed file cannot merge, dir not in way' ' + git reset --hard && + rm -rf dir~* && + git checkout -q renamed-file-has-conflicts^0 && + test_must_fail git merge --strategy=recursive dir-not-in-way && + + test 3 -eq "$(git ls-files -u | wc -l)" && + test 3 -eq "$(git ls-files -u dir | wc -l)" && + + test_must_fail git diff --quiet && + test_must_fail git diff --cached --quiet && + + test -f dir && + test_cmp expected dir +' + +test_expect_success 'Rename+D/F conflict; renamed file cannot merge and dir in the way' ' + modify s/dir-not-in-way/dir-in-way/ expected && + + git reset --hard && + rm -rf dir~* && + git checkout -q renamed-file-has-conflicts^0 && + test_must_fail git merge --strategy=recursive dir-in-way && + + test 5 -eq "$(git ls-files -u | wc -l)" && + test 3 -eq "$(git ls-files -u dir | grep -v file-in-the-way | wc -l)" && + test 2 -eq "$(git ls-files -u dir/file-in-the-way | wc -l)" && + + test_must_fail git diff --quiet && + test_must_fail git diff --cached --quiet && + + test -f dir/file-in-the-way && + test -f dir~HEAD && + test_cmp expected dir~HEAD +' + +cat >expected <<\EOF && +1 +2 +3 +4 +5 +6 +7 +8 +9 +10 +<<<<<<< HEAD +11 +======= +12 +>>>>>>> renamed-file-has-conflicts +EOF + +test_expect_success 'Same as previous, but merged other way' ' + git reset --hard && + rm -rf dir~* && + git checkout -q dir-in-way^0 && + test_must_fail git merge --strategy=recursive renamed-file-has-conflicts && + + test 5 -eq "$(git ls-files -u | wc -l)" && + test 3 -eq "$(git ls-files -u dir | grep -v file-in-the-way | wc -l)" && + test 2 -eq "$(git ls-files -u dir/file-in-the-way | wc -l)" && + + test_must_fail git diff --quiet && + test_must_fail git diff --cached --quiet && + + test -f dir/file-in-the-way && + test -f dir~renamed-file-has-conflicts && + test_cmp expected dir~renamed-file-has-conflicts +' + +test_expect_success 'setup both rename source and destination involved in D/F conflict' ' + git reset --hard && + git checkout --orphan rename-dest && + git rm -rf . && + git clean -fdqx && + + mkdir one && + echo stuff >one/file && + git add -A && + git commit -m "Common commmit" && + + git mv one/file destdir && + git commit -m "Renamed to destdir" && + + git checkout -b source-conflict HEAD~1 && + git rm -rf one && + mkdir destdir && + touch one destdir/foo && + git add -A && + git commit -m "Conflicts in the way" +' + +test_expect_success 'both rename source and destination involved in D/F conflict' ' + git reset --hard && + rm -rf dir~* && + git checkout -q rename-dest^0 && + test_must_fail git merge --strategy=recursive source-conflict && + + test 1 -eq "$(git ls-files -u | wc -l)" && + + test_must_fail git diff --quiet && + + test -f destdir/foo && + test -f one && + test -f destdir~HEAD && + test "stuff" = "$(cat destdir~HEAD)" +' + +test_expect_success 'setup pair rename to parent of other (D/F conflicts)' ' + git reset --hard && + git checkout --orphan rename-two && + git rm -rf . && + git clean -fdqx && + + mkdir one && + mkdir two && + echo stuff >one/file && + echo other >two/file && + git add -A && + git commit -m "Common commmit" && + + git rm -rf one && + git mv two/file one && + git commit -m "Rename two/file -> one" && + + git checkout -b rename-one HEAD~1 && + git rm -rf two && + git mv one/file two && + rm -r one && + git commit -m "Rename one/file -> two" +' + +test_expect_success 'pair rename to parent of other (D/F conflicts) w/ untracked dir' ' + git checkout -q rename-one^0 && + mkdir one && + test_must_fail git merge --strategy=recursive rename-two && + + test 2 -eq "$(git ls-files -u | wc -l)" && + test 1 -eq "$(git ls-files -u one | wc -l)" && + test 1 -eq "$(git ls-files -u two | wc -l)" && + + test_must_fail git diff --quiet && + + test 4 -eq $(find . | grep -v .git | wc -l) && + + test -d one && + test -f one~rename-two && + test -f two && + test "other" = $(cat one~rename-two) && + test "stuff" = $(cat two) +' + +test_expect_success 'pair rename to parent of other (D/F conflicts) w/ clean start' ' + git reset --hard && + git clean -fdqx && + test_must_fail git merge --strategy=recursive rename-two && + + test 2 -eq "$(git ls-files -u | wc -l)" && + test 1 -eq "$(git ls-files -u one | wc -l)" && + test 1 -eq "$(git ls-files -u two | wc -l)" && + + test_must_fail git diff --quiet && + + test 3 -eq $(find . | grep -v .git | wc -l) && + + test -f one && + test -f two && + test "other" = $(cat one) && + test "stuff" = $(cat two) +' + +test_expect_success 'setup rename of one file to two, with directories in the way' ' + git reset --hard && + git checkout --orphan first-rename && + git rm -rf . && + git clean -fdqx && + + echo stuff >original && + git add -A && + git commit -m "Common commmit" && + + mkdir two && + >two/file && + git add two/file && + git mv original one && + git commit -m "Put two/file in the way, rename to one" && + + git checkout -b second-rename HEAD~1 && + mkdir one && + >one/file && + git add one/file && + git mv original two && + git commit -m "Put one/file in the way, rename to two" +' + +test_expect_success 'check handling of differently renamed file with D/F conflicts' ' + git checkout -q first-rename^0 && + test_must_fail git merge --strategy=recursive second-rename && + + test 5 -eq "$(git ls-files -s | wc -l)" && + test 3 -eq "$(git ls-files -u | wc -l)" && + test 1 -eq "$(git ls-files -u one | wc -l)" && + test 1 -eq "$(git ls-files -u two | wc -l)" && + test 1 -eq "$(git ls-files -u original | wc -l)" && + test 2 -eq "$(git ls-files -o | wc -l)" && + + test -f one/file && + test -f two/file && + test -f one~HEAD && + test -f two~second-rename && + ! test -f original +' + +test_expect_success 'setup rename one file to two; directories moving out of the way' ' + git reset --hard && + git checkout --orphan first-rename-redo && + git rm -rf . && + git clean -fdqx && + + echo stuff >original && + mkdir one two && + touch one/file two/file && + git add -A && + git commit -m "Common commmit" && + + git rm -rf one && + git mv original one && + git commit -m "Rename to one" && + + git checkout -b second-rename-redo HEAD~1 && + git rm -rf two && + git mv original two && + git commit -m "Rename to two" +' + +test_expect_success 'check handling of differently renamed file with D/F conflicts' ' + git checkout -q first-rename-redo^0 && + test_must_fail git merge --strategy=recursive second-rename-redo && + + test 3 -eq "$(git ls-files -u | wc -l)" && + test 1 -eq "$(git ls-files -u one | wc -l)" && + test 1 -eq "$(git ls-files -u two | wc -l)" && + test 1 -eq "$(git ls-files -u original | wc -l)" && + test 0 -eq "$(git ls-files -o | wc -l)" && + + test -f one && + test -f two && + ! test -f original +' + test_done diff --git a/t/t6032-merge-large-rename.sh b/t/t6032-merge-large-rename.sh index eac5ebac2..fdb6c2537 100755 --- a/t/t6032-merge-large-rename.sh +++ b/t/t6032-merge-large-rename.sh @@ -70,4 +70,34 @@ test_expect_success 'set merge.renamelimit to 5' ' test_rename 5 ok test_rename 6 fail +test_expect_success 'setup large simple rename' ' + git config --unset merge.renamelimit && + git config --unset diff.renamelimit && + + git reset --hard initial && + for i in $(count 200); do + make_text foo bar baz >$i + done && + git add . && + git commit -m create-files && + + git branch simple-change && + git checkout -b simple-rename && + + mkdir builtin && + git mv [0-9]* builtin/ && + git commit -m renamed && + + git checkout simple-change && + >unrelated-change && + git add unrelated-change && + git commit -m unrelated-change +' + +test_expect_success 'massive simple rename does not spam added files' ' + unset GIT_MERGE_VERBOSITY && + git merge --no-stat simple-rename | grep -v Removing >output && + test 5 -gt "$(wc -l < output)" +' + test_done diff --git a/t/t6036-recursive-corner-cases.sh b/t/t6036-recursive-corner-cases.sh index 004c365ad..871577d90 100755 --- a/t/t6036-recursive-corner-cases.sh +++ b/t/t6036-recursive-corner-cases.sh @@ -14,7 +14,7 @@ test_description='recursive merge corner cases' # R1 R2 # -test_expect_success setup ' +test_expect_success 'setup basic criss-cross + rename with no modifications' ' ten="0 1 2 3 4 5 6 7 8 9" && for i in $ten do @@ -45,11 +45,190 @@ test_expect_success setup ' git tag R2 ' -test_expect_success merge ' +test_expect_success 'merge simple rename+criss-cross with no modifications' ' git reset --hard && git checkout L2^0 && - test_must_fail git merge -s recursive R2^0 + test_must_fail git merge -s recursive R2^0 && + + test 5 = $(git ls-files -s | wc -l) && + test 3 = $(git ls-files -u | wc -l) && + test 0 = $(git ls-files -o | wc -l) && + + test $(git rev-parse :0:one) = $(git rev-parse L2:one) && + test $(git rev-parse :0:two) = $(git rev-parse R2:two) && + test $(git rev-parse :2:three) = $(git rev-parse L2:three) && + test $(git rev-parse :3:three) = $(git rev-parse R2:three) && + + cp two merged && + >empty && + test_must_fail git merge-file \ + -L "Temporary merge branch 2" \ + -L "" \ + -L "Temporary merge branch 1" \ + merged empty one && + test $(git rev-parse :1:three) = $(git hash-object merged) +' + +# +# Same as before, but modify L1 slightly: +# +# L1m L2 +# o---o +# / \ / \ +# o X ? +# \ / \ / +# o---o +# R1 R2 +# + +test_expect_success 'setup criss-cross + rename merges with basic modification' ' + git rm -rf . && + git clean -fdqx && + rm -rf .git && + git init && + + ten="0 1 2 3 4 5 6 7 8 9" + for i in $ten + do + echo line $i in a sample file + done >one && + for i in $ten + do + echo line $i in another sample file + done >two && + git add one two && + test_tick && git commit -m initial && + + git branch L1 && + git checkout -b R1 && + git mv one three && + echo more >>two && + git add two && + test_tick && git commit -m R1 && + + git checkout L1 && + git mv two three && + test_tick && git commit -m L1 && + + git checkout L1^0 && + test_tick && git merge -s ours R1 && + git tag L2 && + + git checkout R1^0 && + test_tick && git merge -s ours L1 && + git tag R2 +' + +test_expect_success 'merge criss-cross + rename merges with basic modification' ' + git reset --hard && + git checkout L2^0 && + + test_must_fail git merge -s recursive R2^0 && + + test 5 = $(git ls-files -s | wc -l) && + test 3 = $(git ls-files -u | wc -l) && + test 0 = $(git ls-files -o | wc -l) && + + test $(git rev-parse :0:one) = $(git rev-parse L2:one) && + test $(git rev-parse :0:two) = $(git rev-parse R2:two) && + test $(git rev-parse :2:three) = $(git rev-parse L2:three) && + test $(git rev-parse :3:three) = $(git rev-parse R2:three) && + + head -n 10 two >merged && + cp one merge-me && + >empty && + test_must_fail git merge-file \ + -L "Temporary merge branch 2" \ + -L "" \ + -L "Temporary merge branch 1" \ + merged empty merge-me && + test $(git rev-parse :1:three) = $(git hash-object merged) +' + +# +# For the next test, we start with three commits in two lines of development +# which setup a rename/add conflict: +# Commit A: File 'a' exists +# Commit B: Rename 'a' -> 'new_a' +# Commit C: Modify 'a', create different 'new_a' +# Later, two different people merge and resolve differently: +# Commit D: Merge B & C, ignoring separately created 'new_a' +# Commit E: Merge B & C making use of some piece of secondary 'new_a' +# Finally, someone goes to merge D & E. Does git detect the conflict? +# +# B D +# o---o +# / \ / \ +# A o X ? F +# \ / \ / +# o---o +# C E +# + +test_expect_success 'setup differently handled merges of rename/add conflict' ' + git rm -rf . && + git clean -fdqx && + rm -rf .git && + git init && + + printf "0\n1\n2\n3\n4\n5\n6\n7\n8\n9\n" >a && + git add a && + test_tick && git commit -m A && + + git branch B && + git checkout -b C && + echo 10 >>a && + echo "other content" >>new_a && + git add a new_a && + test_tick && git commit -m C && + + git checkout B && + git mv a new_a && + test_tick && git commit -m B && + + git checkout B^0 && + test_must_fail git merge C && + git clean -f && + test_tick && git commit -m D && + git tag D && + + git checkout C^0 && + test_must_fail git merge B && + rm new_a~HEAD new_a && + printf "Incorrectly merged content" >>new_a && + git add -u && + test_tick && git commit -m E && + git tag E +' + +test_expect_success 'git detects differently handled merges conflict' ' + git reset --hard && + git checkout D^0 && + + git merge -s recursive E^0 && { + echo "BAD: should have conflicted" + test "Incorrectly merged content" = "$(cat new_a)" && + echo "BAD: Silently accepted wrong content" + return 1 + } + + test 3 = $(git ls-files -s | wc -l) && + test 3 = $(git ls-files -u | wc -l) && + test 0 = $(git ls-files -o | wc -l) && + + test $(git rev-parse :2:new_a) = $(git rev-parse D:new_a) && + test $(git rev-parse :3:new_a) = $(git rev-parse E:new_a) && + + git cat-file -p B:new_a >>merged && + git cat-file -p C:new_a >>merge-me && + >empty && + test_must_fail git merge-file \ + -L "Temporary merge branch 2" \ + -L "" \ + -L "Temporary merge branch 1" \ + merged empty merge-me && + test $(git rev-parse :1:new_a) = $(git hash-object merged) ' test_done