diff options
author | Junio C Hamano <gitster@pobox.com> | 2022-08-30 00:55:11 +0300 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2022-08-30 00:55:11 +0300 |
commit | 0b08ba7eb666803973ccbb60b8e1a4436fe494b5 (patch) | |
tree | 9819ec92b87a56116b429e8968176c7ba2d3693b | |
parent | 64cb4c34d1c27969c6556cbe339a73e88758d7e6 (diff) | |
parent | 257418c59040c13bfa839e01922e21833cda6a52 (diff) |
Merge branch 'en/ancestry-path-in-a-range'
"git rev-list --ancestry-path=C A..B" is a natural extension of
"git rev-list A..B"; instead of choosing a subset of A..B to those
that have ancestry relationship with A, it lets a subset with
ancestry relationship with C.
* en/ancestry-path-in-a-range:
revision: allow --ancestry-path to take an argument
t6019: modernize tests with helper
rev-list-options.txt: fix simple typo
-rw-r--r-- | Documentation/rev-list-options.txt | 46 | ||||
-rw-r--r-- | object.h | 2 | ||||
-rw-r--r-- | revision.c | 89 | ||||
-rw-r--r-- | revision.h | 9 | ||||
-rwxr-xr-x | t/t6019-rev-list-ancestry-path.sh | 101 |
5 files changed, 141 insertions, 106 deletions
diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt index bd08d18576..1837509566 100644 --- a/Documentation/rev-list-options.txt +++ b/Documentation/rev-list-options.txt @@ -392,12 +392,14 @@ Default mode:: merges from the resulting history, as there are no selected commits contributing to this merge. ---ancestry-path:: +--ancestry-path[=<commit>]:: When given a range of commits to display (e.g. 'commit1..commit2' - or 'commit2 {caret}commit1'), only display commits that exist - directly on the ancestry chain between the 'commit1' and - 'commit2', i.e. commits that are both descendants of 'commit1', - and ancestors of 'commit2'. + or 'commit2 {caret}commit1'), only display commits in that range + that are ancestors of <commit>, descendants of <commit>, or + <commit> itself. If no commit is specified, use 'commit1' (the + excluded part of the range) as <commit>. Can be passed multiple + times; if so, a commit is included if it is any of the commits + given or if it is an ancestor or descendant of one of them. A more detailed explanation follows. @@ -571,11 +573,10 @@ Note the major differences in `N`, `P`, and `Q` over `--full-history`: There is another simplification mode available: ---ancestry-path:: - Limit the displayed commits to those directly on the ancestry - chain between the ``from'' and ``to'' commits in the given commit - range. I.e. only display commits that are ancestor of the ``to'' - commit and descendants of the ``from'' commit. +--ancestry-path[=<commit>]:: + Limit the displayed commits to those which are an ancestor of + <commit>, or which are a descendant of <commit>, or are <commit> + itself. + As an example use case, consider the following commit history: + @@ -607,6 +608,29 @@ option does. Applied to the 'D..M' range, it results in: \ L--M ----------------------------------------------------------------------- ++ +We can also use `--ancestry-path=D` instead of `--ancestry-path` which +means the same thing when applied to the 'D..M' range but is just more +explicit. ++ +If we instead are interested in a given topic within this range, and all +commits affected by that topic, we may only want to view the subset of +`D..M` which contain that topic in their ancestry path. So, using +`--ancestry-path=H D..M` for example would result in: ++ +----------------------------------------------------------------------- + E + \ + G---H---I---J + \ + L--M +----------------------------------------------------------------------- ++ +Whereas `--ancestry-path=K D..M` would result in ++ +----------------------------------------------------------------------- + K---------------L--M +----------------------------------------------------------------------- Before discussing another option, `--show-pulls`, we need to create a new example history. @@ -662,7 +686,7 @@ Here, the merge commits `O` and `P` contribute extra noise, as they did not actually contribute a change to `file.txt`. They only merged a topic that was based on an older version of `file.txt`. This is a common issue in repositories using a workflow where many contributors work in -parallel and merge their topic branches along a single trunk: manu +parallel and merge their topic branches along a single trunk: many unrelated merges appear in the `--full-history` results. When using the `--simplify-merges` option, the commits `O` and `P` @@ -59,7 +59,7 @@ struct object_array { /* * object flag allocation: - * revision.h: 0---------10 15 23------26 + * revision.h: 0---------10 15 23------27 * fetch-pack.c: 01 67 * negotiator/default.c: 2--5 * walker.c: 0-2 diff --git a/revision.c b/revision.c index f4eee11cc8..ee702e498a 100644 --- a/revision.c +++ b/revision.c @@ -1105,7 +1105,7 @@ static int process_parents(struct rev_info *revs, struct commit *commit, struct commit_list **list, struct prio_queue *queue) { struct commit_list *parent = commit->parents; - unsigned left_flag; + unsigned pass_flags; if (commit->object.flags & ADDED) return 0; @@ -1160,7 +1160,7 @@ static int process_parents(struct rev_info *revs, struct commit *commit, if (revs->no_walk) return 0; - left_flag = (commit->object.flags & SYMMETRIC_LEFT); + pass_flags = (commit->object.flags & (SYMMETRIC_LEFT | ANCESTRY_PATH)); for (parent = commit->parents; parent; parent = parent->next) { struct commit *p = parent->item; @@ -1181,7 +1181,7 @@ static int process_parents(struct rev_info *revs, struct commit *commit, if (!*slot) *slot = *revision_sources_at(revs->sources, commit); } - p->object.flags |= left_flag; + p->object.flags |= pass_flags; if (!(p->object.flags & SEEN)) { p->object.flags |= (SEEN | NOT_USER_GIVEN); if (list) @@ -1304,13 +1304,24 @@ static int still_interesting(struct commit_list *src, timestamp_t date, int slop } /* - * "rev-list --ancestry-path A..B" computes commits that are ancestors - * of B but not ancestors of A but further limits the result to those - * that are descendants of A. This takes the list of bottom commits and - * the result of "A..B" without --ancestry-path, and limits the latter - * further to the ones that can reach one of the commits in "bottom". + * "rev-list --ancestry-path=C_0 [--ancestry-path=C_1 ...] A..B" + * computes commits that are ancestors of B but not ancestors of A but + * further limits the result to those that have any of C in their + * ancestry path (i.e. are either ancestors of any of C, descendants + * of any of C, or are any of C). If --ancestry-path is specified with + * no commit, we use all bottom commits for C. + * + * Before this function is called, ancestors of C will have already + * been marked with ANCESTRY_PATH previously. + * + * This takes the list of bottom commits and the result of "A..B" + * without --ancestry-path, and limits the latter further to the ones + * that have any of C in their ancestry path. Since the ancestors of C + * have already been marked (a prerequisite of this function), we just + * need to mark the descendants, then exclude any commit that does not + * have any of these marks. */ -static void limit_to_ancestry(struct commit_list *bottom, struct commit_list *list) +static void limit_to_ancestry(struct commit_list *bottoms, struct commit_list *list) { struct commit_list *p; struct commit_list *rlist = NULL; @@ -1323,7 +1334,7 @@ static void limit_to_ancestry(struct commit_list *bottom, struct commit_list *li for (p = list; p; p = p->next) commit_list_insert(p->item, &rlist); - for (p = bottom; p; p = p->next) + for (p = bottoms; p; p = p->next) p->item->object.flags |= TMP_MARK; /* @@ -1356,38 +1367,39 @@ static void limit_to_ancestry(struct commit_list *bottom, struct commit_list *li */ /* - * The ones that are not marked with TMP_MARK are uninteresting + * The ones that are not marked with either TMP_MARK or + * ANCESTRY_PATH are uninteresting */ for (p = list; p; p = p->next) { struct commit *c = p->item; - if (c->object.flags & TMP_MARK) + if (c->object.flags & (TMP_MARK | ANCESTRY_PATH)) continue; c->object.flags |= UNINTERESTING; } - /* We are done with the TMP_MARK */ + /* We are done with TMP_MARK and ANCESTRY_PATH */ for (p = list; p; p = p->next) - p->item->object.flags &= ~TMP_MARK; - for (p = bottom; p; p = p->next) - p->item->object.flags &= ~TMP_MARK; + p->item->object.flags &= ~(TMP_MARK | ANCESTRY_PATH); + for (p = bottoms; p; p = p->next) + p->item->object.flags &= ~(TMP_MARK | ANCESTRY_PATH); free_commit_list(rlist); } /* - * Before walking the history, keep the set of "negative" refs the - * caller has asked to exclude. + * Before walking the history, add the set of "negative" refs the + * caller has asked to exclude to the bottom list. * * This is used to compute "rev-list --ancestry-path A..B", as we need * to filter the result of "A..B" further to the ones that can actually * reach A. */ -static struct commit_list *collect_bottom_commits(struct commit_list *list) +static void collect_bottom_commits(struct commit_list *list, + struct commit_list **bottom) { - struct commit_list *elem, *bottom = NULL; + struct commit_list *elem; for (elem = list; elem; elem = elem->next) if (elem->item->object.flags & BOTTOM) - commit_list_insert(elem->item, &bottom); - return bottom; + commit_list_insert(elem->item, bottom); } /* Assumes either left_only or right_only is set */ @@ -1414,12 +1426,12 @@ static int limit_list(struct rev_info *revs) struct commit_list *original_list = revs->commits; struct commit_list *newlist = NULL; struct commit_list **p = &newlist; - struct commit_list *bottom = NULL; struct commit *interesting_cache = NULL; - if (revs->ancestry_path) { - bottom = collect_bottom_commits(original_list); - if (!bottom) + if (revs->ancestry_path_implicit_bottoms) { + collect_bottom_commits(original_list, + &revs->ancestry_path_bottoms); + if (!revs->ancestry_path_bottoms) die("--ancestry-path given but there are no bottom commits"); } @@ -1464,9 +1476,8 @@ static int limit_list(struct rev_info *revs) if (revs->left_only || revs->right_only) limit_left_right(newlist, revs); - if (bottom) - limit_to_ancestry(bottom, newlist); - free_commit_list(bottom); + if (revs->ancestry_path) + limit_to_ancestry(revs->ancestry_path_bottoms, newlist); /* * Check if any commits have become TREESAME by some of their parents @@ -2213,7 +2224,7 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg const struct setup_revision_opt* opt) { const char *arg = argv[0]; - const char *optarg; + const char *optarg = NULL; int argcount; const unsigned hexsz = the_hash_algo->hexsz; @@ -2284,6 +2295,23 @@ static int handle_revision_opt(struct rev_info *revs, int argc, const char **arg revs->ancestry_path = 1; revs->simplify_history = 0; revs->limited = 1; + revs->ancestry_path_implicit_bottoms = 1; + } else if (skip_prefix(arg, "--ancestry-path=", &optarg)) { + struct commit *c; + struct object_id oid; + const char *msg = _("could not get commit for ancestry-path argument %s"); + + revs->ancestry_path = 1; + revs->simplify_history = 0; + revs->limited = 1; + + if (repo_get_oid_committish(revs->repo, optarg, &oid)) + return error(msg, optarg); + get_reference(revs, optarg, &oid, ANCESTRY_PATH); + c = lookup_commit_reference(revs->repo, &oid); + if (!c) + return error(msg, optarg); + commit_list_insert(c, &revs->ancestry_path_bottoms); } else if (!strcmp(arg, "-g") || !strcmp(arg, "--walk-reflogs")) { init_reflog_walk(&revs->reflog_info); } else if (!strcmp(arg, "--default")) { @@ -2993,6 +3021,7 @@ static void release_revisions_topo_walk_info(struct topo_walk_info *info); void release_revisions(struct rev_info *revs) { free_commit_list(revs->commits); + free_commit_list(revs->ancestry_path_bottoms); object_array_clear(&revs->pending); object_array_clear(&revs->boundary_commits); release_revisions_cmdline(&revs->cmdline); diff --git a/revision.h b/revision.h index bb91e7ed91..61a9b1316b 100644 --- a/revision.h +++ b/revision.h @@ -48,6 +48,7 @@ */ #define NOT_USER_GIVEN (1u<<25) #define TRACK_LINEAR (1u<<26) +#define ANCESTRY_PATH (1u<<27) #define ALL_REV_FLAGS (((1u<<11)-1) | NOT_USER_GIVEN | TRACK_LINEAR | PULL_MERGE) #define DECORATE_SHORT_REFS 1 @@ -164,6 +165,13 @@ struct rev_info { cherry_mark:1, bisect:1, ancestry_path:1, + + /* True if --ancestry-path was specified without an + * argument. The bottom revisions are implicitly + * the arguments in this case. + */ + ancestry_path_implicit_bottoms:1, + first_parent_only:1, exclude_first_parent_only:1, line_level_traverse:1, @@ -306,6 +314,7 @@ struct rev_info { struct saved_parents *saved_parents_slab; struct commit_list *previous_parents; + struct commit_list *ancestry_path_bottoms; const char *break_bar; struct revision_sources *sources; diff --git a/t/t6019-rev-list-ancestry-path.sh b/t/t6019-rev-list-ancestry-path.sh index af57a04b7f..738da23628 100755 --- a/t/t6019-rev-list-ancestry-path.sh +++ b/t/t6019-rev-list-ancestry-path.sh @@ -8,8 +8,13 @@ test_description='--ancestry-path' # / \ # A-------K---------------L--M # -# D..M == E F G H I J K L M -# --ancestry-path D..M == E F H I J L M +# D..M == E F G H I J K L M +# --ancestry-path D..M == E F H I J L M +# --ancestry-path=F D..M == E F J L M +# --ancestry-path=G D..M == G H I J L M +# --ancestry-path=H D..M == E G H I J L M +# --ancestry-path=K D..M == K L M +# --ancestry-path=K --ancestry-path=F D..M == E F J K L M # # D..M -- M.t == M # --ancestry-path D..M -- M.t == M @@ -50,73 +55,41 @@ test_expect_success setup ' test_commit M ' -test_expect_success 'rev-list D..M' ' - test_write_lines E F G H I J K L M >expect && - git rev-list --format=%s D..M | - sed -e "/^commit /d" | - sort >actual && - test_cmp expect actual -' - -test_expect_success 'rev-list --ancestry-path D..M' ' - test_write_lines E F H I J L M >expect && - git rev-list --ancestry-path --format=%s D..M | - sed -e "/^commit /d" | - sort >actual && - test_cmp expect actual -' - -test_expect_success 'rev-list D..M -- M.t' ' - echo M >expect && - git rev-list --format=%s D..M -- M.t | - sed -e "/^commit /d" >actual && - test_cmp expect actual -' - -test_expect_success 'rev-list --ancestry-path D..M -- M.t' ' - echo M >expect && - git rev-list --ancestry-path --format=%s D..M -- M.t | - sed -e "/^commit /d" >actual && - test_cmp expect actual -' +test_ancestry () { + args=$1 + expected=$2 + test_expect_success "log $args" " + test_write_lines $expected >expect && + git log --format=%s $args >raw && + + if test -n \"$expected\" + then + sort raw >actual && + test_cmp expect actual + else + test_must_be_empty raw + fi + " +} -test_expect_success 'rev-list F...I' ' - test_write_lines F G H I >expect && - git rev-list --format=%s F...I | - sed -e "/^commit /d" | - sort >actual && - test_cmp expect actual -' +test_ancestry "D..M" "E F G H I J K L M" -test_expect_success 'rev-list --ancestry-path F...I' ' - test_write_lines F H I >expect && - git rev-list --ancestry-path --format=%s F...I | - sed -e "/^commit /d" | - sort >actual && - test_cmp expect actual -' +test_ancestry "--ancestry-path D..M" "E F H I J L M" +test_ancestry "--ancestry-path=F D..M" "E F J L M" +test_ancestry "--ancestry-path=G D..M" "G H I J L M" +test_ancestry "--ancestry-path=H D..M" "E G H I J L M" +test_ancestry "--ancestry-path=K D..M" "K L M" +test_ancestry "--ancestry-path=F --ancestry-path=K D..M" "E F J K L M" -# G.t is dropped in an "-s ours" merge -test_expect_success 'rev-list G..M -- G.t' ' - git rev-list --format=%s G..M -- G.t | - sed -e "/^commit /d" >actual && - test_must_be_empty actual -' +test_ancestry "D..M -- M.t" "M" +test_ancestry "--ancestry-path D..M -- M.t" "M" -test_expect_success 'rev-list --ancestry-path G..M -- G.t' ' - echo L >expect && - git rev-list --ancestry-path --format=%s G..M -- G.t | - sed -e "/^commit /d" >actual && - test_cmp expect actual -' +test_ancestry "F...I" "F G H I" +test_ancestry "--ancestry-path F...I" "F H I" -test_expect_success 'rev-list --ancestry-path --simplify-merges G^..M -- G.t' ' - test_write_lines G L >expect && - git rev-list --ancestry-path --simplify-merges --format=%s G^..M -- G.t | - sed -e "/^commit /d" | - sort >actual && - test_cmp expect actual -' +test_ancestry "G..M -- G.t" "" +test_ancestry "--ancestry-path G..M -- G.t" "L" +test_ancestry "--ancestry-path --simplify-merges G^..M -- G.t" "G L" # b---bc # / \ / |