diff options
-rw-r--r-- | Documentation/config/rebase.txt | 6 | ||||
-rw-r--r-- | Documentation/git-rebase.txt | 170 | ||||
-rw-r--r-- | builtin/rebase.c | 257 | ||||
-rw-r--r-- | contrib/completion/git-prompt.sh | 6 | ||||
-rw-r--r-- | rebase-interactive.c | 7 | ||||
-rw-r--r-- | rebase-interactive.h | 2 | ||||
-rw-r--r-- | sequencer.c | 82 | ||||
-rw-r--r-- | sequencer.h | 3 | ||||
-rwxr-xr-x | t/t3400-rebase.sh | 40 | ||||
-rwxr-xr-x | t/t3401-rebase-and-am-rename.sh | 4 | ||||
-rwxr-xr-x | t/t3404-rebase-interactive.sh | 19 | ||||
-rwxr-xr-x | t/t3406-rebase-message.sh | 19 | ||||
-rwxr-xr-x | t/t3407-rebase-abort.sh | 6 | ||||
-rwxr-xr-x | t/t3420-rebase-autostash.sh | 22 | ||||
-rwxr-xr-x | t/t3421-rebase-topology-linear.sh | 48 | ||||
-rwxr-xr-x | t/t3424-rebase-empty.sh | 126 | ||||
-rwxr-xr-x | t/t3425-rebase-topology-merges.sh | 8 | ||||
-rwxr-xr-x | t/t3427-rebase-subtree.sh | 12 | ||||
-rwxr-xr-x | t/t3432-rebase-fast-forward.sh | 54 | ||||
-rwxr-xr-x | t/t5407-post-rewrite-hook.sh | 16 | ||||
-rwxr-xr-x | t/t5520-pull.sh | 27 | ||||
-rwxr-xr-x | t/t6047-diff3-conflict-markers.sh | 13 | ||||
-rwxr-xr-x | t/t7512-status-help.sh | 12 | ||||
-rwxr-xr-x | t/t9106-git-svn-commit-diff-clobber.sh | 3 | ||||
-rwxr-xr-x | t/t9903-bash-prompt.sh | 8 |
25 files changed, 693 insertions, 277 deletions
diff --git a/Documentation/config/rebase.txt b/Documentation/config/rebase.txt index d98e32d812..7f7a07d22f 100644 --- a/Documentation/config/rebase.txt +++ b/Documentation/config/rebase.txt @@ -5,6 +5,12 @@ rebase.useBuiltin:: is always used. Setting this will emit a warning, to alert any remaining users that setting this now does nothing. +rebase.backend:: + Default backend to use for rebasing. Possible choices are + 'apply' or 'merge'. In the future, if the merge backend gains + all remaining capabilities of the apply backend, this setting + may become unused. + rebase.stat:: Whether to show a diffstat of what changed upstream since the last rebase. False by default. diff --git a/Documentation/git-rebase.txt b/Documentation/git-rebase.txt index 0c4f038dd6..8c1f4b8268 100644 --- a/Documentation/git-rebase.txt +++ b/Documentation/git-rebase.txt @@ -258,16 +258,45 @@ See also INCOMPATIBLE OPTIONS below. original branch. The index and working tree are also left unchanged as a result. ---keep-empty:: - Keep the commits that do not change anything from its - parents in the result. +--apply: + Use applying strategies to rebase (calling `git-am` + internally). This option may become a no-op in the future + once the merge backend handles everything the apply one does. ++ +See also INCOMPATIBLE OPTIONS below. + +--empty={drop,keep,ask}:: + How to handle commits that are not empty to start and are not + clean cherry-picks of any upstream commit, but which become + empty after rebasing (because they contain a subset of already + upstream changes). With drop (the default), commits that + become empty are dropped. With keep, such commits are kept. + With ask (implied by --interactive), the rebase will halt when + an empty commit is applied allowing you to choose whether to + drop it, edit files more, or just commit the empty changes. + Other options, like --exec, will use the default of drop unless + -i/--interactive is explicitly specified. ++ +Note that commits which start empty are kept, and commits which are +clean cherry-picks (as determined by `git log --cherry-mark ...`) are +always dropped. + See also INCOMPATIBLE OPTIONS below. +--keep-empty:: + No-op. Rebasing commits that started empty (had no change + relative to their parent) used to fail and this option would + override that behavior, allowing commits with empty changes to + be rebased. Now commits with no changes do not cause rebasing + to halt. ++ +See also BEHAVIORAL DIFFERENCES and INCOMPATIBLE OPTIONS below. + --allow-empty-message:: - By default, rebasing commits with an empty message will fail. - This option overrides that behavior, allowing commits with empty - messages to be rebased. + No-op. Rebasing commits with an empty message used to fail + and this option would override that behavior, allowing commits + with empty messages to be rebased. Now commits with an empty + message do not cause rebasing to halt. + See also INCOMPATIBLE OPTIONS below. @@ -286,7 +315,7 @@ See also INCOMPATIBLE OPTIONS below. --merge:: Use merging strategies to rebase. When the recursive (default) merge strategy is used, this allows rebase to be aware of renames on the - upstream side. + upstream side. This is the default. + Note that a rebase merge works by replaying each commit from the working branch on top of the <upstream> branch. Because of this, when a merge @@ -356,7 +385,7 @@ See also INCOMPATIBLE OPTIONS below. Ensure at least <n> lines of surrounding context match before and after each change. When fewer lines of surrounding context exist they all must match. By default no context is - ever ignored. + ever ignored. Implies --apply. + See also INCOMPATIBLE OPTIONS below. @@ -394,8 +423,9 @@ with `--keep-base` in order to drop those commits from your branch. --ignore-whitespace:: --whitespace=<option>:: - These flag are passed to the 'git apply' program + These flags are passed to the 'git apply' program (see linkgit:git-apply[1]) that applies the patch. + Implies --apply. + See also INCOMPATIBLE OPTIONS below. @@ -539,10 +569,11 @@ INCOMPATIBLE OPTIONS The following options: + * --apply * --committer-date-is-author-date * --ignore-date - * --whitespace * --ignore-whitespace + * --whitespace * -C are incompatible with the following options: @@ -557,6 +588,7 @@ are incompatible with the following options: * --interactive * --exec * --keep-empty + * --empty= * --edit-todo * --root when used in combination with --onto @@ -565,33 +597,127 @@ In addition, the following pairs of options are incompatible: * --preserve-merges and --interactive * --preserve-merges and --signoff * --preserve-merges and --rebase-merges + * --preserve-merges and --empty= * --keep-base and --onto * --keep-base and --root BEHAVIORAL DIFFERENCES ----------------------- -There are some subtle differences how the backends behave. +git rebase has two primary backends: apply and merge. (The apply +backend used to known as the 'am' backend, but the name led to +confusion as it looks like a verb instead of a noun. Also, the merge +backend used to be known as the interactive backend, but it is now +used for non-interactive cases as well. Both were renamed based on +lower-level functionality that underpinned each.) There are some +subtle differences in how these two backends behave: Empty commits ~~~~~~~~~~~~~ -The am backend drops any "empty" commits, regardless of whether the -commit started empty (had no changes relative to its parent to -start with) or ended empty (all changes were already applied -upstream in other commits). +The apply backend unfortunately drops intentionally empty commits, i.e. +commits that started empty, though these are rare in practice. It +also drops commits that become empty and has no option for controlling +this behavior. -The interactive backend drops commits by default that -started empty and halts if it hits a commit that ended up empty. -The `--keep-empty` option exists for the interactive backend to allow -it to keep commits that started empty. +The merge backend keeps intentionally empty commits. Similar to the +apply backend, by default the merge backend drops commits that become +empty unless -i/--interactive is specified (in which case it stops and +asks the user what to do). The merge backend also has an +--empty={drop,keep,ask} option for changing the behavior of handling +commits that become empty. Directory rename detection ~~~~~~~~~~~~~~~~~~~~~~~~~~ -Directory rename heuristics are enabled in the merge and interactive -backends. Due to the lack of accurate tree information, directory -rename detection is disabled in the am backend. +Due to the lack of accurate tree information (arising from +constructing fake ancestors with the limited information available in +patches), directory rename detection is disabled in the apply backend. +Disabled directory rename detection means that if one side of history +renames a directory and the other adds new files to the old directory, +then the new files will be left behind in the old directory without +any warning at the time of rebasing that you may want to move these +files into the new directory. + +Directory rename detection works with the merge backend to provide you +warnings in such cases. + +Context +~~~~~~~ + +The apply backend works by creating a sequence of patches (by calling +`format-patch` internally), and then applying the patches in sequence +(calling `am` internally). Patches are composed of multiple hunks, +each with line numbers, a context region, and the actual changes. The +line numbers have to be taken with some fuzz, since the other side +will likely have inserted or deleted lines earlier in the file. The +context region is meant to help find how to adjust the line numbers in +order to apply the changes to the right lines. However, if multiple +areas of the code have the same surrounding lines of context, the +wrong one can be picked. There are real-world cases where this has +caused commits to be reapplied incorrectly with no conflicts reported. +Setting diff.context to a larger value may prevent such types of +problems, but increases the chance of spurious conflicts (since it +will require more lines of matching context to apply). + +The merge backend works with a full copy of each relevant file, +insulating it from these types of problems. + +Labelling of conflicts markers +~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + +When there are content conflicts, the merge machinery tries to +annotate each side's conflict markers with the commits where the +content came from. Since the apply backend drops the original +information about the rebased commits and their parents (and instead +generates new fake commits based off limited information in the +generated patches), those commits cannot be identified; instead it has +to fall back to a commit summary. Also, when merge.conflictStyle is +set to diff3, the apply backend will use "constructed merge base" to +label the content from the merge base, and thus provide no information +about the merge base commit whatsoever. + +The merge backend works with the full commits on both sides of history +and thus has no such limitations. + +Hooks +~~~~~ + +The apply backend has not traditionally called the post-commit hook, +while the merge backend has. However, this was by accident of +implementation rather than by design. Both backends should have the +same behavior, though it is not clear which one is correct. + +Interruptability +~~~~~~~~~~~~~~~~ + +The apply backend has safety problems with an ill-timed interrupt; if +the user presses Ctrl-C at the wrong time to try to abort the rebase, +the rebase can enter a state where it cannot be aborted with a +subsequent `git rebase --abort`. The merge backend does not appear to +suffer from the same shortcoming. (See +https://lore.kernel.org/git/20200207132152.GC2868@szeder.dev/ for +details.) + +Miscellaneous differences +~~~~~~~~~~~~~~~~~~~~~~~~~ + +There are a few more behavioral differences that most folks would +probably consider inconsequential but which are mentioned for +completeness: + +* Reflog: The two backends will use different wording when describing + the changes made in the reflog, though both will make use of the + word "rebase". + +* Progress, informational, and error messages: The two backends + provide slightly different progress and informational messages. + Also, the apply backend writes error messages (such as "Your files + would be overwritten...") to stdout, while the merge backend writes + them to stderr. + +* State directories: The two backends keep their state in different + directories under .git/ include::merge-strategies.txt[] diff --git a/builtin/rebase.c b/builtin/rebase.c index 6154ad8fa5..ffa467aad5 100644 --- a/builtin/rebase.c +++ b/builtin/rebase.c @@ -44,14 +44,22 @@ static GIT_PATH_FUNC(merge_dir, "rebase-merge") enum rebase_type { REBASE_UNSPECIFIED = -1, - REBASE_AM, + REBASE_APPLY, REBASE_MERGE, - REBASE_INTERACTIVE, REBASE_PRESERVE_MERGES }; +enum empty_type { + EMPTY_UNSPECIFIED = -1, + EMPTY_DROP, + EMPTY_KEEP, + EMPTY_ASK +}; + struct rebase_options { enum rebase_type type; + enum empty_type empty; + const char *default_backend; const char *state_dir; struct commit *upstream; const char *upstream_name; @@ -77,7 +85,6 @@ struct rebase_options { const char *action; int signoff; int allow_rerere_autoupdate; - int keep_empty; int autosquash; char *gpg_sign_opt; int autostash; @@ -92,6 +99,8 @@ struct rebase_options { #define REBASE_OPTIONS_INIT { \ .type = REBASE_UNSPECIFIED, \ + .empty = EMPTY_UNSPECIFIED, \ + .default_backend = "merge", \ .flags = REBASE_NO_QUIET, \ .git_am_opts = ARGV_ARRAY_INIT, \ .git_format_patch_opt = STRBUF_INIT \ @@ -110,6 +119,9 @@ static struct replay_opts get_replay_opts(const struct rebase_options *opts) replay.allow_rerere_auto = opts->allow_rerere_autoupdate; replay.allow_empty = 1; replay.allow_empty_message = opts->allow_empty_message; + replay.drop_redundant_commits = (opts->empty == EMPTY_DROP); + replay.keep_redundant_commits = (opts->empty == EMPTY_KEEP); + replay.quiet = !(opts->flags & REBASE_NO_QUIET); replay.verbose = opts->flags & REBASE_VERBOSE; replay.reschedule_failed_exec = opts->reschedule_failed_exec; replay.gpg_sign = xstrdup_or_null(opts->gpg_sign_opt); @@ -329,8 +341,8 @@ static int do_interactive_rebase(struct rebase_options *opts, unsigned flags) argv_array_pushl(&make_script_args, "", revisions, NULL); if (opts->restrict_revision) - argv_array_push(&make_script_args, - oid_to_hex(&opts->restrict_revision->object.oid)); + argv_array_pushf(&make_script_args, "^%s", + oid_to_hex(&opts->restrict_revision->object.oid)); ret = sequencer_make_script(the_repository, &todo_list.buf, make_script_args.argc, make_script_args.argv, @@ -359,7 +371,7 @@ static int do_interactive_rebase(struct rebase_options *opts, unsigned flags) return ret; } -static int run_rebase_interactive(struct rebase_options *opts, +static int run_sequencer_rebase(struct rebase_options *opts, enum action command) { unsigned flags = 0; @@ -367,7 +379,6 @@ static int run_rebase_interactive(struct rebase_options *opts, git_config_get_bool("rebase.abbreviatecommands", &abbreviate_commands); - flags |= opts->keep_empty ? TODO_LIST_KEEP_EMPTY : 0; flags |= abbreviate_commands ? TODO_LIST_ABBREVIATE_CMDS : 0; flags |= opts->rebase_merges ? TODO_LIST_REBASE_MERGES : 0; flags |= opts->rebase_cousins > 0 ? TODO_LIST_REBASE_COUSINS : 0; @@ -431,6 +442,21 @@ static int run_rebase_interactive(struct rebase_options *opts, return ret; } +static int parse_opt_keep_empty(const struct option *opt, const char *arg, + int unset) +{ + struct rebase_options *opts = opt->value; + + BUG_ON_OPT_ARG(arg); + + /* + * If we ever want to remap --keep-empty to --empty=keep, insert: + * opts->empty = unset ? EMPTY_UNSPECIFIED : EMPTY_KEEP; + */ + opts->type = REBASE_MERGE; + return 0; +} + static const char * const builtin_rebase_interactive_usage[] = { N_("git rebase--interactive [<options>]"), NULL @@ -444,9 +470,13 @@ int cmd_rebase__interactive(int argc, const char **argv, const char *prefix) struct option options[] = { OPT_NEGBIT(0, "ff", &opts.flags, N_("allow fast-forward"), REBASE_FORCE), - OPT_BOOL(0, "keep-empty", &opts.keep_empty, N_("keep empty commits")), - OPT_BOOL(0, "allow-empty-message", &opts.allow_empty_message, - N_("allow commits with empty messages")), + { OPTION_CALLBACK, 'k', "keep-empty", &options, NULL, + N_("(DEPRECATED) keep empty commits"), + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, + parse_opt_keep_empty }, + OPT_BOOL_F(0, "allow-empty-message", &opts.allow_empty_message, + N_("allow commits with empty messages"), + PARSE_OPT_HIDDEN), OPT_BOOL(0, "rebase-merges", &opts.rebase_merges, N_("rebase merge commits")), OPT_BOOL(0, "rebase-cousins", &opts.rebase_cousins, N_("keep original branch points of cousins")), @@ -516,28 +546,26 @@ int cmd_rebase__interactive(int argc, const char **argv, const char *prefix) warning(_("--[no-]rebase-cousins has no effect without " "--rebase-merges")); - return !!run_rebase_interactive(&opts, command); + return !!run_sequencer_rebase(&opts, command); } -static int is_interactive(struct rebase_options *opts) +static int is_merge(struct rebase_options *opts) { - return opts->type == REBASE_INTERACTIVE || + return opts->type == REBASE_MERGE || opts->type == REBASE_PRESERVE_MERGES; } -static void imply_interactive(struct rebase_options *opts, const char *option) +static void imply_merge(struct rebase_options *opts, const char *option) { switch (opts->type) { - case REBASE_AM: + case REBASE_APPLY: die(_("%s requires an interactive rebase"), option); break; - case REBASE_INTERACTIVE: + case REBASE_MERGE: case REBASE_PRESERVE_MERGES: break; - case REBASE_MERGE: - /* we now implement --merge via --interactive */ default: - opts->type = REBASE_INTERACTIVE; /* implied */ + opts->type = REBASE_MERGE; /* implied */ break; } } @@ -663,8 +691,8 @@ static int rebase_write_basic_state(struct rebase_options *opts) opts->onto ? oid_to_hex(&opts->onto->object.oid) : ""); write_file(state_dir_path("orig-head", opts), "%s", oid_to_hex(&opts->orig_head)); - write_file(state_dir_path("quiet", opts), "%s", - opts->flags & REBASE_NO_QUIET ? "" : "t"); + if (!(opts->flags & REBASE_NO_QUIET)) + write_file(state_dir_path("quiet", opts), "%s", ""); if (opts->flags & REBASE_VERBOSE) write_file(state_dir_path("verbose", opts), "%s", ""); if (opts->strategy) @@ -746,7 +774,7 @@ static int finish_rebase(struct rebase_options *opts) * user should see them. */ run_command_v_opt(argv_gc_auto, RUN_GIT_CMD); - if (opts->type == REBASE_INTERACTIVE) { + if (opts->type == REBASE_MERGE) { struct replay_opts replay = REPLAY_OPTS_INIT; replay.action = REPLAY_INTERACTIVE_REBASE; @@ -1079,8 +1107,8 @@ static int run_specific_rebase(struct rebase_options *opts, enum action action) int status; const char *backend, *backend_func; - if (opts->type == REBASE_INTERACTIVE) { - /* Run builtin interactive rebase */ + if (opts->type == REBASE_MERGE) { + /* Run sequencer-based rebase */ setenv("GIT_CHERRY_PICK_HELP", resolvemsg, 1); if (!(opts->flags & REBASE_INTERACTIVE_EXPLICIT)) { setenv("GIT_SEQUENCE_EDITOR", ":", 1); @@ -1093,11 +1121,11 @@ static int run_specific_rebase(struct rebase_options *opts, enum action action) opts->gpg_sign_opt = tmp; } - status = run_rebase_interactive(opts, action); + status = run_sequencer_rebase(opts, action); goto finished_rebase; } - if (opts->type == REBASE_AM) { + if (opts->type == REBASE_APPLY) { status = run_am(opts); goto finished_rebase; } @@ -1117,8 +1145,6 @@ static int run_specific_rebase(struct rebase_options *opts, enum action action) add_var(&script_snippet, "revisions", opts->revisions); add_var(&script_snippet, "restrict_revision", opts->restrict_revision ? oid_to_hex(&opts->restrict_revision->object.oid) : NULL); - add_var(&script_snippet, "GIT_QUIET", - opts->flags & REBASE_NO_QUIET ? "" : "t"); sq_quote_argv_pretty(&buf, opts->git_am_opts.argv); add_var(&script_snippet, "git_am_opt", buf.buf); strbuf_release(&buf); @@ -1136,7 +1162,6 @@ static int run_specific_rebase(struct rebase_options *opts, enum action action) opts->allow_rerere_autoupdate ? opts->allow_rerere_autoupdate == RERERE_AUTOUPDATE ? "--rerere-autoupdate" : "--no-rerere-autoupdate" : ""); - add_var(&script_snippet, "keep_empty", opts->keep_empty ? "yes" : ""); add_var(&script_snippet, "autosquash", opts->autosquash ? "t" : ""); add_var(&script_snippet, "gpg_sign_opt", opts->gpg_sign_opt); add_var(&script_snippet, "cmd", opts->cmd); @@ -1154,7 +1179,7 @@ static int run_specific_rebase(struct rebase_options *opts, enum action action) add_var(&script_snippet, "git_format_patch_opt", opts->git_format_patch_opt.buf); - if (is_interactive(opts) && + if (is_merge(opts) && !(opts->flags & REBASE_INTERACTIVE_EXPLICIT)) { strbuf_addstr(&script_snippet, "GIT_SEQUENCE_EDITOR=:; export GIT_SEQUENCE_EDITOR; "); @@ -1179,8 +1204,8 @@ static int run_specific_rebase(struct rebase_options *opts, enum action action) finished_rebase: if (opts->dont_finish_rebase) ; /* do nothing */ - else if (opts->type == REBASE_INTERACTIVE) - ; /* interactive rebase cleans up after itself */ + else if (opts->type == REBASE_MERGE) + ; /* merge backend cleans up after itself */ else if (status == 0) { if (!file_exists(state_dir_path("stopped-sha", opts))) finish_rebase(opts); @@ -1238,6 +1263,10 @@ static int rebase_config(const char *var, const char *value, void *data) return 0; } + if (!strcmp(var, "rebase.backend")) { + return git_config_string(&opts->default_backend, var, value); + } + return git_default_config(var, value, data); } @@ -1301,6 +1330,18 @@ done: return res && is_linear_history(onto, head); } +static int parse_opt_am(const struct option *opt, const char *arg, int unset) +{ + struct rebase_options *opts = opt->value; + + BUG_ON_OPT_NEG(unset); + BUG_ON_OPT_ARG(arg); + + opts->type = REBASE_APPLY; + + return 0; +} + /* -i followed by -m is still -i */ static int parse_opt_merge(const struct option *opt, const char *arg, int unset) { @@ -1309,7 +1350,7 @@ static int parse_opt_merge(const struct option *opt, const char *arg, int unset) BUG_ON_OPT_NEG(unset); BUG_ON_OPT_ARG(arg); - if (!is_interactive(opts)) + if (!is_merge(opts)) opts->type = REBASE_MERGE; return 0; @@ -1324,12 +1365,35 @@ static int parse_opt_interactive(const struct option *opt, const char *arg, BUG_ON_OPT_NEG(unset); BUG_ON_OPT_ARG(arg); - opts->type = REBASE_INTERACTIVE; + opts->type = REBASE_MERGE; opts->flags |= REBASE_INTERACTIVE_EXPLICIT; return 0; } +static enum empty_type parse_empty_value(const char *value) +{ + if (!strcasecmp(value, "drop")) + return EMPTY_DROP; + else if (!strcasecmp(value, "keep")) + return EMPTY_KEEP; + else if (!strcasecmp(value, "ask")) + return EMPTY_ASK; + + die(_("unrecognized empty type '%s'; valid values are \"drop\", \"keep\", and \"ask\"."), value); +} + +static int parse_opt_empty(const struct option *opt, const char *arg, int unset) +{ + struct rebase_options *options = opt->value; + enum empty_type value = parse_empty_value(arg); + + BUG_ON_OPT_NEG(unset); + + options->empty = value; + return 0; +} + static void NORETURN error_on_missing_default_upstream(void) { struct branch *current_branch = branch_get(NULL); @@ -1365,14 +1429,14 @@ static void set_reflog_action(struct rebase_options *options) const char *env; struct strbuf buf = STRBUF_INIT; - if (!is_interactive(options)) + if (!is_merge(options)) return; env = getenv(GIT_REFLOG_ACTION_ENVIRONMENT); if (env && strcmp("rebase", env)) return; /* only override it if it is "rebase" */ - strbuf_addf(&buf, "rebase -i (%s)", options->action); + strbuf_addf(&buf, "rebase (%s)", options->action); setenv(GIT_REFLOG_ACTION_ENVIRONMENT, buf.buf, 1); strbuf_release(&buf); } @@ -1410,6 +1474,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) struct object_id squash_onto; char *squash_onto_name = NULL; int reschedule_failed_exec = -1; + int allow_preemptive_ff = 1; struct option builtin_rebase_options[] = { OPT_STRING(0, "onto", &options.onto_name, N_("revision"), @@ -1420,7 +1485,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) N_("allow pre-rebase hook to run")), OPT_NEGBIT('q', "quiet", &options.flags, N_("be quiet. implies --no-stat"), - REBASE_NO_QUIET| REBASE_VERBOSE | REBASE_DIFFSTAT), + REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT), OPT_BIT('v', "verbose", &options.flags, N_("display a diffstat of what changed upstream"), REBASE_NO_QUIET | REBASE_VERBOSE | REBASE_DIFFSTAT), @@ -1461,6 +1526,10 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) OPT_CMDMODE(0, "show-current-patch", &action, N_("show the patch file being applied or merged"), ACTION_SHOW_CURRENT_PATCH), + { OPTION_CALLBACK, 0, "apply", &options, NULL, + N_("use apply strategies to rebase"), + PARSE_OPT_NOARG | PARSE_OPT_NONEG, + parse_opt_am }, { OPTION_CALLBACK, 'm', "merge", &options, NULL, N_("use merging strategies to rebase"), PARSE_OPT_NOARG | PARSE_OPT_NONEG, @@ -1474,8 +1543,13 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) "ignoring them"), REBASE_PRESERVE_MERGES, PARSE_OPT_HIDDEN), OPT_RERERE_AUTOUPDATE(&options.allow_rerere_autoupdate), - OPT_BOOL('k', "keep-empty", &options.keep_empty, - N_("preserve empty commits during rebase")), + OPT_CALLBACK_F(0, "empty", &options, N_("{drop,keep,ask}"), + N_("how to handle commits that become empty"), + PARSE_OPT_NONEG, parse_opt_empty), + { OPTION_CALLBACK, 'k', "keep-empty", &options, NULL, + N_("(DEPRECATED) keep empty commits"), + PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, + parse_opt_keep_empty }, OPT_BOOL(0, "autosquash", &options.autosquash, N_("move commits that begin with " "squash!/fixup! under -i")), @@ -1487,9 +1561,10 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) OPT_STRING_LIST('x', "exec", &exec, N_("exec"), N_("add exec lines after each commit of the " "editable list")), - OPT_BOOL(0, "allow-empty-message", - &options.allow_empty_message, - N_("allow rebasing commits with empty messages")), + OPT_BOOL_F(0, "allow-empty-message", + &options.allow_empty_message, + N_("allow rebasing commits with empty messages"), + PARSE_OPT_HIDDEN), {OPTION_STRING, 'r', "rebase-merges", &rebase_merges, N_("mode"), N_("try to rebase merges instead of skipping them"), @@ -1529,7 +1604,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) die(_("It looks like 'git am' is in progress. Cannot rebase.")); if (is_directory(apply_dir())) { - options.type = REBASE_AM; + options.type = REBASE_APPLY; options.state_dir = apply_dir(); } else if (is_directory(merge_dir())) { strbuf_reset(&buf); @@ -1541,7 +1616,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) strbuf_reset(&buf); strbuf_addf(&buf, "%s/interactive", merge_dir()); if(file_exists(buf.buf)) { - options.type = REBASE_INTERACTIVE; + options.type = REBASE_MERGE; options.flags |= REBASE_INTERACTIVE_EXPLICIT; } else options.type = REBASE_MERGE; @@ -1581,12 +1656,12 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) die(_("No rebase in progress?")); setenv(GIT_REFLOG_ACTION_ENVIRONMENT, "rebase", 0); - if (action == ACTION_EDIT_TODO && !is_interactive(&options)) + if (action == ACTION_EDIT_TODO && !is_merge(&options)) die(_("The --edit-todo action can only be used during " "interactive rebase.")); if (trace2_is_enabled()) { - if (is_interactive(&options)) + if (is_merge(&options)) trace2_cmd_mode("interactive"); else if (exec.nr) trace2_cmd_mode("interactive-exec"); @@ -1662,7 +1737,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) goto cleanup; } case ACTION_QUIT: { - if (options.type == REBASE_INTERACTIVE) { + if (options.type == REBASE_MERGE) { struct replay_opts replay = REPLAY_OPTS_INIT; replay.action = REPLAY_INTERACTIVE_REBASE; @@ -1711,13 +1786,20 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) state_dir_base, cmd_live_rebase, buf.buf); } + if ((options.flags & REBASE_INTERACTIVE_EXPLICIT) || + (action != ACTION_NONE) || + (exec.nr > 0) || + options.autosquash) { + allow_preemptive_ff = 0; + } + for (i = 0; i < options.git_am_opts.argc; i++) { const char *option = options.git_am_opts.argv[i], *p; if (!strcmp(option, "--committer-date-is-author-date") || !strcmp(option, "--ignore-date") || !strcmp(option, "--whitespace=fix") || !strcmp(option, "--whitespace=strip")) - options.flags |= REBASE_FORCE; + allow_preemptive_ff = 0; else if (skip_prefix(option, "-C", &p)) { while (*p) if (!isdigit(*(p++))) @@ -1737,8 +1819,8 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) if (!(options.flags & REBASE_NO_QUIET)) argv_array_push(&options.git_am_opts, "-q"); - if (options.keep_empty) - imply_interactive(&options, "--keep-empty"); + if (options.empty != EMPTY_UNSPECIFIED) + imply_merge(&options, "--empty"); if (gpg_sign) { free(options.gpg_sign_opt); @@ -1748,7 +1830,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) if (exec.nr) { int i; - imply_interactive(&options, "--exec"); + imply_merge(&options, "--exec"); strbuf_reset(&buf); for (i = 0; i < exec.nr; i++) @@ -1764,7 +1846,7 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) else if (strcmp("no-rebase-cousins", rebase_merges)) die(_("Unknown mode: %s"), rebase_merges); options.rebase_merges = 1; - imply_interactive(&options, "--rebase-merges"); + imply_merge(&options, "--rebase-merges"); } if (strategy_options.nr) { @@ -1783,10 +1865,9 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) if (options.strategy) { options.strategy = xstrdup(options.strategy); switch (options.type) { - case REBASE_AM: + case REBASE_APPLY: die(_("--strategy requires --merge or --interactive")); case REBASE_MERGE: - case REBASE_INTERACTIVE: case REBASE_PRESERVE_MERGES: /* compatible */ break; @@ -1799,47 +1880,65 @@ int cmd_rebase(int argc, const char **argv, const char *prefix) } if (options.type == REBASE_MERGE) - imply_interactive(&options, "--merge"); + imply_merge(&options, "--merge"); if (options.root && !options.onto_name) - imply_interactive(&options, "--root without --onto"); + imply_merge(&options, "--root without --onto"); if (isatty(2) && options.flags & REBASE_NO_QUIET) strbuf_addstr(&options.git_format_patch_opt, " --progress"); + if (options.git_am_opts.argc || options.type == REBASE_APPLY) { + /* all am options except -q are compatible only with --apply */ + for (i = options.git_am_opts.argc - 1; i >= 0; i--) + if (strcmp(options.git_am_opts.argv[i], "-q")) + break; + + if (i >= 0) { + if (is_merge(&options)) + die(_("cannot combine apply options with " + "merge options")); + else + options.type = REBASE_APPLY; + } + } + + if (options.type == REBASE_UNSPECIFIED) { + if (!strcmp(options.default_backend, "merge")) + imply_merge(&options, "--merge"); + else if (!strcmp(options.default_backend, "apply")) + options.type = REBASE_APPLY; + else + die(_("Unknown rebase backend: %s"), + options.default_backend); + } + switch (options.type) { case REBASE_MERGE: - case REBASE_INTERACTIVE: case REBASE_PRESERVE_MERGES: options.state_dir = merge_dir(); break; - case REBASE_AM: + case REBASE_APPLY: options.state_dir = apply_dir(); break; default: - /* the default rebase backend is `--am` */ - options.type = REBASE_AM; - options.state_dir = apply_dir(); - break; + BUG("options.type was just set above; should be unreachable."); } - if (reschedule_failed_exec > 0 && !is_interactive(&options)) + if (options.empty == EMPTY_UNSPECIFIED) { + if (options.flags & REBASE_INTERACTIVE_EXPLICIT) + options.empty = EMPTY_ASK; + else if (exec.nr > 0) + options.empty = EMPTY_KEEP; + else + options.empty = EMPTY_DROP; + } + if (reschedule_failed_exec > 0 && !is_merge(&options)) die(_("--reschedule-failed-exec requires " "--exec or --interactive")); if (reschedule_failed_exec >= 0) options.reschedule_failed_exec = reschedule_failed_exec; - if (options.git_am_opts.argc) { - /* all am options except -q are compatible only with --am */ |