X-Git-Url: https://git.tokkee.org/?a=blobdiff_plain;f=builtin%2Frevert.c;h=3ad14a1f98716cca4ddcfe9f8cbe8054409cde02;hb=23cb5bf3b3b9699bf00fa38c4c08f32f8c60b529;hp=544e8c3057b2faf120dcfb219c6f8bcc4dec4b0a;hpb=4c00c852b3f2596f246811ca933eef357183581b;p=git.git diff --git a/builtin/revert.c b/builtin/revert.c index 544e8c305..3ad14a1f9 100644 --- a/builtin/revert.c +++ b/builtin/revert.c @@ -40,7 +40,12 @@ static const char * const cherry_pick_usage[] = { }; enum replay_action { REVERT, CHERRY_PICK }; -enum replay_subcommand { REPLAY_NONE, REPLAY_RESET, REPLAY_CONTINUE }; +enum replay_subcommand { + REPLAY_NONE, + REPLAY_REMOVE_STATE, + REPLAY_CONTINUE, + REPLAY_ROLLBACK +}; struct replay_opts { enum replay_action action; @@ -133,11 +138,13 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts) { const char * const * usage_str = revert_or_cherry_pick_usage(opts); const char *me = action_name(opts); - int reset = 0; + int remove_state = 0; int contin = 0; + int rollback = 0; struct option options[] = { - OPT_BOOLEAN(0, "reset", &reset, "forget the current operation"), - OPT_BOOLEAN(0, "continue", &contin, "continue the current operation"), + OPT_BOOLEAN(0, "quit", &remove_state, "end revert or cherry-pick sequence"), + OPT_BOOLEAN(0, "continue", &contin, "resume revert or cherry-pick sequence"), + OPT_BOOLEAN(0, "abort", &rollback, "cancel revert or cherry-pick sequence"), OPT_BOOLEAN('n', "no-commit", &opts->no_commit, "don't automatically commit"), OPT_BOOLEAN('e', "edit", &opts->edit, "edit the commit message"), OPT_NOOP_NOARG('r', NULL), @@ -168,25 +175,32 @@ static void parse_args(int argc, const char **argv, struct replay_opts *opts) /* Check for incompatible subcommands */ verify_opt_mutually_compatible(me, - "--reset", reset, + "--quit", remove_state, "--continue", contin, + "--abort", rollback, NULL); /* Set the subcommand */ - if (reset) - opts->subcommand = REPLAY_RESET; + if (remove_state) + opts->subcommand = REPLAY_REMOVE_STATE; else if (contin) opts->subcommand = REPLAY_CONTINUE; + else if (rollback) + opts->subcommand = REPLAY_ROLLBACK; else opts->subcommand = REPLAY_NONE; /* Check for incompatible command line arguments */ if (opts->subcommand != REPLAY_NONE) { char *this_operation; - if (opts->subcommand == REPLAY_RESET) - this_operation = "--reset"; - else + if (opts->subcommand == REPLAY_REMOVE_STATE) + this_operation = "--quit"; + else if (opts->subcommand == REPLAY_CONTINUE) this_operation = "--continue"; + else { + assert(opts->subcommand == REPLAY_ROLLBACK); + this_operation = "--abort"; + } verify_opt_compatible(me, this_operation, "--no-commit", opts->no_commit, @@ -286,7 +300,7 @@ static char *get_encoding(const char *message) return NULL; } -static void write_cherry_pick_head(struct commit *commit) +static void write_cherry_pick_head(struct commit *commit, const char *pseudoref) { const char *filename; int fd; @@ -294,7 +308,7 @@ static void write_cherry_pick_head(struct commit *commit) strbuf_addf(&buf, "%s\n", sha1_to_hex(commit->object.sha1)); - filename = git_path("CHERRY_PICK_HEAD"); + filename = git_path("%s", pseudoref); fd = open(filename, O_WRONLY | O_CREAT, 0666); if (fd < 0) die_errno(_("Could not open '%s' for writing"), filename); @@ -318,11 +332,10 @@ static void print_advice(int show_hint) return; } - if (show_hint) { - advise("after resolving the conflicts, mark the corrected paths"); - advise("with 'git add ' or 'git rm '"); - advise("and commit the result with 'git commit'"); - } + if (show_hint) + advise(_("after resolving the conflicts, mark the corrected paths\n" + "with 'git add ' or 'git rm '\n" + "and commit the result with 'git commit'")); } static void write_message(struct strbuf *msgbuf, const char *filename) @@ -594,7 +607,9 @@ static int do_pick_commit(struct commit *commit, struct replay_opts *opts) * write it at all. */ if (opts->action == CHERRY_PICK && !opts->no_commit && (res == 0 || res == 1)) - write_cherry_pick_head(commit); + write_cherry_pick_head(commit, "CHERRY_PICK_HEAD"); + if (opts->action == REVERT && ((opts->no_commit && res == 0) || res == 1)) + write_cherry_pick_head(commit, "REVERT_HEAD"); if (res) { error(opts->action == REVERT @@ -843,8 +858,11 @@ static int create_seq_dir(void) { const char *seq_dir = git_path(SEQ_DIR); - if (file_exists(seq_dir)) - return error(_("%s already exists."), seq_dir); + if (file_exists(seq_dir)) { + error(_("a cherry-pick or revert is already in progress")); + advise(_("try \"git cherry-pick (--continue | --quit | --abort)\"")); + return -1; + } else if (mkdir(seq_dir, 0777) < 0) die_errno(_("Could not create sequencer directory %s"), seq_dir); return 0; @@ -865,6 +883,72 @@ static void save_head(const char *head) die(_("Error wrapping up %s."), head_file); } +static int reset_for_rollback(const unsigned char *sha1) +{ + const char *argv[4]; /* reset --merge + NULL */ + argv[0] = "reset"; + argv[1] = "--merge"; + argv[2] = sha1_to_hex(sha1); + argv[3] = NULL; + return run_command_v_opt(argv, RUN_GIT_CMD); +} + +static int rollback_single_pick(void) +{ + unsigned char head_sha1[20]; + + if (!file_exists(git_path("CHERRY_PICK_HEAD")) && + !file_exists(git_path("REVERT_HEAD"))) + return error(_("no cherry-pick or revert in progress")); + if (!resolve_ref("HEAD", head_sha1, 0, NULL)) + return error(_("cannot resolve HEAD")); + if (is_null_sha1(head_sha1)) + return error(_("cannot abort from a branch yet to be born")); + return reset_for_rollback(head_sha1); +} + +static int sequencer_rollback(struct replay_opts *opts) +{ + const char *filename; + FILE *f; + unsigned char sha1[20]; + struct strbuf buf = STRBUF_INIT; + + filename = git_path(SEQ_HEAD_FILE); + f = fopen(filename, "r"); + if (!f && errno == ENOENT) { + /* + * There is no multiple-cherry-pick in progress. + * If CHERRY_PICK_HEAD or REVERT_HEAD indicates + * a single-cherry-pick in progress, abort that. + */ + return rollback_single_pick(); + } + if (!f) + return error(_("cannot open %s: %s"), filename, + strerror(errno)); + if (strbuf_getline(&buf, f, '\n')) { + error(_("cannot read %s: %s"), filename, ferror(f) ? + strerror(errno) : _("unexpected end of file")); + fclose(f); + goto fail; + } + fclose(f); + if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') { + error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"), + filename); + goto fail; + } + if (reset_for_rollback(sha1)) + goto fail; + remove_sequencer_state(1); + strbuf_release(&buf); + return 0; +fail: + strbuf_release(&buf); + return -1; +} + static void save_todo(struct commit_list *todo_list, struct replay_opts *opts) { const char *todo_file = git_path(SEQ_TODO_FILE); @@ -965,43 +1049,41 @@ static int pick_revisions(struct replay_opts *opts) * cherry-pick should be handled differently from an existing * one that is being continued */ - if (opts->subcommand == REPLAY_RESET) { + if (opts->subcommand == REPLAY_REMOVE_STATE) { remove_sequencer_state(1); return 0; - } else if (opts->subcommand == REPLAY_CONTINUE) { + } + if (opts->subcommand == REPLAY_ROLLBACK) + return sequencer_rollback(opts); + if (opts->subcommand == REPLAY_CONTINUE) { if (!file_exists(git_path(SEQ_TODO_FILE))) - goto error; + return error(_("No %s in progress"), action_name(opts)); read_populate_opts(&opts); read_populate_todo(&todo_list, opts); /* Verify that the conflict has been resolved */ if (!index_differs_from("HEAD", 0)) todo_list = todo_list->next; - } else { - /* - * Start a new cherry-pick/ revert sequence; but - * first, make sure that an existing one isn't in - * progress - */ + return pick_commits(todo_list, opts); + } - walk_revs_populate_todo(&todo_list, opts); - if (create_seq_dir() < 0) { - error(_("A cherry-pick or revert is in progress.")); - advise(_("Use --continue to continue the operation")); - advise(_("or --reset to forget about it")); - return -1; - } - if (get_sha1("HEAD", sha1)) { - if (opts->action == REVERT) - return error(_("Can't revert as initial commit")); - return error(_("Can't cherry-pick into empty head")); - } - save_head(sha1_to_hex(sha1)); - save_opts(opts); + /* + * Start a new cherry-pick/ revert sequence; but + * first, make sure that an existing one isn't in + * progress + */ + + walk_revs_populate_todo(&todo_list, opts); + if (create_seq_dir() < 0) + return -1; + if (get_sha1("HEAD", sha1)) { + if (opts->action == REVERT) + return error(_("Can't revert as initial commit")); + return error(_("Can't cherry-pick into empty head")); } + save_head(sha1_to_hex(sha1)); + save_opts(opts); return pick_commits(todo_list, opts); -error: - return error(_("No %s in progress"), action_name(opts)); } int cmd_revert(int argc, const char **argv, const char *prefix)