diff options
Diffstat (limited to 'rebase-interactive.c')
| -rw-r--r-- | rebase-interactive.c | 237 |
1 files changed, 237 insertions, 0 deletions
diff --git a/rebase-interactive.c b/rebase-interactive.c new file mode 100644 index 0000000..7407c59 --- /dev/null +++ b/rebase-interactive.c @@ -0,0 +1,237 @@ +#include "cache.h" +#include "commit.h" +#include "sequencer.h" +#include "rebase-interactive.h" +#include "strbuf.h" +#include "commit-slab.h" +#include "config.h" +#include "dir.h" + +static const char edit_todo_list_advice[] = +N_("You can fix this with 'git rebase --edit-todo' " +"and then run 'git rebase --continue'.\n" +"Or you can abort the rebase with 'git rebase" +" --abort'.\n"); + +enum missing_commit_check_level { + MISSING_COMMIT_CHECK_IGNORE = 0, + MISSING_COMMIT_CHECK_WARN, + MISSING_COMMIT_CHECK_ERROR +}; + +static enum missing_commit_check_level get_missing_commit_check_level(void) +{ + const char *value; + + if (git_config_get_value("rebase.missingcommitscheck", &value) || + !strcasecmp("ignore", value)) + return MISSING_COMMIT_CHECK_IGNORE; + if (!strcasecmp("warn", value)) + return MISSING_COMMIT_CHECK_WARN; + if (!strcasecmp("error", value)) + return MISSING_COMMIT_CHECK_ERROR; + warning(_("unrecognized setting %s for option " + "rebase.missingCommitsCheck. Ignoring."), value); + return MISSING_COMMIT_CHECK_IGNORE; +} + +void append_todo_help(int command_count, + const char *shortrevisions, const char *shortonto, + struct strbuf *buf) +{ + const char *msg = _("\nCommands:\n" +"p, pick <commit> = use commit\n" +"r, reword <commit> = use commit, but edit the commit message\n" +"e, edit <commit> = use commit, but stop for amending\n" +"s, squash <commit> = use commit, but meld into previous commit\n" +"f, fixup [-C | -c] <commit> = like \"squash\" but keep only the previous\n" +" commit's log message, unless -C is used, in which case\n" +" keep only this commit's message; -c is same as -C but\n" +" opens the editor\n" +"x, exec <command> = run command (the rest of the line) using shell\n" +"b, break = stop here (continue rebase later with 'git rebase --continue')\n" +"d, drop <commit> = remove commit\n" +"l, label <label> = label current HEAD with a name\n" +"t, reset <label> = reset HEAD to a label\n" +"m, merge [-C <commit> | -c <commit>] <label> [# <oneline>]\n" +" create a merge commit using the original merge commit's\n" +" message (or the oneline, if no original merge commit was\n" +" specified); use -c <commit> to reword the commit message\n" +"u, update-ref <ref> = track a placeholder for the <ref> to be updated\n" +" to this position in the new commits. The <ref> is\n" +" updated at the end of the rebase\n" +"\n" +"These lines can be re-ordered; they are executed from top to bottom.\n"); + unsigned edit_todo = !(shortrevisions && shortonto); + + if (!edit_todo) { + strbuf_addch(buf, '\n'); + strbuf_commented_addf(buf, Q_("Rebase %s onto %s (%d command)", + "Rebase %s onto %s (%d commands)", + command_count), + shortrevisions, shortonto, command_count); + } + + strbuf_add_commented_lines(buf, msg, strlen(msg)); + + if (get_missing_commit_check_level() == MISSING_COMMIT_CHECK_ERROR) + msg = _("\nDo not remove any line. Use 'drop' " + "explicitly to remove a commit.\n"); + else + msg = _("\nIf you remove a line here " + "THAT COMMIT WILL BE LOST.\n"); + + strbuf_add_commented_lines(buf, msg, strlen(msg)); + + if (edit_todo) + msg = _("\nYou are editing the todo file " + "of an ongoing interactive rebase.\n" + "To continue rebase after editing, run:\n" + " git rebase --continue\n\n"); + else + msg = _("\nHowever, if you remove everything, " + "the rebase will be aborted.\n\n"); + + strbuf_add_commented_lines(buf, msg, strlen(msg)); +} + +int edit_todo_list(struct repository *r, struct todo_list *todo_list, + struct todo_list *new_todo, const char *shortrevisions, + const char *shortonto, unsigned flags) +{ + const char *todo_file = rebase_path_todo(), + *todo_backup = rebase_path_todo_backup(); + unsigned initial = shortrevisions && shortonto; + int incorrect = 0; + + /* If the user is editing the todo list, we first try to parse + * it. If there is an error, we do not return, because the user + * might want to fix it in the first place. */ + if (!initial) + incorrect = todo_list_parse_insn_buffer(r, todo_list->buf.buf, todo_list) | + file_exists(rebase_path_dropped()); + + if (todo_list_write_to_file(r, todo_list, todo_file, shortrevisions, shortonto, + -1, flags | TODO_LIST_SHORTEN_IDS | TODO_LIST_APPEND_TODO_HELP)) + return error_errno(_("could not write '%s'"), todo_file); + + if (!incorrect && + todo_list_write_to_file(r, todo_list, todo_backup, + shortrevisions, shortonto, -1, + (flags | TODO_LIST_APPEND_TODO_HELP) & ~TODO_LIST_SHORTEN_IDS) < 0) + return error(_("could not write '%s'."), rebase_path_todo_backup()); + + if (launch_sequence_editor(todo_file, &new_todo->buf, NULL)) + return -2; + + strbuf_stripspace(&new_todo->buf, 1); + if (initial && new_todo->buf.len == 0) + return -3; + + if (todo_list_parse_insn_buffer(r, new_todo->buf.buf, new_todo)) { + fprintf(stderr, _(edit_todo_list_advice)); + return -4; + } + + if (incorrect) { + if (todo_list_check_against_backup(r, new_todo)) { + write_file(rebase_path_dropped(), "%s", ""); + return -4; + } + + if (incorrect > 0) + unlink(rebase_path_dropped()); + } else if (todo_list_check(todo_list, new_todo)) { + write_file(rebase_path_dropped(), "%s", ""); + return -4; + } + + /* + * See if branches need to be added or removed from the update-refs + * file based on the new todo list. + */ + todo_list_filter_update_refs(r, new_todo); + + return 0; +} + +define_commit_slab(commit_seen, unsigned char); +/* + * Check if the user dropped some commits by mistake + * Behaviour determined by rebase.missingCommitsCheck. + * Check if there is an unrecognized command or a + * bad SHA-1 in a command. + */ +int todo_list_check(struct todo_list *old_todo, struct todo_list *new_todo) +{ + enum missing_commit_check_level check_level = get_missing_commit_check_level(); + struct strbuf missing = STRBUF_INIT; + int res = 0, i; + struct commit_seen commit_seen; + + init_commit_seen(&commit_seen); + + if (check_level == MISSING_COMMIT_CHECK_IGNORE) + goto leave_check; + + /* Mark the commits in git-rebase-todo as seen */ + for (i = 0; i < new_todo->nr; i++) { + struct commit *commit = new_todo->items[i].commit; + if (commit) + *commit_seen_at(&commit_seen, commit) = 1; + } + + /* Find commits in git-rebase-todo.backup yet unseen */ + for (i = old_todo->nr - 1; i >= 0; i--) { + struct todo_item *item = old_todo->items + i; + struct commit *commit = item->commit; + if (commit && !*commit_seen_at(&commit_seen, commit)) { + strbuf_addf(&missing, " - %s %.*s\n", + find_unique_abbrev(&commit->object.oid, DEFAULT_ABBREV), + item->arg_len, + todo_item_get_arg(old_todo, item)); + *commit_seen_at(&commit_seen, commit) = 1; + } + } + + /* Warn about missing commits */ + if (!missing.len) + goto leave_check; + + if (check_level == MISSING_COMMIT_CHECK_ERROR) + res = 1; + + fprintf(stderr, + _("Warning: some commits may have been dropped accidentally.\n" + "Dropped commits (newer to older):\n")); + + /* Make the list user-friendly and display */ + fputs(missing.buf, stderr); + strbuf_release(&missing); + + fprintf(stderr, _("To avoid this message, use \"drop\" to " + "explicitly remove a commit.\n\n" + "Use 'git config rebase.missingCommitsCheck' to change " + "the level of warnings.\n" + "The possible behaviours are: ignore, warn, error.\n\n")); + + fprintf(stderr, _(edit_todo_list_advice)); + +leave_check: + clear_commit_seen(&commit_seen); + return res; +} + +int todo_list_check_against_backup(struct repository *r, struct todo_list *todo_list) +{ + struct todo_list backup = TODO_LIST_INIT; + int res = 0; + + if (strbuf_read_file(&backup.buf, rebase_path_todo_backup(), 0) > 0) { + todo_list_parse_insn_buffer(r, backup.buf.buf, &backup); + res = todo_list_check(&backup, todo_list); + } + + todo_list_release(&backup); + return res; +} |