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-rw-r--r--rebase-interactive.c237
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;
+}