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git/rebase-interactive.c

228 lines
7.2 KiB

#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"
"\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;
}
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;
}