#include "cache.h"
+#include "config.h"
#include "lockfile.h"
#include "sequencer.h"
#include "dir.h"
#include "trailer.h"
#include "log-tree.h"
#include "wt-status.h"
+#include "hashmap.h"
#define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
static struct tree *empty_tree(void)
{
- return lookup_tree(EMPTY_TREE_SHA1_BIN);
+ return lookup_tree(&empty_tree_oid);
}
static int error_dirty_index(struct replay_opts *opts)
write_file(git_path_abort_safety_file(), "%s", "");
}
-static int fast_forward_to(const unsigned char *to, const unsigned char *from,
+static int fast_forward_to(const struct object_id *to, const struct object_id *from,
int unborn, struct replay_opts *opts)
{
struct ref_transaction *transaction;
transaction = ref_transaction_begin(&err);
if (!transaction ||
ref_transaction_update(transaction, "HEAD",
- to, unborn ? null_sha1 : from,
+ to->hash, unborn ? null_sha1 : from->hash,
0, sb.buf, &err) ||
ref_transaction_commit(transaction, &err)) {
ref_transaction_free(transaction);
static int do_recursive_merge(struct commit *base, struct commit *next,
const char *base_label, const char *next_label,
- unsigned char *head, struct strbuf *msgbuf,
+ struct object_id *head, struct strbuf *msgbuf,
struct replay_opts *opts)
{
struct merge_options o;
static int is_index_unchanged(void)
{
- unsigned char head_sha1[20];
+ struct object_id head_oid;
struct commit *head_commit;
- if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, head_sha1, NULL))
+ if (!resolve_ref_unsafe("HEAD", RESOLVE_REF_READING, head_oid.hash, NULL))
return error(_("could not resolve HEAD commit\n"));
- head_commit = lookup_commit(head_sha1);
+ head_commit = lookup_commit(&head_oid);
/*
* If head_commit is NULL, check_commit, called from
if (cache_tree_update(&the_index, 0))
return error(_("unable to update cache tree\n"));
- return !hashcmp(active_cache_tree->sha1, head_commit->tree->object.oid.hash);
+ return !oidcmp(&active_cache_tree->oid,
+ &head_commit->tree->object.oid);
}
static int write_author_script(const char *message)
strbuf_splice(&buf, 0, eol - buf.buf, header.buf, header.len);
strbuf_release(&header);
} else {
- unsigned char head[20];
+ struct object_id head;
struct commit *head_commit;
const char *head_message, *body;
- if (get_sha1("HEAD", head))
+ if (get_oid("HEAD", &head))
return error(_("need a HEAD to fixup"));
- if (!(head_commit = lookup_commit_reference(head)))
+ if (!(head_commit = lookup_commit_reference(&head)))
return error(_("could not read HEAD"));
if (!(head_message = get_commit_buffer(head_commit, NULL)))
return error(_("could not read HEAD's commit message"));
FILE *out;
if (strbuf_read_file(&buf, rebase_path_rewritten_pending(), 82) > 0 &&
- !get_sha1("HEAD", newsha1) &&
- (out = fopen(rebase_path_rewritten_list(), "a"))) {
+ !get_sha1("HEAD", newsha1) &&
+ (out = fopen_or_warn(rebase_path_rewritten_list(), "a"))) {
char *bol = buf.buf, *eol;
while (*bol) {
static void record_in_rewritten(struct object_id *oid,
enum todo_command next_command) {
- FILE *out = fopen(rebase_path_rewritten_pending(), "a");
+ FILE *out = fopen_or_warn(rebase_path_rewritten_pending(), "a");
if (!out)
return;
{
unsigned int flags = opts->edit ? EDIT_MSG : 0;
const char *msg_file = opts->edit ? NULL : git_path_merge_msg();
- unsigned char head[20];
+ struct object_id head;
struct commit *base, *next, *parent;
const char *base_label, *next_label;
struct commit_message msg = { NULL, NULL, NULL, NULL };
* that represents the "current" state for merge-recursive
* to work on.
*/
- if (write_cache_as_tree(head, 0, NULL))
+ if (write_cache_as_tree(head.hash, 0, NULL))
return error(_("your index file is unmerged."));
} else {
- unborn = get_sha1("HEAD", head);
+ unborn = get_oid("HEAD", &head);
if (unborn)
- hashcpy(head, EMPTY_TREE_SHA1_BIN);
+ oidcpy(&head, &empty_tree_oid);
if (index_differs_from(unborn ? EMPTY_TREE_SHA1_HEX : "HEAD", 0, 0))
return error_dirty_index(opts);
}
oid_to_hex(&commit->object.oid));
if (opts->allow_ff && !is_fixup(command) &&
- ((parent && !hashcmp(parent->object.oid.hash, head)) ||
+ ((parent && !oidcmp(&parent->object.oid, &head)) ||
(!parent && unborn))) {
if (is_rebase_i(opts))
write_author_script(msg.message);
- res = fast_forward_to(commit->object.oid.hash, head, unborn,
+ res = fast_forward_to(&commit->object.oid, &head, unborn,
opts);
if (res || command != TODO_REWORD)
goto leave;
res = -1;
else if (!opts->strategy || !strcmp(opts->strategy, "recursive") || command == TODO_REVERT) {
res = do_recursive_merge(base, next, base_label, next_label,
- head, &msgbuf, opts);
+ &head, &msgbuf, opts);
if (res < 0)
return res;
res |= write_message(msgbuf.buf, msgbuf.len,
commit_list_insert(next, &remotes);
res |= try_merge_command(opts->strategy,
opts->xopts_nr, (const char **)opts->xopts,
- common, sha1_to_hex(head), remotes);
+ common, oid_to_hex(&head), remotes);
free_commit_list(common);
free_commit_list(remotes);
}
static void todo_list_release(struct todo_list *todo_list)
{
strbuf_release(&todo_list->buf);
- free(todo_list->items);
- todo_list->items = NULL;
+ FREE_AND_NULL(todo_list->items);
todo_list->nr = todo_list->alloc = 0;
}
static int parse_insn_line(struct todo_item *item, const char *bol, char *eol)
{
- unsigned char commit_sha1[20];
+ struct object_id commit_oid;
char *end_of_object_name;
int i, saved, status, padding;
end_of_object_name = (char *) bol + strcspn(bol, " \t\n");
saved = *end_of_object_name;
*end_of_object_name = '\0';
- status = get_sha1(bol, commit_sha1);
+ status = get_oid(bol, &commit_oid);
*end_of_object_name = saved;
item->arg = end_of_object_name + strspn(end_of_object_name, " \t");
if (status < 0)
return -1;
- item->commit = lookup_commit_reference(commit_sha1);
+ item->commit = lookup_commit_reference(&commit_oid);
return !item->commit;
}
if (is_rebase_i(opts)) {
struct todo_list done = TODO_LIST_INIT;
- FILE *f = fopen(rebase_path_msgtotal(), "w");
+ FILE *f = fopen_or_warn(rebase_path_msgtotal(), "w");
if (strbuf_read_file(&done.buf, rebase_path_done(), 0) > 0 &&
!parse_insn_buffer(done.buf.buf, &done))
argv_array_push(&child.args, "apply");
argv_array_push(&child.args, stash_sha1.buf);
if (!run_command(&child))
- printf(_("Applied autostash.\n"));
+ fprintf(stderr, _("Applied autostash.\n"));
else {
struct child_process store = CHILD_PROCESS_INIT;
if (run_command(&store))
ret = error(_("cannot store %s"), stash_sha1.buf);
else
- printf(_("Applying autostash resulted in conflicts.\n"
- "Your changes are safe in the stash.\n"
- "You can run \"git stash pop\" or"
- " \"git stash drop\" at any time.\n"));
+ fprintf(stderr,
+ _("Applying autostash resulted in conflicts.\n"
+ "Your changes are safe in the stash.\n"
+ "You can run \"git stash pop\" or"
+ " \"git stash drop\" at any time.\n"));
}
strbuf_release(&stash_sha1);
if (read_oneliner(&buf, rebase_path_orig_head(), 0) &&
!get_sha1(buf.buf, orig.hash) &&
!get_sha1("HEAD", head.hash)) {
- diff_tree_sha1(orig.hash, head.hash,
- "", &log_tree_opt.diffopt);
+ diff_tree_oid(&orig, &head, "",
+ &log_tree_opt.diffopt);
log_tree_diff_flush(&log_tree_opt);
}
}
int sequencer_pick_revisions(struct replay_opts *opts)
{
struct todo_list todo_list = TODO_LIST_INIT;
- unsigned char sha1[20];
+ struct object_id oid;
int i, res;
assert(opts->revs);
return -1;
for (i = 0; i < opts->revs->pending.nr; i++) {
- unsigned char sha1[20];
+ struct object_id oid;
const char *name = opts->revs->pending.objects[i].name;
/* This happens when using --stdin. */
if (!strlen(name))
continue;
- if (!get_sha1(name, sha1)) {
- if (!lookup_commit_reference_gently(sha1, 1)) {
- enum object_type type = sha1_object_info(sha1, NULL);
+ if (!get_oid(name, &oid)) {
+ if (!lookup_commit_reference_gently(&oid, 1)) {
+ enum object_type type = sha1_object_info(oid.hash, NULL);
return error(_("%s: can't cherry-pick a %s"),
name, typename(type));
}
if (walk_revs_populate_todo(&todo_list, opts) ||
create_seq_dir() < 0)
return -1;
- if (get_sha1("HEAD", sha1) && (opts->action == REPLAY_REVERT))
+ if (get_oid("HEAD", &oid) && (opts->action == REPLAY_REVERT))
return error(_("can't revert as initial commit"));
- if (save_head(sha1_to_hex(sha1)))
+ if (save_head(oid_to_hex(&oid)))
return -1;
if (save_opts(opts))
return -1;
strbuf_release(&sob);
}
+
+int sequencer_make_script(int keep_empty, FILE *out,
+ int argc, const char **argv)
+{
+ char *format = NULL;
+ struct pretty_print_context pp = {0};
+ struct strbuf buf = STRBUF_INIT;
+ struct rev_info revs;
+ struct commit *commit;
+
+ init_revisions(&revs, NULL);
+ revs.verbose_header = 1;
+ revs.max_parents = 1;
+ revs.cherry_pick = 1;
+ revs.limited = 1;
+ revs.reverse = 1;
+ revs.right_only = 1;
+ revs.sort_order = REV_SORT_IN_GRAPH_ORDER;
+ revs.topo_order = 1;
+
+ revs.pretty_given = 1;
+ git_config_get_string("rebase.instructionFormat", &format);
+ if (!format || !*format) {
+ free(format);
+ format = xstrdup("%s");
+ }
+ get_commit_format(format, &revs);
+ free(format);
+ pp.fmt = revs.commit_format;
+ pp.output_encoding = get_log_output_encoding();
+
+ if (setup_revisions(argc, argv, &revs, NULL) > 1)
+ return error(_("make_script: unhandled options"));
+
+ if (prepare_revision_walk(&revs) < 0)
+ return error(_("make_script: error preparing revisions"));
+
+ while ((commit = get_revision(&revs))) {
+ strbuf_reset(&buf);
+ if (!keep_empty && is_original_commit_empty(commit))
+ strbuf_addf(&buf, "%c ", comment_line_char);
+ strbuf_addf(&buf, "pick %s ", oid_to_hex(&commit->object.oid));
+ pretty_print_commit(&pp, commit, &buf);
+ strbuf_addch(&buf, '\n');
+ fputs(buf.buf, out);
+ }
+ strbuf_release(&buf);
+ return 0;
+}
+
+
+int transform_todo_ids(int shorten_ids)
+{
+ const char *todo_file = rebase_path_todo();
+ struct todo_list todo_list = TODO_LIST_INIT;
+ int fd, res, i;
+ FILE *out;
+
+ strbuf_reset(&todo_list.buf);
+ fd = open(todo_file, O_RDONLY);
+ if (fd < 0)
+ return error_errno(_("could not open '%s'"), todo_file);
+ if (strbuf_read(&todo_list.buf, fd, 0) < 0) {
+ close(fd);
+ return error(_("could not read '%s'."), todo_file);
+ }
+ close(fd);
+
+ res = parse_insn_buffer(todo_list.buf.buf, &todo_list);
+ if (res) {
+ todo_list_release(&todo_list);
+ return error(_("unusable todo list: '%s'"), todo_file);
+ }
+
+ out = fopen(todo_file, "w");
+ if (!out) {
+ todo_list_release(&todo_list);
+ return error(_("unable to open '%s' for writing"), todo_file);
+ }
+ for (i = 0; i < todo_list.nr; i++) {
+ struct todo_item *item = todo_list.items + i;
+ int bol = item->offset_in_buf;
+ const char *p = todo_list.buf.buf + bol;
+ int eol = i + 1 < todo_list.nr ?
+ todo_list.items[i + 1].offset_in_buf :
+ todo_list.buf.len;
+
+ if (item->command >= TODO_EXEC && item->command != TODO_DROP)
+ fwrite(p, eol - bol, 1, out);
+ else {
+ const char *id = shorten_ids ?
+ short_commit_name(item->commit) :
+ oid_to_hex(&item->commit->object.oid);
+ int len;
+
+ p += strspn(p, " \t"); /* left-trim command */
+ len = strcspn(p, " \t"); /* length of command */
+
+ fprintf(out, "%.*s %s %.*s\n",
+ len, p, id, item->arg_len, item->arg);
+ }
+ }
+ fclose(out);
+ todo_list_release(&todo_list);
+ return 0;
+}
+
+enum check_level {
+ CHECK_IGNORE = 0, CHECK_WARN, CHECK_ERROR
+};
+
+static enum check_level get_missing_commit_check_level(void)
+{
+ const char *value;
+
+ if (git_config_get_value("rebase.missingcommitscheck", &value) ||
+ !strcasecmp("ignore", value))
+ return CHECK_IGNORE;
+ if (!strcasecmp("warn", value))
+ return CHECK_WARN;
+ if (!strcasecmp("error", value))
+ return CHECK_ERROR;
+ warning(_("unrecognized setting %s for option"
+ "rebase.missingCommitsCheck. Ignoring."), value);
+ return CHECK_IGNORE;
+}
+
+/*
+ * 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 check_todo_list(void)
+{
+ enum check_level check_level = get_missing_commit_check_level();
+ struct strbuf todo_file = STRBUF_INIT;
+ struct todo_list todo_list = TODO_LIST_INIT;
+ struct strbuf missing = STRBUF_INIT;
+ int advise_to_edit_todo = 0, res = 0, fd, i;
+
+ strbuf_addstr(&todo_file, rebase_path_todo());
+ fd = open(todo_file.buf, O_RDONLY);
+ if (fd < 0) {
+ res = error_errno(_("could not open '%s'"), todo_file.buf);
+ goto leave_check;
+ }
+ if (strbuf_read(&todo_list.buf, fd, 0) < 0) {
+ close(fd);
+ res = error(_("could not read '%s'."), todo_file.buf);
+ goto leave_check;
+ }
+ close(fd);
+ advise_to_edit_todo = res =
+ parse_insn_buffer(todo_list.buf.buf, &todo_list);
+
+ if (res || check_level == CHECK_IGNORE)
+ goto leave_check;
+
+ /* Mark the commits in git-rebase-todo as seen */
+ for (i = 0; i < todo_list.nr; i++) {
+ struct commit *commit = todo_list.items[i].commit;
+ if (commit)
+ commit->util = (void *)1;
+ }
+
+ todo_list_release(&todo_list);
+ strbuf_addstr(&todo_file, ".backup");
+ fd = open(todo_file.buf, O_RDONLY);
+ if (fd < 0) {
+ res = error_errno(_("could not open '%s'"), todo_file.buf);
+ goto leave_check;
+ }
+ if (strbuf_read(&todo_list.buf, fd, 0) < 0) {
+ close(fd);
+ res = error(_("could not read '%s'."), todo_file.buf);
+ goto leave_check;
+ }
+ close(fd);
+ strbuf_release(&todo_file);
+ res = !!parse_insn_buffer(todo_list.buf.buf, &todo_list);
+
+ /* Find commits in git-rebase-todo.backup yet unseen */
+ for (i = todo_list.nr - 1; i >= 0; i--) {
+ struct todo_item *item = todo_list.items + i;
+ struct commit *commit = item->commit;
+ if (commit && !commit->util) {
+ strbuf_addf(&missing, " - %s %.*s\n",
+ short_commit_name(commit),
+ item->arg_len, item->arg);
+ commit->util = (void *)1;
+ }
+ }
+
+ /* Warn about missing commits */
+ if (!missing.len)
+ goto leave_check;
+
+ if (check_level == CHECK_ERROR)
+ advise_to_edit_todo = 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"));
+
+leave_check:
+ strbuf_release(&todo_file);
+ todo_list_release(&todo_list);
+
+ if (advise_to_edit_todo)
+ fprintf(stderr,
+ _("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"));
+
+ return res;
+}
+
+/* skip picking commits whose parents are unchanged */
+int skip_unnecessary_picks(void)
+{
+ const char *todo_file = rebase_path_todo();
+ struct strbuf buf = STRBUF_INIT;
+ struct todo_list todo_list = TODO_LIST_INIT;
+ struct object_id onto_oid, *oid = &onto_oid, *parent_oid;
+ int fd, i;
+
+ if (!read_oneliner(&buf, rebase_path_onto(), 0))
+ return error(_("could not read 'onto'"));
+ if (get_oid(buf.buf, &onto_oid)) {
+ strbuf_release(&buf);
+ return error(_("need a HEAD to fixup"));
+ }
+ strbuf_release(&buf);
+
+ fd = open(todo_file, O_RDONLY);
+ if (fd < 0) {
+ return error_errno(_("could not open '%s'"), todo_file);
+ }
+ if (strbuf_read(&todo_list.buf, fd, 0) < 0) {
+ close(fd);
+ return error(_("could not read '%s'."), todo_file);
+ }
+ close(fd);
+ if (parse_insn_buffer(todo_list.buf.buf, &todo_list) < 0) {
+ todo_list_release(&todo_list);
+ return -1;
+ }
+
+ for (i = 0; i < todo_list.nr; i++) {
+ struct todo_item *item = todo_list.items + i;
+
+ if (item->command >= TODO_NOOP)
+ continue;
+ if (item->command != TODO_PICK)
+ break;
+ if (parse_commit(item->commit)) {
+ todo_list_release(&todo_list);
+ return error(_("could not parse commit '%s'"),
+ oid_to_hex(&item->commit->object.oid));
+ }
+ if (!item->commit->parents)
+ break; /* root commit */
+ if (item->commit->parents->next)
+ break; /* merge commit */
+ parent_oid = &item->commit->parents->item->object.oid;
+ if (hashcmp(parent_oid->hash, oid->hash))
+ break;
+ oid = &item->commit->object.oid;
+ }
+ if (i > 0) {
+ int offset = i < todo_list.nr ?
+ todo_list.items[i].offset_in_buf : todo_list.buf.len;
+ const char *done_path = rebase_path_done();
+
+ fd = open(done_path, O_CREAT | O_WRONLY | O_APPEND, 0666);
+ if (fd < 0) {
+ error_errno(_("could not open '%s' for writing"),
+ done_path);
+ todo_list_release(&todo_list);
+ return -1;
+ }
+ if (write_in_full(fd, todo_list.buf.buf, offset) < 0) {
+ error_errno(_("could not write to '%s'"), done_path);
+ todo_list_release(&todo_list);
+ close(fd);
+ return -1;
+ }
+ close(fd);
+
+ fd = open(rebase_path_todo(), O_WRONLY, 0666);
+ if (fd < 0) {
+ error_errno(_("could not open '%s' for writing"),
+ rebase_path_todo());
+ todo_list_release(&todo_list);
+ return -1;
+ }
+ if (write_in_full(fd, todo_list.buf.buf + offset,
+ todo_list.buf.len - offset) < 0) {
+ error_errno(_("could not write to '%s'"),
+ rebase_path_todo());
+ close(fd);
+ todo_list_release(&todo_list);
+ return -1;
+ }
+ if (ftruncate(fd, todo_list.buf.len - offset) < 0) {
+ error_errno(_("could not truncate '%s'"),
+ rebase_path_todo());
+ todo_list_release(&todo_list);
+ close(fd);
+ return -1;
+ }
+ close(fd);
+
+ todo_list.current = i;
+ if (is_fixup(peek_command(&todo_list, 0)))
+ record_in_rewritten(oid, peek_command(&todo_list, 0));
+ }
+
+ todo_list_release(&todo_list);
+ printf("%s\n", oid_to_hex(oid));
+
+ return 0;
+}
+
+struct subject2item_entry {
+ struct hashmap_entry entry;
+ int i;
+ char subject[FLEX_ARRAY];
+};
+
+static int subject2item_cmp(const void *fndata,
+ const struct subject2item_entry *a,
+ const struct subject2item_entry *b, const void *key)
+{
+ return key ? strcmp(a->subject, key) : strcmp(a->subject, b->subject);
+}
+
+/*
+ * Rearrange the todo list that has both "pick commit-id msg" and "pick
+ * commit-id fixup!/squash! msg" in it so that the latter is put immediately
+ * after the former, and change "pick" to "fixup"/"squash".
+ *
+ * Note that if the config has specified a custom instruction format, each log
+ * message will have to be retrieved from the commit (as the oneline in the
+ * script cannot be trusted) in order to normalize the autosquash arrangement.
+ */
+int rearrange_squash(void)
+{
+ const char *todo_file = rebase_path_todo();
+ struct todo_list todo_list = TODO_LIST_INIT;
+ struct hashmap subject2item;
+ int res = 0, rearranged = 0, *next, *tail, fd, i;
+ char **subjects;
+
+ fd = open(todo_file, O_RDONLY);
+ if (fd < 0)
+ return error_errno(_("could not open '%s'"), todo_file);
+ if (strbuf_read(&todo_list.buf, fd, 0) < 0) {
+ close(fd);
+ return error(_("could not read '%s'."), todo_file);
+ }
+ close(fd);
+ if (parse_insn_buffer(todo_list.buf.buf, &todo_list) < 0) {
+ todo_list_release(&todo_list);
+ return -1;
+ }
+
+ /*
+ * The hashmap maps onelines to the respective todo list index.
+ *
+ * If any items need to be rearranged, the next[i] value will indicate
+ * which item was moved directly after the i'th.
+ *
+ * In that case, last[i] will indicate the index of the latest item to
+ * be moved to appear after the i'th.
+ */
+ hashmap_init(&subject2item, (hashmap_cmp_fn) subject2item_cmp,
+ NULL, todo_list.nr);
+ ALLOC_ARRAY(next, todo_list.nr);
+ ALLOC_ARRAY(tail, todo_list.nr);
+ ALLOC_ARRAY(subjects, todo_list.nr);
+ for (i = 0; i < todo_list.nr; i++) {
+ struct strbuf buf = STRBUF_INIT;
+ struct todo_item *item = todo_list.items + i;
+ const char *commit_buffer, *subject, *p;
+ size_t subject_len;
+ int i2 = -1;
+ struct subject2item_entry *entry;
+
+ next[i] = tail[i] = -1;
+ if (item->command >= TODO_EXEC) {
+ subjects[i] = NULL;
+ continue;
+ }
+
+ if (is_fixup(item->command)) {
+ todo_list_release(&todo_list);
+ return error(_("the script was already rearranged."));
+ }
+
+ item->commit->util = item;
+
+ parse_commit(item->commit);
+ commit_buffer = get_commit_buffer(item->commit, NULL);
+ find_commit_subject(commit_buffer, &subject);
+ format_subject(&buf, subject, " ");
+ subject = subjects[i] = strbuf_detach(&buf, &subject_len);
+ unuse_commit_buffer(item->commit, commit_buffer);
+ if ((skip_prefix(subject, "fixup! ", &p) ||
+ skip_prefix(subject, "squash! ", &p))) {
+ struct commit *commit2;
+
+ for (;;) {
+ while (isspace(*p))
+ p++;
+ if (!skip_prefix(p, "fixup! ", &p) &&
+ !skip_prefix(p, "squash! ", &p))
+ break;
+ }
+
+ if ((entry = hashmap_get_from_hash(&subject2item,
+ strhash(p), p)))
+ /* found by title */
+ i2 = entry->i;
+ else if (!strchr(p, ' ') &&
+ (commit2 =
+ lookup_commit_reference_by_name(p)) &&
+ commit2->util)
+ /* found by commit name */
+ i2 = (struct todo_item *)commit2->util
+ - todo_list.items;
+ else {
+ /* copy can be a prefix of the commit subject */
+ for (i2 = 0; i2 < i; i2++)
+ if (subjects[i2] &&
+ starts_with(subjects[i2], p))
+ break;
+ if (i2 == i)
+ i2 = -1;
+ }
+ }
+ if (i2 >= 0) {
+ rearranged = 1;
+ todo_list.items[i].command =
+ starts_with(subject, "fixup!") ?
+ TODO_FIXUP : TODO_SQUASH;
+ if (next[i2] < 0)
+ next[i2] = i;
+ else
+ next[tail[i2]] = i;
+ tail[i2] = i;
+ } else if (!hashmap_get_from_hash(&subject2item,
+ strhash(subject), subject)) {
+ FLEX_ALLOC_MEM(entry, subject, subject, subject_len);
+ entry->i = i;
+ hashmap_entry_init(entry, strhash(entry->subject));
+ hashmap_put(&subject2item, entry);
+ }
+ }
+
+ if (rearranged) {
+ struct strbuf buf = STRBUF_INIT;
+
+ for (i = 0; i < todo_list.nr; i++) {
+ enum todo_command command = todo_list.items[i].command;
+ int cur = i;
+
+ /*
+ * Initially, all commands are 'pick's. If it is a
+ * fixup or a squash now, we have rearranged it.
+ */
+ if (is_fixup(command))
+ continue;
+
+ while (cur >= 0) {
+ int offset = todo_list.items[cur].offset_in_buf;
+ int end_offset = cur + 1 < todo_list.nr ?
+ todo_list.items[cur + 1].offset_in_buf :
+ todo_list.buf.len;
+ char *bol = todo_list.buf.buf + offset;
+ char *eol = todo_list.buf.buf + end_offset;
+
+ /* replace 'pick', by 'fixup' or 'squash' */
+ command = todo_list.items[cur].command;
+ if (is_fixup(command)) {
+ strbuf_addstr(&buf,
+ todo_command_info[command].str);
+ bol += strcspn(bol, " \t");
+ }
+
+ strbuf_add(&buf, bol, eol - bol);
+
+ cur = next[cur];
+ }
+ }
+
+ fd = open(todo_file, O_WRONLY);
+ if (fd < 0)
+ res = error_errno(_("could not open '%s'"), todo_file);
+ else if (write(fd, buf.buf, buf.len) < 0)
+ res = error_errno(_("could not read '%s'."), todo_file);
+ else if (ftruncate(fd, buf.len) < 0)
+ res = error_errno(_("could not finish '%s'"),
+ todo_file);
+ close(fd);
+ strbuf_release(&buf);
+ }
+
+ free(next);
+ free(tail);
+ for (i = 0; i < todo_list.nr; i++)
+ free(subjects[i]);
+ free(subjects);
+ hashmap_free(&subject2item, 1);
+ todo_list_release(&todo_list);
+
+ return res;
+}