Merge branch 'js/rebase-i-final'

The final batch to "git rebase -i" updates to move more code from
the shell script to C.

* js/rebase-i-final:
  rebase -i: rearrange fixup/squash lines using the rebase--helper
  t3415: test fixup with wrapped oneline
  rebase -i: skip unnecessary picks using the rebase--helper
  rebase -i: check for missing commits in the rebase--helper
  t3404: relax rebase.missingCommitsCheck tests
  rebase -i: also expand/collapse the SHA-1s via the rebase--helper
  rebase -i: do not invent onelines when expanding/collapsing SHA-1s
  rebase -i: remove useless indentation
  rebase -i: generate the script via rebase--helper
  t3415: verify that an empty instructionFormat is handled as before
This commit is contained in:
Junio C Hamano
2017-10-03 15:42:47 +09:00
7 changed files with 646 additions and 359 deletions

View File

@ -20,6 +20,7 @@
#include "trailer.h"
#include "log-tree.h"
#include "wt-status.h"
#include "hashmap.h"
#define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
@ -2435,3 +2436,533 @@ void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag)
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;
}