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-rw-r--r--sequencer.c327
1 files changed, 198 insertions, 129 deletions
diff --git a/sequencer.c b/sequencer.c
index bceb6abcb6..42f495c4b4 100644
--- a/sequencer.c
+++ b/sequencer.c
@@ -1,7 +1,6 @@
-#include "cache.h"
+#include "git-compat-util.h"
#include "abspath.h"
#include "advice.h"
-#include "alloc.h"
#include "config.h"
#include "copy.h"
#include "environment.h"
@@ -11,7 +10,7 @@
#include "dir.h"
#include "object-file.h"
#include "object-name.h"
-#include "object-store.h"
+#include "object-store-ll.h"
#include "object.h"
#include "pager.h"
#include "commit.h"
@@ -23,11 +22,14 @@
#include "utf8.h"
#include "cache-tree.h"
#include "diff.h"
+#include "path.h"
#include "revision.h"
#include "rerere.h"
+#include "merge.h"
#include "merge-ort.h"
#include "merge-ort-wrappers.h"
#include "refs.h"
+#include "sparse-index.h"
#include "strvec.h"
#include "quote.h"
#include "trailer.h"
@@ -46,10 +48,18 @@
#include "rebase-interactive.h"
#include "reset.h"
#include "branch.h"
-#include "wrapper.h"
#define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
+/*
+ * To accommodate common filesystem limitations, where the loose refs' file
+ * names must not exceed `NAME_MAX`, the labels generated by `git rebase
+ * --rebase-merges` need to be truncated if the corresponding commit subjects
+ * are too long.
+ * Add some margin to stay clear from reaching `NAME_MAX`.
+ */
+#define GIT_MAX_LABEL_LENGTH ((NAME_MAX) - (LOCK_SUFFIX_LEN) - 16)
+
static const char sign_off_header[] = "Signed-off-by: ";
static const char cherry_picked_prefix[] = "(cherry picked from commit ";
@@ -138,6 +148,11 @@ static GIT_PATH_FUNC(rebase_path_amend, "rebase-merge/amend")
*/
static GIT_PATH_FUNC(rebase_path_stopped_sha, "rebase-merge/stopped-sha")
/*
+ * When we stop for the user to resolve conflicts this file contains
+ * the patch of the commit that is being picked.
+ */
+static GIT_PATH_FUNC(rebase_path_patch, "rebase-merge/patch")
+/*
* For the post-rewrite hook, we make a list of rewritten commits and
* their new sha1s. The rewritten-pending list keeps the sha1s of
* commits that have been processed, but not committed yet,
@@ -219,7 +234,8 @@ static struct update_ref_record *init_update_ref_record(const char *ref)
return rec;
}
-static int git_sequencer_config(const char *k, const char *v, void *cb)
+static int git_sequencer_config(const char *k, const char *v,
+ const struct config_context *ctx, void *cb)
{
struct replay_opts *opts = cb;
int status;
@@ -274,7 +290,7 @@ static int git_sequencer_config(const char *k, const char *v, void *cb)
if (opts->action == REPLAY_REVERT && !strcmp(k, "revert.reference"))
opts->commit_use_reference = git_config_bool(k, v);
- return git_diff_basic_config(k, v, NULL);
+ return git_diff_basic_config(k, v, ctx, NULL);
}
void sequencer_init_config(struct replay_opts *opts)
@@ -660,11 +676,12 @@ void append_conflicts_hint(struct index_state *istate,
}
strbuf_addch(msgbuf, '\n');
- strbuf_commented_addf(msgbuf, "Conflicts:\n");
+ strbuf_commented_addf(msgbuf, comment_line_char, "Conflicts:\n");
for (i = 0; i < istate->cache_nr;) {
const struct cache_entry *ce = istate->cache[i++];
if (ce_stage(ce)) {
- strbuf_commented_addf(msgbuf, "\t%s\n", ce->name);
+ strbuf_commented_addf(msgbuf, comment_line_char,
+ "\t%s\n", ce->name);
while (i < istate->cache_nr &&
!strcmp(ce->name, istate->cache[i]->name))
i++;
@@ -1143,7 +1160,8 @@ void cleanup_message(struct strbuf *msgbuf,
cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
strbuf_setlen(msgbuf, wt_status_locate_end(msgbuf->buf, msgbuf->len));
if (cleanup_mode != COMMIT_MSG_CLEANUP_NONE)
- strbuf_stripspace(msgbuf, cleanup_mode == COMMIT_MSG_CLEANUP_ALL);
+ strbuf_stripspace(msgbuf,
+ cleanup_mode == COMMIT_MSG_CLEANUP_ALL ? comment_line_char : '\0');
}
/*
@@ -1174,7 +1192,8 @@ int template_untouched(const struct strbuf *sb, const char *template_file,
if (!template_file || strbuf_read_file(&tmpl, template_file, 0) <= 0)
return 0;
- strbuf_stripspace(&tmpl, cleanup_mode == COMMIT_MSG_CLEANUP_ALL);
+ strbuf_stripspace(&tmpl,
+ cleanup_mode == COMMIT_MSG_CLEANUP_ALL ? comment_line_char : '\0');
if (!skip_prefix(sb->buf, tmpl.buf, &start))
start = sb->buf;
strbuf_release(&tmpl);
@@ -1546,7 +1565,8 @@ static int try_to_commit(struct repository *r,
cleanup = opts->default_msg_cleanup;
if (cleanup != COMMIT_MSG_CLEANUP_NONE)
- strbuf_stripspace(msg, cleanup == COMMIT_MSG_CLEANUP_ALL);
+ strbuf_stripspace(msg,
+ cleanup == COMMIT_MSG_CLEANUP_ALL ? comment_line_char : '\0');
if ((flags & EDIT_MSG) && message_is_empty(msg, cleanup)) {
res = 1; /* run 'git commit' to display error message */
goto out;
@@ -1840,7 +1860,7 @@ static void add_commented_lines(struct strbuf *buf, const void *str, size_t len)
s += count;
len -= count;
}
- strbuf_add_commented_lines(buf, s, len);
+ strbuf_add_commented_lines(buf, s, len, comment_line_char);
}
/* Does the current fixup chain contain a squash command? */
@@ -1939,7 +1959,7 @@ static int append_squash_message(struct strbuf *buf, const char *body,
strbuf_addf(buf, _(nth_commit_msg_fmt),
++opts->current_fixup_count + 1);
strbuf_addstr(buf, "\n\n");
- strbuf_add_commented_lines(buf, body, commented_len);
+ strbuf_add_commented_lines(buf, body, commented_len, comment_line_char);
/* buf->buf may be reallocated so store an offset into the buffer */
fixup_off = buf->len;
strbuf_addstr(buf, body + commented_len);
@@ -2029,7 +2049,8 @@ static int update_squash_messages(struct repository *r,
_(first_commit_msg_str));
strbuf_addstr(&buf, "\n\n");
if (is_fixup_flag(command, flag))
- strbuf_add_commented_lines(&buf, body, strlen(body));
+ strbuf_add_commented_lines(&buf, body, strlen(body),
+ comment_line_char);
else
strbuf_addstr(&buf, body);
@@ -2048,7 +2069,8 @@ static int update_squash_messages(struct repository *r,
strbuf_addf(&buf, _(skip_nth_commit_msg_fmt),
++opts->current_fixup_count + 1);
strbuf_addstr(&buf, "\n\n");
- strbuf_add_commented_lines(&buf, body, strlen(body));
+ strbuf_add_commented_lines(&buf, body, strlen(body),
+ comment_line_char);
} else
return error(_("unknown command: %d"), command);
repo_unuse_commit_buffer(r, commit, message);
@@ -2303,7 +2325,7 @@ static int do_pick_commit(struct repository *r,
const char *dest = git_path_squash_msg(r);
unlink(dest);
if (copy_file(dest, rebase_path_squash_msg(), 0666)) {
- res = error(_("could not rename '%s' to '%s'"),
+ res = error(_("could not copy '%s' to '%s'"),
rebase_path_squash_msg(), dest);
goto leave;
}
@@ -2694,7 +2716,7 @@ int todo_list_parse_insn_buffer(struct repository *r, char *buf,
if (fixup_okay)
; /* do nothing */
else if (is_fixup(item->command))
- return error(_("cannot '%s' without a previous commit"),
+ res = error(_("cannot '%s' without a previous commit"),
command_to_string(item->command));
else if (!is_noop(item->command))
fixup_okay = 1;
@@ -2881,7 +2903,9 @@ static int git_config_string_dup(char **dest,
return 0;
}
-static int populate_opts_cb(const char *key, const char *value, void *data)
+static int populate_opts_cb(const char *key, const char *value,
+ const struct config_context *ctx,
+ void *data)
{
struct replay_opts *opts = data;
int error_flag = 1;
@@ -2889,26 +2913,26 @@ static int populate_opts_cb(const char *key, const char *value, void *data)
if (!value)
error_flag = 0;
else if (!strcmp(key, "options.no-commit"))
- opts->no_commit = git_config_bool_or_int(key, value, &error_flag);
+ opts->no_commit = git_config_bool_or_int(key, value, ctx->kvi, &error_flag);
else if (!strcmp(key, "options.edit"))
- opts->edit = git_config_bool_or_int(key, value, &error_flag);
+ opts->edit = git_config_bool_or_int(key, value, ctx->kvi, &error_flag);
else if (!strcmp(key, "options.allow-empty"))
opts->allow_empty =
- git_config_bool_or_int(key, value, &error_flag);
+ git_config_bool_or_int(key, value, ctx->kvi, &error_flag);
else if (!strcmp(key, "options.allow-empty-message"))
opts->allow_empty_message =
- git_config_bool_or_int(key, value, &error_flag);
+ git_config_bool_or_int(key, value, ctx->kvi, &error_flag);
else if (!strcmp(key, "options.keep-redundant-commits"))
opts->keep_redundant_commits =
- git_config_bool_or_int(key, value, &error_flag);
+ git_config_bool_or_int(key, value, ctx->kvi, &error_flag);
else if (!strcmp(key, "options.signoff"))
- opts->signoff = git_config_bool_or_int(key, value, &error_flag);
+ opts->signoff = git_config_bool_or_int(key, value, ctx->kvi, &error_flag);
else if (!strcmp(key, "options.record-origin"))
- opts->record_origin = git_config_bool_or_int(key, value, &error_flag);
+ opts->record_origin = git_config_bool_or_int(key, value, ctx->kvi, &error_flag);
else if (!strcmp(key, "options.allow-ff"))
- opts->allow_ff = git_config_bool_or_int(key, value, &error_flag);
+ opts->allow_ff = git_config_bool_or_int(key, value, ctx->kvi, &error_flag);
else if (!strcmp(key, "options.mainline"))
- opts->mainline = git_config_int(key, value);
+ opts->mainline = git_config_int(key, value, ctx->kvi);
else if (!strcmp(key, "options.strategy"))
git_config_string_dup(&opts->strategy, key, value);
else if (!strcmp(key, "options.gpg-sign"))
@@ -2917,7 +2941,7 @@ static int populate_opts_cb(const char *key, const char *value, void *data)
strvec_push(&opts->xopts, value);
} else if (!strcmp(key, "options.allow-rerere-auto"))
opts->allow_rerere_auto =
- git_config_bool_or_int(key, value, &error_flag) ?
+ git_config_bool_or_int(key, value, ctx->kvi, &error_flag) ?
RERERE_AUTOUPDATE : RERERE_NOAUTOUPDATE;
else if (!strcmp(key, "options.default-msg-cleanup")) {
opts->explicit_cleanup = 1;
@@ -3382,7 +3406,8 @@ give_advice:
return -1;
}
-static int save_todo(struct todo_list *todo_list, struct replay_opts *opts)
+static int save_todo(struct todo_list *todo_list, struct replay_opts *opts,
+ int reschedule)
{
struct lock_file todo_lock = LOCK_INIT;
const char *todo_path = get_todo_path(opts);
@@ -3392,7 +3417,7 @@ static int save_todo(struct todo_list *todo_list, struct replay_opts *opts)
* rebase -i writes "git-rebase-todo" without the currently executing
* command, appending it to "done" instead.
*/
- if (is_rebase_i(opts))
+ if (is_rebase_i(opts) && !reschedule)
next++;
fd = hold_lock_file_for_update(&todo_lock, todo_path, 0);
@@ -3405,7 +3430,7 @@ static int save_todo(struct todo_list *todo_list, struct replay_opts *opts)
if (commit_lock_file(&todo_lock) < 0)
return error(_("failed to finalize '%s'"), todo_path);
- if (is_rebase_i(opts) && next > 0) {
+ if (is_rebase_i(opts) && !reschedule && next > 0) {
const char *done = rebase_path_done();
int fd = open(done, O_CREAT | O_WRONLY | O_APPEND, 0666);
int ret = 0;
@@ -3486,18 +3511,19 @@ static int make_patch(struct repository *r,
struct commit *commit,
struct replay_opts *opts)
{
- struct strbuf buf = STRBUF_INIT;
struct rev_info log_tree_opt;
const char *subject;
char hex[GIT_MAX_HEXSZ + 1];
int res = 0;
+ if (!is_rebase_i(opts))
+ BUG("make_patch should only be called when rebasing");
+
oid_to_hex_r(hex, &commit->object.oid);
if (write_message(hex, strlen(hex), rebase_path_stopped_sha(), 1) < 0)
return -1;
res |= write_rebase_head(&commit->object.oid);
- strbuf_addf(&buf, "%s/patch", get_dir(opts));
memset(&log_tree_opt, 0, sizeof(log_tree_opt));
repo_init_revisions(r, &log_tree_opt, NULL);
log_tree_opt.abbrev = 0;
@@ -3505,28 +3531,26 @@ static int make_patch(struct repository *r,
log_tree_opt.diffopt.output_format = DIFF_FORMAT_PATCH;
log_tree_opt.disable_stdin = 1;
log_tree_opt.no_commit_id = 1;
- log_tree_opt.diffopt.file = fopen(buf.buf, "w");
+ log_tree_opt.diffopt.file = fopen(rebase_path_patch(), "w");
log_tree_opt.diffopt.use_color = GIT_COLOR_NEVER;
if (!log_tree_opt.diffopt.file)
- res |= error_errno(_("could not open '%s'"), buf.buf);
+ res |= error_errno(_("could not open '%s'"),
+ rebase_path_patch());
else {
res |= log_tree_commit(&log_tree_opt, commit);
fclose(log_tree_opt.diffopt.file);
}
- strbuf_reset(&buf);
- strbuf_addf(&buf, "%s/message", get_dir(opts));
- if (!file_exists(buf.buf)) {
+ if (!file_exists(rebase_path_message())) {
const char *encoding = get_commit_output_encoding();
const char *commit_buffer = repo_logmsg_reencode(r,
commit, NULL,
encoding);
find_commit_subject(commit_buffer, &subject);
- res |= write_message(subject, strlen(subject), buf.buf, 1);
+ res |= write_message(subject, strlen(subject), rebase_path_message(), 1);
repo_unuse_commit_buffer(r, commit,
commit_buffer);
}
- strbuf_release(&buf);
release_revisions(&log_tree_opt);
return res;
@@ -4144,6 +4168,7 @@ static int do_merge(struct repository *r,
if (ret < 0) {
error(_("could not even attempt to merge '%.*s'"),
merge_arg_len, arg);
+ unlink(git_path_merge_msg(r));
goto leave_merge;
}
/*
@@ -4631,6 +4656,68 @@ N_("Could not execute the todo command\n"
" git rebase --edit-todo\n"
" git rebase --continue\n");
+static int pick_one_commit(struct repository *r,
+ struct todo_list *todo_list,
+ struct replay_opts *opts,
+ int *check_todo, int* reschedule)
+{
+ int res;
+ struct todo_item *item = todo_list->items + todo_list->current;
+ const char *arg = todo_item_get_arg(todo_list, item);
+ if (is_rebase_i(opts))
+ opts->reflog_message = reflog_message(
+ opts, command_to_string(item->command), NULL);
+
+ res = do_pick_commit(r, item, opts, is_final_fixup(todo_list),
+ check_todo);
+ if (is_rebase_i(opts) && res < 0) {
+ /* Reschedule */
+ *reschedule = 1;
+ return -1;
+ }
+ if (item->command == TODO_EDIT) {
+ struct commit *commit = item->commit;
+ if (!res) {
+ if (!opts->verbose)
+ term_clear_line();
+ fprintf(stderr, _("Stopped at %s... %.*s\n"),
+ short_commit_name(commit), item->arg_len, arg);
+ }
+ return error_with_patch(r, commit,
+ arg, item->arg_len, opts, res, !res);
+ }
+ if (is_rebase_i(opts) && !res)
+ record_in_rewritten(&item->commit->object.oid,
+ peek_command(todo_list, 1));
+ if (res && is_fixup(item->command)) {
+ if (res == 1)
+ intend_to_amend();
+ return error_failed_squash(r, item->commit, opts,
+ item->arg_len, arg);
+ } else if (res && is_rebase_i(opts) && item->commit) {
+ int to_amend = 0;
+ struct object_id oid;
+
+ /*
+ * If we are rewording and have either
+ * fast-forwarded already, or are about to
+ * create a new root commit, we want to amend,
+ * otherwise we do not.
+ */
+ if (item->command == TODO_REWORD &&
+ !repo_get_oid(r, "HEAD", &oid) &&
+ (oideq(&item->commit->object.oid, &oid) ||
+ (opts->have_squash_onto &&
+ oideq(&opts->squash_onto, &oid))))
+ to_amend = 1;
+
+ return res | error_with_patch(r, item->commit,
+ arg, item->arg_len, opts,
+ res, to_amend);
+ }
+ return res;
+}
+
static int pick_commits(struct repository *r,
struct todo_list *todo_list,
struct replay_opts *opts)
@@ -4646,12 +4733,17 @@ static int pick_commits(struct repository *r,
if (read_and_refresh_cache(r, opts))
return -1;
+ unlink(rebase_path_message());
+ unlink(rebase_path_stopped_sha());
+ unlink(rebase_path_amend());
+ unlink(rebase_path_patch());
+
while (todo_list->current < todo_list->nr) {
struct todo_item *item = todo_list->items + todo_list->current;
const char *arg = todo_item_get_arg(todo_list, item);
int check_todo = 0;
- if (save_todo(todo_list, opts))
+ if (save_todo(todo_list, opts, reschedule))
return -1;
if (is_rebase_i(opts)) {
if (item->command != TODO_COMMENT) {
@@ -4669,10 +4761,7 @@ static int pick_commits(struct repository *r,
todo_list->total_nr,
opts->verbose ? "\n" : "\r");
}
- unlink(rebase_path_message());
unlink(rebase_path_author_script());
- unlink(rebase_path_stopped_sha());
- unlink(rebase_path_amend());
unlink(git_path_merge_head(r));
unlink(git_path_auto_merge(r));
delete_ref(NULL, "REBASE_HEAD", NULL, REF_NO_DEREF);
@@ -4684,66 +4773,10 @@ static int pick_commits(struct repository *r,
}
}
if (item->command <= TODO_SQUASH) {
- if (is_rebase_i(opts))
- opts->reflog_message = reflog_message(opts,
- command_to_string(item->command), NULL);
-
- res = do_pick_commit(r, item, opts,
- is_final_fixup(todo_list),
- &check_todo);
- if (is_rebase_i(opts) && res < 0) {
- /* Reschedule */
- advise(_(rescheduled_advice),
- get_item_line_length(todo_list,
- todo_list->current),
- get_item_line(todo_list,
- todo_list->current));
- todo_list->current--;
- if (save_todo(todo_list, opts))
- return -1;
- }
- if (item->command == TODO_EDIT) {
- struct commit *commit = item->commit;
- if (!res) {
- if (!opts->verbose)
- term_clear_line();
- fprintf(stderr,
- _("Stopped at %s... %.*s\n"),
- short_commit_name(commit),
- item->arg_len, arg);
- }
- return error_with_patch(r, commit,
- arg, item->arg_len, opts, res, !res);
- }
- if (is_rebase_i(opts) && !res)
- record_in_rewritten(&item->commit->object.oid,
- peek_command(todo_list, 1));
- if (res && is_fixup(item->command)) {
- if (res == 1)
- intend_to_amend();
- return error_failed_squash(r, item->commit, opts,
- item->arg_len, arg);
- } else if (res && is_rebase_i(opts) && item->commit) {
- int to_amend = 0;
- struct object_id oid;
-
- /*
- * If we are rewording and have either
- * fast-forwarded already, or are about to
- * create a new root commit, we want to amend,
- * otherwise we do not.
- */
- if (item->command == TODO_REWORD &&
- !repo_get_oid(r, "HEAD", &oid) &&
- (oideq(&item->commit->object.oid, &oid) ||
- (opts->have_squash_onto &&
- oideq(&opts->squash_onto, &oid))))
- to_amend = 1;
-
- return res | error_with_patch(r, item->commit,
- arg, item->arg_len, opts,
- res, to_amend);
- }
+ res = pick_one_commit(r, todo_list, opts, &check_todo,
+ &reschedule);
+ if (!res && item->command == TODO_EDIT)
+ return 0;
} else if (item->command == TODO_EXEC) {
char *end_of_arg = (char *)(arg + item->arg_len);
int saved = *end_of_arg;
@@ -4791,32 +4824,25 @@ static int pick_commits(struct repository *r,
get_item_line_length(todo_list,
todo_list->current),
get_item_line(todo_list, todo_list->current));
- todo_list->current--;
- if (save_todo(todo_list, opts))
+ if (save_todo(todo_list, opts, reschedule))
return -1;
if (item->commit)
- return error_with_patch(r,
- item->commit,
- arg, item->arg_len,
- opts, res, 0);
+ write_rebase_head(&item->commit->object.oid);
} else if (is_rebase_i(opts) && check_todo && !res &&
reread_todo_if_changed(r, todo_list, opts)) {
return -1;
}
- todo_list->current++;
if (res)
return res;
+
+ todo_list->current++;
}
if (is_rebase_i(opts)) {
struct strbuf head_ref = STRBUF_INIT, buf = STRBUF_INIT;
struct stat st;
- /* Stopped in the middle, as planned? */
- if (todo_list->current < todo_list->nr)
- return 0;
-
if (read_oneliner(&head_ref, rebase_path_head_name(), 0) &&
starts_with(head_ref.buf, "refs/")) {
const char *msg;
@@ -4959,6 +4985,11 @@ static int commit_staged_changes(struct repository *r,
is_clean = !has_uncommitted_changes(r, 0);
+ if (!is_clean && !file_exists(rebase_path_message())) {
+ const char *gpg_opt = gpg_sign_opt_quoted(opts);
+
+ return error(_(staged_changes_advice), gpg_opt, gpg_opt);
+ }
if (file_exists(rebase_path_amend())) {
struct strbuf rev = STRBUF_INIT;
struct object_id head, to_amend;
@@ -5038,19 +5069,31 @@ static int commit_staged_changes(struct repository *r,
* We need to update the squash message to skip
* the latest commit message.
*/
+ int res = 0;
struct commit *commit;
+ const char *msg;
const char *path = rebase_path_squash_msg();
const char *encoding = get_commit_output_encoding();
- if (parse_head(r, &commit) ||
- !(p = repo_logmsg_reencode(r, commit, NULL, encoding)) ||
- write_message(p, strlen(p), path, 0)) {
- repo_unuse_commit_buffer(r, commit, p);
- return error(_("could not write file: "
+ if (parse_head(r, &commit))
+ return error(_("could not parse HEAD"));
+
+ p = repo_logmsg_reencode(r, commit, NULL, encoding);
+ if (!p) {
+ res = error(_("could not parse commit %s"),
+ oid_to_hex(&commit->object.oid));
+ goto unuse_commit_buffer;
+ }
+ find_commit_subject(p, &msg);
+ if (write_message(msg, strlen(msg), path, 0)) {
+ res = error(_("could not write file: "
"'%s'"), path);
+ goto unuse_commit_buffer;
}
- repo_unuse_commit_buffer(r,
- commit, p);
+ unuse_commit_buffer:
+ repo_unuse_commit_buffer(r, commit, p);
+ if (res)
+ return res;
}
}
@@ -5330,6 +5373,7 @@ struct label_state {
struct oidmap commit2label;
struct hashmap labels;
struct strbuf buf;
+ int max_label_length;
};
static const char *label_oid(struct object_id *oid, const char *label,
@@ -5386,6 +5430,8 @@ static const char *label_oid(struct object_id *oid, const char *label,
}
} else {
struct strbuf *buf = &state->buf;
+ int label_is_utf8 = 1; /* start with this assumption */
+ size_t max_len = buf->len + state->max_label_length;
/*
* Sanitize labels by replacing non-alpha-numeric characters
@@ -5394,14 +5440,34 @@ static const char *label_oid(struct object_id *oid, const char *label,
*
* Note that we retain non-ASCII UTF-8 characters (identified
* via the most significant bit). They should be all acceptable
- * in file names. We do not validate the UTF-8 here, that's not
- * the job of this function.
+ * in file names.
+ *
+ * As we will use the labels as names of (loose) refs, it is
+ * vital that the name not be longer than the maximum component
+ * size of the file system (`NAME_MAX`). We are careful to
+ * truncate the label accordingly, allowing for the `.lock`
+ * suffix and for the label to be UTF-8 encoded (i.e. we avoid
+ * truncating in the middle of a character).
*/
- for (; *label; label++)
- if ((*label & 0x80) || isalnum(*label))
+ for (; *label && buf->len + 1 < max_len; label++)
+ if (isalnum(*label) ||
+ (!label_is_utf8 && (*label & 0x80)))
strbuf_addch(buf, *label);
+ else if (*label & 0x80) {
+ const char *p = label;
+
+ utf8_width(&p, NULL);
+ if (p) {
+ if (buf->len + (p - label) > max_len)
+ break;
+ strbuf_add(buf, label, p - label);
+ label = p - 1;
+ } else {
+ label_is_utf8 = 0;
+ strbuf_addch(buf, *label);
+ }
/* avoid leading dash and double-dashes */
- else if (buf->len && buf->buf[buf->len - 1] != '-')
+ } else if (buf->len && buf->buf[buf->len - 1] != '-')
strbuf_addch(buf, '-');
if (!buf->len) {
strbuf_addstr(buf, "rev-");
@@ -5463,7 +5529,8 @@ static int make_script_with_merges(struct pretty_print_context *pp,
struct string_entry *entry;
struct oidset interesting = OIDSET_INIT, child_seen = OIDSET_INIT,
shown = OIDSET_INIT;
- struct label_state state = { OIDMAP_INIT, { NULL }, STRBUF_INIT };
+ struct label_state state =
+ { OIDMAP_INIT, { NULL }, STRBUF_INIT, GIT_MAX_LABEL_LENGTH };
int abbr = flags & TODO_LIST_ABBREVIATE_CMDS;
const char *cmd_pick = abbr ? "p" : "pick",
@@ -5471,6 +5538,8 @@ static int make_script_with_merges(struct pretty_print_context *pp,
*cmd_reset = abbr ? "t" : "reset",
*cmd_merge = abbr ? "m" : "merge";
+ git_config_get_int("rebase.maxlabellength", &state.max_label_length);
+
oidmap_init(&commit2todo, 0);
oidmap_init(&state.commit2label, 0);
hashmap_init(&state.labels, labels_cmp, NULL, 0);
@@ -6172,7 +6241,7 @@ int complete_action(struct repository *r, struct replay_opts *opts, unsigned fla
if (checkout_onto(r, opts, onto_name, &oid, orig_head))
goto cleanup;
- if (require_clean_work_tree(r, "rebase", "", 1, 1))
+ if (require_clean_work_tree(r, "rebase", NULL, 1, 1))
goto cleanup;
todo_list_write_total_nr(&new_todo);