From 3546c8d927d31048f0d6f41aa132ebdb82cf8bda Mon Sep 17 00:00:00 2001 From: Johannes Schindelin Date: Fri, 14 Jul 2017 16:45:11 +0200 Subject: [PATCH] rebase -i: also expand/collapse the SHA-1s via the rebase--helper This is crucial to improve performance on Windows, as the speed is now mostly dominated by the SHA-1 transformation (because it spawns a new rev-parse process for *every* line, and spawning processes is pretty slow from Git for Windows' MSYS2 Bash). Signed-off-by: Johannes Schindelin Signed-off-by: Junio C Hamano --- builtin/rebase--helper.c | 10 ++++++- git-rebase--interactive.sh | 27 ++---------------- sequencer.c | 57 ++++++++++++++++++++++++++++++++++++++ sequencer.h | 2 ++ 4 files changed, 70 insertions(+), 26 deletions(-) diff --git a/builtin/rebase--helper.c b/builtin/rebase--helper.c index 613053276e..791b62901c 100644 --- a/builtin/rebase--helper.c +++ b/builtin/rebase--helper.c @@ -14,7 +14,7 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix) struct replay_opts opts = REPLAY_OPTS_INIT; int keep_empty = 0; enum { - CONTINUE = 1, ABORT, MAKE_SCRIPT + CONTINUE = 1, ABORT, MAKE_SCRIPT, SHORTEN_SHA1S, EXPAND_SHA1S } command = 0; struct option options[] = { OPT_BOOL(0, "ff", &opts.allow_ff, N_("allow fast-forward")), @@ -25,6 +25,10 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix) ABORT), OPT_CMDMODE(0, "make-script", &command, N_("make rebase script"), MAKE_SCRIPT), + OPT_CMDMODE(0, "shorten-ids", &command, + N_("shorten SHA-1s in the todo list"), SHORTEN_SHA1S), + OPT_CMDMODE(0, "expand-ids", &command, + N_("expand SHA-1s in the todo list"), EXPAND_SHA1S), OPT_END() }; @@ -43,5 +47,9 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix) return !!sequencer_remove_state(&opts); if (command == MAKE_SCRIPT && argc > 1) return !!sequencer_make_script(keep_empty, stdout, argc, argv); + if (command == SHORTEN_SHA1S && argc == 1) + return !!transform_todo_ids(1); + if (command == EXPAND_SHA1S && argc == 1) + return !!transform_todo_ids(0); usage_with_options(builtin_rebase_helper_usage, options); } diff --git a/git-rebase--interactive.sh b/git-rebase--interactive.sh index 9d65212b7f..d5df02435a 100644 --- a/git-rebase--interactive.sh +++ b/git-rebase--interactive.sh @@ -750,35 +750,12 @@ skip_unnecessary_picks () { die "$(gettext "Could not skip unnecessary pick commands")" } -transform_todo_ids () { - while read -r command rest - do - case "$command" in - "$comment_char"* | exec) - # Be careful for oddball commands like 'exec' - # that do not have a SHA-1 at the beginning of $rest. - ;; - *) - sha1=$(git rev-parse --verify --quiet "$@" ${rest%%[ ]*}) && - if test "a$rest" = "a${rest#*[ ]}" - then - rest=$sha1 - else - rest="$sha1 ${rest#*[ ]}" - fi - ;; - esac - printf '%s\n' "$command${rest:+ }$rest" - done <"$todo" >"$todo.new" && - mv -f "$todo.new" "$todo" -} - expand_todo_ids() { - transform_todo_ids + git rebase--helper --expand-ids } collapse_todo_ids() { - transform_todo_ids --short + git rebase--helper --shorten-ids } # Rearrange the todo list that has both "pick sha1 msg" and diff --git a/sequencer.c b/sequencer.c index afcb3d00a3..36ed45d905 100644 --- a/sequencer.c +++ b/sequencer.c @@ -2462,3 +2462,60 @@ int sequencer_make_script(int keep_empty, FILE *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; +} diff --git a/sequencer.h b/sequencer.h index 83f2943b7a..71d25374af 100644 --- a/sequencer.h +++ b/sequencer.h @@ -48,6 +48,8 @@ int sequencer_remove_state(struct replay_opts *opts); int sequencer_make_script(int keep_empty, FILE *out, int argc, const char **argv); +int transform_todo_ids(int shorten_ids); + extern const char sign_off_header[]; void append_signoff(struct strbuf *msgbuf, int ignore_footer, unsigned flag); -- 2.43.2