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rebase -i: skip unnecessary picks using the rebase--helper

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In particular on Windows, where shell scripts are even more expensive
than on MacOSX or Linux, it makes sense to move a loop that forks
Git at least once for every line in the todo list into a builtin.

Note: The original code did not try to skip unnecessary picks of root
commits but punts instead (probably --root was not considered common
enough of a use case to bother optimizing). We do the same, for now.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Johannes Schindelin
2017-07-14 16:45:25 +02:00
committed by Junio C Hamano
parent 943999493f
commit cdac2b01ff
4 changed files with 116 additions and 39 deletions
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6
builtin/rebase--helper.c
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@ -15,7 +15,7 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
int keep_empty = 0;
enum {
CONTINUE = 1, ABORT, MAKE_SCRIPT, SHORTEN_SHA1S, EXPAND_SHA1S,
CHECK_TODO_LIST
CHECK_TODO_LIST, SKIP_UNNECESSARY_PICKS
} command = 0;
struct option options[] = {
OPT_BOOL(0, "ff", &opts.allow_ff, N_("allow fast-forward")),
@ -32,6 +32,8 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
N_("expand SHA-1s in the todo list"), EXPAND_SHA1S),
OPT_CMDMODE(0, "check-todo-list", &command,
N_("check the todo list"), CHECK_TODO_LIST),
OPT_CMDMODE(0, "skip-unnecessary-picks", &command,
N_("skip unnecessary picks"), SKIP_UNNECESSARY_PICKS),
OPT_END()
};
@ -56,5 +58,7 @@ int cmd_rebase__helper(int argc, const char **argv, const char *prefix)
return !!transform_todo_ids(0);
if (command == CHECK_TODO_LIST && argc == 1)
return !!check_todo_list();
if (command == SKIP_UNNECESSARY_PICKS && argc == 1)
return !!skip_unnecessary_picks();
usage_with_options(builtin_rebase_helper_usage, options);
}