git/builtin/revert.c
Jeff King 023ff39b29 parse_options: allocate a new array when concatenating
In exactly one callers (builtin/revert.c), we build up the
options list dynamically from multiple arrays. We do so by
manually inserting "filler" entries into one array, and then
copying the other array into the allocated space.

This is tedious and error-prone, as you have to adjust the
filler any time the second array is modified (although we do
at least check and die() when the counts do not match up).

Instead, let's just allocate a new array.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2016-07-06 10:11:08 -07:00

210 lines
5.9 KiB
C

#include "cache.h"
#include "builtin.h"
#include "parse-options.h"
#include "diff.h"
#include "revision.h"
#include "rerere.h"
#include "dir.h"
#include "sequencer.h"
/*
* This implements the builtins revert and cherry-pick.
*
* Copyright (c) 2007 Johannes E. Schindelin
*
* Based on git-revert.sh, which is
*
* Copyright (c) 2005 Linus Torvalds
* Copyright (c) 2005 Junio C Hamano
*/
static const char * const revert_usage[] = {
N_("git revert [<options>] <commit-ish>..."),
N_("git revert <subcommand>"),
NULL
};
static const char * const cherry_pick_usage[] = {
N_("git cherry-pick [<options>] <commit-ish>..."),
N_("git cherry-pick <subcommand>"),
NULL
};
static const char *action_name(const struct replay_opts *opts)
{
return opts->action == REPLAY_REVERT ? "revert" : "cherry-pick";
}
static const char * const *revert_or_cherry_pick_usage(struct replay_opts *opts)
{
return opts->action == REPLAY_REVERT ? revert_usage : cherry_pick_usage;
}
static int option_parse_x(const struct option *opt,
const char *arg, int unset)
{
struct replay_opts **opts_ptr = opt->value;
struct replay_opts *opts = *opts_ptr;
if (unset)
return 0;
ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc);
opts->xopts[opts->xopts_nr++] = xstrdup(arg);
return 0;
}
LAST_ARG_MUST_BE_NULL
static void verify_opt_compatible(const char *me, const char *base_opt, ...)
{
const char *this_opt;
va_list ap;
va_start(ap, base_opt);
while ((this_opt = va_arg(ap, const char *))) {
if (va_arg(ap, int))
break;
}
va_end(ap);
if (this_opt)
die(_("%s: %s cannot be used with %s"), me, this_opt, base_opt);
}
static void parse_args(int argc, const char **argv, struct replay_opts *opts)
{
const char * const * usage_str = revert_or_cherry_pick_usage(opts);
const char *me = action_name(opts);
int cmd = 0;
struct option base_options[] = {
OPT_CMDMODE(0, "quit", &cmd, N_("end revert or cherry-pick sequence"), 'q'),
OPT_CMDMODE(0, "continue", &cmd, N_("resume revert or cherry-pick sequence"), 'c'),
OPT_CMDMODE(0, "abort", &cmd, N_("cancel revert or cherry-pick sequence"), 'a'),
OPT_BOOL('n', "no-commit", &opts->no_commit, N_("don't automatically commit")),
OPT_BOOL('e', "edit", &opts->edit, N_("edit the commit message")),
OPT_NOOP_NOARG('r', NULL),
OPT_BOOL('s', "signoff", &opts->signoff, N_("add Signed-off-by:")),
OPT_INTEGER('m', "mainline", &opts->mainline, N_("parent number")),
OPT_RERERE_AUTOUPDATE(&opts->allow_rerere_auto),
OPT_STRING(0, "strategy", &opts->strategy, N_("strategy"), N_("merge strategy")),
OPT_CALLBACK('X', "strategy-option", &opts, N_("option"),
N_("option for merge strategy"), option_parse_x),
{ OPTION_STRING, 'S', "gpg-sign", &opts->gpg_sign, N_("key-id"),
N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
OPT_END()
};
struct option *options = base_options;
if (opts->action == REPLAY_PICK) {
struct option cp_extra[] = {
OPT_BOOL('x', NULL, &opts->record_origin, N_("append commit name")),
OPT_BOOL(0, "ff", &opts->allow_ff, N_("allow fast-forward")),
OPT_BOOL(0, "allow-empty", &opts->allow_empty, N_("preserve initially empty commits")),
OPT_BOOL(0, "allow-empty-message", &opts->allow_empty_message, N_("allow commits with empty messages")),
OPT_BOOL(0, "keep-redundant-commits", &opts->keep_redundant_commits, N_("keep redundant, empty commits")),
OPT_END(),
};
options = parse_options_concat(options, cp_extra);
}
argc = parse_options(argc, argv, NULL, options, usage_str,
PARSE_OPT_KEEP_ARGV0 |
PARSE_OPT_KEEP_UNKNOWN);
/* implies allow_empty */
if (opts->keep_redundant_commits)
opts->allow_empty = 1;
/* Set the subcommand */
if (cmd == 'q')
opts->subcommand = REPLAY_REMOVE_STATE;
else if (cmd == 'c')
opts->subcommand = REPLAY_CONTINUE;
else if (cmd == 'a')
opts->subcommand = REPLAY_ROLLBACK;
else
opts->subcommand = REPLAY_NONE;
/* Check for incompatible command line arguments */
if (opts->subcommand != REPLAY_NONE) {
char *this_operation;
if (opts->subcommand == REPLAY_REMOVE_STATE)
this_operation = "--quit";
else if (opts->subcommand == REPLAY_CONTINUE)
this_operation = "--continue";
else {
assert(opts->subcommand == REPLAY_ROLLBACK);
this_operation = "--abort";
}
verify_opt_compatible(me, this_operation,
"--no-commit", opts->no_commit,
"--signoff", opts->signoff,
"--mainline", opts->mainline,
"--strategy", opts->strategy ? 1 : 0,
"--strategy-option", opts->xopts ? 1 : 0,
"-x", opts->record_origin,
"--ff", opts->allow_ff,
NULL);
}
if (opts->allow_ff)
verify_opt_compatible(me, "--ff",
"--signoff", opts->signoff,
"--no-commit", opts->no_commit,
"-x", opts->record_origin,
"--edit", opts->edit,
NULL);
if (opts->subcommand != REPLAY_NONE) {
opts->revs = NULL;
} else {
struct setup_revision_opt s_r_opt;
opts->revs = xmalloc(sizeof(*opts->revs));
init_revisions(opts->revs, NULL);
opts->revs->no_walk = REVISION_WALK_NO_WALK_UNSORTED;
if (argc < 2)
usage_with_options(usage_str, options);
if (!strcmp(argv[1], "-"))
argv[1] = "@{-1}";
memset(&s_r_opt, 0, sizeof(s_r_opt));
s_r_opt.assume_dashdash = 1;
argc = setup_revisions(argc, argv, opts->revs, &s_r_opt);
}
if (argc > 1)
usage_with_options(usage_str, options);
}
int cmd_revert(int argc, const char **argv, const char *prefix)
{
struct replay_opts opts;
int res;
memset(&opts, 0, sizeof(opts));
if (isatty(0))
opts.edit = 1;
opts.action = REPLAY_REVERT;
git_config(git_default_config, NULL);
parse_args(argc, argv, &opts);
res = sequencer_pick_revisions(&opts);
if (res < 0)
die(_("revert failed"));
return res;
}
int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
{
struct replay_opts opts;
int res;
memset(&opts, 0, sizeof(opts));
opts.action = REPLAY_PICK;
git_config(git_default_config, NULL);
parse_args(argc, argv, &opts);
res = sequencer_pick_revisions(&opts);
if (res < 0)
die(_("cherry-pick failed"));
return res;
}