The current code uses a set of file-scope static variables to tell the
cherry-pick/ revert machinery how to replay the changes, and
initializes them by parsing the command-line arguments. In later
steps in this series, we would like to introduce an API function that
calls into this machinery directly and have a way to tell it what to
do. Hence, introduce a structure to group these variables, so that
the API can take them as a single replay_options parameter.
Unfortunately, parsing strategy-option violates a C89 rule:
Initializers cannot refer to variables whose address is not known at
compile time.
Helped-by: Junio C Hamano <gitster@xxxxxxxxx>
Helped-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
Signed-off-by: Ramkumar Ramachandra <artagnon@xxxxxxxxx>
---
builtin/revert.c | 176 ++++++++++++++++++++++++++++++------------------------
1 files changed, 99 insertions(+), 77 deletions(-)
diff --git a/builtin/revert.c b/builtin/revert.c
index cf62f93..e2e290c 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -35,76 +35,90 @@ static const char * const cherry_pick_usage[] = {
NULL
};
-static int edit, record_origin, no_commit, mainline, signoff, allow_ff;
-static enum { REVERT, CHERRY_PICK } action;
-static int commit_argc;
-static const char **commit_argv;
-static int allow_rerere_auto;
-
static const char *me;
-
-/* Merge strategy. */
-static const char *strategy;
-static const char **xopts;
-static size_t xopts_nr, xopts_alloc;
+enum replay_action { REVERT, CHERRY_PICK };
+
+struct replay_opts {
+ enum replay_action action;
+
+ /* Boolean options */
+ int edit;
+ int record_origin;
+ int no_commit;
+ int signoff;
+ int allow_ff;
+ int allow_rerere_auto;
+
+ int mainline;
+ int commit_argc;
+ const char **commit_argv;
+
+ /* Merge strategy */
+ const char *strategy;
+ const char **xopts;
+ size_t xopts_nr, xopts_alloc;
+};
#define GIT_REFLOG_ACTION "GIT_REFLOG_ACTION"
static char *get_encoding(const char *message);
-static const char * const *revert_or_cherry_pick_usage(void)
+static const char * const *revert_or_cherry_pick_usage(struct replay_opts *opts)
{
- return action == REVERT ? revert_usage : cherry_pick_usage;
+ return opts->action == 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(xopts, xopts_nr + 1, xopts_alloc);
- xopts[xopts_nr++] = xstrdup(arg);
+ ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc);
+ opts->xopts[opts->xopts_nr++] = xstrdup(arg);
return 0;
}
-static void parse_args(int argc, const char **argv)
+static void parse_args(int argc, const char **argv, struct replay_opts *opts)
{
- const char * const * usage_str = revert_or_cherry_pick_usage();
+ const char * const * usage_str = revert_or_cherry_pick_usage(opts);
int noop;
struct option options[] = {
- OPT_BOOLEAN('n', "no-commit", &no_commit, "don't automatically commit"),
- OPT_BOOLEAN('e', "edit", &edit, "edit the commit message"),
+ OPT_BOOLEAN('n', "no-commit", &opts->no_commit, "don't automatically commit"),
+ OPT_BOOLEAN('e', "edit", &opts->edit, "edit the commit message"),
{ OPTION_BOOLEAN, 'r', NULL, &noop, NULL, "no-op (backward compatibility)",
PARSE_OPT_NOARG | PARSE_OPT_HIDDEN, NULL, 0 },
- OPT_BOOLEAN('s', "signoff", &signoff, "add Signed-off-by:"),
- OPT_INTEGER('m', "mainline", &mainline, "parent number"),
- OPT_RERERE_AUTOUPDATE(&allow_rerere_auto),
- OPT_STRING(0, "strategy", &strategy, "strategy", "merge strategy"),
- OPT_CALLBACK('X', "strategy-option", &xopts, "option",
+ OPT_BOOLEAN('s', "signoff", &opts->signoff, "add Signed-off-by:"),
+ OPT_INTEGER('m', "mainline", &opts->mainline, "parent number"),
+ OPT_RERERE_AUTOUPDATE(&opts->allow_rerere_auto),
+ OPT_STRING(0, "strategy", &opts->strategy, "strategy", "merge strategy"),
+ OPT_CALLBACK('X', "strategy-option", &opts, "option",
"option for merge strategy", option_parse_x),
OPT_END(),
OPT_END(),
OPT_END(),
};
- if (action == CHERRY_PICK) {
+ if (opts->action == CHERRY_PICK) {
struct option cp_extra[] = {
- OPT_BOOLEAN('x', NULL, &record_origin, "append commit name"),
- OPT_BOOLEAN(0, "ff", &allow_ff, "allow fast-forward"),
+ OPT_BOOLEAN('x', NULL, &opts->record_origin, "append commit name"),
+ OPT_BOOLEAN(0, "ff", &opts->allow_ff, "allow fast-forward"),
OPT_END(),
};
if (parse_options_concat(options, ARRAY_SIZE(options), cp_extra))
die(_("program error"));
}
- commit_argc = parse_options(argc, argv, NULL, options, usage_str,
- PARSE_OPT_KEEP_ARGV0 |
- PARSE_OPT_KEEP_UNKNOWN);
- if (commit_argc < 2)
+ opts->commit_argc = parse_options(argc, argv, NULL, options, usage_str,
+ PARSE_OPT_KEEP_ARGV0 |
+ PARSE_OPT_KEEP_UNKNOWN);
+ if (opts->commit_argc < 2)
usage_with_options(usage_str, options);
- commit_argv = argv;
+ opts->commit_argv = argv;
}
struct commit_message {
@@ -273,7 +287,8 @@ static int fast_forward_to(const unsigned char *to, const unsigned char *from)
static int do_recursive_merge(struct commit *base, struct commit *next,
const char *base_label, const char *next_label,
- unsigned char *head, struct strbuf *msgbuf)
+ unsigned char *head, struct strbuf *msgbuf,
+ struct replay_opts *opts)
{
struct merge_options o;
struct tree *result, *next_tree, *base_tree, *head_tree;
@@ -294,7 +309,7 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
next_tree = next ? next->tree : empty_tree();
base_tree = base ? base->tree : empty_tree();
- for (xopt = xopts; xopt != xopts + xopts_nr; xopt++)
+ for (xopt = opts->xopts; xopt != opts->xopts + opts->xopts_nr; xopt++)
parse_merge_opt(&o, *xopt);
clean = merge_trees(&o,
@@ -334,7 +349,7 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
* If we are revert, or if our cherry-pick results in a hand merge,
* we had better say that the current user is responsible for that.
*/
-static int run_git_commit(const char *defmsg)
+static int run_git_commit(const char *defmsg, struct replay_opts *opts)
{
/* 6 is max possible length of our args array including NULL */
const char *args[6];
@@ -342,9 +357,9 @@ static int run_git_commit(const char *defmsg)
args[i++] = "commit";
args[i++] = "-n";
- if (signoff)
+ if (opts->signoff)
args[i++] = "-s";
- if (!edit) {
+ if (!opts->edit) {
args[i++] = "-F";
args[i++] = defmsg;
}
@@ -353,7 +368,7 @@ static int run_git_commit(const char *defmsg)
return run_command_v_opt(args, RUN_GIT_CMD);
}
-static int do_pick_commit(struct commit *commit)
+static int do_pick_commit(struct commit *commit, struct replay_opts *opts)
{
unsigned char head[20];
struct commit *base, *next, *parent;
@@ -363,7 +378,7 @@ static int do_pick_commit(struct commit *commit)
struct strbuf msgbuf = STRBUF_INIT;
int res;
- if (no_commit) {
+ if (opts->no_commit) {
/*
* We do not intend to commit immediately. We just want to
* merge the differences in, so let's compute the tree
@@ -388,25 +403,25 @@ static int do_pick_commit(struct commit *commit)
int cnt;
struct commit_list *p;
- if (!mainline)
+ if (!opts->mainline)
return error(_("Commit %s is a merge but no -m option was given."),
sha1_to_hex(commit->object.sha1));
for (cnt = 1, p = commit->parents;
- cnt != mainline && p;
+ cnt != opts->mainline && p;
cnt++)
p = p->next;
- if (cnt != mainline || !p)
+ if (cnt != opts->mainline || !p)
return error(_("Commit %s does not have parent %d"),
- sha1_to_hex(commit->object.sha1), mainline);
+ sha1_to_hex(commit->object.sha1), opts->mainline);
parent = p->item;
- } else if (0 < mainline)
+ } else if (0 < opts->mainline)
return error(_("Mainline was specified but commit %s is not a merge."),
sha1_to_hex(commit->object.sha1));
else
parent = commit->parents->item;
- if (allow_ff && parent && !hashcmp(parent->object.sha1, head))
+ if (opts->allow_ff && parent && !hashcmp(parent->object.sha1, head))
return fast_forward_to(commit->object.sha1, head);
if (parent && parse_commit(parent) < 0)
@@ -428,7 +443,7 @@ static int do_pick_commit(struct commit *commit)
defmsg = git_pathdup("MERGE_MSG");
- if (action == REVERT) {
+ if (opts->action == REVERT) {
base = commit;
base_label = msg.label;
next = parent;
@@ -455,18 +470,18 @@ static int do_pick_commit(struct commit *commit)
p = p ? p + 2 : sha1_to_hex(commit->object.sha1);
strbuf_addstr(&msgbuf, p);
- if (record_origin) {
+ if (opts->record_origin) {
strbuf_addstr(&msgbuf, "(cherry picked from commit ");
strbuf_addstr(&msgbuf, sha1_to_hex(commit->object.sha1));
strbuf_addstr(&msgbuf, ")\n");
}
- if (!no_commit)
+ if (!opts->no_commit)
write_cherry_pick_head(sha1_to_hex(commit->object.sha1));
}
- if (!strategy || !strcmp(strategy, "recursive") || action == REVERT) {
+ if (!opts->strategy || !strcmp(opts->strategy, "recursive") || opts->action == REVERT) {
res = do_recursive_merge(base, next, base_label, next_label,
- head, &msgbuf);
+ head, &msgbuf, opts);
write_message(&msgbuf, defmsg);
} else {
struct commit_list *common = NULL;
@@ -476,23 +491,23 @@ static int do_pick_commit(struct commit *commit)
commit_list_insert(base, &common);
commit_list_insert(next, &remotes);
- res = try_merge_command(strategy, xopts_nr, xopts, common,
- sha1_to_hex(head), remotes);
+ res = try_merge_command(opts->strategy, opts->xopts_nr, opts->xopts,
+ common, sha1_to_hex(head), remotes);
free_commit_list(common);
free_commit_list(remotes);
}
if (res) {
- error(action == REVERT
+ error(opts->action == REVERT
? _("could not revert %s... %s")
: _("could not apply %s... %s"),
find_unique_abbrev(commit->object.sha1, DEFAULT_ABBREV),
msg.subject);
print_advice();
- rerere(allow_rerere_auto);
+ rerere(opts->allow_rerere_auto);
} else {
- if (!no_commit)
- res = run_git_commit(defmsg);
+ if (!opts->no_commit)
+ res = run_git_commit(defmsg, opts);
}
free_message(&msg);
@@ -501,18 +516,18 @@ static int do_pick_commit(struct commit *commit)
return res;
}
-static void prepare_revs(struct rev_info *revs)
+static void prepare_revs(struct rev_info *revs, struct replay_opts *opts)
{
int argc;
init_revisions(revs, NULL);
revs->no_walk = 1;
- if (action != REVERT)
+ if (opts->action != REVERT)
revs->reverse = 1;
- argc = setup_revisions(commit_argc, commit_argv, revs, NULL);
+ argc = setup_revisions(opts->commit_argc, opts->commit_argv, revs, NULL);
if (argc > 1)
- usage(*revert_or_cherry_pick_usage());
+ usage(*revert_or_cherry_pick_usage(opts));
if (prepare_revision_walk(revs))
die(_("revision walk setup failed"));
@@ -521,7 +536,7 @@ static void prepare_revs(struct rev_info *revs)
die(_("empty commit set passed"));
}
-static void read_and_refresh_cache(const char *me)
+static void read_and_refresh_cache(const char *me, struct replay_opts *opts)
{
static struct lock_file index_lock;
int index_fd = hold_locked_index(&index_lock, 0);
@@ -536,33 +551,34 @@ static void read_and_refresh_cache(const char *me)
rollback_lock_file(&index_lock);
}
-static int revert_or_cherry_pick(int argc, const char **argv)
+static int revert_or_cherry_pick(int argc, const char **argv,
+ struct replay_opts *opts)
{
struct rev_info revs;
struct commit *commit;
git_config(git_default_config, NULL);
- me = action == REVERT ? "revert" : "cherry-pick";
+ me = opts->action == REVERT ? "revert" : "cherry-pick";
setenv(GIT_REFLOG_ACTION, me, 0);
- parse_args(argc, argv);
+ parse_args(argc, argv, opts);
- if (allow_ff) {
- if (signoff)
+ if (opts->allow_ff) {
+ if (opts->signoff)
die(_("cherry-pick --ff cannot be used with --signoff"));
- if (no_commit)
+ if (opts->no_commit)
die(_("cherry-pick --ff cannot be used with --no-commit"));
- if (record_origin)
+ if (opts->record_origin)
die(_("cherry-pick --ff cannot be used with -x"));
- if (edit)
+ if (opts->edit)
die(_("cherry-pick --ff cannot be used with --edit"));
}
- read_and_refresh_cache(me);
+ read_and_refresh_cache(me, opts);
- prepare_revs(&revs);
+ prepare_revs(&revs, opts);
while ((commit = get_revision(&revs))) {
- int res = do_pick_commit(commit);
+ int res = do_pick_commit(commit, opts);
if (res)
return res;
}
@@ -573,10 +589,13 @@ static int revert_or_cherry_pick(int argc, const char **argv)
int cmd_revert(int argc, const char **argv, const char *prefix)
{
int res;
+ struct replay_opts opts;
+
+ memset(&opts, 0, sizeof(struct replay_opts));
if (isatty(0))
- edit = 1;
- action = REVERT;
- res = revert_or_cherry_pick(argc, argv);
+ opts.edit = 1;
+ opts.action = REVERT;
+ res = revert_or_cherry_pick(argc, argv, &opts);
if (res > 0)
/* Exit status from conflict */
return res;
@@ -589,8 +608,11 @@ int cmd_revert(int argc, const char **argv, const char *prefix)
int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
{
int res;
- action = CHERRY_PICK;
- res = revert_or_cherry_pick(argc, argv);
+ struct replay_opts opts;
+
+ memset(&opts, 0, sizeof(struct replay_opts));
+ opts.action = CHERRY_PICK;
+ res = revert_or_cherry_pick(argc, argv, &opts);
if (res > 0)
return res;
if (res < 0)
--
1.7.5.GIT
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