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-rw-r--r--builtin/revert.c850
1 files changed, 685 insertions, 165 deletions
diff --git a/builtin/revert.c b/builtin/revert.c
index 3117776..1ea525c 100644
--- a/builtin/revert.c
+++ b/builtin/revert.c
@@ -13,6 +13,8 @@
#include "rerere.h"
#include "merge-recursive.h"
#include "refs.h"
+#include "dir.h"
+#include "sequencer.h"
/*
* This implements the builtins revert and cherry-pick.
@@ -27,85 +29,201 @@
static const char * const revert_usage[] = {
"git revert [options] <commit-ish>",
+ "git revert <subcommand>",
NULL
};
static const char * const cherry_pick_usage[] = {
"git cherry-pick [options] <commit-ish>",
+ "git cherry-pick <subcommand>",
NULL
};
-static int edit, no_replay, no_commit, mainline, signoff, allow_ff;
-static enum { REVERT, CHERRY_PICK } action;
-static struct commit *commit;
-static int commit_argc;
-static const char **commit_argv;
-static int allow_rerere_auto;
-
-static const char *me;
+enum replay_action { REVERT, CHERRY_PICK };
+enum replay_subcommand {
+ REPLAY_NONE,
+ REPLAY_REMOVE_STATE,
+ REPLAY_CONTINUE,
+ REPLAY_ROLLBACK
+};
-/* Merge strategy. */
-static const char *strategy;
-static const char **xopts;
-static size_t xopts_nr, xopts_alloc;
+struct replay_opts {
+ enum replay_action action;
+ enum replay_subcommand subcommand;
+
+ /* 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 const char *action_name(const struct replay_opts *opts)
+{
+ return opts->action == REVERT ? "revert" : "cherry-pick";
+}
+
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 verify_opt_compatible(const char *me, const char *base_opt, ...)
{
- const char * const * usage_str = revert_or_cherry_pick_usage();
- int noop;
+ 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 verify_opt_mutually_compatible(const char *me, ...)
+{
+ const char *opt1, *opt2 = NULL;
+ va_list ap;
+
+ va_start(ap, me);
+ while ((opt1 = va_arg(ap, const char *))) {
+ if (va_arg(ap, int))
+ break;
+ }
+ if (opt1) {
+ while ((opt2 = va_arg(ap, const char *))) {
+ if (va_arg(ap, int))
+ break;
+ }
+ }
+
+ if (opt1 && opt2)
+ die(_("%s: %s cannot be used with %s"), me, opt1, opt2);
+}
+
+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 remove_state = 0;
+ int contin = 0;
+ int rollback = 0;
struct option options[] = {
- OPT_BOOLEAN('n', "no-commit", &no_commit, "don't automatically commit"),
- OPT_BOOLEAN('e', "edit", &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(0, "quit", &remove_state, "end revert or cherry-pick sequence"),
+ OPT_BOOLEAN(0, "continue", &contin, "resume revert or cherry-pick sequence"),
+ OPT_BOOLEAN(0, "abort", &rollback, "cancel revert or cherry-pick sequence"),
+ OPT_BOOLEAN('n', "no-commit", &opts->no_commit, "don't automatically commit"),
+ OPT_BOOLEAN('e', "edit", &opts->edit, "edit the commit message"),
+ OPT_NOOP_NOARG('r', NULL),
+ 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, &no_replay, "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);
+
+ /* Check for incompatible subcommands */
+ verify_opt_mutually_compatible(me,
+ "--quit", remove_state,
+ "--continue", contin,
+ "--abort", rollback,
+ NULL);
+
+ /* Set the subcommand */
+ if (remove_state)
+ opts->subcommand = REPLAY_REMOVE_STATE;
+ else if (contin)
+ opts->subcommand = REPLAY_CONTINUE;
+ else if (rollback)
+ 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);
+ }
+
+ else if (opts->commit_argc < 2)
usage_with_options(usage_str, options);
- commit_argv = argv;
+ 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);
+ opts->commit_argv = argv;
}
struct commit_message {
@@ -116,25 +234,25 @@ struct commit_message {
const char *message;
};
-static int get_message(const char *raw_message, struct commit_message *out)
+static int get_message(struct commit *commit, struct commit_message *out)
{
const char *encoding;
const char *abbrev, *subject;
int abbrev_len, subject_len;
char *q;
- if (!raw_message)
+ if (!commit->buffer)
return -1;
- encoding = get_encoding(raw_message);
+ encoding = get_encoding(commit->buffer);
if (!encoding)
encoding = "UTF-8";
if (!git_commit_encoding)
git_commit_encoding = "UTF-8";
out->reencoded_message = NULL;
- out->message = raw_message;
+ out->message = commit->buffer;
if (strcmp(encoding, git_commit_encoding))
- out->reencoded_message = reencode_string(raw_message,
+ out->reencoded_message = reencode_string(commit->buffer,
git_commit_encoding, encoding);
if (out->reencoded_message)
out->message = out->reencoded_message;
@@ -167,9 +285,6 @@ static char *get_encoding(const char *message)
{
const char *p = message, *eol;
- if (!p)
- die (_("Could not read commit message of %s"),
- sha1_to_hex(commit->object.sha1));
while (*p && *p != '\n') {
for (eol = p + 1; *eol && *eol != '\n'; eol++)
; /* do nothing */
@@ -185,45 +300,24 @@ static char *get_encoding(const char *message)
return NULL;
}
-static void add_message_to_msg(struct strbuf *msgbuf, const char *message)
-{
- const char *p = message;
- while (*p && (*p != '\n' || p[1] != '\n'))
- p++;
-
- if (!*p)
- strbuf_addstr(msgbuf, sha1_to_hex(commit->object.sha1));
-
- p += 2;
- strbuf_addstr(msgbuf, p);
-}
-
-static void write_cherry_pick_head(void)
+static void write_cherry_pick_head(struct commit *commit, const char *pseudoref)
{
+ const char *filename;
int fd;
struct strbuf buf = STRBUF_INIT;
strbuf_addf(&buf, "%s\n", sha1_to_hex(commit->object.sha1));
- fd = open(git_path("CHERRY_PICK_HEAD"), O_WRONLY | O_CREAT, 0666);
+ filename = git_path("%s", pseudoref);
+ fd = open(filename, O_WRONLY | O_CREAT, 0666);
if (fd < 0)
- die_errno(_("Could not open '%s' for writing"),
- git_path("CHERRY_PICK_HEAD"));
+ die_errno(_("Could not open '%s' for writing"), filename);
if (write_in_full(fd, buf.buf, buf.len) != buf.len || close(fd))
- die_errno(_("Could not write to '%s'"), git_path("CHERRY_PICK_HEAD"));
+ die_errno(_("Could not write to '%s'"), filename);
strbuf_release(&buf);
}
-static void advise(const char *advice, ...)
-{
- va_list params;
-
- va_start(params, advice);
- vreportf("hint: ", advice, params);
- va_end(params);
-}
-
-static void print_advice(void)
+static void print_advice(int show_hint)
{
char *msg = getenv("GIT_CHERRY_PICK_HELP");
@@ -238,9 +332,11 @@ static void print_advice(void)
return;
}
- advise("after resolving the conflicts, mark the corrected paths");
- advise("with 'git add <paths>' or 'git rm <paths>'");
- advise("and commit the result with 'git commit'");
+ if (show_hint) {
+ advise("after resolving the conflicts, mark the corrected paths");
+ advise("with 'git add <paths>' or 'git rm <paths>'");
+ advise("and commit the result with 'git commit'");
+ }
}
static void write_message(struct strbuf *msgbuf, const char *filename)
@@ -250,7 +346,7 @@ static void write_message(struct strbuf *msgbuf, const char *filename)
int msg_fd = hold_lock_file_for_update(&msg_file, filename,
LOCK_DIE_ON_ERROR);
if (write_in_full(msg_fd, msgbuf->buf, msgbuf->len) < 0)
- die_errno(_("Could not write to %s."), filename);
+ die_errno(_("Could not write to %s"), filename);
strbuf_release(msgbuf);
if (commit_lock_file(&msg_file) < 0)
die(_("Error wrapping up %s"), filename);
@@ -261,25 +357,20 @@ static struct tree *empty_tree(void)
return lookup_tree((const unsigned char *)EMPTY_TREE_SHA1_BIN);
}
-static NORETURN void die_dirty_index(const char *me)
+static int error_dirty_index(struct replay_opts *opts)
{
- if (read_cache_unmerged()) {
- die_resolve_conflict(me);
- } else {
- if (advice_commit_before_merge) {
- if (action == REVERT)
- die(_("Your local changes would be overwritten by revert.\n"
- "Please, commit your changes or stash them to proceed."));
- else
- die(_("Your local changes would be overwritten by cherry-pick.\n"
- "Please, commit your changes or stash them to proceed."));
- } else {
- if (action == REVERT)
- die(_("Your local changes would be overwritten by revert.\n"));
- else
- die(_("Your local changes would be overwritten by cherry-pick.\n"));
- }
- }
+ if (read_cache_unmerged())
+ return error_resolve_conflict(action_name(opts));
+
+ /* Different translation strings for cherry-pick and revert */
+ if (opts->action == CHERRY_PICK)
+ error(_("Your local changes would be overwritten by cherry-pick."));
+ else
+ error(_("Your local changes would be overwritten by revert."));
+
+ if (advice_commit_before_merge)
+ advise(_("Commit your changes or stash them to proceed."));
+ return -1;
}
static int fast_forward_to(const unsigned char *to, const unsigned char *from)
@@ -295,7 +386,8 @@ 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;
@@ -316,7 +408,7 @@ 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,
@@ -327,7 +419,7 @@ static int do_recursive_merge(struct commit *base, struct commit *next,
(write_cache(index_fd, active_cache, active_nr) ||
commit_locked_index(&index_lock)))
/* TRANSLATORS: %s will be "revert" or "cherry-pick" */
- die(_("%s: Unable to write new index file"), me);
+ die(_("%s: Unable to write new index file"), action_name(opts));
rollback_lock_file(&index_lock);
if (!clean) {
@@ -356,7 +448,7 @@ 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];
@@ -364,9 +456,9 @@ 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;
}
@@ -375,7 +467,7 @@ static int run_git_commit(const char *defmsg)
return run_command_v_opt(args, RUN_GIT_CMD);
}
-static int do_pick_commit(void)
+static int do_pick_commit(struct commit *commit, struct replay_opts *opts)
{
unsigned char head[20];
struct commit *base, *next, *parent;
@@ -385,7 +477,7 @@ static int do_pick_commit(void)
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
@@ -396,9 +488,9 @@ static int do_pick_commit(void)
die (_("Your index file is unmerged."));
} else {
if (get_sha1("HEAD", head))
- die (_("You do not have a valid HEAD"));
+ return error(_("You do not have a valid HEAD"));
if (index_differs_from("HEAD", 0))
- die_dirty_index(me);
+ return error_dirty_index(opts);
}
discard_cache();
@@ -410,36 +502,36 @@ static int do_pick_commit(void)
int cnt;
struct commit_list *p;
- if (!mainline)
- die(_("Commit %s is a merge but no -m option was given."),
- sha1_to_hex(commit->object.sha1));
+ 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)
- die(_("Commit %s does not have parent %d"),
- sha1_to_hex(commit->object.sha1), mainline);
+ if (cnt != opts->mainline || !p)
+ return error(_("Commit %s does not have parent %d"),
+ sha1_to_hex(commit->object.sha1), opts->mainline);
parent = p->item;
- } else if (0 < mainline)
- die(_("Mainline was specified but commit %s is not a merge."),
- sha1_to_hex(commit->object.sha1));
+ } 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)
/* TRANSLATORS: The first %s will be "revert" or
"cherry-pick", the second %s a SHA1 */
- die(_("%s: cannot parse parent commit %s"),
- me, sha1_to_hex(parent->object.sha1));
+ return error(_("%s: cannot parse parent commit %s"),
+ action_name(opts), sha1_to_hex(parent->object.sha1));
- if (get_message(commit->buffer, &msg) != 0)
- die(_("Cannot get commit message for %s"),
- sha1_to_hex(commit->object.sha1));
+ if (get_message(commit, &msg) != 0)
+ return error(_("Cannot get commit message for %s"),
+ sha1_to_hex(commit->object.sha1));
/*
* "commit" is an existing commit. We would want to apply
@@ -450,7 +542,7 @@ static int do_pick_commit(void)
defmsg = git_pathdup("MERGE_MSG");
- if (action == REVERT) {
+ if (opts->action == REVERT) {
base = commit;
base_label = msg.label;
next = parent;
@@ -466,23 +558,34 @@ static int do_pick_commit(void)
}
strbuf_addstr(&msgbuf, ".\n");
} else {
+ const char *p;
+
base = parent;
base_label = msg.parent_label;
next = commit;
next_label = msg.label;
- add_message_to_msg(&msgbuf, msg.message);
- if (no_replay) {
+
+ /*
+ * Append the commit log message to msgbuf; it starts
+ * after the tree, parent, author, committer
+ * information followed by "\n\n".
+ */
+ p = strstr(msg.message, "\n\n");
+ if (p) {
+ p += 2;
+ strbuf_addstr(&msgbuf, p);
+ }
+
+ 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)
- write_cherry_pick_head();
}
- 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;
@@ -492,23 +595,34 @@ static int do_pick_commit(void)
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 the merge was clean or if it failed due to conflict, we write
+ * CHERRY_PICK_HEAD for the subsequent invocation of commit to use.
+ * However, if the merge did not even start, then we don't want to
+ * write it at all.
+ */
+ if (opts->action == CHERRY_PICK && !opts->no_commit && (res == 0 || res == 1))
+ write_cherry_pick_head(commit, "CHERRY_PICK_HEAD");
+ if (opts->action == REVERT && ((opts->no_commit && res == 0) || res == 1))
+ write_cherry_pick_head(commit, "REVERT_HEAD");
+
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);
+ print_advice(res == 1);
+ 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);
@@ -517,18 +631,18 @@ static int do_pick_commit(void)
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"));
@@ -537,64 +651,470 @@ 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(struct replay_opts *opts)
{
static struct lock_file index_lock;
int index_fd = hold_locked_index(&index_lock, 0);
if (read_index_preload(&the_index, NULL) < 0)
- die(_("git %s: failed to read the index"), me);
+ die(_("git %s: failed to read the index"), action_name(opts));
refresh_index(&the_index, REFRESH_QUIET|REFRESH_UNMERGED, NULL, NULL, NULL);
if (the_index.cache_changed) {
if (write_index(&the_index, index_fd) ||
commit_locked_index(&index_lock))
- die(_("git %s: failed to refresh the index"), me);
+ die(_("git %s: failed to refresh the index"), action_name(opts));
}
rollback_lock_file(&index_lock);
}
-static int revert_or_cherry_pick(int argc, const char **argv)
+/*
+ * Append a commit to the end of the commit_list.
+ *
+ * next starts by pointing to the variable that holds the head of an
+ * empty commit_list, and is updated to point to the "next" field of
+ * the last item on the list as new commits are appended.
+ *
+ * Usage example:
+ *
+ * struct commit_list *list;
+ * struct commit_list **next = &list;
+ *
+ * next = commit_list_append(c1, next);
+ * next = commit_list_append(c2, next);
+ * assert(commit_list_count(list) == 2);
+ * return list;
+ */
+static struct commit_list **commit_list_append(struct commit *commit,
+ struct commit_list **next)
+{
+ struct commit_list *new = xmalloc(sizeof(struct commit_list));
+ new->item = commit;
+ *next = new;
+ new->next = NULL;
+ return &new->next;
+}
+
+static int format_todo(struct strbuf *buf, struct commit_list *todo_list,
+ struct replay_opts *opts)
+{
+ struct commit_list *cur = NULL;
+ struct commit_message msg = { NULL, NULL, NULL, NULL, NULL };
+ const char *sha1_abbrev = NULL;
+ const char *action_str = opts->action == REVERT ? "revert" : "pick";
+
+ for (cur = todo_list; cur; cur = cur->next) {
+ sha1_abbrev = find_unique_abbrev(cur->item->object.sha1, DEFAULT_ABBREV);
+ if (get_message(cur->item, &msg))
+ return error(_("Cannot get commit message for %s"), sha1_abbrev);
+ strbuf_addf(buf, "%s %s %s\n", action_str, sha1_abbrev, msg.subject);
+ }
+ return 0;
+}
+
+static struct commit *parse_insn_line(char *start, struct replay_opts *opts)
+{
+ unsigned char commit_sha1[20];
+ char sha1_abbrev[40];
+ enum replay_action action;
+ int insn_len = 0;
+ char *p, *q;
+
+ if (!prefixcmp(start, "pick ")) {
+ action = CHERRY_PICK;
+ insn_len = strlen("pick");
+ p = start + insn_len + 1;
+ } else if (!prefixcmp(start, "revert ")) {
+ action = REVERT;
+ insn_len = strlen("revert");
+ p = start + insn_len + 1;
+ } else
+ return NULL;
+
+ q = strchr(p, ' ');
+ if (!q)
+ return NULL;
+ q++;
+
+ strlcpy(sha1_abbrev, p, q - p);
+
+ /*
+ * Verify that the action matches up with the one in
+ * opts; we don't support arbitrary instructions
+ */
+ if (action != opts->action) {
+ const char *action_str;
+ action_str = action == REVERT ? "revert" : "cherry-pick";
+ error(_("Cannot %s during a %s"), action_str, action_name(opts));
+ return NULL;
+ }
+
+ if (get_sha1(sha1_abbrev, commit_sha1) < 0)
+ return NULL;
+
+ return lookup_commit_reference(commit_sha1);
+}
+
+static int parse_insn_buffer(char *buf, struct commit_list **todo_list,
+ struct replay_opts *opts)
+{
+ struct commit_list **next = todo_list;
+ struct commit *commit;
+ char *p = buf;
+ int i;
+
+ for (i = 1; *p; i++) {
+ commit = parse_insn_line(p, opts);
+ if (!commit)
+ return error(_("Could not parse line %d."), i);
+ next = commit_list_append(commit, next);
+ p = strchrnul(p, '\n');
+ if (*p)
+ p++;
+ }
+ if (!*todo_list)
+ return error(_("No commits parsed."));
+ return 0;
+}
+
+static void read_populate_todo(struct commit_list **todo_list,
+ struct replay_opts *opts)
+{
+ const char *todo_file = git_path(SEQ_TODO_FILE);
+ struct strbuf buf = STRBUF_INIT;
+ int fd, res;
+
+ fd = open(todo_file, O_RDONLY);
+ if (fd < 0)
+ die_errno(_("Could not open %s"), todo_file);
+ if (strbuf_read(&buf, fd, 0) < 0) {
+ close(fd);
+ strbuf_release(&buf);
+ die(_("Could not read %s."), todo_file);
+ }
+ close(fd);
+
+ res = parse_insn_buffer(buf.buf, todo_list, opts);
+ strbuf_release(&buf);
+ if (res)
+ die(_("Unusable instruction sheet: %s"), todo_file);
+}
+
+static int populate_opts_cb(const char *key, const char *value, void *data)
+{
+ struct replay_opts *opts = data;
+ int error_flag = 1;
+
+ if (!value)
+ error_flag = 0;
+ else if (!strcmp(key, "options.no-commit"))
+ opts->no_commit = git_config_bool_or_int(key, value, &error_flag);
+ else if (!strcmp(key, "options.edit"))
+ opts->edit = git_config_bool_or_int(key, value, &error_flag);
+ else if (!strcmp(key, "options.signoff"))
+ opts->signoff = git_config_bool_or_int(key, value, &error_flag);
+ else if (!strcmp(key, "options.record-origin"))
+ opts->record_origin = git_config_bool_or_int(key, value, &error_flag);
+ else if (!strcmp(key, "options.allow-ff"))
+ opts->allow_ff = git_config_bool_or_int(key, value, &error_flag);
+ else if (!strcmp(key, "options.mainline"))
+ opts->mainline = git_config_int(key, value);
+ else if (!strcmp(key, "options.strategy"))
+ git_config_string(&opts->strategy, key, value);
+ else if (!strcmp(key, "options.strategy-option")) {
+ ALLOC_GROW(opts->xopts, opts->xopts_nr + 1, opts->xopts_alloc);
+ opts->xopts[opts->xopts_nr++] = xstrdup(value);
+ } else
+ return error(_("Invalid key: %s"), key);
+
+ if (!error_flag)
+ return error(_("Invalid value for %s: %s"), key, value);
+
+ return 0;
+}
+
+static void read_populate_opts(struct replay_opts **opts_ptr)
+{
+ const char *opts_file = git_path(SEQ_OPTS_FILE);
+
+ if (!file_exists(opts_file))
+ return;
+ if (git_config_from_file(populate_opts_cb, opts_file, *opts_ptr) < 0)
+ die(_("Malformed options sheet: %s"), opts_file);
+}
+
+static void walk_revs_populate_todo(struct commit_list **todo_list,
+ struct replay_opts *opts)
{
struct rev_info revs;
+ struct commit *commit;
+ struct commit_list **next;
- git_config(git_default_config, NULL);
- me = action == REVERT ? "revert" : "cherry-pick";
- setenv(GIT_REFLOG_ACTION, me, 0);
- parse_args(argc, argv);
+ prepare_revs(&revs, opts);
+
+ next = todo_list;
+ while ((commit = get_revision(&revs)))
+ next = commit_list_append(commit, next);
+}
+
+static int create_seq_dir(void)
+{
+ const char *seq_dir = git_path(SEQ_DIR);
- if (allow_ff) {
- if (signoff)
- die(_("cherry-pick --ff cannot be used with --signoff"));
- if (no_commit)
- die(_("cherry-pick --ff cannot be used with --no-commit"));
- if (no_replay)
- die(_("cherry-pick --ff cannot be used with -x"));
- if (edit)
- die(_("cherry-pick --ff cannot be used with --edit"));
+ if (file_exists(seq_dir)) {
+ error(_("a cherry-pick or revert is already in progress"));
+ advise(_("try \"git cherry-pick (--continue | --quit | --abort)\""));
+ return -1;
}
+ else if (mkdir(seq_dir, 0777) < 0)
+ die_errno(_("Could not create sequencer directory %s"), seq_dir);
+ return 0;
+}
- read_and_refresh_cache(me);
+static void save_head(const char *head)
+{
+ const char *head_file = git_path(SEQ_HEAD_FILE);
+ static struct lock_file head_lock;
+ struct strbuf buf = STRBUF_INIT;
+ int fd;
+
+ fd = hold_lock_file_for_update(&head_lock, head_file, LOCK_DIE_ON_ERROR);
+ strbuf_addf(&buf, "%s\n", head);
+ if (write_in_full(fd, buf.buf, buf.len) < 0)
+ die_errno(_("Could not write to %s"), head_file);
+ if (commit_lock_file(&head_lock) < 0)
+ die(_("Error wrapping up %s."), head_file);
+}
+
+static int reset_for_rollback(const unsigned char *sha1)
+{
+ const char *argv[4]; /* reset --merge <arg> + NULL */
+ argv[0] = "reset";
+ argv[1] = "--merge";
+ argv[2] = sha1_to_hex(sha1);
+ argv[3] = NULL;
+ return run_command_v_opt(argv, RUN_GIT_CMD);
+}
+
+static int rollback_single_pick(void)
+{
+ unsigned char head_sha1[20];
+
+ if (!file_exists(git_path("CHERRY_PICK_HEAD")) &&
+ !file_exists(git_path("REVERT_HEAD")))
+ return error(_("no cherry-pick or revert in progress"));
+ if (!resolve_ref("HEAD", head_sha1, 0, NULL))
+ return error(_("cannot resolve HEAD"));
+ if (is_null_sha1(head_sha1))
+ return error(_("cannot abort from a branch yet to be born"));
+ return reset_for_rollback(head_sha1);
+}
+
+static int sequencer_rollback(struct replay_opts *opts)
+{
+ const char *filename;
+ FILE *f;
+ unsigned char sha1[20];
+ struct strbuf buf = STRBUF_INIT;
- prepare_revs(&revs);
+ filename = git_path(SEQ_HEAD_FILE);
+ f = fopen(filename, "r");
+ if (!f && errno == ENOENT) {
+ /*
+ * There is no multiple-cherry-pick in progress.
+ * If CHERRY_PICK_HEAD or REVERT_HEAD indicates
+ * a single-cherry-pick in progress, abort that.
+ */
+ return rollback_single_pick();
+ }
+ if (!f)
+ return error(_("cannot open %s: %s"), filename,
+ strerror(errno));
+ if (strbuf_getline(&buf, f, '\n')) {
+ error(_("cannot read %s: %s"), filename, ferror(f) ?
+ strerror(errno) : _("unexpected end of file"));
+ fclose(f);
+ goto fail;
+ }
+ fclose(f);
+ if (get_sha1_hex(buf.buf, sha1) || buf.buf[40] != '\0') {
+ error(_("stored pre-cherry-pick HEAD file '%s' is corrupt"),
+ filename);
+ goto fail;
+ }
+ if (reset_for_rollback(sha1))
+ goto fail;
+ remove_sequencer_state(1);
+ strbuf_release(&buf);
+ return 0;
+fail:
+ strbuf_release(&buf);
+ return -1;
+}
- while ((commit = get_revision(&revs))) {
- int res = do_pick_commit();
- if (res)
+static void save_todo(struct commit_list *todo_list, struct replay_opts *opts)
+{
+ const char *todo_file = git_path(SEQ_TODO_FILE);
+ static struct lock_file todo_lock;
+ struct strbuf buf = STRBUF_INIT;
+ int fd;
+
+ fd = hold_lock_file_for_update(&todo_lock, todo_file, LOCK_DIE_ON_ERROR);
+ if (format_todo(&buf, todo_list, opts) < 0)
+ die(_("Could not format %s."), todo_file);
+ if (write_in_full(fd, buf.buf, buf.len) < 0) {
+ strbuf_release(&buf);
+ die_errno(_("Could not write to %s"), todo_file);
+ }
+ if (commit_lock_file(&todo_lock) < 0) {
+ strbuf_release(&buf);
+ die(_("Error wrapping up %s."), todo_file);
+ }
+ strbuf_release(&buf);
+}
+
+static void save_opts(struct replay_opts *opts)
+{
+ const char *opts_file = git_path(SEQ_OPTS_FILE);
+
+ if (opts->no_commit)
+ git_config_set_in_file(opts_file, "options.no-commit", "true");
+ if (opts->edit)
+ git_config_set_in_file(opts_file, "options.edit", "true");
+ if (opts->signoff)
+ git_config_set_in_file(opts_file, "options.signoff", "true");
+ if (opts->record_origin)
+ git_config_set_in_file(opts_file, "options.record-origin", "true");
+ if (opts->allow_ff)
+ git_config_set_in_file(opts_file, "options.allow-ff", "true");
+ if (opts->mainline) {
+ struct strbuf buf = STRBUF_INIT;
+ strbuf_addf(&buf, "%d", opts->mainline);
+ git_config_set_in_file(opts_file, "options.mainline", buf.buf);
+ strbuf_release(&buf);
+ }
+ if (opts->strategy)
+ git_config_set_in_file(opts_file, "options.strategy", opts->strategy);
+ if (opts->xopts) {
+ int i;
+ for (i = 0; i < opts->xopts_nr; i++)
+ git_config_set_multivar_in_file(opts_file,
+ "options.strategy-option",
+ opts->xopts[i], "^$", 0);
+ }
+}
+
+static int pick_commits(struct commit_list *todo_list, struct replay_opts *opts)
+{
+ struct commit_list *cur;
+ int res;
+
+ setenv(GIT_REFLOG_ACTION, action_name(opts), 0);
+ if (opts->allow_ff)
+ assert(!(opts->signoff || opts->no_commit ||
+ opts->record_origin || opts->edit));
+ read_and_refresh_cache(opts);
+
+ for (cur = todo_list; cur; cur = cur->next) {
+ save_todo(cur, opts);
+ res = do_pick_commit(cur->item, opts);
+ if (res) {
+ if (!cur->next)
+ /*
+ * An error was encountered while
+ * picking the last commit; the
+ * sequencer state is useless now --
+ * the user simply needs to resolve
+ * the conflict and commit
+ */
+ remove_sequencer_state(0);
return res;
+ }
}
+ /*
+ * Sequence of picks finished successfully; cleanup by
+ * removing the .git/sequencer directory
+ */
+ remove_sequencer_state(1);
return 0;
}
+static int pick_revisions(struct replay_opts *opts)
+{
+ struct commit_list *todo_list = NULL;
+ unsigned char sha1[20];
+
+ read_and_refresh_cache(opts);
+
+ /*
+ * Decide what to do depending on the arguments; a fresh
+ * cherry-pick should be handled differently from an existing
+ * one that is being continued
+ */
+ if (opts->subcommand == REPLAY_REMOVE_STATE) {
+ remove_sequencer_state(1);
+ return 0;
+ }
+ if (opts->subcommand == REPLAY_ROLLBACK)
+ return sequencer_rollback(opts);
+ if (opts->subcommand == REPLAY_CONTINUE) {
+ if (!file_exists(git_path(SEQ_TODO_FILE)))
+ return error(_("No %s in progress"), action_name(opts));
+ read_populate_opts(&opts);
+ read_populate_todo(&todo_list, opts);
+
+ /* Verify that the conflict has been resolved */
+ if (!index_differs_from("HEAD", 0))
+ todo_list = todo_list->next;
+ return pick_commits(todo_list, opts);
+ }
+
+ /*
+ * Start a new cherry-pick/ revert sequence; but
+ * first, make sure that an existing one isn't in
+ * progress
+ */
+
+ walk_revs_populate_todo(&todo_list, opts);
+ if (create_seq_dir() < 0)
+ return -1;
+ if (get_sha1("HEAD", sha1)) {
+ if (opts->action == REVERT)
+ return error(_("Can't revert as initial commit"));
+ return error(_("Can't cherry-pick into empty head"));
+ }
+ save_head(sha1_to_hex(sha1));
+ save_opts(opts);
+ return pick_commits(todo_list, opts);
+}
+
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))
- edit = 1;
- action = REVERT;
- return revert_or_cherry_pick(argc, argv);
+ opts.edit = 1;
+ opts.action = REVERT;
+ git_config(git_default_config, NULL);
+ parse_args(argc, argv, &opts);
+ res = pick_revisions(&opts);
+ if (res < 0)
+ die(_("revert failed"));
+ return res;
}
int cmd_cherry_pick(int argc, const char **argv, const char *prefix)
{
- action = CHERRY_PICK;
- return revert_or_cherry_pick(argc, argv);
+ struct replay_opts opts;
+ int res;
+
+ memset(&opts, 0, sizeof(opts));
+ opts.action = CHERRY_PICK;
+ git_config(git_default_config, NULL);
+ parse_args(argc, argv, &opts);
+ res = pick_revisions(&opts);
+ if (res < 0)
+ die(_("cherry-pick failed"));
+ return res;
}