merge(3p/git): Merge git subtree at v2.29.2 r/1890

This also bumps the stable nixpkgs to 20.09 as of 2020-11-21, because
there is some breakage in the git build related to the netrc
credentials helper which someone has taken care of in nixpkgs.

The stable channel is not used for anything other than git, so this
should be fine.

Change-Id: I3575a19dab09e1e9556cf8231d717de9890484fb

1 files changed, 34 insertions, 6 deletions

diff --git a/third_party/git/sequencer.h b/third_party/git/sequencer.h
index 6704acbb9c..b2a501e445 100644
--- a/third_party/git/sequencer.h
+++ b/third_party/git/sequencer.h
@@ -3,14 +3,15 @@
 
 #include "cache.h"
 #include "strbuf.h"
+#include "wt-status.h"
 
 struct commit;
 struct repository;
 
 const char *git_path_commit_editmsg(void);
-const char *git_path_seq_dir(void);
 const char *rebase_path_todo(void);
 const char *rebase_path_todo_backup(void);
+const char *rebase_path_dropped(void);
 
 #define APPEND_SIGNOFF_DEDUP (1u << 0)
 
@@ -39,13 +40,18 @@ struct replay_opts {
 	int allow_rerere_auto;
 	int allow_empty;
 	int allow_empty_message;
+	int drop_redundant_commits;
 	int keep_redundant_commits;
 	int verbose;
 	int quiet;
 	int reschedule_failed_exec;
+	int committer_date_is_author_date;
+	int ignore_date;
 
 	int mainline;
 
+	char *committer_name;
+	char *committer_email;
 	char *gpg_sign;
 	enum commit_msg_cleanup_mode default_msg_cleanup;
 	int explicit_cleanup;
@@ -143,13 +149,18 @@ int sequencer_remove_state(struct replay_opts *opts);
  */
 #define TODO_LIST_REBASE_COUSINS (1U << 4)
 #define TODO_LIST_APPEND_TODO_HELP (1U << 5)
+/*
+ * When generating a script that rebases merges with `--root` *and* with
+ * `--onto`, we do not want to re-generate the root commits.
+ */
+#define TODO_LIST_ROOT_WITH_ONTO (1U << 6)
+#define TODO_LIST_REAPPLY_CHERRY_PICKS (1U << 7)
 
 int sequencer_make_script(struct repository *r, struct strbuf *out, int argc,
 			  const char **argv, unsigned flags);
 
 void todo_list_add_exec_commands(struct todo_list *todo_list,
 				 struct string_list *commands);
-int check_todo_list_from_file(struct repository *r);
 int complete_action(struct repository *r, struct replay_opts *opts, unsigned flags,
 		    const char *shortrevisions, const char *onto_name,
 		    struct commit *onto, const char *orig_head, struct string_list *commands,
@@ -184,8 +195,11 @@ void commit_post_rewrite(struct repository *r,
 			 const struct commit *current_head,
 			 const struct object_id *new_head);
 
-int prepare_branch_to_be_rebased(struct repository *r, struct replay_opts *opts,
-				 const char *commit);
+void create_autostash(struct repository *r, const char *path,
+		      const char *default_reflog_action);
+int save_autostash(const char *path);
+int apply_autostash(const char *path);
+int apply_autostash_oid(const char *stash_oid);
 
 #define SUMMARY_INITIAL_COMMIT   (1 << 0)
 #define SUMMARY_SHOW_AUTHOR_DATE (1 << 1)
@@ -194,13 +208,27 @@ void print_commit_summary(struct repository *repo,
 			  const struct object_id *oid,
 			  unsigned int flags);
 
+#define READ_ONELINER_SKIP_IF_EMPTY (1 << 0)
+#define READ_ONELINER_WARN_MISSING (1 << 1)
+
+/*
+ * Reads a file that was presumably written by a shell script, i.e. with an
+ * end-of-line marker that needs to be stripped.
+ *
+ * Note that only the last end-of-line marker is stripped, consistent with the
+ * behavior of "$(cat path)" in a shell script.
+ *
+ * Returns 1 if the file was read, 0 if it could not be read or does not exist.
+ */
+int read_oneliner(struct strbuf *buf,
+	const char *path, unsigned flags);
 int read_author_script(const char *path, char **name, char **email, char **date,
 		       int allow_missing);
-#endif
-
 void parse_strategy_opts(struct replay_opts *opts, char *raw_opts);
 int write_basic_state(struct replay_opts *opts, const char *head_name,
 		      struct commit *onto, const char *orig_head);
 void sequencer_post_commit_cleanup(struct repository *r, int verbose);
 int sequencer_get_last_command(struct repository* r,
 			       enum replay_action *action);
+int sequencer_determine_whence(struct repository *r, enum commit_whence *whence);
+#endif /* SEQUENCER_H */