merge(third_party/git): Merge squashed git subtree at v2.23.0 r/373

Merge commit '1b593e1ea4d2af0f6444d9a7788d5d99abd6fde5' as 'third_party/git'

1 files changed, 256 insertions, 0 deletions

diff --git a/third_party/git/builtin.h b/third_party/git/builtin.h
new file mode 100644
index 000000000000..5cf5df69f72f
--- /dev/null
+++ b/third_party/git/builtin.h
@@ -0,0 +1,256 @@
+#ifndef BUILTIN_H
+#define BUILTIN_H
+
+#include "git-compat-util.h"
+#include "strbuf.h"
+#include "cache.h"
+#include "commit.h"
+
+/*
+ * builtin API
+ * ===========
+ *
+ * Adding a new built-in
+ * ---------------------
+ *
+ * There are 4 things to do to add a built-in command implementation to
+ * Git:
+ *
+ * . Define the implementation of the built-in command `foo` with
+ *   signature:
+ *
+ *	int cmd_foo(int argc, const char **argv, const char *prefix);
+ *
+ * . Add the external declaration for the function to `builtin.h`.
+ *
+ * . Add the command to the `commands[]` table defined in `git.c`.
+ *   The entry should look like:
+ *
+ *	{ "foo", cmd_foo, <options> },
+ *
+ * where options is the bitwise-or of:
+ *
+ * `RUN_SETUP`:
+ *	If there is not a Git directory to work on, abort.  If there
+ *	is a work tree, chdir to the top of it if the command was
+ *	invoked in a subdirectory.  If there is no work tree, no
+ *	chdir() is done.
+ *
+ * `RUN_SETUP_GENTLY`:
+ *	If there is a Git directory, chdir as per RUN_SETUP, otherwise,
+ *	don't chdir anywhere.
+ *
+ * `USE_PAGER`:
+ *
+ *	If the standard output is connected to a tty, spawn a pager and
+ *	feed our output to it.
+ *
+ * `NEED_WORK_TREE`:
+ *
+ *	Make sure there is a work tree, i.e. the command cannot act
+ *	on bare repositories.
+ *	This only makes sense when `RUN_SETUP` is also set.
+ *
+ * `SUPPORT_SUPER_PREFIX`:
+ *
+ *	The built-in supports `--super-prefix`.
+ *
+ * `DELAY_PAGER_CONFIG`:
+ *
+ *	If RUN_SETUP or RUN_SETUP_GENTLY is set, git.c normally handles
+ *	the `pager.<cmd>`-configuration. If this flag is used, git.c
+ *	will skip that step, instead allowing the built-in to make a
+ *	more informed decision, e.g., by ignoring `pager.<cmd>` for
+ *	certain subcommands.
+ *
+ * . Add `builtin/foo.o` to `BUILTIN_OBJS` in `Makefile`.
+ *
+ * Additionally, if `foo` is a new command, there are 4 more things to do:
+ *
+ * . Add tests to `t/` directory.
+ *
+ * . Write documentation in `Documentation/git-foo.txt`.
+ *
+ * . Add an entry for `git-foo` to `command-list.txt`.
+ *
+ * . Add an entry for `/git-foo` to `.gitignore`.
+ *
+ *
+ * How a built-in is called
+ * ------------------------
+ *
+ * The implementation `cmd_foo()` takes three parameters, `argc`, `argv,
+ * and `prefix`.  The first two are similar to what `main()` of a
+ * standalone command would be called with.
+ *
+ * When `RUN_SETUP` is specified in the `commands[]` table, and when you
+ * were started from a subdirectory of the work tree, `cmd_foo()` is called
+ * after chdir(2) to the top of the work tree, and `prefix` gets the path
+ * to the subdirectory the command started from.  This allows you to
+ * convert a user-supplied pathname (typically relative to that directory)
+ * to a pathname relative to the top of the work tree.
+ *
+ * The return value from `cmd_foo()` becomes the exit status of the
+ * command.
+ */
+
+#define DEFAULT_MERGE_LOG_LEN 20
+
+extern const char git_usage_string[];
+extern const char git_more_info_string[];
+
+#define PRUNE_PACKED_DRY_RUN 01
+#define PRUNE_PACKED_VERBOSE 02
+
+void prune_packed_objects(int);
+
+struct fmt_merge_msg_opts {
+	unsigned add_title:1,
+		credit_people:1;
+	int shortlog_len;
+};
+
+int fmt_merge_msg(struct strbuf *in, struct strbuf *out,
+		  struct fmt_merge_msg_opts *);
+
+/**
+ * If a built-in has DELAY_PAGER_CONFIG set, the built-in should call this early
+ * when it wishes to respect the `pager.foo`-config. The `cmd` is the name of
+ * the built-in, e.g., "foo". If a paging-choice has already been setup, this
+ * does nothing. The default in `def` should be 0 for "pager off", 1 for "pager
+ * on" or -1 for "punt".
+ *
+ * You should most likely use a default of 0 or 1. "Punt" (-1) could be useful
+ * to be able to fall back to some historical compatibility name.
+ */
+void setup_auto_pager(const char *cmd, int def);
+
+int is_builtin(const char *s);
+
+int cmd_add(int argc, const char **argv, const char *prefix);
+int cmd_am(int argc, const char **argv, const char *prefix);
+int cmd_annotate(int argc, const char **argv, const char *prefix);
+int cmd_apply(int argc, const char **argv, const char *prefix);
+int cmd_archive(int argc, const char **argv, const char *prefix);
+int cmd_bisect__helper(int argc, const char **argv, const char *prefix);
+int cmd_blame(int argc, const char **argv, const char *prefix);
+int cmd_branch(int argc, const char **argv, const char *prefix);
+int cmd_bundle(int argc, const char **argv, const char *prefix);
+int cmd_cat_file(int argc, const char **argv, const char *prefix);
+int cmd_checkout(int argc, const char **argv, const char *prefix);
+int cmd_checkout_index(int argc, const char **argv, const char *prefix);
+int cmd_check_attr(int argc, const char **argv, const char *prefix);
+int cmd_check_ignore(int argc, const char **argv, const char *prefix);
+int cmd_check_mailmap(int argc, const char **argv, const char *prefix);
+int cmd_check_ref_format(int argc, const char **argv, const char *prefix);
+int cmd_cherry(int argc, const char **argv, const char *prefix);
+int cmd_cherry_pick(int argc, const char **argv, const char *prefix);
+int cmd_clone(int argc, const char **argv, const char *prefix);
+int cmd_clean(int argc, const char **argv, const char *prefix);
+int cmd_column(int argc, const char **argv, const char *prefix);
+int cmd_commit(int argc, const char **argv, const char *prefix);
+int cmd_commit_graph(int argc, const char **argv, const char *prefix);
+int cmd_commit_tree(int argc, const char **argv, const char *prefix);
+int cmd_config(int argc, const char **argv, const char *prefix);
+int cmd_count_objects(int argc, const char **argv, const char *prefix);
+int cmd_credential(int argc, const char **argv, const char *prefix);
+int cmd_describe(int argc, const char **argv, const char *prefix);
+int cmd_diff_files(int argc, const char **argv, const char *prefix);
+int cmd_diff_index(int argc, const char **argv, const char *prefix);
+int cmd_diff(int argc, const char **argv, const char *prefix);
+int cmd_diff_tree(int argc, const char **argv, const char *prefix);
+int cmd_difftool(int argc, const char **argv, const char *prefix);
+int cmd_env__helper(int argc, const char **argv, const char *prefix);
+int cmd_fast_export(int argc, const char **argv, const char *prefix);
+int cmd_fetch(int argc, const char **argv, const char *prefix);
+int cmd_fetch_pack(int argc, const char **argv, const char *prefix);
+int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix);
+int cmd_for_each_ref(int argc, const char **argv, const char *prefix);
+int cmd_format_patch(int argc, const char **argv, const char *prefix);
+int cmd_fsck(int argc, const char **argv, const char *prefix);
+int cmd_gc(int argc, const char **argv, const char *prefix);
+int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix);
+int cmd_grep(int argc, const char **argv, const char *prefix);
+int cmd_hash_object(int argc, const char **argv, const char *prefix);
+int cmd_help(int argc, const char **argv, const char *prefix);
+int cmd_index_pack(int argc, const char **argv, const char *prefix);
+int cmd_init_db(int argc, const char **argv, const char *prefix);
+int cmd_interpret_trailers(int argc, const char **argv, const char *prefix);
+int cmd_log(int argc, const char **argv, const char *prefix);
+int cmd_log_reflog(int argc, const char **argv, const char *prefix);
+int cmd_ls_files(int argc, const char **argv, const char *prefix);
+int cmd_ls_tree(int argc, const char **argv, const char *prefix);
+int cmd_ls_remote(int argc, const char **argv, const char *prefix);
+int cmd_mailinfo(int argc, const char **argv, const char *prefix);
+int cmd_mailsplit(int argc, const char **argv, const char *prefix);
+int cmd_merge(int argc, const char **argv, const char *prefix);
+int cmd_merge_base(int argc, const char **argv, const char *prefix);
+int cmd_merge_index(int argc, const char **argv, const char *prefix);
+int cmd_merge_ours(int argc, const char **argv, const char *prefix);
+int cmd_merge_file(int argc, const char **argv, const char *prefix);
+int cmd_merge_recursive(int argc, const char **argv, const char *prefix);
+int cmd_merge_tree(int argc, const char **argv, const char *prefix);
+int cmd_mktag(int argc, const char **argv, const char *prefix);
+int cmd_mktree(int argc, const char **argv, const char *prefix);
+int cmd_multi_pack_index(int argc, const char **argv, const char *prefix);
+int cmd_mv(int argc, const char **argv, const char *prefix);
+int cmd_name_rev(int argc, const char **argv, const char *prefix);
+int cmd_notes(int argc, const char **argv, const char *prefix);
+int cmd_pack_objects(int argc, const char **argv, const char *prefix);
+int cmd_pack_redundant(int argc, const char **argv, const char *prefix);
+int cmd_patch_id(int argc, const char **argv, const char *prefix);
+int cmd_prune(int argc, const char **argv, const char *prefix);
+int cmd_prune_packed(int argc, const char **argv, const char *prefix);
+int cmd_pull(int argc, const char **argv, const char *prefix);
+int cmd_push(int argc, const char **argv, const char *prefix);
+int cmd_range_diff(int argc, const char **argv, const char *prefix);
+int cmd_read_tree(int argc, const char **argv, const char *prefix);
+int cmd_rebase(int argc, const char **argv, const char *prefix);
+int cmd_rebase__interactive(int argc, const char **argv, const char *prefix);
+int cmd_receive_pack(int argc, const char **argv, const char *prefix);
+int cmd_reflog(int argc, const char **argv, const char *prefix);
+int cmd_remote(int argc, const char **argv, const char *prefix);
+int cmd_remote_ext(int argc, const char **argv, const char *prefix);
+int cmd_remote_fd(int argc, const char **argv, const char *prefix);
+int cmd_repack(int argc, const char **argv, const char *prefix);
+int cmd_rerere(int argc, const char **argv, const char *prefix);
+int cmd_reset(int argc, const char **argv, const char *prefix);
+int cmd_restore(int argc, const char **argv, const char *prefix);
+int cmd_rev_list(int argc, const char **argv, const char *prefix);
+int cmd_rev_parse(int argc, const char **argv, const char *prefix);
+int cmd_revert(int argc, const char **argv, const char *prefix);
+int cmd_rm(int argc, const char **argv, const char *prefix);
+int cmd_send_pack(int argc, const char **argv, const char *prefix);
+int cmd_shortlog(int argc, const char **argv, const char *prefix);
+int cmd_show(int argc, const char **argv, const char *prefix);
+int cmd_show_branch(int argc, const char **argv, const char *prefix);
+int cmd_show_index(int argc, const char **argv, const char *prefix);
+int cmd_status(int argc, const char **argv, const char *prefix);
+int cmd_stash(int argc, const char **argv, const char *prefix);
+int cmd_stripspace(int argc, const char **argv, const char *prefix);
+int cmd_submodule__helper(int argc, const char **argv, const char *prefix);
+int cmd_switch(int argc, const char **argv, const char *prefix);
+int cmd_symbolic_ref(int argc, const char **argv, const char *prefix);
+int cmd_tag(int argc, const char **argv, const char *prefix);
+int cmd_tar_tree(int argc, const char **argv, const char *prefix);
+int cmd_unpack_file(int argc, const char **argv, const char *prefix);
+int cmd_unpack_objects(int argc, const char **argv, const char *prefix);
+int cmd_update_index(int argc, const char **argv, const char *prefix);
+int cmd_update_ref(int argc, const char **argv, const char *prefix);
+int cmd_update_server_info(int argc, const char **argv, const char *prefix);
+int cmd_upload_archive(int argc, const char **argv, const char *prefix);
+int cmd_upload_archive_writer(int argc, const char **argv, const char *prefix);
+int cmd_upload_pack(int argc, const char **argv, const char *prefix);
+int cmd_var(int argc, const char **argv, const char *prefix);
+int cmd_verify_commit(int argc, const char **argv, const char *prefix);
+int cmd_verify_tag(int argc, const char **argv, const char *prefix);
+int cmd_version(int argc, const char **argv, const char *prefix);
+int cmd_whatchanged(int argc, const char **argv, const char *prefix);
+int cmd_worktree(int argc, const char **argv, const char *prefix);
+int cmd_write_tree(int argc, const char **argv, const char *prefix);
+int cmd_verify_pack(int argc, const char **argv, const char *prefix);
+int cmd_show_ref(int argc, const char **argv, const char *prefix);
+int cmd_pack_refs(int argc, const char **argv, const char *prefix);
+int cmd_replace(int argc, const char **argv, const char *prefix);
+
+#endif