builtin.h

   1 #ifndef BUILTIN_H
   2 #define BUILTIN_H
   3
   4 #include "git-compat-util.h"
   5 #include "strbuf.h"
   6 #include "cache.h"
   7 #include "commit.h"
   8
   9 /*
  10  * builtin API
  11  * ===========
  12  *
  13  * Adding a new built-in
  14  * ---------------------
  15  *
  16  * There are 4 things to do to add a built-in command implementation to
  17  * Git:
  18  *
  19  * . Define the implementation of the built-in command `foo` with
  20  *   signature:
  21  *
  22  *      int cmd_foo(int argc, const char **argv, const char *prefix);
  23  *
  24  * . Add the external declaration for the function to `builtin.h`.
  25  *
  26  * . Add the command to the `commands[]` table defined in `git.c`.
  27  *   The entry should look like:
  28  *
  29  *      { "foo", cmd_foo, <options> },
  30  *
  31  * where options is the bitwise-or of:
  32  *
  33  * `RUN_SETUP`:
  34  *      If there is not a Git directory to work on, abort.  If there
  35  *      is a work tree, chdir to the top of it if the command was
  36  *      invoked in a subdirectory.  If there is no work tree, no
  37  *      chdir() is done.
  38  *
  39  * `RUN_SETUP_GENTLY`:
  40  *      If there is a Git directory, chdir as per RUN_SETUP, otherwise,
  41  *      don't chdir anywhere.
  42  *
  43  * `USE_PAGER`:
  44  *
  45  *      If the standard output is connected to a tty, spawn a pager and
  46  *      feed our output to it.
  47  *
  48  * `NEED_WORK_TREE`:
  49  *
  50  *      Make sure there is a work tree, i.e. the command cannot act
  51  *      on bare repositories.
  52  *      This only makes sense when `RUN_SETUP` is also set.
  53  *
  54  * `SUPPORT_SUPER_PREFIX`:
  55  *
  56  *      The built-in supports `--super-prefix`.
  57  *
  58  * `DELAY_PAGER_CONFIG`:
  59  *
  60  *      If RUN_SETUP or RUN_SETUP_GENTLY is set, git.c normally handles
  61  *      the `pager.<cmd>`-configuration. If this flag is used, git.c
  62  *      will skip that step, instead allowing the built-in to make a
  63  *      more informed decision, e.g., by ignoring `pager.<cmd>` for
  64  *      certain subcommands.
  65  *
  66  * . Add `builtin/foo.o` to `BUILTIN_OBJS` in `Makefile`.
  67  *
  68  * Additionally, if `foo` is a new command, there are 4 more things to do:
  69  *
  70  * . Add tests to `t/` directory.
  71  *
  72  * . Write documentation in `Documentation/git-foo.txt`.
  73  *
  74  * . Add an entry for `git-foo` to `command-list.txt`.
  75  *
  76  * . Add an entry for `/git-foo` to `.gitignore`.
  77  *
  78  *
  79  * How a built-in is called
  80  * ------------------------
  81  *
  82  * The implementation `cmd_foo()` takes three parameters, `argc`, `argv,
  83  * and `prefix`.  The first two are similar to what `main()` of a
  84  * standalone command would be called with.
  85  *
  86  * When `RUN_SETUP` is specified in the `commands[]` table, and when you
  87  * were started from a subdirectory of the work tree, `cmd_foo()` is called
  88  * after chdir(2) to the top of the work tree, and `prefix` gets the path
  89  * to the subdirectory the command started from.  This allows you to
  90  * convert a user-supplied pathname (typically relative to that directory)
  91  * to a pathname relative to the top of the work tree.
  92  *
  93  * The return value from `cmd_foo()` becomes the exit status of the
  94  * command.
  95  */
  96
  97 #define DEFAULT_MERGE_LOG_LEN 20
  98
  99 extern const char git_usage_string[];
 100 extern const char git_more_info_string[];
 101
 102 #define PRUNE_PACKED_DRY_RUN 01
 103 #define PRUNE_PACKED_VERBOSE 02
 104
 105 extern void prune_packed_objects(int);
 106
 107 struct fmt_merge_msg_opts {
 108         unsigned add_title:1,
 109                 credit_people:1;
 110         int shortlog_len;
 111 };
 112
 113 extern int fmt_merge_msg(struct strbuf *in, struct strbuf *out,
 114                          struct fmt_merge_msg_opts *);
 115
 116 /**
 117  * If a built-in has DELAY_PAGER_CONFIG set, the built-in should call this early
 118  * when it wishes to respect the `pager.foo`-config. The `cmd` is the name of
 119  * the built-in, e.g., "foo". If a paging-choice has already been setup, this
 120  * does nothing. The default in `def` should be 0 for "pager off", 1 for "pager
 121  * on" or -1 for "punt".
 122  *
 123  * You should most likely use a default of 0 or 1. "Punt" (-1) could be useful
 124  * to be able to fall back to some historical compatibility name.
 125  */
 126 extern void setup_auto_pager(const char *cmd, int def);
 127
 128 extern int is_builtin(const char *s);
 129
 130 extern int cmd_add(int argc, const char **argv, const char *prefix);
 131 extern int cmd_am(int argc, const char **argv, const char *prefix);
 132 extern int cmd_annotate(int argc, const char **argv, const char *prefix);
 133 extern int cmd_apply(int argc, const char **argv, const char *prefix);
 134 extern int cmd_archive(int argc, const char **argv, const char *prefix);
 135 extern int cmd_bisect__helper(int argc, const char **argv, const char *prefix);
 136 extern int cmd_blame(int argc, const char **argv, const char *prefix);
 137 extern int cmd_branch(int argc, const char **argv, const char *prefix);
 138 extern int cmd_bundle(int argc, const char **argv, const char *prefix);
 139 extern int cmd_cat_file(int argc, const char **argv, const char *prefix);
 140 extern int cmd_checkout(int argc, const char **argv, const char *prefix);
 141 extern int cmd_checkout_index(int argc, const char **argv, const char *prefix);
 142 extern int cmd_check_attr(int argc, const char **argv, const char *prefix);
 143 extern int cmd_check_ignore(int argc, const char **argv, const char *prefix);
 144 extern int cmd_check_mailmap(int argc, const char **argv, const char *prefix);
 145 extern int cmd_check_ref_format(int argc, const char **argv, const char *prefix);
 146 extern int cmd_cherry(int argc, const char **argv, const char *prefix);
 147 extern int cmd_cherry_pick(int argc, const char **argv, const char *prefix);
 148 extern int cmd_clone(int argc, const char **argv, const char *prefix);
 149 extern int cmd_clean(int argc, const char **argv, const char *prefix);
 150 extern int cmd_column(int argc, const char **argv, const char *prefix);
 151 extern int cmd_commit(int argc, const char **argv, const char *prefix);
 152 extern int cmd_commit_graph(int argc, const char **argv, const char *prefix);
 153 extern int cmd_commit_tree(int argc, const char **argv, const char *prefix);
 154 extern int cmd_config(int argc, const char **argv, const char *prefix);
 155 extern int cmd_count_objects(int argc, const char **argv, const char *prefix);
 156 extern int cmd_credential(int argc, const char **argv, const char *prefix);
 157 extern int cmd_describe(int argc, const char **argv, const char *prefix);
 158 extern int cmd_diff_files(int argc, const char **argv, const char *prefix);
 159 extern int cmd_diff_index(int argc, const char **argv, const char *prefix);
 160 extern int cmd_diff(int argc, const char **argv, const char *prefix);
 161 extern int cmd_diff_tree(int argc, const char **argv, const char *prefix);
 162 extern int cmd_difftool(int argc, const char **argv, const char *prefix);
 163 extern int cmd_fast_export(int argc, const char **argv, const char *prefix);
 164 extern int cmd_fetch(int argc, const char **argv, const char *prefix);
 165 extern int cmd_fetch_pack(int argc, const char **argv, const char *prefix);
 166 extern int cmd_fmt_merge_msg(int argc, const char **argv, const char *prefix);
 167 extern int cmd_for_each_ref(int argc, const char **argv, const char *prefix);
 168 extern int cmd_format_patch(int argc, const char **argv, const char *prefix);
 169 extern int cmd_fsck(int argc, const char **argv, const char *prefix);
 170 extern int cmd_gc(int argc, const char **argv, const char *prefix);
 171 extern int cmd_get_tar_commit_id(int argc, const char **argv, const char *prefix);
 172 extern int cmd_grep(int argc, const char **argv, const char *prefix);
 173 extern int cmd_hash_object(int argc, const char **argv, const char *prefix);
 174 extern int cmd_help(int argc, const char **argv, const char *prefix);
 175 extern int cmd_index_pack(int argc, const char **argv, const char *prefix);
 176 extern int cmd_init_db(int argc, const char **argv, const char *prefix);
 177 extern int cmd_interpret_trailers(int argc, const char **argv, const char *prefix);
 178 extern int cmd_log(int argc, const char **argv, const char *prefix);
 179 extern int cmd_log_reflog(int argc, const char **argv, const char *prefix);
 180 extern int cmd_ls_files(int argc, const char **argv, const char *prefix);
 181 extern int cmd_ls_tree(int argc, const char **argv, const char *prefix);
 182 extern int cmd_ls_remote(int argc, const char **argv, const char *prefix);
 183 extern int cmd_mailinfo(int argc, const char **argv, const char *prefix);
 184 extern int cmd_mailsplit(int argc, const char **argv, const char *prefix);
 185 extern int cmd_merge(int argc, const char **argv, const char *prefix);
 186 extern int cmd_merge_base(int argc, const char **argv, const char *prefix);
 187 extern int cmd_merge_index(int argc, const char **argv, const char *prefix);
 188 extern int cmd_merge_ours(int argc, const char **argv, const char *prefix);
 189 extern int cmd_merge_file(int argc, const char **argv, const char *prefix);
 190 extern int cmd_merge_recursive(int argc, const char **argv, const char *prefix);
 191 extern int cmd_merge_tree(int argc, const char **argv, const char *prefix);
 192 extern int cmd_mktag(int argc, const char **argv, const char *prefix);
 193 extern int cmd_mktree(int argc, const char **argv, const char *prefix);
 194 extern int cmd_multi_pack_index(int argc, const char **argv, const char *prefix);
 195 extern int cmd_mv(int argc, const char **argv, const char *prefix);
 196 extern int cmd_name_rev(int argc, const char **argv, const char *prefix);
 197 extern int cmd_notes(int argc, const char **argv, const char *prefix);
 198 extern int cmd_pack_objects(int argc, const char **argv, const char *prefix);
 199 extern int cmd_pack_redundant(int argc, const char **argv, const char *prefix);
 200 extern int cmd_patch_id(int argc, const char **argv, const char *prefix);
 201 extern int cmd_prune(int argc, const char **argv, const char *prefix);
 202 extern int cmd_prune_packed(int argc, const char **argv, const char *prefix);
 203 extern int cmd_pull(int argc, const char **argv, const char *prefix);
 204 extern int cmd_push(int argc, const char **argv, const char *prefix);
 205 extern int cmd_read_tree(int argc, const char **argv, const char *prefix);
 206 extern int cmd_rebase__helper(int argc, const char **argv, const char *prefix);
 207 extern int cmd_receive_pack(int argc, const char **argv, const char *prefix);
 208 extern int cmd_reflog(int argc, const char **argv, const char *prefix);
 209 extern int cmd_remote(int argc, const char **argv, const char *prefix);
 210 extern int cmd_remote_ext(int argc, const char **argv, const char *prefix);
 211 extern int cmd_remote_fd(int argc, const char **argv, const char *prefix);
 212 extern int cmd_repack(int argc, const char **argv, const char *prefix);
 213 extern int cmd_rerere(int argc, const char **argv, const char *prefix);
 214 extern int cmd_reset(int argc, const char **argv, const char *prefix);
 215 extern int cmd_rev_list(int argc, const char **argv, const char *prefix);
 216 extern int cmd_rev_parse(int argc, const char **argv, const char *prefix);
 217 extern int cmd_revert(int argc, const char **argv, const char *prefix);
 218 extern int cmd_rm(int argc, const char **argv, const char *prefix);
 219 extern int cmd_send_pack(int argc, const char **argv, const char *prefix);
 220 extern int cmd_serve(int argc, const char **argv, const char *prefix);
 221 extern int cmd_shortlog(int argc, const char **argv, const char *prefix);
 222 extern int cmd_show(int argc, const char **argv, const char *prefix);
 223 extern int cmd_show_branch(int argc, const char **argv, const char *prefix);
 224 extern int cmd_status(int argc, const char **argv, const char *prefix);
 225 extern int cmd_stripspace(int argc, const char **argv, const char *prefix);
 226 extern int cmd_submodule__helper(int argc, const char **argv, const char *prefix);
 227 extern int cmd_symbolic_ref(int argc, const char **argv, const char *prefix);
 228 extern int cmd_tag(int argc, const char **argv, const char *prefix);
 229 extern int cmd_tar_tree(int argc, const char **argv, const char *prefix);
 230 extern int cmd_unpack_file(int argc, const char **argv, const char *prefix);
 231 extern int cmd_unpack_objects(int argc, const char **argv, const char *prefix);
 232 extern int cmd_update_index(int argc, const char **argv, const char *prefix);
 233 extern int cmd_update_ref(int argc, const char **argv, const char *prefix);
 234 extern int cmd_update_server_info(int argc, const char **argv, const char *prefix);
 235 extern int cmd_upload_archive(int argc, const char **argv, const char *prefix);
 236 extern int cmd_upload_archive_writer(int argc, const char **argv, const char *prefix);
 237 extern int cmd_upload_pack(int argc, const char **argv, const char *prefix);
 238 extern int cmd_var(int argc, const char **argv, const char *prefix);
 239 extern int cmd_verify_commit(int argc, const char **argv, const char *prefix);
 240 extern int cmd_verify_tag(int argc, const char **argv, const char *prefix);
 241 extern int cmd_version(int argc, const char **argv, const char *prefix);
 242 extern int cmd_whatchanged(int argc, const char **argv, const char *prefix);
 243 extern int cmd_worktree(int argc, const char **argv, const char *prefix);
 244 extern int cmd_write_tree(int argc, const char **argv, const char *prefix);
 245 extern int cmd_verify_pack(int argc, const char **argv, const char *prefix);
 246 extern int cmd_show_ref(int argc, const char **argv, const char *prefix);
 247 extern int cmd_pack_refs(int argc, const char **argv, const char *prefix);
 248 extern int cmd_replace(int argc, const char **argv, const char *prefix);
 249
 250 #endif