revision.h

   1 #ifndef REVISION_H
   2 #define REVISION_H
   3
   4 #include "commit.h"
   5 #include "parse-options.h"
   6 #include "grep.h"
   7 #include "notes.h"
   8 #include "pretty.h"
   9 #include "diff.h"
  10 #include "commit-slab-decl.h"
  11
  12 /**
  13  * The revision walking API offers functions to build a list of revisions
  14  * and then iterate over that list.
  15  *
  16  * Calling sequence
  17  * ----------------
  18  *
  19  * The walking API has a given calling sequence: first you need to initialize
  20  * a rev_info structure, then add revisions to control what kind of revision
  21  * list do you want to get, finally you can iterate over the revision list.
  22  *
  23  */
  24
  25 /* Remember to update object flag allocation in object.h */
  26 #define SEEN            (1u<<0)
  27 #define UNINTERESTING   (1u<<1)
  28 #define TREESAME        (1u<<2)
  29 #define SHOWN           (1u<<3)
  30 #define TMP_MARK        (1u<<4) /* for isolated cases; clean after use */
  31 #define BOUNDARY        (1u<<5)
  32 #define CHILD_SHOWN     (1u<<6)
  33 #define ADDED           (1u<<7) /* Parents already parsed and added? */
  34 #define SYMMETRIC_LEFT  (1u<<8)
  35 #define PATCHSAME       (1u<<9)
  36 #define BOTTOM          (1u<<10)
  37
  38 /* WARNING: This is also used as REACHABLE in commit-graph.c. */
  39 #define PULL_MERGE      (1u<<15)
  40
  41 #define TOPO_WALK_EXPLORED      (1u<<23)
  42 #define TOPO_WALK_INDEGREE      (1u<<24)
  43
  44 /*
  45  * Indicates object was reached by traversal. i.e. not given by user on
  46  * command-line or stdin.
  47  */
  48 #define NOT_USER_GIVEN  (1u<<25)
  49 #define TRACK_LINEAR    (1u<<26)
  50 #define ALL_REV_FLAGS   (((1u<<11)-1) | NOT_USER_GIVEN | TRACK_LINEAR | PULL_MERGE)
  51
  52 #define DECORATE_SHORT_REFS     1
  53 #define DECORATE_FULL_REFS      2
  54
  55 struct log_info;
  56 struct repository;
  57 struct rev_info;
  58 struct string_list;
  59 struct saved_parents;
  60 struct bloom_key;
  61 struct bloom_filter_settings;
  62 define_shared_commit_slab(revision_sources, char *);
  63
  64 struct rev_cmdline_info {
  65         unsigned int nr;
  66         unsigned int alloc;
  67         struct rev_cmdline_entry {
  68                 struct object *item;
  69                 const char *name;
  70                 enum {
  71                         REV_CMD_REF,
  72                         REV_CMD_PARENTS_ONLY,
  73                         REV_CMD_LEFT,
  74                         REV_CMD_RIGHT,
  75                         REV_CMD_MERGE_BASE,
  76                         REV_CMD_REV
  77                 } whence;
  78                 unsigned flags;
  79         } *rev;
  80 };
  81
  82 #define REVISION_WALK_WALK 0
  83 #define REVISION_WALK_NO_WALK_SORTED 1
  84 #define REVISION_WALK_NO_WALK_UNSORTED 2
  85
  86 struct oidset;
  87 struct topo_walk_info;
  88
  89 struct rev_info {
  90         /* Starting list */
  91         struct commit_list *commits;
  92         struct object_array pending;
  93         struct repository *repo;
  94
  95         /* Parents of shown commits */
  96         struct object_array boundary_commits;
  97
  98         /* The end-points specified by the end user */
  99         struct rev_cmdline_info cmdline;
 100
 101         /* excluding from --branches, --refs, etc. expansion */
 102         struct string_list *ref_excludes;
 103
 104         /* Basic information */
 105         const char *prefix;
 106         const char *def;
 107         struct pathspec prune_data;
 108
 109         /*
 110          * Whether the arguments parsed by setup_revisions() included any
 111          * "input" revisions that might still have yielded an empty pending
 112          * list (e.g., patterns like "--all" or "--glob").
 113          */
 114         int rev_input_given;
 115
 116         /*
 117          * Whether we read from stdin due to the --stdin option.
 118          */
 119         int read_from_stdin;
 120
 121         /* topo-sort */
 122         enum rev_sort_order sort_order;
 123
 124         unsigned int early_output;
 125
 126         unsigned int    ignore_missing:1,
 127                         ignore_missing_links:1;
 128
 129         /* Traversal flags */
 130         unsigned int    dense:1,
 131                         prune:1,
 132                         no_walk:2,
 133                         remove_empty_trees:1,
 134                         simplify_history:1,
 135                         show_pulls:1,
 136                         topo_order:1,
 137                         simplify_merges:1,
 138                         simplify_by_decoration:1,
 139                         single_worktree:1,
 140                         tag_objects:1,
 141                         tree_objects:1,
 142                         blob_objects:1,
 143                         verify_objects:1,
 144                         edge_hint:1,
 145                         edge_hint_aggressive:1,
 146                         limited:1,
 147                         unpacked:1,
 148                         no_kept_objects:1,
 149                         boundary:2,
 150                         count:1,
 151                         left_right:1,
 152                         left_only:1,
 153                         right_only:1,
 154                         rewrite_parents:1,
 155                         print_parents:1,
 156                         show_decorations:1,
 157                         reverse:1,
 158                         reverse_output_stage:1,
 159                         cherry_pick:1,
 160                         cherry_mark:1,
 161                         bisect:1,
 162                         ancestry_path:1,
 163                         first_parent_only:1,
 164                         line_level_traverse:1,
 165                         tree_blobs_in_commit_order:1,
 166
 167                         /*
 168                          * Blobs are shown without regard for their existence.
 169                          * But not so for trees: unless exclude_promisor_objects
 170                          * is set and the tree in question is a promisor object;
 171                          * OR ignore_missing_links is set, the revision walker
 172                          * dies with a "bad tree object HASH" message when
 173                          * encountering a missing tree. For callers that can
 174                          * handle missing trees and want them to be filterable
 175                          * and showable, set this to true. The revision walker
 176                          * will filter and show such a missing tree as usual,
 177                          * but will not attempt to recurse into this tree
 178                          * object.
 179                          */
 180                         do_not_die_on_missing_tree:1,
 181
 182                         /* for internal use only */
 183                         exclude_promisor_objects:1;
 184
 185         /* Diff flags */
 186         unsigned int    diff:1,
 187                         full_diff:1,
 188                         show_root_diff:1,
 189                         match_missing:1,
 190                         no_commit_id:1,
 191                         verbose_header:1,
 192                         always_show_header:1,
 193                         /* Diff-merge flags */
 194                         explicit_diff_merges: 1,
 195                         merges_need_diff: 1,
 196                         merges_imply_patch:1,
 197                         separate_merges: 1,
 198                         combine_merges:1,
 199                         combined_all_paths:1,
 200                         dense_combined_merges:1,
 201                         first_parent_merges:1;
 202
 203         /* Format info */
 204         int             show_notes;
 205         unsigned int    shown_one:1,
 206                         shown_dashes:1,
 207                         show_merge:1,
 208                         show_notes_given:1,
 209                         show_signature:1,
 210                         pretty_given:1,
 211                         abbrev_commit:1,
 212                         abbrev_commit_given:1,
 213                         zero_commit:1,
 214                         use_terminator:1,
 215                         missing_newline:1,
 216                         date_mode_explicit:1,
 217                         preserve_subject:1,
 218                         encode_email_headers:1,
 219                         include_header:1;
 220         unsigned int    disable_stdin:1;
 221         /* --show-linear-break */
 222         unsigned int    track_linear:1,
 223                         track_first_time:1,
 224                         linear:1;
 225
 226         struct date_mode date_mode;
 227         int             expand_tabs_in_log; /* unset if negative */
 228         int             expand_tabs_in_log_default;
 229
 230         unsigned int    abbrev;
 231         enum cmit_fmt   commit_format;
 232         struct log_info *loginfo;
 233         int             nr, total;
 234         const char      *mime_boundary;
 235         const char      *patch_suffix;
 236         int             numbered_files;
 237         const char      *reroll_count;
 238         char            *message_id;
 239         struct ident_split from_ident;
 240         struct string_list *ref_message_ids;
 241         int             add_signoff;
 242         const char      *extra_headers;
 243         const char      *log_reencode;
 244         const char      *subject_prefix;
 245         int             patch_name_max;
 246         int             no_inline;
 247         int             show_log_size;
 248         struct string_list *mailmap;
 249
 250         /* Filter by commit log message */
 251         struct grep_opt grep_filter;
 252         /* Negate the match of grep_filter */
 253         int invert_grep;
 254
 255         /* Display history graph */
 256         struct git_graph *graph;
 257
 258         /* special limits */
 259         int skip_count;
 260         int max_count;
 261         timestamp_t max_age;
 262         timestamp_t min_age;
 263         int min_parents;
 264         int max_parents;
 265         int (*include_check)(struct commit *, void *);
 266         int (*include_check_obj)(struct object *obj, void *);
 267         void *include_check_data;
 268
 269         /* diff info for patches and for paths limiting */
 270         struct diff_options diffopt;
 271         struct diff_options pruning;
 272
 273         struct reflog_walk_info *reflog_info;
 274         struct decoration children;
 275         struct decoration merge_simplification;
 276         struct decoration treesame;
 277
 278         /* notes-specific options: which refs to show */
 279         struct display_notes_opt notes_opt;
 280
 281         /* interdiff */
 282         const struct object_id *idiff_oid1;
 283         const struct object_id *idiff_oid2;
 284         const char *idiff_title;
 285
 286         /* range-diff */
 287         const char *rdiff1;
 288         const char *rdiff2;
 289         int creation_factor;
 290         const char *rdiff_title;
 291
 292         /* commit counts */
 293         int count_left;
 294         int count_right;
 295         int count_same;
 296
 297         /* line level range that we are chasing */
 298         struct decoration line_log_data;
 299
 300         /* copies of the parent lists, for --full-diff display */
 301         struct saved_parents *saved_parents_slab;
 302
 303         struct commit_list *previous_parents;
 304         const char *break_bar;
 305
 306         struct revision_sources *sources;
 307
 308         struct topo_walk_info *topo_walk_info;
 309
 310         /* Commit graph bloom filter fields */
 311         /* The bloom filter key(s) for the pathspec */
 312         struct bloom_key *bloom_keys;
 313         int bloom_keys_nr;
 314
 315         /*
 316          * The bloom filter settings used to generate the key.
 317          * This is loaded from the commit-graph being used.
 318          */
 319         struct bloom_filter_settings *bloom_filter_settings;
 320
 321         /* misc. flags related to '--no-kept-objects' */
 322         unsigned keep_pack_cache_flags;
 323 };
 324
 325 int ref_excluded(struct string_list *, const char *path);
 326 void clear_ref_exclusion(struct string_list **);
 327 void add_ref_exclusion(struct string_list **, const char *exclude);
 328
 329
 330 #define REV_TREE_SAME           0
 331 #define REV_TREE_NEW            1       /* Only new files */
 332 #define REV_TREE_OLD            2       /* Only files removed */
 333 #define REV_TREE_DIFFERENT      3       /* Mixed changes */
 334
 335 /* revision.c */
 336 typedef void (*show_early_output_fn_t)(struct rev_info *, struct commit_list *);
 337 extern volatile show_early_output_fn_t show_early_output;
 338
 339 struct setup_revision_opt {
 340         const char *def;
 341         void (*tweak)(struct rev_info *, struct setup_revision_opt *);
 342         const char *submodule;  /* TODO: drop this and use rev_info->repo */
 343         unsigned int    assume_dashdash:1,
 344                         allow_exclude_promisor_objects:1;
 345         unsigned revarg_opt;
 346 };
 347
 348 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
 349 #define init_revisions(revs, prefix) repo_init_revisions(the_repository, revs, prefix)
 350 #endif
 351
 352 /**
 353  * Initialize a rev_info structure with default values. The third parameter may
 354  * be NULL or can be prefix path, and then the `.prefix` variable will be set
 355  * to it. This is typically the first function you want to call when you want
 356  * to deal with a revision list. After calling this function, you are free to
 357  * customize options, like set `.ignore_merges` to 0 if you don't want to
 358  * ignore merges, and so on.
 359  */
 360 void repo_init_revisions(struct repository *r,
 361                          struct rev_info *revs,
 362                          const char *prefix);
 363
 364 /**
 365  * Parse revision information, filling in the `rev_info` structure, and
 366  * removing the used arguments from the argument list. Returns the number
 367  * of arguments left that weren't recognized, which are also moved to the
 368  * head of the argument list. The last parameter is used in case no
 369  * parameter given by the first two arguments.
 370  */
 371 int setup_revisions(int argc, const char **argv, struct rev_info *revs,
 372                     struct setup_revision_opt *);
 373
 374 void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
 375                         const struct option *options,
 376                         const char * const usagestr[]);
 377 #define REVARG_CANNOT_BE_FILENAME 01
 378 #define REVARG_COMMITTISH 02
 379 int handle_revision_arg(const char *arg, struct rev_info *revs,
 380                         int flags, unsigned revarg_opt);
 381
 382 /**
 383  * Reset the flags used by the revision walking api. You can use this to do
 384  * multiple sequential revision walks.
 385  */
 386 void reset_revision_walk(void);
 387
 388 /**
 389  * Prepares the rev_info structure for a walk. You should check if it returns
 390  * any error (non-zero return code) and if it does not, you can start using
 391  * get_revision() to do the iteration.
 392  */
 393 int prepare_revision_walk(struct rev_info *revs);
 394
 395 /**
 396  * Takes a pointer to a `rev_info` structure and iterates over it, returning a
 397  * `struct commit *` each time you call it. The end of the revision list is
 398  * indicated by returning a NULL pointer.
 399  */
 400 struct commit *get_revision(struct rev_info *revs);
 401
 402 const char *get_revision_mark(const struct rev_info *revs,
 403                               const struct commit *commit);
 404 void put_revision_mark(const struct rev_info *revs,
 405                        const struct commit *commit);
 406
 407 void mark_parents_uninteresting(struct commit *commit);
 408 void mark_tree_uninteresting(struct repository *r, struct tree *tree);
 409 void mark_trees_uninteresting_sparse(struct repository *r, struct oidset *trees);
 410
 411 void show_object_with_name(FILE *, struct object *, const char *);
 412
 413 /**
 414  * This function can be used if you want to add commit objects as revision
 415  * information. You can use the `UNINTERESTING` object flag to indicate if
 416  * you want to include or exclude the given commit (and commits reachable
 417  * from the given commit) from the revision list.
 418  *
 419  * NOTE: If you have the commits as a string list then you probably want to
 420  * use setup_revisions(), instead of parsing each string and using this
 421  * function.
 422  */
 423 void add_pending_object(struct rev_info *revs,
 424                         struct object *obj, const char *name);
 425
 426 void add_pending_oid(struct rev_info *revs,
 427                      const char *name, const struct object_id *oid,
 428                      unsigned int flags);
 429
 430 void add_head_to_pending(struct rev_info *);
 431 void add_reflogs_to_pending(struct rev_info *, unsigned int flags);
 432 void add_index_objects_to_pending(struct rev_info *, unsigned int flags);
 433
 434 enum commit_action {
 435         commit_ignore,
 436         commit_show,
 437         commit_error
 438 };
 439
 440 enum commit_action get_commit_action(struct rev_info *revs,
 441                                      struct commit *commit);
 442 enum commit_action simplify_commit(struct rev_info *revs,
 443                                    struct commit *commit);
 444
 445 enum rewrite_result {
 446         rewrite_one_ok,
 447         rewrite_one_noparents,
 448         rewrite_one_error
 449 };
 450
 451 typedef enum rewrite_result (*rewrite_parent_fn_t)(struct rev_info *revs, struct commit **pp);
 452
 453 int rewrite_parents(struct rev_info *revs,
 454                     struct commit *commit,
 455                     rewrite_parent_fn_t rewrite_parent);
 456
 457 /*
 458  * The log machinery saves the original parent list so that
 459  * get_saved_parents() can later tell what the real parents of the
 460  * commits are, when commit->parents has been modified by history
 461  * simpification.
 462  *
 463  * get_saved_parents() will transparently return commit->parents if
 464  * history simplification is off.
 465  */
 466 struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit);
 467
 468 #endif