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  * NEEDSWORK: NOT_USER_GIVEN doesn't apply to commits because we only support
  48  * filtering trees and blobs, but it may be useful to support filtering commits
  49  * in the future.
  50  */
  51 #define NOT_USER_GIVEN  (1u<<25)
  52 #define TRACK_LINEAR    (1u<<26)
  53 #define ALL_REV_FLAGS   (((1u<<11)-1) | NOT_USER_GIVEN | TRACK_LINEAR | PULL_MERGE)
  54
  55 #define DECORATE_SHORT_REFS     1
  56 #define DECORATE_FULL_REFS      2
  57
  58 struct log_info;
  59 struct repository;
  60 struct rev_info;
  61 struct string_list;
  62 struct saved_parents;
  63 struct bloom_key;
  64 struct bloom_filter_settings;
  65 define_shared_commit_slab(revision_sources, char *);
  66
  67 struct rev_cmdline_info {
  68         unsigned int nr;
  69         unsigned int alloc;
  70         struct rev_cmdline_entry {
  71                 struct object *item;
  72                 const char *name;
  73                 enum {
  74                         REV_CMD_REF,
  75                         REV_CMD_PARENTS_ONLY,
  76                         REV_CMD_LEFT,
  77                         REV_CMD_RIGHT,
  78                         REV_CMD_MERGE_BASE,
  79                         REV_CMD_REV
  80                 } whence;
  81                 unsigned flags;
  82         } *rev;
  83 };
  84
  85 #define REVISION_WALK_WALK 0
  86 #define REVISION_WALK_NO_WALK_SORTED 1
  87 #define REVISION_WALK_NO_WALK_UNSORTED 2
  88
  89 struct oidset;
  90 struct topo_walk_info;
  91
  92 struct rev_info {
  93         /* Starting list */
  94         struct commit_list *commits;
  95         struct object_array pending;
  96         struct repository *repo;
  97
  98         /* Parents of shown commits */
  99         struct object_array boundary_commits;
 100
 101         /* The end-points specified by the end user */
 102         struct rev_cmdline_info cmdline;
 103
 104         /* excluding from --branches, --refs, etc. expansion */
 105         struct string_list *ref_excludes;
 106
 107         /* Basic information */
 108         const char *prefix;
 109         const char *def;
 110         struct pathspec prune_data;
 111
 112         /*
 113          * Whether the arguments parsed by setup_revisions() included any
 114          * "input" revisions that might still have yielded an empty pending
 115          * list (e.g., patterns like "--all" or "--glob").
 116          */
 117         int rev_input_given;
 118
 119         /*
 120          * Whether we read from stdin due to the --stdin option.
 121          */
 122         int read_from_stdin;
 123
 124         /* topo-sort */
 125         enum rev_sort_order sort_order;
 126
 127         unsigned int early_output;
 128
 129         unsigned int    ignore_missing:1,
 130                         ignore_missing_links:1;
 131
 132         /* Traversal flags */
 133         unsigned int    dense:1,
 134                         prune:1,
 135                         no_walk:2,
 136                         remove_empty_trees:1,
 137                         simplify_history:1,
 138                         show_pulls:1,
 139                         topo_order:1,
 140                         simplify_merges:1,
 141                         simplify_by_decoration:1,
 142                         single_worktree:1,
 143                         tag_objects:1,
 144                         tree_objects:1,
 145                         blob_objects:1,
 146                         verify_objects:1,
 147                         edge_hint:1,
 148                         edge_hint_aggressive:1,
 149                         limited:1,
 150                         unpacked:1,
 151                         boundary:2,
 152                         count:1,
 153                         left_right:1,
 154                         left_only:1,
 155                         right_only:1,
 156                         rewrite_parents:1,
 157                         print_parents:1,
 158                         show_decorations:1,
 159                         reverse:1,
 160                         reverse_output_stage:1,
 161                         cherry_pick:1,
 162                         cherry_mark:1,
 163                         bisect:1,
 164                         ancestry_path:1,
 165                         first_parent_only:1,
 166                         line_level_traverse:1,
 167                         tree_blobs_in_commit_order:1,
 168
 169                         /*
 170                          * Blobs are shown without regard for their existence.
 171                          * But not so for trees: unless exclude_promisor_objects
 172                          * is set and the tree in question is a promisor object;
 173                          * OR ignore_missing_links is set, the revision walker
 174                          * dies with a "bad tree object HASH" message when
 175                          * encountering a missing tree. For callers that can
 176                          * handle missing trees and want them to be filterable
 177                          * and showable, set this to true. The revision walker
 178                          * will filter and show such a missing tree as usual,
 179                          * but will not attempt to recurse into this tree
 180                          * object.
 181                          */
 182                         do_not_die_on_missing_tree:1,
 183
 184                         /* for internal use only */
 185                         exclude_promisor_objects:1;
 186
 187         /* Diff flags */
 188         unsigned int    diff:1,
 189                         full_diff:1,
 190                         show_root_diff:1,
 191                         match_missing:1,
 192                         no_commit_id:1,
 193                         verbose_header:1,
 194                         always_show_header:1,
 195                         /* Diff-merge flags */
 196                         explicit_diff_merges: 1,
 197                         merges_need_diff: 1,
 198                         separate_merges: 1,
 199                         combine_merges:1,
 200                         combined_all_paths:1,
 201                         combined_imply_patch:1,
 202                         dense_combined_merges:1,
 203                         first_parent_merges:1;
 204
 205         /* Format info */
 206         int             show_notes;
 207         unsigned int    shown_one:1,
 208                         shown_dashes:1,
 209                         show_merge:1,
 210                         show_notes_given:1,
 211                         show_signature:1,
 212                         pretty_given:1,
 213                         abbrev_commit:1,
 214                         abbrev_commit_given:1,
 215                         zero_commit:1,
 216                         use_terminator:1,
 217                         missing_newline:1,
 218                         date_mode_explicit:1,
 219                         preserve_subject:1,
 220                         encode_email_headers:1;
 221         unsigned int    disable_stdin:1;
 222         /* --show-linear-break */
 223         unsigned int    track_linear:1,
 224                         track_first_time:1,
 225                         linear:1;
 226
 227         struct date_mode date_mode;
 228         int             expand_tabs_in_log; /* unset if negative */
 229         int             expand_tabs_in_log_default;
 230
 231         unsigned int    abbrev;
 232         enum cmit_fmt   commit_format;
 233         struct log_info *loginfo;
 234         int             nr, total;
 235         const char      *mime_boundary;
 236         const char      *patch_suffix;
 237         int             numbered_files;
 238         int             reroll_count;
 239         char            *message_id;
 240         struct ident_split from_ident;
 241         struct string_list *ref_message_ids;
 242         int             add_signoff;
 243         const char      *extra_headers;
 244         const char      *log_reencode;
 245         const char      *subject_prefix;
 246         int             patch_name_max;
 247         int             no_inline;
 248         int             show_log_size;
 249         struct string_list *mailmap;
 250
 251         /* Filter by commit log message */
 252         struct grep_opt grep_filter;
 253         /* Negate the match of grep_filter */
 254         int invert_grep;
 255
 256         /* Display history graph */
 257         struct git_graph *graph;
 258
 259         /* special limits */
 260         int skip_count;
 261         int max_count;
 262         timestamp_t max_age;
 263         timestamp_t min_age;
 264         int min_parents;
 265         int max_parents;
 266         int (*include_check)(struct commit *, 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
 322 int ref_excluded(struct string_list *, const char *path);
 323 void clear_ref_exclusion(struct string_list **);
 324 void add_ref_exclusion(struct string_list **, const char *exclude);
 325
 326
 327 #define REV_TREE_SAME           0
 328 #define REV_TREE_NEW            1       /* Only new files */
 329 #define REV_TREE_OLD            2       /* Only files removed */
 330 #define REV_TREE_DIFFERENT      3       /* Mixed changes */
 331
 332 /* revision.c */
 333 typedef void (*show_early_output_fn_t)(struct rev_info *, struct commit_list *);
 334 extern volatile show_early_output_fn_t show_early_output;
 335
 336 struct setup_revision_opt {
 337         const char *def;
 338         void (*tweak)(struct rev_info *, struct setup_revision_opt *);
 339         const char *submodule;  /* TODO: drop this and use rev_info->repo */
 340         unsigned int    assume_dashdash:1,
 341                         allow_exclude_promisor_objects:1;
 342         unsigned revarg_opt;
 343 };
 344
 345 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
 346 #define init_revisions(revs, prefix) repo_init_revisions(the_repository, revs, prefix)
 347 #endif
 348
 349 /**
 350  * Initialize a rev_info structure with default values. The third parameter may
 351  * be NULL or can be prefix path, and then the `.prefix` variable will be set
 352  * to it. This is typically the first function you want to call when you want
 353  * to deal with a revision list. After calling this function, you are free to
 354  * customize options, like set `.ignore_merges` to 0 if you don't want to
 355  * ignore merges, and so on.
 356  */
 357 void repo_init_revisions(struct repository *r,
 358                          struct rev_info *revs,
 359                          const char *prefix);
 360
 361 /**
 362  * Parse revision information, filling in the `rev_info` structure, and
 363  * removing the used arguments from the argument list. Returns the number
 364  * of arguments left that weren't recognized, which are also moved to the
 365  * head of the argument list. The last parameter is used in case no
 366  * parameter given by the first two arguments.
 367  */
 368 int setup_revisions(int argc, const char **argv, struct rev_info *revs,
 369                     struct setup_revision_opt *);
 370
 371 void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
 372                         const struct option *options,
 373                         const char * const usagestr[]);
 374 #define REVARG_CANNOT_BE_FILENAME 01
 375 #define REVARG_COMMITTISH 02
 376 int handle_revision_arg(const char *arg, struct rev_info *revs,
 377                         int flags, unsigned revarg_opt);
 378
 379 /**
 380  * Reset the flags used by the revision walking api. You can use this to do
 381  * multiple sequential revision walks.
 382  */
 383 void reset_revision_walk(void);
 384
 385 /**
 386  * Prepares the rev_info structure for a walk. You should check if it returns
 387  * any error (non-zero return code) and if it does not, you can start using
 388  * get_revision() to do the iteration.
 389  */
 390 int prepare_revision_walk(struct rev_info *revs);
 391
 392 /**
 393  * Takes a pointer to a `rev_info` structure and iterates over it, returning a
 394  * `struct commit *` each time you call it. The end of the revision list is
 395  * indicated by returning a NULL pointer.
 396  */
 397 struct commit *get_revision(struct rev_info *revs);
 398
 399 const char *get_revision_mark(const struct rev_info *revs,
 400                               const struct commit *commit);
 401 void put_revision_mark(const struct rev_info *revs,
 402                        const struct commit *commit);
 403
 404 void mark_parents_uninteresting(struct commit *commit);
 405 void mark_tree_uninteresting(struct repository *r, struct tree *tree);
 406 void mark_trees_uninteresting_sparse(struct repository *r, struct oidset *trees);
 407
 408 void show_object_with_name(FILE *, struct object *, const char *);
 409
 410 /**
 411  * This function can be used if you want to add commit objects as revision
 412  * information. You can use the `UNINTERESTING` object flag to indicate if
 413  * you want to include or exclude the given commit (and commits reachable
 414  * from the given commit) from the revision list.
 415  *
 416  * NOTE: If you have the commits as a string list then you probably want to
 417  * use setup_revisions(), instead of parsing each string and using this
 418  * function.
 419  */
 420 void add_pending_object(struct rev_info *revs,
 421                         struct object *obj, const char *name);
 422
 423 void add_pending_oid(struct rev_info *revs,
 424                      const char *name, const struct object_id *oid,
 425                      unsigned int flags);
 426
 427 void add_head_to_pending(struct rev_info *);
 428 void add_reflogs_to_pending(struct rev_info *, unsigned int flags);
 429 void add_index_objects_to_pending(struct rev_info *, unsigned int flags);
 430
 431 enum commit_action {
 432         commit_ignore,
 433         commit_show,
 434         commit_error
 435 };
 436
 437 enum commit_action get_commit_action(struct rev_info *revs,
 438                                      struct commit *commit);
 439 enum commit_action simplify_commit(struct rev_info *revs,
 440                                    struct commit *commit);
 441
 442 enum rewrite_result {
 443         rewrite_one_ok,
 444         rewrite_one_noparents,
 445         rewrite_one_error
 446 };
 447
 448 typedef enum rewrite_result (*rewrite_parent_fn_t)(struct rev_info *revs, struct commit **pp);
 449
 450 int rewrite_parents(struct rev_info *revs,
 451                     struct commit *commit,
 452                     rewrite_parent_fn_t rewrite_parent);
 453
 454 /*
 455  * The log machinery saves the original parent list so that
 456  * get_saved_parents() can later tell what the real parents of the
 457  * commits are, when commit->parents has been modified by history
 458  * simpification.
 459  *
 460  * get_saved_parents() will transparently return commit->parents if
 461  * history simplification is off.
 462  */
 463 struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit);
 464
 465 #endif