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                         no_kept_objects:1,
 152                         boundary:2,
 153                         count:1,
 154                         left_right:1,
 155                         left_only:1,
 156                         right_only:1,
 157                         rewrite_parents:1,
 158                         print_parents:1,
 159                         show_decorations:1,
 160                         reverse:1,
 161                         reverse_output_stage:1,
 162                         cherry_pick:1,
 163                         cherry_mark:1,
 164                         bisect:1,
 165                         ancestry_path:1,
 166                         first_parent_only:1,
 167                         line_level_traverse:1,
 168                         tree_blobs_in_commit_order:1,
 169
 170                         /*
 171                          * Blobs are shown without regard for their existence.
 172                          * But not so for trees: unless exclude_promisor_objects
 173                          * is set and the tree in question is a promisor object;
 174                          * OR ignore_missing_links is set, the revision walker
 175                          * dies with a "bad tree object HASH" message when
 176                          * encountering a missing tree. For callers that can
 177                          * handle missing trees and want them to be filterable
 178                          * and showable, set this to true. The revision walker
 179                          * will filter and show such a missing tree as usual,
 180                          * but will not attempt to recurse into this tree
 181                          * object.
 182                          */
 183                         do_not_die_on_missing_tree:1,
 184
 185                         /* for internal use only */
 186                         exclude_promisor_objects:1;
 187
 188         /* Diff flags */
 189         unsigned int    diff:1,
 190                         full_diff:1,
 191                         show_root_diff:1,
 192                         match_missing:1,
 193                         no_commit_id:1,
 194                         verbose_header:1,
 195                         always_show_header:1,
 196                         /* Diff-merge flags */
 197                         explicit_diff_merges: 1,
 198                         merges_need_diff: 1,
 199                         separate_merges: 1,
 200                         combine_merges:1,
 201                         combined_all_paths:1,
 202                         combined_imply_patch:1,
 203                         dense_combined_merges:1,
 204                         first_parent_merges:1;
 205
 206         /* Format info */
 207         int             show_notes;
 208         unsigned int    shown_one:1,
 209                         shown_dashes:1,
 210                         show_merge:1,
 211                         show_notes_given:1,
 212                         show_signature:1,
 213                         pretty_given:1,
 214                         abbrev_commit:1,
 215                         abbrev_commit_given:1,
 216                         zero_commit:1,
 217                         use_terminator:1,
 218                         missing_newline:1,
 219                         date_mode_explicit:1,
 220                         preserve_subject:1,
 221                         encode_email_headers:1;
 222         unsigned int    disable_stdin:1;
 223         /* --show-linear-break */
 224         unsigned int    track_linear:1,
 225                         track_first_time:1,
 226                         linear:1;
 227
 228         struct date_mode date_mode;
 229         int             expand_tabs_in_log; /* unset if negative */
 230         int             expand_tabs_in_log_default;
 231
 232         unsigned int    abbrev;
 233         enum cmit_fmt   commit_format;
 234         struct log_info *loginfo;
 235         int             nr, total;
 236         const char      *mime_boundary;
 237         const char      *patch_suffix;
 238         int             numbered_files;
 239         const char      *reroll_count;
 240         char            *message_id;
 241         struct ident_split from_ident;
 242         struct string_list *ref_message_ids;
 243         int             add_signoff;
 244         const char      *extra_headers;
 245         const char      *log_reencode;
 246         const char      *subject_prefix;
 247         int             patch_name_max;
 248         int             no_inline;
 249         int             show_log_size;
 250         struct string_list *mailmap;
 251
 252         /* Filter by commit log message */
 253         struct grep_opt grep_filter;
 254         /* Negate the match of grep_filter */
 255         int invert_grep;
 256
 257         /* Display history graph */
 258         struct git_graph *graph;
 259
 260         /* special limits */
 261         int skip_count;
 262         int max_count;
 263         timestamp_t max_age;
 264         timestamp_t min_age;
 265         int min_parents;
 266         int max_parents;
 267         int (*include_check)(struct commit *, void *);
 268         void *include_check_data;
 269
 270         /* diff info for patches and for paths limiting */
 271         struct diff_options diffopt;
 272         struct diff_options pruning;
 273
 274         struct reflog_walk_info *reflog_info;
 275         struct decoration children;
 276         struct decoration merge_simplification;
 277         struct decoration treesame;
 278
 279         /* notes-specific options: which refs to show */
 280         struct display_notes_opt notes_opt;
 281
 282         /* interdiff */
 283         const struct object_id *idiff_oid1;
 284         const struct object_id *idiff_oid2;
 285         const char *idiff_title;
 286
 287         /* range-diff */
 288         const char *rdiff1;
 289         const char *rdiff2;
 290         int creation_factor;
 291         const char *rdiff_title;
 292
 293         /* commit counts */
 294         int count_left;
 295         int count_right;
 296         int count_same;
 297
 298         /* line level range that we are chasing */
 299         struct decoration line_log_data;
 300
 301         /* copies of the parent lists, for --full-diff display */
 302         struct saved_parents *saved_parents_slab;
 303
 304         struct commit_list *previous_parents;
 305         const char *break_bar;
 306
 307         struct revision_sources *sources;
 308
 309         struct topo_walk_info *topo_walk_info;
 310
 311         /* Commit graph bloom filter fields */
 312         /* The bloom filter key(s) for the pathspec */
 313         struct bloom_key *bloom_keys;
 314         int bloom_keys_nr;
 315
 316         /*
 317          * The bloom filter settings used to generate the key.
 318          * This is loaded from the commit-graph being used.
 319          */
 320         struct bloom_filter_settings *bloom_filter_settings;
 321
 322         /* misc. flags related to '--no-kept-objects' */
 323         unsigned keep_pack_cache_flags;
 324 };
 325
 326 int ref_excluded(struct string_list *, const char *path);
 327 void clear_ref_exclusion(struct string_list **);
 328 void add_ref_exclusion(struct string_list **, const char *exclude);
 329
 330
 331 #define REV_TREE_SAME           0
 332 #define REV_TREE_NEW            1       /* Only new files */
 333 #define REV_TREE_OLD            2       /* Only files removed */
 334 #define REV_TREE_DIFFERENT      3       /* Mixed changes */
 335
 336 /* revision.c */
 337 typedef void (*show_early_output_fn_t)(struct rev_info *, struct commit_list *);
 338 extern volatile show_early_output_fn_t show_early_output;
 339
 340 struct setup_revision_opt {
 341         const char *def;
 342         void (*tweak)(struct rev_info *, struct setup_revision_opt *);
 343         const char *submodule;  /* TODO: drop this and use rev_info->repo */
 344         unsigned int    assume_dashdash:1,
 345                         allow_exclude_promisor_objects:1;
 346         unsigned revarg_opt;
 347 };
 348
 349 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
 350 #define init_revisions(revs, prefix) repo_init_revisions(the_repository, revs, prefix)
 351 #endif
 352
 353 /**
 354  * Initialize a rev_info structure with default values. The third parameter may
 355  * be NULL or can be prefix path, and then the `.prefix` variable will be set
 356  * to it. This is typically the first function you want to call when you want
 357  * to deal with a revision list. After calling this function, you are free to
 358  * customize options, like set `.ignore_merges` to 0 if you don't want to
 359  * ignore merges, and so on.
 360  */
 361 void repo_init_revisions(struct repository *r,
 362                          struct rev_info *revs,
 363                          const char *prefix);
 364
 365 /**
 366  * Parse revision information, filling in the `rev_info` structure, and
 367  * removing the used arguments from the argument list. Returns the number
 368  * of arguments left that weren't recognized, which are also moved to the
 369  * head of the argument list. The last parameter is used in case no
 370  * parameter given by the first two arguments.
 371  */
 372 int setup_revisions(int argc, const char **argv, struct rev_info *revs,
 373                     struct setup_revision_opt *);
 374
 375 void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
 376                         const struct option *options,
 377                         const char * const usagestr[]);
 378 #define REVARG_CANNOT_BE_FILENAME 01
 379 #define REVARG_COMMITTISH 02
 380 int handle_revision_arg(const char *arg, struct rev_info *revs,
 381                         int flags, unsigned revarg_opt);
 382
 383 /**
 384  * Reset the flags used by the revision walking api. You can use this to do
 385  * multiple sequential revision walks.
 386  */
 387 void reset_revision_walk(void);
 388
 389 /**
 390  * Prepares the rev_info structure for a walk. You should check if it returns
 391  * any error (non-zero return code) and if it does not, you can start using
 392  * get_revision() to do the iteration.
 393  */
 394 int prepare_revision_walk(struct rev_info *revs);
 395
 396 /**
 397  * Takes a pointer to a `rev_info` structure and iterates over it, returning a
 398  * `struct commit *` each time you call it. The end of the revision list is
 399  * indicated by returning a NULL pointer.
 400  */
 401 struct commit *get_revision(struct rev_info *revs);
 402
 403 const char *get_revision_mark(const struct rev_info *revs,
 404                               const struct commit *commit);
 405 void put_revision_mark(const struct rev_info *revs,
 406                        const struct commit *commit);
 407
 408 void mark_parents_uninteresting(struct commit *commit);
 409 void mark_tree_uninteresting(struct repository *r, struct tree *tree);
 410 void mark_trees_uninteresting_sparse(struct repository *r, struct oidset *trees);
 411
 412 void show_object_with_name(FILE *, struct object *, const char *);
 413
 414 /**
 415  * This function can be used if you want to add commit objects as revision
 416  * information. You can use the `UNINTERESTING` object flag to indicate if
 417  * you want to include or exclude the given commit (and commits reachable
 418  * from the given commit) from the revision list.
 419  *
 420  * NOTE: If you have the commits as a string list then you probably want to
 421  * use setup_revisions(), instead of parsing each string and using this
 422  * function.
 423  */
 424 void add_pending_object(struct rev_info *revs,
 425                         struct object *obj, const char *name);
 426
 427 void add_pending_oid(struct rev_info *revs,
 428                      const char *name, const struct object_id *oid,
 429                      unsigned int flags);
 430
 431 void add_head_to_pending(struct rev_info *);
 432 void add_reflogs_to_pending(struct rev_info *, unsigned int flags);
 433 void add_index_objects_to_pending(struct rev_info *, unsigned int flags);
 434
 435 enum commit_action {
 436         commit_ignore,
 437         commit_show,
 438         commit_error
 439 };
 440
 441 enum commit_action get_commit_action(struct rev_info *revs,
 442                                      struct commit *commit);
 443 enum commit_action simplify_commit(struct rev_info *revs,
 444                                    struct commit *commit);
 445
 446 enum rewrite_result {
 447         rewrite_one_ok,
 448         rewrite_one_noparents,
 449         rewrite_one_error
 450 };
 451
 452 typedef enum rewrite_result (*rewrite_parent_fn_t)(struct rev_info *revs, struct commit **pp);
 453
 454 int rewrite_parents(struct rev_info *revs,
 455                     struct commit *commit,
 456                     rewrite_parent_fn_t rewrite_parent);
 457
 458 /*
 459  * The log machinery saves the original parent list so that
 460  * get_saved_parents() can later tell what the real parents of the
 461  * commits are, when commit->parents has been modified by history
 462  * simpification.
 463  *
 464  * get_saved_parents() will transparently return commit->parents if
 465  * history simplification is off.
 466  */
 467 struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit);
 468
 469 #endif