diff.h

   1 /*
   2  * Copyright (C) 2005 Junio C Hamano
   3  */
   4 #ifndef DIFF_H
   5 #define DIFF_H
   6
   7 #include "tree-walk.h"
   8 #include "pathspec.h"
   9 #include "object.h"
  10 #include "oidset.h"
  11
  12 struct rev_info;
  13 struct diff_options;
  14 struct diff_queue_struct;
  15 struct strbuf;
  16 struct diff_filespec;
  17 struct userdiff_driver;
  18 struct oid_array;
  19 struct commit;
  20 struct combine_diff_path;
  21 struct repository;
  22
  23 typedef int (*pathchange_fn_t)(struct diff_options *options,
  24                  struct combine_diff_path *path);
  25
  26 typedef void (*change_fn_t)(struct diff_options *options,
  27                  unsigned old_mode, unsigned new_mode,
  28                  const struct object_id *old_oid,
  29                  const struct object_id *new_oid,
  30                  int old_oid_valid, int new_oid_valid,
  31                  const char *fullpath,
  32                  unsigned old_dirty_submodule, unsigned new_dirty_submodule);
  33
  34 typedef void (*add_remove_fn_t)(struct diff_options *options,
  35                     int addremove, unsigned mode,
  36                     const struct object_id *oid,
  37                     int oid_valid,
  38                     const char *fullpath, unsigned dirty_submodule);
  39
  40 typedef void (*diff_format_fn_t)(struct diff_queue_struct *q,
  41                 struct diff_options *options, void *data);
  42
  43 typedef struct strbuf *(*diff_prefix_fn_t)(struct diff_options *opt, void *data);
  44
  45 #define DIFF_FORMAT_RAW         0x0001
  46 #define DIFF_FORMAT_DIFFSTAT    0x0002
  47 #define DIFF_FORMAT_NUMSTAT     0x0004
  48 #define DIFF_FORMAT_SUMMARY     0x0008
  49 #define DIFF_FORMAT_PATCH       0x0010
  50 #define DIFF_FORMAT_SHORTSTAT   0x0020
  51 #define DIFF_FORMAT_DIRSTAT     0x0040
  52
  53 /* These override all above */
  54 #define DIFF_FORMAT_NAME        0x0100
  55 #define DIFF_FORMAT_NAME_STATUS 0x0200
  56 #define DIFF_FORMAT_CHECKDIFF   0x0400
  57
  58 /* Same as output_format = 0 but we know that -s flag was given
  59  * and we should not give default value to output_format.
  60  */
  61 #define DIFF_FORMAT_NO_OUTPUT   0x0800
  62
  63 #define DIFF_FORMAT_CALLBACK    0x1000
  64
  65 #define DIFF_FLAGS_INIT { 0 }
  66 struct diff_flags {
  67         unsigned recursive:1;
  68         unsigned tree_in_recursive:1;
  69         unsigned binary:1;
  70         unsigned text:1;
  71         unsigned full_index:1;
  72         unsigned silent_on_remove:1;
  73         unsigned find_copies_harder:1;
  74         unsigned follow_renames:1;
  75         unsigned rename_empty:1;
  76         unsigned has_changes:1;
  77         unsigned quick:1;
  78         unsigned no_index:1;
  79         unsigned allow_external:1;
  80         unsigned exit_with_status:1;
  81         unsigned reverse_diff:1;
  82         unsigned check_failed:1;
  83         unsigned relative_name:1;
  84         unsigned ignore_submodules:1;
  85         unsigned dirstat_cumulative:1;
  86         unsigned dirstat_by_file:1;
  87         unsigned allow_textconv:1;
  88         unsigned textconv_set_via_cmdline:1;
  89         unsigned diff_from_contents:1;
  90         unsigned dirty_submodules:1;
  91         unsigned ignore_untracked_in_submodules:1;
  92         unsigned ignore_dirty_submodules:1;
  93         unsigned override_submodule_config:1;
  94         unsigned dirstat_by_line:1;
  95         unsigned funccontext:1;
  96         unsigned default_follow_renames:1;
  97         unsigned stat_with_summary:1;
  98         unsigned suppress_diff_headers:1;
  99         unsigned dual_color_diffed_diffs:1;
 100 };
 101
 102 static inline void diff_flags_or(struct diff_flags *a,
 103                                  const struct diff_flags *b)
 104 {
 105         char *tmp_a = (char *)a;
 106         const char *tmp_b = (const char *)b;
 107         int i;
 108
 109         for (i = 0; i < sizeof(struct diff_flags); i++)
 110                 tmp_a[i] |= tmp_b[i];
 111 }
 112
 113 #define DIFF_XDL_TST(opts, flag)    ((opts)->xdl_opts & XDF_##flag)
 114 #define DIFF_XDL_SET(opts, flag)    ((opts)->xdl_opts |= XDF_##flag)
 115 #define DIFF_XDL_CLR(opts, flag)    ((opts)->xdl_opts &= ~XDF_##flag)
 116
 117 #define DIFF_WITH_ALG(opts, flag)   (((opts)->xdl_opts & ~XDF_DIFF_ALGORITHM_MASK) | XDF_##flag)
 118
 119 enum diff_words_type {
 120         DIFF_WORDS_NONE = 0,
 121         DIFF_WORDS_PORCELAIN,
 122         DIFF_WORDS_PLAIN,
 123         DIFF_WORDS_COLOR
 124 };
 125
 126 enum diff_submodule_format {
 127         DIFF_SUBMODULE_SHORT = 0,
 128         DIFF_SUBMODULE_LOG,
 129         DIFF_SUBMODULE_INLINE_DIFF
 130 };
 131
 132 struct diff_options {
 133         const char *orderfile;
 134         const char *pickaxe;
 135         const char *single_follow;
 136         const char *a_prefix, *b_prefix;
 137         const char *line_prefix;
 138         size_t line_prefix_length;
 139         struct diff_flags flags;
 140
 141         /* diff-filter bits */
 142         unsigned int filter;
 143
 144         int use_color;
 145         int context;
 146         int interhunkcontext;
 147         int break_opt;
 148         int detect_rename;
 149         int irreversible_delete;
 150         int skip_stat_unmatch;
 151         int line_termination;
 152         int output_format;
 153         unsigned pickaxe_opts;
 154         int rename_score;
 155         int rename_limit;
 156         int needed_rename_limit;
 157         int degraded_cc_to_c;
 158         int show_rename_progress;
 159         int dirstat_permille;
 160         int setup;
 161         int abbrev;
 162         int ita_invisible_in_index;
 163 /* white-space error highlighting */
 164 #define WSEH_NEW (1<<12)
 165 #define WSEH_CONTEXT (1<<13)
 166 #define WSEH_OLD (1<<14)
 167         unsigned ws_error_highlight;
 168         const char *prefix;
 169         int prefix_length;
 170         const char *stat_sep;
 171         long xdl_opts;
 172
 173         /* see Documentation/diff-options.txt */
 174         char **anchors;
 175         size_t anchors_nr, anchors_alloc;
 176
 177         int stat_width;
 178         int stat_name_width;
 179         int stat_graph_width;
 180         int stat_count;
 181         const char *word_regex;
 182         enum diff_words_type word_diff;
 183         enum diff_submodule_format submodule_format;
 184
 185         struct oidset *objfind;
 186
 187         /* this is set by diffcore for DIFF_FORMAT_PATCH */
 188         int found_changes;
 189
 190         /* to support internal diff recursion by --follow hack*/
 191         int found_follow;
 192
 193         void (*set_default)(struct diff_options *);
 194
 195         FILE *file;
 196         int close_file;
 197
 198 #define OUTPUT_INDICATOR_NEW 0
 199 #define OUTPUT_INDICATOR_OLD 1
 200 #define OUTPUT_INDICATOR_CONTEXT 2
 201         char output_indicators[3];
 202
 203         struct pathspec pathspec;
 204         pathchange_fn_t pathchange;
 205         change_fn_t change;
 206         add_remove_fn_t add_remove;
 207         void *change_fn_data;
 208         diff_format_fn_t format_callback;
 209         void *format_callback_data;
 210         diff_prefix_fn_t output_prefix;
 211         void *output_prefix_data;
 212
 213         int diff_path_counter;
 214
 215         struct emitted_diff_symbols *emitted_symbols;
 216         enum {
 217                 COLOR_MOVED_NO = 0,
 218                 COLOR_MOVED_PLAIN = 1,
 219                 COLOR_MOVED_BLOCKS = 2,
 220                 COLOR_MOVED_ZEBRA = 3,
 221                 COLOR_MOVED_ZEBRA_DIM = 4,
 222         } color_moved;
 223         #define COLOR_MOVED_DEFAULT COLOR_MOVED_ZEBRA
 224         #define COLOR_MOVED_MIN_ALNUM_COUNT 20
 225
 226         /* XDF_WHITESPACE_FLAGS regarding block detection are set at 2, 3, 4 */
 227         #define COLOR_MOVED_WS_ALLOW_INDENTATION_CHANGE (1<<5)
 228         int color_moved_ws_handling;
 229
 230         struct repository *repo;
 231 };
 232
 233 void diff_emit_submodule_del(struct diff_options *o, const char *line);
 234 void diff_emit_submodule_add(struct diff_options *o, const char *line);
 235 void diff_emit_submodule_untracked(struct diff_options *o, const char *path);
 236 void diff_emit_submodule_modified(struct diff_options *o, const char *path);
 237 void diff_emit_submodule_header(struct diff_options *o, const char *header);
 238 void diff_emit_submodule_error(struct diff_options *o, const char *err);
 239 void diff_emit_submodule_pipethrough(struct diff_options *o,
 240                                      const char *line, int len);
 241
 242 enum color_diff {
 243         DIFF_RESET = 0,
 244         DIFF_CONTEXT = 1,
 245         DIFF_METAINFO = 2,
 246         DIFF_FRAGINFO = 3,
 247         DIFF_FILE_OLD = 4,
 248         DIFF_FILE_NEW = 5,
 249         DIFF_COMMIT = 6,
 250         DIFF_WHITESPACE = 7,
 251         DIFF_FUNCINFO = 8,
 252         DIFF_FILE_OLD_MOVED = 9,
 253         DIFF_FILE_OLD_MOVED_ALT = 10,
 254         DIFF_FILE_OLD_MOVED_DIM = 11,
 255         DIFF_FILE_OLD_MOVED_ALT_DIM = 12,
 256         DIFF_FILE_NEW_MOVED = 13,
 257         DIFF_FILE_NEW_MOVED_ALT = 14,
 258         DIFF_FILE_NEW_MOVED_DIM = 15,
 259         DIFF_FILE_NEW_MOVED_ALT_DIM = 16,
 260         DIFF_CONTEXT_DIM = 17,
 261         DIFF_FILE_OLD_DIM = 18,
 262         DIFF_FILE_NEW_DIM = 19,
 263         DIFF_CONTEXT_BOLD = 20,
 264         DIFF_FILE_OLD_BOLD = 21,
 265         DIFF_FILE_NEW_BOLD = 22,
 266 };
 267 const char *diff_get_color(int diff_use_color, enum color_diff ix);
 268 #define diff_get_color_opt(o, ix) \
 269         diff_get_color((o)->use_color, ix)
 270
 271
 272 const char *diff_line_prefix(struct diff_options *);
 273
 274
 275 extern const char mime_boundary_leader[];
 276
 277 struct combine_diff_path *diff_tree_paths(
 278         struct combine_diff_path *p, const struct object_id *oid,
 279         const struct object_id **parents_oid, int nparent,
 280         struct strbuf *base, struct diff_options *opt);
 281 int diff_tree_oid(const struct object_id *old_oid,
 282                   const struct object_id *new_oid,
 283                   const char *base, struct diff_options *opt);
 284 int diff_root_tree_oid(const struct object_id *new_oid, const char *base,
 285                        struct diff_options *opt);
 286
 287 struct combine_diff_path {
 288         struct combine_diff_path *next;
 289         char *path;
 290         unsigned int mode;
 291         struct object_id oid;
 292         struct combine_diff_parent {
 293                 char status;
 294                 unsigned int mode;
 295                 struct object_id oid;
 296         } parent[FLEX_ARRAY];
 297 };
 298 #define combine_diff_path_size(n, l) \
 299         st_add4(sizeof(struct combine_diff_path), (l), 1, \
 300                 st_mult(sizeof(struct combine_diff_parent), (n)))
 301
 302 void show_combined_diff(struct combine_diff_path *elem, int num_parent,
 303                         int dense, struct rev_info *);
 304
 305 void diff_tree_combined(const struct object_id *oid, const struct oid_array *parents, int dense, struct rev_info *rev);
 306
 307 void diff_tree_combined_merge(const struct commit *commit, int dense, struct rev_info *rev);
 308
 309 void diff_set_mnemonic_prefix(struct diff_options *options, const char *a, const char *b);
 310
 311 int diff_can_quit_early(struct diff_options *);
 312
 313 void diff_addremove(struct diff_options *,
 314                     int addremove,
 315                     unsigned mode,
 316                     const struct object_id *oid,
 317                     int oid_valid,
 318                     const char *fullpath, unsigned dirty_submodule);
 319
 320 void diff_change(struct diff_options *,
 321                  unsigned mode1, unsigned mode2,
 322                  const struct object_id *old_oid,
 323                  const struct object_id *new_oid,
 324                  int old_oid_valid, int new_oid_valid,
 325                  const char *fullpath,
 326                  unsigned dirty_submodule1, unsigned dirty_submodule2);
 327
 328 struct diff_filepair *diff_unmerge(struct diff_options *, const char *path);
 329
 330 #define DIFF_SETUP_REVERSE              1
 331 #define DIFF_SETUP_USE_SIZE_CACHE       4
 332
 333 /*
 334  * Poor man's alternative to parse-option, to allow both stuck form
 335  * (--option=value) and separate form (--option value).
 336  */
 337 int parse_long_opt(const char *opt, const char **argv,
 338                    const char **optarg);
 339
 340 int git_diff_basic_config(const char *var, const char *value, void *cb);
 341 int git_diff_heuristic_config(const char *var, const char *value, void *cb);
 342 void init_diff_ui_defaults(void);
 343 int git_diff_ui_config(const char *var, const char *value, void *cb);
 344 #ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
 345 #define diff_setup(diffopts) repo_diff_setup(the_repository, diffopts)
 346 #endif
 347 void repo_diff_setup(struct repository *, struct diff_options *);
 348 int diff_opt_parse(struct diff_options *, const char **, int, const char *);
 349 void diff_setup_done(struct diff_options *);
 350 int git_config_rename(const char *var, const char *value);
 351
 352 #define DIFF_DETECT_RENAME      1
 353 #define DIFF_DETECT_COPY        2
 354
 355 #define DIFF_PICKAXE_ALL        1
 356 #define DIFF_PICKAXE_REGEX      2
 357
 358 #define DIFF_PICKAXE_KIND_S     4 /* traditional plumbing counter */
 359 #define DIFF_PICKAXE_KIND_G     8 /* grep in the patch */
 360 #define DIFF_PICKAXE_KIND_OBJFIND       16 /* specific object IDs */
 361
 362 #define DIFF_PICKAXE_KINDS_MASK (DIFF_PICKAXE_KIND_S | \
 363                                  DIFF_PICKAXE_KIND_G | \
 364                                  DIFF_PICKAXE_KIND_OBJFIND)
 365
 366 #define DIFF_PICKAXE_IGNORE_CASE        32
 367
 368 void diffcore_std(struct diff_options *);
 369 void diffcore_fix_diff_index(struct diff_options *);
 370
 371 #define COMMON_DIFF_OPTIONS_HELP \
 372 "\ncommon diff options:\n" \
 373 "  -z            output diff-raw with lines terminated with NUL.\n" \
 374 "  -p            output patch format.\n" \
 375 "  -u            synonym for -p.\n" \
 376 "  --patch-with-raw\n" \
 377 "                output both a patch and the diff-raw format.\n" \
 378 "  --stat        show diffstat instead of patch.\n" \
 379 "  --numstat     show numeric diffstat instead of patch.\n" \
 380 "  --patch-with-stat\n" \
 381 "                output a patch and prepend its diffstat.\n" \
 382 "  --name-only   show only names of changed files.\n" \
 383 "  --name-status show names and status of changed files.\n" \
 384 "  --full-index  show full object name on index lines.\n" \
 385 "  --abbrev=<n>  abbreviate object names in diff-tree header and diff-raw.\n" \
 386 "  -R            swap input file pairs.\n" \
 387 "  -B            detect complete rewrites.\n" \
 388 "  -M            detect renames.\n" \
 389 "  -C            detect copies.\n" \
 390 "  --find-copies-harder\n" \
 391 "                try unchanged files as candidate for copy detection.\n" \
 392 "  -l<n>         limit rename attempts up to <n> paths.\n" \
 393 "  -O<file>      reorder diffs according to the <file>.\n" \
 394 "  -S<string>    find filepair whose only one side contains the string.\n" \
 395 "  --pickaxe-all\n" \
 396 "                show all files diff when -S is used and hit is found.\n" \
 397 "  -a  --text    treat all files as text.\n"
 398
 399 int diff_queue_is_empty(void);
 400 void diff_flush(struct diff_options*);
 401 void diff_warn_rename_limit(const char *varname, int needed, int degraded_cc);
 402
 403 /* diff-raw status letters */
 404 #define DIFF_STATUS_ADDED               'A'
 405 #define DIFF_STATUS_COPIED              'C'
 406 #define DIFF_STATUS_DELETED             'D'
 407 #define DIFF_STATUS_MODIFIED            'M'
 408 #define DIFF_STATUS_RENAMED             'R'
 409 #define DIFF_STATUS_TYPE_CHANGED        'T'
 410 #define DIFF_STATUS_UNKNOWN             'X'
 411 #define DIFF_STATUS_UNMERGED            'U'
 412
 413 /* these are not diff-raw status letters proper, but used by
 414  * diffcore-filter insn to specify additional restrictions.
 415  */
 416 #define DIFF_STATUS_FILTER_AON          '*'
 417 #define DIFF_STATUS_FILTER_BROKEN       'B'
 418
 419 /*
 420  * This is different from find_unique_abbrev() in that
 421  * it stuffs the result with dots for alignment.
 422  */
 423 const char *diff_aligned_abbrev(const struct object_id *sha1, int);
 424
 425 /* do not report anything on removed paths */
 426 #define DIFF_SILENT_ON_REMOVED 01
 427 /* report racily-clean paths as modified */
 428 #define DIFF_RACY_IS_MODIFIED 02
 429 int run_diff_files(struct rev_info *revs, unsigned int option);
 430 int run_diff_index(struct rev_info *revs, int cached);
 431
 432 int do_diff_cache(const struct object_id *, struct diff_options *);
 433 int diff_flush_patch_id(struct diff_options *, struct object_id *, int);
 434
 435 int diff_result_code(struct diff_options *, int);
 436
 437 void diff_no_index(struct repository *, struct rev_info *, int, const char **);
 438
 439 int index_differs_from(struct repository *r, const char *def,
 440                        const struct diff_flags *flags,
 441                        int ita_invisible_in_index);
 442
 443 /*
 444  * Fill the contents of the filespec "df", respecting any textconv defined by
 445  * its userdiff driver.  The "driver" parameter must come from a
 446  * previous call to get_textconv(), and therefore should either be NULL or have
 447  * textconv enabled.
 448  *
 449  * Note that the memory ownership of the resulting buffer depends on whether
 450  * the driver field is NULL. If it is, then the memory belongs to the filespec
 451  * struct. If it is non-NULL, then "outbuf" points to a newly allocated buffer
 452  * that should be freed by the caller.
 453  */
 454 size_t fill_textconv(struct repository *r,
 455                      struct userdiff_driver *driver,
 456                      struct diff_filespec *df,
 457                      char **outbuf);
 458
 459 /*
 460  * Look up the userdiff driver for the given filespec, and return it if
 461  * and only if it has textconv enabled (otherwise return NULL). The result
 462  * can be passed to fill_textconv().
 463  */
 464 struct userdiff_driver *get_textconv(struct repository *r,
 465                                      struct diff_filespec *one);
 466
 467 /*
 468  * Prepare diff_filespec and convert it using diff textconv API
 469  * if the textconv driver exists.
 470  * Return 1 if the conversion succeeds, 0 otherwise.
 471  */
 472 int textconv_object(struct repository *repo,
 473                     const char *path,
 474                     unsigned mode,
 475                     const struct object_id *oid, int oid_valid,
 476                     char **buf, unsigned long *buf_size);
 477
 478 int parse_rename_score(const char **cp_p);
 479
 480 long parse_algorithm_value(const char *value);
 481
 482 void print_stat_summary(FILE *fp, int files,
 483                         int insertions, int deletions);
 484 void setup_diff_pager(struct diff_options *);
 485
 486 #endif /* DIFF_H */