2 5aa81393 2020-01-06 stsp * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3 c27a5e66 2020-11-18 stsp * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de>
5 404c43c4 2018-06-21 stsp * Permission to use, copy, modify, and distribute this software for any
6 404c43c4 2018-06-21 stsp * purpose with or without fee is hereby granted, provided that the above
7 404c43c4 2018-06-21 stsp * copyright notice and this permission notice appear in all copies.
9 404c43c4 2018-06-21 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 404c43c4 2018-06-21 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 404c43c4 2018-06-21 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 404c43c4 2018-06-21 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 404c43c4 2018-06-21 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 404c43c4 2018-06-21 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 404c43c4 2018-06-21 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 fe621944 2020-11-10 stsp #include <sys/mman.h>
19 404c43c4 2018-06-21 stsp #include <sys/stat.h>
21 8c35ff14 2020-11-19 stsp #include <errno.h>
22 404c43c4 2018-06-21 stsp #include <string.h>
23 404c43c4 2018-06-21 stsp #include <stdio.h>
24 404c43c4 2018-06-21 stsp #include <stdlib.h>
25 404c43c4 2018-06-21 stsp #include <time.h>
26 56e0773d 2019-11-28 stsp #include <limits.h>
27 404c43c4 2018-06-21 stsp #include <zlib.h>
29 dd038bc6 2021-09-21 thomas.ad #include "got_compat.h"
31 404c43c4 2018-06-21 stsp #include "got_error.h"
32 404c43c4 2018-06-21 stsp #include "got_object.h"
33 6fb7cd11 2019-08-22 stsp #include "got_cancel.h"
34 404c43c4 2018-06-21 stsp #include "got_blame.h"
35 6fb7cd11 2019-08-22 stsp #include "got_commit_graph.h"
36 404c43c4 2018-06-21 stsp #include "got_opentemp.h"
38 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
39 404c43c4 2018-06-21 stsp #include "got_lib_delta.h"
40 404c43c4 2018-06-21 stsp #include "got_lib_object.h"
41 404c43c4 2018-06-21 stsp #include "got_lib_diff.h"
44 fe621944 2020-11-10 stsp #define MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
47 404c43c4 2018-06-21 stsp struct got_blame_line {
48 404c43c4 2018-06-21 stsp int annotated;
49 9b94757a 2018-06-21 stsp struct got_object_id id;
52 404c43c4 2018-06-21 stsp struct got_blame {
53 cca5682e 2020-11-18 stsp struct diff_config *cfg;
54 8c35ff14 2020-11-19 stsp int nlines; /* number of lines in file being blamed */
55 8c35ff14 2020-11-19 stsp int nannotated; /* number of lines already annotated */
56 404c43c4 2018-06-21 stsp struct got_blame_line *lines; /* one per line */
57 c35a7943 2018-07-12 stsp int ncommits;
60 8c35ff14 2020-11-19 stsp * These change with every traversed commit. After diffing
61 8c35ff14 2020-11-19 stsp * commits N:N-1, in preparation for diffing commits N-1:N-2,
62 8c35ff14 2020-11-19 stsp * data for commit N is retained and flipped into data for N-1.
65 8c35ff14 2020-11-19 stsp FILE *f1; /* older version from commit N-1. */
66 8c35ff14 2020-11-19 stsp FILE *f2; /* newer version from commit N. */
68 8c35ff14 2020-11-19 stsp unsigned char *map1;
69 8c35ff14 2020-11-19 stsp unsigned char *map2;
70 8c35ff14 2020-11-19 stsp off_t size1;
71 8c35ff14 2020-11-19 stsp off_t size2;
72 8c35ff14 2020-11-19 stsp int nlines1;
73 8c35ff14 2020-11-19 stsp int nlines2;
74 8c35ff14 2020-11-19 stsp off_t *line_offsets1;
75 8c35ff14 2020-11-19 stsp off_t *line_offsets2;
78 c27a5e66 2020-11-18 stsp * Map line numbers of an older version of the file to valid line
79 8c35ff14 2020-11-19 stsp * numbers in the version of the file being blamed. This map is
80 8c35ff14 2020-11-19 stsp * updated with each commit we traverse throughout the file's history.
81 8c35ff14 2020-11-19 stsp * Lines mapped to -1 do not correspond to any line in the version
82 8c35ff14 2020-11-19 stsp * being blamed.
84 8c35ff14 2020-11-19 stsp int *linemap1;
85 c27a5e66 2020-11-18 stsp int *linemap2;
87 8c35ff14 2020-11-19 stsp struct diff_data *data1;
88 8c35ff14 2020-11-19 stsp struct diff_data *data2;
91 404c43c4 2018-06-21 stsp static const struct got_error *
92 10f173fe 2022-04-16 thomas annotate_line(struct got_blame *blame, int lineno,
93 10f173fe 2022-04-16 thomas struct got_commit_object *commit, struct got_object_id *id,
94 10f173fe 2022-04-16 thomas got_blame_cb cb, void *arg)
96 404c43c4 2018-06-21 stsp const struct got_error *err = NULL;
97 404c43c4 2018-06-21 stsp struct got_blame_line *line;
99 c27a5e66 2020-11-18 stsp if (lineno < 0 || lineno >= blame->nlines)
100 f2e233d8 2018-11-19 stsp return NULL;
102 c27a5e66 2020-11-18 stsp line = &blame->lines[lineno];
103 404c43c4 2018-06-21 stsp if (line->annotated)
104 84451b3e 2018-07-10 stsp return NULL;
106 404c43c4 2018-06-21 stsp memcpy(&line->id, id, sizeof(line->id));
107 404c43c4 2018-06-21 stsp line->annotated = 1;
108 06ca4d09 2018-11-19 stsp blame->nannotated++;
110 10f173fe 2022-04-16 thomas err = cb(arg, blame->nlines, lineno + 1, commit, id);
111 84451b3e 2018-07-10 stsp return err;
114 404c43c4 2018-06-21 stsp static const struct got_error *
115 8c35ff14 2020-11-19 stsp blame_changes(struct got_blame *blame, struct diff_result *diff_result,
116 10f173fe 2022-04-16 thomas struct got_commit_object *commit, struct got_object_id *commit_id,
117 10f173fe 2022-04-16 thomas got_blame_cb cb, void *arg)
119 c35a7943 2018-07-12 stsp const struct got_error *err = NULL;
121 c27a5e66 2020-11-18 stsp int idx1 = 0, idx2 = 0;
123 c27a5e66 2020-11-18 stsp for (i = 0; i < diff_result->chunks.len &&
124 c27a5e66 2020-11-18 stsp blame->nannotated < blame->nlines; i++) {
125 fe621944 2020-11-10 stsp struct diff_chunk *c = diff_chunk_get(diff_result, i);
126 5d7e2cd0 2021-10-29 thomas unsigned int left_count, right_count;
130 c27a5e66 2020-11-18 stsp * We do not need to worry about idx1/idx2 growing out
131 c27a5e66 2020-11-18 stsp * of bounds because the diff implementation ensures
132 c27a5e66 2020-11-18 stsp * that chunk ranges never exceed the number of lines
133 c27a5e66 2020-11-18 stsp * in the left/right input files.
135 c27a5e66 2020-11-18 stsp left_count = diff_chunk_get_left_count(c);
136 c27a5e66 2020-11-18 stsp right_count = diff_chunk_get_right_count(c);
138 c27a5e66 2020-11-18 stsp if (left_count == right_count) {
139 c27a5e66 2020-11-18 stsp for (j = 0; j < left_count; j++) {
140 8c35ff14 2020-11-19 stsp blame->linemap1[idx1++] =
141 8c35ff14 2020-11-19 stsp blame->linemap2[idx2++];
146 c27a5e66 2020-11-18 stsp if (right_count == 0) {
147 c27a5e66 2020-11-18 stsp for (j = 0; j < left_count; j++) {
148 8c35ff14 2020-11-19 stsp blame->linemap1[idx1++] = -1;
153 c27a5e66 2020-11-18 stsp for (j = 0; j < right_count; j++) {
154 c27a5e66 2020-11-18 stsp int ln = blame->linemap2[idx2++];
155 10f173fe 2022-04-16 thomas err = annotate_line(blame, ln, commit, commit_id,
156 10f173fe 2022-04-16 thomas cb, arg);
158 c35a7943 2018-07-12 stsp return err;
159 06ca4d09 2018-11-19 stsp if (blame->nlines == blame->nannotated)
164 c35a7943 2018-07-12 stsp return NULL;
167 c35a7943 2018-07-12 stsp static const struct got_error *
168 8c35ff14 2020-11-19 stsp blame_prepare_file(FILE *f, unsigned char **p, off_t *size,
169 8c35ff14 2020-11-19 stsp int *nlines, off_t **line_offsets, struct diff_data *diff_data,
170 8c35ff14 2020-11-19 stsp const struct diff_config *cfg, struct got_blob_object *blob)
172 8c35ff14 2020-11-19 stsp const struct got_error *err = NULL;
173 b4737997 2020-11-21 stsp int diff_flags = 0, rc;
175 8c35ff14 2020-11-19 stsp err = got_object_blob_dump_to_file(size, nlines, line_offsets,
178 8c35ff14 2020-11-19 stsp return err;
180 8c35ff14 2020-11-19 stsp #ifndef GOT_DIFF_NO_MMAP
181 8c35ff14 2020-11-19 stsp *p = mmap(NULL, *size, PROT_READ, MAP_PRIVATE, fileno(f), 0);
182 8c35ff14 2020-11-19 stsp if (*p == MAP_FAILED)
184 8c35ff14 2020-11-19 stsp *p = NULL; /* fall back on file I/O */
186 b4737997 2020-11-21 stsp /* Allow blaming lines in binary files even though it's useless. */
187 b4737997 2020-11-21 stsp diff_flags |= DIFF_FLAG_FORCE_TEXT_DATA;
189 b4737997 2020-11-21 stsp rc = diff_atomize_file(diff_data, cfg, f, *p, *size, diff_flags);
191 8c35ff14 2020-11-19 stsp return got_error_set_errno(rc, "diff_atomize_file");
193 8c35ff14 2020-11-19 stsp return NULL;
196 8c35ff14 2020-11-19 stsp static const struct got_error *
197 c27a5e66 2020-11-18 stsp blame_commit(struct got_blame *blame, struct got_object_id *id,
198 c27a5e66 2020-11-18 stsp const char *path, struct got_repository *repo,
199 10f173fe 2022-04-16 thomas got_blame_cb cb, void *arg)
201 404c43c4 2018-06-21 stsp const struct got_error *err = NULL;
202 945f9229 2022-04-16 thomas struct got_commit_object *commit = NULL, *pcommit = NULL;
203 c27a5e66 2020-11-18 stsp struct got_object_qid *pid = NULL;
204 8c35ff14 2020-11-19 stsp struct got_object_id *pblob_id = NULL;
205 8c35ff14 2020-11-19 stsp struct got_blob_object *pblob = NULL;
206 8c35ff14 2020-11-19 stsp struct diff_result *diff_result = NULL;
208 c27a5e66 2020-11-18 stsp err = got_object_open_as_commit(&commit, repo, id);
210 8d725ae1 2019-08-18 stsp return err;
212 dbdddfee 2021-06-23 naddy pid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
213 c27a5e66 2020-11-18 stsp if (pid == NULL) {
214 c27a5e66 2020-11-18 stsp got_object_commit_close(commit);
215 c27a5e66 2020-11-18 stsp return NULL;
218 ec242592 2022-04-22 thomas err = got_object_open_as_commit(&pcommit, repo, &pid->id);
220 945f9229 2022-04-16 thomas goto done;
222 945f9229 2022-04-16 thomas err = got_object_id_by_path(&pblob_id, repo, pcommit, path);
224 4c9641fd 2019-08-21 stsp if (err->code == GOT_ERR_NO_TREE_ENTRY)
225 4c9641fd 2019-08-21 stsp err = NULL;
229 9117a7b7 2022-07-01 thomas err = got_object_open_as_blob(&pblob, repo, pblob_id, 8192, blame->fd);
233 8c35ff14 2020-11-19 stsp err = blame_prepare_file(blame->f1, &blame->map1, &blame->size1,
234 8c35ff14 2020-11-19 stsp &blame->nlines1, &blame->line_offsets1, blame->data1,
235 8c35ff14 2020-11-19 stsp blame->cfg, pblob);
239 8c35ff14 2020-11-19 stsp diff_result = diff_main(blame->cfg, blame->data1, blame->data2);
240 8c35ff14 2020-11-19 stsp if (diff_result == NULL) {
241 8c35ff14 2020-11-19 stsp err = got_error_set_errno(ENOMEM, "malloc");
244 8c35ff14 2020-11-19 stsp if (diff_result->rc != DIFF_RC_OK) {
245 8c35ff14 2020-11-19 stsp err = got_error_set_errno(diff_result->rc, "diff");
248 8c35ff14 2020-11-19 stsp if (diff_result->chunks.len > 0) {
249 8c35ff14 2020-11-19 stsp if (blame->nlines1 > 0) {
250 8c35ff14 2020-11-19 stsp blame->linemap1 = calloc(blame->nlines1,
251 8c35ff14 2020-11-19 stsp sizeof(*blame->linemap1));
252 8c35ff14 2020-11-19 stsp if (blame->linemap1 == NULL) {
253 c27a5e66 2020-11-18 stsp err = got_error_from_errno("malloc");
257 10f173fe 2022-04-16 thomas err = blame_changes(blame, diff_result, commit, id, cb, arg);
260 d68a0a7d 2018-07-10 stsp } else if (cb)
261 10f173fe 2022-04-16 thomas err = cb(arg, blame->nlines, -1, commit, id);
263 8c35ff14 2020-11-19 stsp if (diff_result)
264 8c35ff14 2020-11-19 stsp diff_result_free(diff_result);
265 8d725ae1 2019-08-18 stsp if (commit)
266 8d725ae1 2019-08-18 stsp got_object_commit_close(commit);
267 945f9229 2022-04-16 thomas if (pcommit)
268 945f9229 2022-04-16 thomas got_object_commit_close(pcommit);
269 c27a5e66 2020-11-18 stsp free(pblob_id);
271 c27a5e66 2020-11-18 stsp got_object_blob_close(pblob);
272 404c43c4 2018-06-21 stsp return err;
275 fb43ecf1 2019-02-11 stsp static const struct got_error *
276 404c43c4 2018-06-21 stsp blame_close(struct got_blame *blame)
278 fb43ecf1 2019-02-11 stsp const struct got_error *err = NULL;
280 8c35ff14 2020-11-19 stsp diff_data_free(blame->data1);
281 8c35ff14 2020-11-19 stsp free(blame->data1);
282 8c35ff14 2020-11-19 stsp diff_data_free(blame->data2);
283 8c35ff14 2020-11-19 stsp free(blame->data2);
284 8c35ff14 2020-11-19 stsp if (blame->map1) {
285 8c35ff14 2020-11-19 stsp if (munmap(blame->map1, blame->size1) == -1 && err == NULL)
286 8c35ff14 2020-11-19 stsp err = got_error_from_errno("munmap");
288 8c35ff14 2020-11-19 stsp if (blame->map2) {
289 8c35ff14 2020-11-19 stsp if (munmap(blame->map2, blame->size2) == -1 && err == NULL)
290 8c35ff14 2020-11-19 stsp err = got_error_from_errno("munmap");
292 404c43c4 2018-06-21 stsp free(blame->lines);
293 8c35ff14 2020-11-19 stsp free(blame->line_offsets1);
294 8c35ff14 2020-11-19 stsp free(blame->line_offsets2);
295 8c35ff14 2020-11-19 stsp free(blame->linemap1);
296 c27a5e66 2020-11-18 stsp free(blame->linemap2);
297 cca5682e 2020-11-18 stsp free(blame->cfg);
298 404c43c4 2018-06-21 stsp free(blame);
299 fb43ecf1 2019-02-11 stsp return err;
303 8c35ff14 2020-11-19 stsp atomize_file(struct diff_data *d, FILE *f, off_t filesize, int nlines,
304 8c35ff14 2020-11-19 stsp off_t *line_offsets)
306 8c35ff14 2020-11-19 stsp int i, rc = DIFF_RC_OK;
307 b4737997 2020-11-21 stsp int embedded_nul = 0;
309 8c35ff14 2020-11-19 stsp ARRAYLIST_INIT(d->atoms, nlines);
311 8c35ff14 2020-11-19 stsp for (i = 0; i < nlines; i++) {
312 8c35ff14 2020-11-19 stsp struct diff_atom *atom;
313 8c35ff14 2020-11-19 stsp off_t len, pos = line_offsets[i];
314 8c35ff14 2020-11-19 stsp unsigned int hash = 0;
317 8c35ff14 2020-11-19 stsp ARRAYLIST_ADD(atom, d->atoms);
318 8c35ff14 2020-11-19 stsp if (atom == NULL) {
319 8c35ff14 2020-11-19 stsp rc = errno;
323 8c35ff14 2020-11-19 stsp if (i < nlines - 1)
324 8c35ff14 2020-11-19 stsp len = line_offsets[i + 1] - pos;
326 8c35ff14 2020-11-19 stsp len = filesize - pos;
328 8c35ff14 2020-11-19 stsp if (fseeko(f, pos, SEEK_SET) == -1) {
329 8c35ff14 2020-11-19 stsp rc = errno;
332 8c35ff14 2020-11-19 stsp for (j = 0; j < len; j++) {
333 8c35ff14 2020-11-19 stsp int c = fgetc(f);
334 8c35ff14 2020-11-19 stsp if (c == EOF) {
335 8c35ff14 2020-11-19 stsp if (feof(f))
336 8c35ff14 2020-11-19 stsp rc = EIO; /* unexpected EOF */
338 8c35ff14 2020-11-19 stsp rc = errno;
342 8c35ff14 2020-11-19 stsp hash = diff_atom_hash_update(hash, (unsigned char)c);
344 b4737997 2020-11-21 stsp if (c == '\0')
345 b4737997 2020-11-21 stsp embedded_nul = 1;
348 8c35ff14 2020-11-19 stsp *atom = (struct diff_atom){
350 8c35ff14 2020-11-19 stsp .pos = pos,
351 8c35ff14 2020-11-19 stsp .at = NULL, /* atom data is not memory-mapped */
352 8c35ff14 2020-11-19 stsp .len = len,
353 8c35ff14 2020-11-19 stsp .hash = hash,
357 b4737997 2020-11-21 stsp /* File are considered binary if they contain embedded '\0' bytes. */
358 b4737997 2020-11-21 stsp if (embedded_nul)
359 b4737997 2020-11-21 stsp d->atomizer_flags |= DIFF_ATOMIZER_FOUND_BINARY_DATA;
362 8c35ff14 2020-11-19 stsp ARRAYLIST_FREE(d->atoms);
368 8c35ff14 2020-11-19 stsp atomize_file_mmap(struct diff_data *d, unsigned char *p,
369 8c35ff14 2020-11-19 stsp off_t filesize, int nlines, off_t *line_offsets)
371 8c35ff14 2020-11-19 stsp int i, rc = DIFF_RC_OK;
372 b4737997 2020-11-21 stsp int embedded_nul = 0;
374 8c35ff14 2020-11-19 stsp ARRAYLIST_INIT(d->atoms, nlines);
376 8c35ff14 2020-11-19 stsp for (i = 0; i < nlines; i++) {
377 8c35ff14 2020-11-19 stsp struct diff_atom *atom;
378 8c35ff14 2020-11-19 stsp off_t len, pos = line_offsets[i];
379 8c35ff14 2020-11-19 stsp unsigned int hash = 0;
382 8c35ff14 2020-11-19 stsp ARRAYLIST_ADD(atom, d->atoms);
383 8c35ff14 2020-11-19 stsp if (atom == NULL) {
384 8c35ff14 2020-11-19 stsp rc = errno;
388 8c35ff14 2020-11-19 stsp if (i < nlines - 1)
389 8c35ff14 2020-11-19 stsp len = line_offsets[i + 1] - pos;
391 8c35ff14 2020-11-19 stsp len = filesize - pos;
393 8c35ff14 2020-11-19 stsp for (j = 0; j < len; j++)
394 8c35ff14 2020-11-19 stsp hash = diff_atom_hash_update(hash, p[pos + j]);
396 b4737997 2020-11-21 stsp if (!embedded_nul && memchr(&p[pos], '\0', len) != NULL)
397 b4737997 2020-11-21 stsp embedded_nul = 1;
399 8c35ff14 2020-11-19 stsp *atom = (struct diff_atom){
401 8c35ff14 2020-11-19 stsp .pos = pos,
402 8c35ff14 2020-11-19 stsp .at = &p[pos],
403 8c35ff14 2020-11-19 stsp .len = len,
404 8c35ff14 2020-11-19 stsp .hash = hash,
408 b4737997 2020-11-21 stsp /* File are considered binary if they contain embedded '\0' bytes. */
409 b4737997 2020-11-21 stsp if (embedded_nul)
410 b4737997 2020-11-21 stsp d->atomizer_flags |= DIFF_ATOMIZER_FOUND_BINARY_DATA;
413 8c35ff14 2020-11-19 stsp ARRAYLIST_FREE(d->atoms);
418 8c35ff14 2020-11-19 stsp /* Implements diff_atomize_func_t */
420 8c35ff14 2020-11-19 stsp blame_atomize_file(void *arg, struct diff_data *d)
422 8c35ff14 2020-11-19 stsp struct got_blame *blame = arg;
424 8c35ff14 2020-11-19 stsp if (d->f == blame->f1) {
425 8c35ff14 2020-11-19 stsp if (blame->map1)
426 8c35ff14 2020-11-19 stsp return atomize_file_mmap(d, blame->map1,
427 8c35ff14 2020-11-19 stsp blame->size1, blame->nlines1,
428 8c35ff14 2020-11-19 stsp blame->line_offsets1);
430 8c35ff14 2020-11-19 stsp return atomize_file(d, blame->f1, blame->size1,
431 8c35ff14 2020-11-19 stsp blame->nlines1, blame->line_offsets1);
432 8c35ff14 2020-11-19 stsp } else if (d->f == blame->f2) {
433 8c35ff14 2020-11-19 stsp if (d->atoms.len > 0) {
434 8c35ff14 2020-11-19 stsp /* Re-use data from previous commit. */
435 8c35ff14 2020-11-19 stsp return DIFF_RC_OK;
437 8c35ff14 2020-11-19 stsp if (blame->map2)
438 8c35ff14 2020-11-19 stsp return atomize_file_mmap(d, blame->map2,
439 8c35ff14 2020-11-19 stsp blame->size2, blame->nlines2,
440 8c35ff14 2020-11-19 stsp blame->line_offsets2);
442 8c35ff14 2020-11-19 stsp return atomize_file(d, blame->f2, blame->size2,
443 8c35ff14 2020-11-19 stsp blame->nlines2, blame->line_offsets2);
446 8c35ff14 2020-11-19 stsp return DIFF_RC_OK;
449 404c43c4 2018-06-21 stsp static const struct got_error *
450 9117a7b7 2022-07-01 thomas flip_files(struct got_blame *blame)
452 9117a7b7 2022-07-01 thomas const struct got_error *err = NULL;
453 8c35ff14 2020-11-19 stsp struct diff_data *d;
454 9117a7b7 2022-07-01 thomas FILE *tmp;
456 8c35ff14 2020-11-19 stsp free(blame->line_offsets2);
457 8c35ff14 2020-11-19 stsp blame->line_offsets2 = blame->line_offsets1;
458 8c35ff14 2020-11-19 stsp blame->line_offsets1 = NULL;
460 8c35ff14 2020-11-19 stsp free(blame->linemap2);
461 8c35ff14 2020-11-19 stsp blame->linemap2 = blame->linemap1;
462 8c35ff14 2020-11-19 stsp blame->linemap1 = NULL;
464 8c35ff14 2020-11-19 stsp if (blame->map2) {
465 8c35ff14 2020-11-19 stsp if (munmap(blame->map2, blame->size2) == -1)
466 8c35ff14 2020-11-19 stsp return got_error_from_errno("munmap");
467 8c35ff14 2020-11-19 stsp blame->map2 = blame->map1;
468 5e9266f9 2020-11-28 naddy blame->map1 = NULL;
470 8c35ff14 2020-11-19 stsp blame->size2 = blame->size1;
472 9117a7b7 2022-07-01 thomas err = got_opentemp_truncate(blame->f2);
474 9117a7b7 2022-07-01 thomas return err;
475 9117a7b7 2022-07-01 thomas tmp = blame->f2;
476 8c35ff14 2020-11-19 stsp blame->f2 = blame->f1;
477 9117a7b7 2022-07-01 thomas blame->f1 = tmp;
478 9117a7b7 2022-07-01 thomas blame->size1 = 0;
480 8c35ff14 2020-11-19 stsp blame->nlines2 = blame->nlines1;
481 8c35ff14 2020-11-19 stsp blame->nlines1 = 0;
483 8c35ff14 2020-11-19 stsp diff_data_free(blame->data2); /* does not free pointer itself */
484 8c35ff14 2020-11-19 stsp memset(blame->data2, 0, sizeof(*blame->data2));
485 8c35ff14 2020-11-19 stsp d = blame->data2;
486 8c35ff14 2020-11-19 stsp blame->data2 = blame->data1;
487 8c35ff14 2020-11-19 stsp blame->data1 = d;
489 8c35ff14 2020-11-19 stsp return NULL;
492 8c35ff14 2020-11-19 stsp static const struct got_error *
493 404c43c4 2018-06-21 stsp blame_open(struct got_blame **blamep, const char *path,
494 84451b3e 2018-07-10 stsp struct got_object_id *start_commit_id, struct got_repository *repo,
495 00a8878e 2022-07-01 thomas got_blame_cb cb, void *arg, got_cancel_cb cancel_cb, void *cancel_arg,
496 9117a7b7 2022-07-01 thomas int fd1, int fd2, FILE *f1, FILE *f2)
498 404c43c4 2018-06-21 stsp const struct got_error *err = NULL;
499 10f173fe 2022-04-16 thomas struct got_commit_object *start_commit = NULL, *last_commit = NULL;
500 27d434c2 2018-09-15 stsp struct got_object_id *obj_id = NULL;
501 404c43c4 2018-06-21 stsp struct got_blob_object *blob = NULL;
502 404c43c4 2018-06-21 stsp struct got_blame *blame = NULL;
503 c27a5e66 2020-11-18 stsp struct got_object_id *id = NULL;
504 00a8878e 2022-07-01 thomas int lineno;
505 293f6400 2018-09-20 stsp struct got_commit_graph *graph = NULL;
507 404c43c4 2018-06-21 stsp *blamep = NULL;
509 945f9229 2022-04-16 thomas err = got_object_open_as_commit(&start_commit, repo, start_commit_id);
513 945f9229 2022-04-16 thomas err = got_object_id_by_path(&obj_id, repo, start_commit, path);
515 945f9229 2022-04-16 thomas goto done;
517 9117a7b7 2022-07-01 thomas err = got_object_open_as_blob(&blob, repo, obj_id, 8192, fd1);
521 8c35ff14 2020-11-19 stsp blame = calloc(1, sizeof(*blame));
522 8c35ff14 2020-11-19 stsp if (blame == NULL) {
523 8c35ff14 2020-11-19 stsp err = got_error_from_errno("calloc");
527 8c35ff14 2020-11-19 stsp blame->data1 = calloc(1, sizeof(*blame->data1));
528 8c35ff14 2020-11-19 stsp if (blame->data1 == NULL) {
529 8c35ff14 2020-11-19 stsp err = got_error_from_errno("calloc");
532 8c35ff14 2020-11-19 stsp blame->data2 = calloc(1, sizeof(*blame->data2));
533 8c35ff14 2020-11-19 stsp if (blame->data2 == NULL) {
534 c27a5e66 2020-11-18 stsp err = got_error_from_errno("calloc");
538 9117a7b7 2022-07-01 thomas blame->f1 = f1;
539 9117a7b7 2022-07-01 thomas blame->f2 = f2;
540 9117a7b7 2022-07-01 thomas blame->fd = fd2;
542 cca5682e 2020-11-18 stsp err = got_diff_get_config(&blame->cfg, GOT_DIFF_ALGORITHM_PATIENCE,
543 8c35ff14 2020-11-19 stsp blame_atomize_file, blame);
547 8c35ff14 2020-11-19 stsp err = blame_prepare_file(blame->f2, &blame->map2, &blame->size2,
548 8c35ff14 2020-11-19 stsp &blame->nlines2, &blame->line_offsets2, blame->data2,
549 8c35ff14 2020-11-19 stsp blame->cfg, blob);
550 8c35ff14 2020-11-19 stsp blame->nlines = blame->nlines2;
551 8c35ff14 2020-11-19 stsp if (err || blame->nlines == 0)
554 8c35ff14 2020-11-19 stsp got_object_blob_close(blob);
555 8c35ff14 2020-11-19 stsp blob = NULL;
557 b02560ec 2019-08-19 stsp /* Don't include \n at EOF in the blame line count. */
558 8c35ff14 2020-11-19 stsp if (blame->line_offsets2[blame->nlines - 1] == blame->size2)
559 b02560ec 2019-08-19 stsp blame->nlines--;
561 404c43c4 2018-06-21 stsp blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
562 404c43c4 2018-06-21 stsp if (blame->lines == NULL) {
563 638f9024 2019-05-13 stsp err = got_error_from_errno("calloc");
567 c27a5e66 2020-11-18 stsp blame->linemap2 = calloc(blame->nlines2, sizeof(*blame->linemap2));
568 c27a5e66 2020-11-18 stsp if (blame->linemap2 == NULL) {
569 c27a5e66 2020-11-18 stsp err = got_error_from_errno("calloc");
572 c27a5e66 2020-11-18 stsp for (lineno = 0; lineno < blame->nlines2; lineno++)
573 c27a5e66 2020-11-18 stsp blame->linemap2[lineno] = lineno;
575 3d509237 2020-01-04 stsp err = got_commit_graph_open(&graph, path, 1);
579 6fb7cd11 2019-08-22 stsp err = got_commit_graph_iter_start(graph, start_commit_id, repo,
580 6fb7cd11 2019-08-22 stsp cancel_cb, cancel_arg);
584 c27a5e66 2020-11-18 stsp struct got_object_id *next_id;
585 c27a5e66 2020-11-18 stsp err = got_commit_graph_iter_next(&next_id, graph, repo,
586 ee780d5c 2020-01-04 stsp cancel_cb, cancel_arg);
588 c27a5e66 2020-11-18 stsp if (err->code == GOT_ERR_ITER_COMPLETED) {
589 4c9641fd 2019-08-21 stsp err = NULL;
594 c27a5e66 2020-11-18 stsp if (next_id) {
595 c27a5e66 2020-11-18 stsp id = next_id;
596 c27a5e66 2020-11-18 stsp err = blame_commit(blame, id, path, repo, cb, arg);
598 293f6400 2018-09-20 stsp if (err->code == GOT_ERR_ITER_COMPLETED)
599 293f6400 2018-09-20 stsp err = NULL;
602 06ca4d09 2018-11-19 stsp if (blame->nannotated == blame->nlines)
605 9117a7b7 2022-07-01 thomas err = flip_files(blame);
611 06ca4d09 2018-11-19 stsp if (id && blame->nannotated < blame->nlines) {
612 293f6400 2018-09-20 stsp /* Annotate remaining non-annotated lines with last commit. */
613 10f173fe 2022-04-16 thomas err = got_object_open_as_commit(&last_commit, repo, id);
615 10f173fe 2022-04-16 thomas goto done;
616 c27a5e66 2020-11-18 stsp for (lineno = 0; lineno < blame->nlines; lineno++) {
617 10f173fe 2022-04-16 thomas err = annotate_line(blame, lineno, last_commit, id,
618 10f173fe 2022-04-16 thomas cb, arg);
626 293f6400 2018-09-20 stsp got_commit_graph_close(graph);
627 27d434c2 2018-09-15 stsp free(obj_id);
629 404c43c4 2018-06-21 stsp got_object_blob_close(blob);
630 945f9229 2022-04-16 thomas if (start_commit)
631 945f9229 2022-04-16 thomas got_object_commit_close(start_commit);
632 10f173fe 2022-04-16 thomas if (last_commit)
633 10f173fe 2022-04-16 thomas got_object_commit_close(last_commit);
636 1828273a 2018-07-09 stsp blame_close(blame);
638 404c43c4 2018-06-21 stsp *blamep = blame;
640 404c43c4 2018-06-21 stsp return err;
643 84451b3e 2018-07-10 stsp const struct got_error *
644 0d8ff7d5 2019-08-14 stsp got_blame(const char *path, struct got_object_id *commit_id,
645 10f173fe 2022-04-16 thomas struct got_repository *repo, got_blame_cb cb, void *arg,
646 9117a7b7 2022-07-01 thomas got_cancel_cb cancel_cb, void* cancel_arg, int fd1, int fd2, FILE *f1,
647 9117a7b7 2022-07-01 thomas FILE *f2)
649 fb43ecf1 2019-02-11 stsp const struct got_error *err = NULL, *close_err = NULL;
650 84451b3e 2018-07-10 stsp struct got_blame *blame;
651 84451b3e 2018-07-10 stsp char *abspath;
653 84451b3e 2018-07-10 stsp if (asprintf(&abspath, "%s%s", path[0] == '/' ? "" : "/", path) == -1)
654 638f9024 2019-05-13 stsp return got_error_from_errno2("asprintf", path);
656 6fb7cd11 2019-08-22 stsp err = blame_open(&blame, abspath, commit_id, repo, cb, arg,
657 9117a7b7 2022-07-01 thomas cancel_cb, cancel_arg, fd1, fd2, f1, f2);
658 84451b3e 2018-07-10 stsp free(abspath);
660 fb43ecf1 2019-02-11 stsp close_err = blame_close(blame);
661 fb43ecf1 2019-02-11 stsp return err ? err : close_err;
