1 404c43c4 2018-06-21 stsp /*
  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>
  4 404c43c4 2018-06-21 stsp  *
  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.
  8 404c43c4 2018-06-21 stsp  *
  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.
 16 404c43c4 2018-06-21 stsp  */
 17 404c43c4 2018-06-21 stsp 
 18 404c43c4 2018-06-21 stsp #include <sys/queue.h>
 19 fe621944 2020-11-10 stsp #include <sys/mman.h>
 20 404c43c4 2018-06-21 stsp #include <sys/stat.h>
 21 404c43c4 2018-06-21 stsp 
 22 8c35ff14 2020-11-19 stsp #include <errno.h>
 23 404c43c4 2018-06-21 stsp #include <sha1.h>
 24 404c43c4 2018-06-21 stsp #include <string.h>
 25 404c43c4 2018-06-21 stsp #include <stdio.h>
 26 404c43c4 2018-06-21 stsp #include <stdlib.h>
 27 404c43c4 2018-06-21 stsp #include <time.h>
 28 56e0773d 2019-11-28 stsp #include <limits.h>
 29 404c43c4 2018-06-21 stsp #include <util.h>
 30 404c43c4 2018-06-21 stsp #include <zlib.h>
 31 404c43c4 2018-06-21 stsp 
 32 404c43c4 2018-06-21 stsp #include "got_error.h"
 33 404c43c4 2018-06-21 stsp #include "got_object.h"
 34 6fb7cd11 2019-08-22 stsp #include "got_cancel.h"
 35 404c43c4 2018-06-21 stsp #include "got_blame.h"
 36 6fb7cd11 2019-08-22 stsp #include "got_commit_graph.h"
 37 404c43c4 2018-06-21 stsp #include "got_opentemp.h"
 38 404c43c4 2018-06-21 stsp 
 39 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
 40 404c43c4 2018-06-21 stsp #include "got_lib_delta.h"
 41 404c43c4 2018-06-21 stsp #include "got_lib_object.h"
 42 404c43c4 2018-06-21 stsp #include "got_lib_diff.h"
 43 404c43c4 2018-06-21 stsp 
 44 fe621944 2020-11-10 stsp #ifndef MAX
 45 fe621944 2020-11-10 stsp #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
 46 fe621944 2020-11-10 stsp #endif
 47 fe621944 2020-11-10 stsp 
 48 404c43c4 2018-06-21 stsp struct got_blame_line {
 49 404c43c4 2018-06-21 stsp 	int annotated;
 50 9b94757a 2018-06-21 stsp 	struct got_object_id id;
 51 404c43c4 2018-06-21 stsp };
 52 404c43c4 2018-06-21 stsp 
 53 404c43c4 2018-06-21 stsp struct got_blame {
 54 cca5682e 2020-11-18 stsp 	struct diff_config *cfg;
 55 8c35ff14 2020-11-19 stsp 	int nlines;	/* number of lines in file being blamed */
 56 8c35ff14 2020-11-19 stsp 	int nannotated;	/* number of lines already annotated */
 57 404c43c4 2018-06-21 stsp 	struct got_blame_line *lines; /* one per line */
 58 c35a7943 2018-07-12 stsp 	int ncommits;
 59 c27a5e66 2020-11-18 stsp 
 60 c27a5e66 2020-11-18 stsp 	/*
 61 8c35ff14 2020-11-19 stsp 	 * These change with every traversed commit. After diffing
 62 8c35ff14 2020-11-19 stsp 	 * commits N:N-1, in preparation for diffing commits N-1:N-2,
 63 8c35ff14 2020-11-19 stsp 	 * data for commit N is retained and flipped into data for N-1.
 64 8c35ff14 2020-11-19 stsp 	 * 
 65 8c35ff14 2020-11-19 stsp 	 */
 66 8c35ff14 2020-11-19 stsp 	FILE *f1; /* older version from commit N-1. */
 67 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;
 76 8c35ff14 2020-11-19 stsp 
 77 8c35ff14 2020-11-19 stsp 	/*
 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.
 83 c27a5e66 2020-11-18 stsp 	 */
 84 8c35ff14 2020-11-19 stsp 	int *linemap1;
 85 c27a5e66 2020-11-18 stsp 	int *linemap2;
 86 8c35ff14 2020-11-19 stsp 
 87 8c35ff14 2020-11-19 stsp 	struct diff_data *data1;
 88 8c35ff14 2020-11-19 stsp 	struct diff_data *data2;
 89 404c43c4 2018-06-21 stsp };
 90 404c43c4 2018-06-21 stsp 
 91 404c43c4 2018-06-21 stsp static const struct got_error *
 92 392891ce 2022-04-07 stsp annotate_line(struct got_blame *blame, int lineno,
 93 392891ce 2022-04-07 stsp     struct got_commit_object *commit, struct got_object_id *id,
 94 392891ce 2022-04-07 stsp     got_blame_cb cb, void *arg)
 95 404c43c4 2018-06-21 stsp {
 96 404c43c4 2018-06-21 stsp 	const struct got_error *err = NULL;
 97 404c43c4 2018-06-21 stsp 	struct got_blame_line *line;
 98 404c43c4 2018-06-21 stsp 
 99 c27a5e66 2020-11-18 stsp 	if (lineno < 0 || lineno >= blame->nlines)
100 f2e233d8 2018-11-19 stsp 		return NULL;
101 3168e5da 2020-09-10 stsp 
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;
105 404c43c4 2018-06-21 stsp 
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++;
109 84451b3e 2018-07-10 stsp 	if (cb)
110 392891ce 2022-04-07 stsp 		err = cb(arg, blame->nlines, lineno + 1, commit, id);
111 84451b3e 2018-07-10 stsp 	return err;
112 404c43c4 2018-06-21 stsp }
113 404c43c4 2018-06-21 stsp 
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 392891ce 2022-04-07 stsp     struct got_commit_object *commit, struct got_object_id *commit_id,
117 392891ce 2022-04-07 stsp     got_blame_cb cb, void *arg)
118 c35a7943 2018-07-12 stsp {
119 c35a7943 2018-07-12 stsp 	const struct got_error *err = NULL;
120 fe621944 2020-11-10 stsp 	int i;
121 c27a5e66 2020-11-18 stsp 	int idx1 = 0, idx2 = 0;
122 c35a7943 2018-07-12 stsp 
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 47a90748 2021-10-27 naddy 		unsigned int left_count, right_count;
127 c27a5e66 2020-11-18 stsp 		int j;
128 c35a7943 2018-07-12 stsp 
129 c27a5e66 2020-11-18 stsp 		/*
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.
134 c27a5e66 2020-11-18 stsp 		 */
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);
137 c27a5e66 2020-11-18 stsp 
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++];
142 c27a5e66 2020-11-18 stsp 			}
143 fe621944 2020-11-10 stsp 			continue;
144 c27a5e66 2020-11-18 stsp 		}
145 fe621944 2020-11-10 stsp 
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;
149 c27a5e66 2020-11-18 stsp 			}
150 fe621944 2020-11-10 stsp 			continue;
151 c27a5e66 2020-11-18 stsp 		}
152 fe621944 2020-11-10 stsp 
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 392891ce 2022-04-07 stsp 			err = annotate_line(blame, ln, commit, commit_id,
156 392891ce 2022-04-07 stsp 			    cb, arg);
157 c35a7943 2018-07-12 stsp 			if (err)
158 c35a7943 2018-07-12 stsp 				return err;
159 06ca4d09 2018-11-19 stsp 			if (blame->nlines == blame->nannotated)
160 4c9641fd 2019-08-21 stsp 				break;
161 c35a7943 2018-07-12 stsp 		}
162 c35a7943 2018-07-12 stsp 	}
163 c35a7943 2018-07-12 stsp 
164 c35a7943 2018-07-12 stsp 	return NULL;
165 c35a7943 2018-07-12 stsp }
166 c35a7943 2018-07-12 stsp 
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)
171 8c35ff14 2020-11-19 stsp {
172 8c35ff14 2020-11-19 stsp 	const struct got_error *err = NULL;
173 b4737997 2020-11-21 stsp 	int diff_flags = 0, rc;
174 8c35ff14 2020-11-19 stsp 
175 8c35ff14 2020-11-19 stsp 	err = got_object_blob_dump_to_file(size, nlines, line_offsets,
176 8c35ff14 2020-11-19 stsp 	    f, blob);
177 8c35ff14 2020-11-19 stsp 	if (err)
178 8c35ff14 2020-11-19 stsp 		return err;
179 8c35ff14 2020-11-19 stsp 
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)
183 8c35ff14 2020-11-19 stsp #endif
184 8c35ff14 2020-11-19 stsp 		*p = NULL; /* fall back on file I/O */
185 8c35ff14 2020-11-19 stsp 
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;
188 b4737997 2020-11-21 stsp 
189 b4737997 2020-11-21 stsp 	rc = diff_atomize_file(diff_data, cfg, f, *p, *size, diff_flags);
190 8c35ff14 2020-11-19 stsp 	if (rc)
191 8c35ff14 2020-11-19 stsp 		return got_error_set_errno(rc, "diff_atomize_file");
192 8c35ff14 2020-11-19 stsp 
193 8c35ff14 2020-11-19 stsp 	return NULL;
194 8c35ff14 2020-11-19 stsp }
195 8c35ff14 2020-11-19 stsp 
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 392891ce 2022-04-07 stsp     got_blame_cb cb, void *arg)
200 404c43c4 2018-06-21 stsp {
201 404c43c4 2018-06-21 stsp 	const struct got_error *err = NULL;
202 a44927cc 2022-04-07 stsp 	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;
207 404c43c4 2018-06-21 stsp 
208 c27a5e66 2020-11-18 stsp 	err = got_object_open_as_commit(&commit, repo, id);
209 8d725ae1 2019-08-18 stsp 	if (err)
210 8d725ae1 2019-08-18 stsp 		return err;
211 8d725ae1 2019-08-18 stsp 
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;
216 c27a5e66 2020-11-18 stsp 	}
217 c27a5e66 2020-11-18 stsp 
218 d7b5a0e8 2022-04-20 stsp 	err = got_object_open_as_commit(&pcommit, repo, &pid->id);
219 a44927cc 2022-04-07 stsp 	if (err)
220 a44927cc 2022-04-07 stsp 		goto done;
221 a44927cc 2022-04-07 stsp 
222 a44927cc 2022-04-07 stsp 	err = got_object_id_by_path(&pblob_id, repo, pcommit, path);
223 4c9641fd 2019-08-21 stsp 	if (err) {
224 4c9641fd 2019-08-21 stsp 		if (err->code == GOT_ERR_NO_TREE_ENTRY)
225 4c9641fd 2019-08-21 stsp 			err = NULL;
226 404c43c4 2018-06-21 stsp 		goto done;
227 4c9641fd 2019-08-21 stsp 	}
228 27d434c2 2018-09-15 stsp 
229 8c35ff14 2020-11-19 stsp 	err = got_object_open_as_blob(&pblob, repo, pblob_id, 8192);
230 27d434c2 2018-09-15 stsp 	if (err)
231 27d434c2 2018-09-15 stsp 		goto done;
232 27d434c2 2018-09-15 stsp 
233 8c35ff14 2020-11-19 stsp 	blame->f1 = got_opentemp();
234 8c35ff14 2020-11-19 stsp 	if (blame->f1 == NULL) {
235 c27a5e66 2020-11-18 stsp 		err = got_error_from_errno("got_opentemp");
236 404c43c4 2018-06-21 stsp 		goto done;
237 404c43c4 2018-06-21 stsp 	}
238 8c35ff14 2020-11-19 stsp 
239 8c35ff14 2020-11-19 stsp 	err = blame_prepare_file(blame->f1, &blame->map1, &blame->size1,
240 8c35ff14 2020-11-19 stsp 	    &blame->nlines1, &blame->line_offsets1, blame->data1,
241 8c35ff14 2020-11-19 stsp 	    blame->cfg, pblob);
242 404c43c4 2018-06-21 stsp 	if (err)
243 404c43c4 2018-06-21 stsp 		goto done;
244 404c43c4 2018-06-21 stsp 
245 8c35ff14 2020-11-19 stsp 	diff_result = diff_main(blame->cfg, blame->data1, blame->data2);
246 8c35ff14 2020-11-19 stsp 	if (diff_result == NULL) {
247 8c35ff14 2020-11-19 stsp 		err = got_error_set_errno(ENOMEM, "malloc");
248 4c9641fd 2019-08-21 stsp 		goto done;
249 4c9641fd 2019-08-21 stsp 	}
250 8c35ff14 2020-11-19 stsp 	if (diff_result->rc != DIFF_RC_OK) {
251 8c35ff14 2020-11-19 stsp 		err = got_error_set_errno(diff_result->rc, "diff");
252 404c43c4 2018-06-21 stsp 		goto done;
253 c27a5e66 2020-11-18 stsp 	}
254 8c35ff14 2020-11-19 stsp 	if (diff_result->chunks.len > 0) {
255 8c35ff14 2020-11-19 stsp 		if (blame->nlines1 > 0) {
256 8c35ff14 2020-11-19 stsp 			blame->linemap1 = calloc(blame->nlines1,
257 8c35ff14 2020-11-19 stsp 			    sizeof(*blame->linemap1));
258 8c35ff14 2020-11-19 stsp 			if (blame->linemap1 == NULL) {
259 c27a5e66 2020-11-18 stsp 				err = got_error_from_errno("malloc");
260 c27a5e66 2020-11-18 stsp 				goto done;
261 c27a5e66 2020-11-18 stsp 			}
262 c27a5e66 2020-11-18 stsp 		}
263 392891ce 2022-04-07 stsp 		err = blame_changes(blame, diff_result, commit, id, cb, arg);
264 8c35ff14 2020-11-19 stsp 		if (err)
265 c27a5e66 2020-11-18 stsp 			goto done;
266 d68a0a7d 2018-07-10 stsp 	} else if (cb)
267 392891ce 2022-04-07 stsp 		err = cb(arg, blame->nlines, -1, commit, id);
268 404c43c4 2018-06-21 stsp done:
269 8c35ff14 2020-11-19 stsp 	if (diff_result)
270 8c35ff14 2020-11-19 stsp 		diff_result_free(diff_result);
271 8d725ae1 2019-08-18 stsp 	if (commit)
272 8d725ae1 2019-08-18 stsp 		got_object_commit_close(commit);
273 a44927cc 2022-04-07 stsp 	if (pcommit)
274 a44927cc 2022-04-07 stsp 		got_object_commit_close(pcommit);
275 c27a5e66 2020-11-18 stsp 	free(pblob_id);
276 c27a5e66 2020-11-18 stsp 	if (pblob)
277 c27a5e66 2020-11-18 stsp 		got_object_blob_close(pblob);
278 404c43c4 2018-06-21 stsp 	return err;
279 404c43c4 2018-06-21 stsp }
280 404c43c4 2018-06-21 stsp 
281 fb43ecf1 2019-02-11 stsp static const struct got_error *
282 404c43c4 2018-06-21 stsp blame_close(struct got_blame *blame)
283 404c43c4 2018-06-21 stsp {
284 fb43ecf1 2019-02-11 stsp 	const struct got_error *err = NULL;
285 c35a7943 2018-07-12 stsp 
286 8c35ff14 2020-11-19 stsp 	diff_data_free(blame->data1);
287 8c35ff14 2020-11-19 stsp 	free(blame->data1);
288 8c35ff14 2020-11-19 stsp 	diff_data_free(blame->data2);
289 8c35ff14 2020-11-19 stsp 	free(blame->data2);
290 8c35ff14 2020-11-19 stsp 	if (blame->map1) {
291 8c35ff14 2020-11-19 stsp 		if (munmap(blame->map1, blame->size1) == -1 && err == NULL)
292 8c35ff14 2020-11-19 stsp 			err = got_error_from_errno("munmap");
293 8c35ff14 2020-11-19 stsp 	}
294 8c35ff14 2020-11-19 stsp 	if (blame->map2) {
295 8c35ff14 2020-11-19 stsp 		if (munmap(blame->map2, blame->size2) == -1 && err == NULL)
296 8c35ff14 2020-11-19 stsp 			err = got_error_from_errno("munmap");
297 8c35ff14 2020-11-19 stsp 	}
298 56b63ca4 2021-01-22 stsp 	if (blame->f1 && fclose(blame->f1) == EOF && err == NULL)
299 638f9024 2019-05-13 stsp 		err = got_error_from_errno("fclose");
300 56b63ca4 2021-01-22 stsp 	if (blame->f2 && fclose(blame->f2) == EOF && err == NULL)
301 8c35ff14 2020-11-19 stsp 		err = got_error_from_errno("fclose");
302 404c43c4 2018-06-21 stsp 	free(blame->lines);
303 8c35ff14 2020-11-19 stsp 	free(blame->line_offsets1);
304 8c35ff14 2020-11-19 stsp 	free(blame->line_offsets2);
305 8c35ff14 2020-11-19 stsp 	free(blame->linemap1);
306 c27a5e66 2020-11-18 stsp 	free(blame->linemap2);
307 cca5682e 2020-11-18 stsp 	free(blame->cfg);
308 404c43c4 2018-06-21 stsp 	free(blame);
309 fb43ecf1 2019-02-11 stsp 	return err;
310 8c35ff14 2020-11-19 stsp }
311 8c35ff14 2020-11-19 stsp 
312 8c35ff14 2020-11-19 stsp static int
313 8c35ff14 2020-11-19 stsp atomize_file(struct diff_data *d, FILE *f, off_t filesize, int nlines,
314 8c35ff14 2020-11-19 stsp     off_t *line_offsets)
315 8c35ff14 2020-11-19 stsp {
316 8c35ff14 2020-11-19 stsp 	int i, rc = DIFF_RC_OK;
317 b4737997 2020-11-21 stsp 	int embedded_nul = 0;
318 8c35ff14 2020-11-19 stsp 
319 8c35ff14 2020-11-19 stsp 	ARRAYLIST_INIT(d->atoms, nlines);
320 8c35ff14 2020-11-19 stsp 
321 8c35ff14 2020-11-19 stsp 	for (i = 0; i < nlines; i++) {
322 8c35ff14 2020-11-19 stsp 		struct diff_atom *atom;
323 8c35ff14 2020-11-19 stsp 		off_t len, pos = line_offsets[i];
324 8c35ff14 2020-11-19 stsp 		unsigned int hash = 0;
325 8c35ff14 2020-11-19 stsp 		int j;
326 8c35ff14 2020-11-19 stsp 
327 8c35ff14 2020-11-19 stsp 		ARRAYLIST_ADD(atom, d->atoms);
328 8c35ff14 2020-11-19 stsp 		if (atom == NULL) {
329 8c35ff14 2020-11-19 stsp 			rc = errno;
330 8c35ff14 2020-11-19 stsp 			break;
331 8c35ff14 2020-11-19 stsp 		}
332 8c35ff14 2020-11-19 stsp 
333 8c35ff14 2020-11-19 stsp 		if (i < nlines - 1)
334 8c35ff14 2020-11-19 stsp 			len = line_offsets[i + 1] - pos;
335 8c35ff14 2020-11-19 stsp 		else
336 8c35ff14 2020-11-19 stsp 			len = filesize - pos;
337 8c35ff14 2020-11-19 stsp 
338 8c35ff14 2020-11-19 stsp 		if (fseeko(f, pos, SEEK_SET) == -1) {
339 8c35ff14 2020-11-19 stsp 			rc = errno;
340 8c35ff14 2020-11-19 stsp 			break;
341 8c35ff14 2020-11-19 stsp 		}
342 8c35ff14 2020-11-19 stsp 		for (j = 0; j < len; j++) {
343 8c35ff14 2020-11-19 stsp 			int c = fgetc(f);
344 8c35ff14 2020-11-19 stsp 			if (c == EOF) {
345 8c35ff14 2020-11-19 stsp 				if (feof(f))
346 8c35ff14 2020-11-19 stsp 					rc = EIO; /* unexpected EOF */
347 8c35ff14 2020-11-19 stsp 				else
348 8c35ff14 2020-11-19 stsp 					rc = errno;
349 8c35ff14 2020-11-19 stsp 				goto done;
350 8c35ff14 2020-11-19 stsp 			}
351 8c35ff14 2020-11-19 stsp 
352 8c35ff14 2020-11-19 stsp 			hash = diff_atom_hash_update(hash, (unsigned char)c);
353 b4737997 2020-11-21 stsp 
354 b4737997 2020-11-21 stsp 			if (c == '\0')
355 b4737997 2020-11-21 stsp 				embedded_nul = 1;
356 b4737997 2020-11-21 stsp 
357 8c35ff14 2020-11-19 stsp 		}
358 8c35ff14 2020-11-19 stsp 		*atom = (struct diff_atom){
359 8c35ff14 2020-11-19 stsp 			.root = d,
360 8c35ff14 2020-11-19 stsp 			.pos = pos,
361 8c35ff14 2020-11-19 stsp 			.at = NULL,	/* atom data is not memory-mapped */
362 8c35ff14 2020-11-19 stsp 			.len = len,
363 8c35ff14 2020-11-19 stsp 			.hash = hash,
364 8c35ff14 2020-11-19 stsp 		};
365 8c35ff14 2020-11-19 stsp 	}
366 b4737997 2020-11-21 stsp 
367 b4737997 2020-11-21 stsp 	/* File are considered binary if they contain embedded '\0' bytes. */
368 b4737997 2020-11-21 stsp 	if (embedded_nul)
369 b4737997 2020-11-21 stsp 		d->atomizer_flags |= DIFF_ATOMIZER_FOUND_BINARY_DATA;
370 8c35ff14 2020-11-19 stsp done:
371 8c35ff14 2020-11-19 stsp 	if (rc)
372 8c35ff14 2020-11-19 stsp 		ARRAYLIST_FREE(d->atoms);
373 8c35ff14 2020-11-19 stsp 
374 8c35ff14 2020-11-19 stsp 	return rc;
375 404c43c4 2018-06-21 stsp }
376 404c43c4 2018-06-21 stsp 
377 8c35ff14 2020-11-19 stsp static int
378 8c35ff14 2020-11-19 stsp atomize_file_mmap(struct diff_data *d, unsigned char *p,
379 8c35ff14 2020-11-19 stsp     off_t filesize, int nlines, off_t *line_offsets)
380 8c35ff14 2020-11-19 stsp {
381 8c35ff14 2020-11-19 stsp 	int i, rc = DIFF_RC_OK;
382 b4737997 2020-11-21 stsp 	int embedded_nul = 0;
383 8c35ff14 2020-11-19 stsp 
384 8c35ff14 2020-11-19 stsp 	ARRAYLIST_INIT(d->atoms, nlines);
385 8c35ff14 2020-11-19 stsp 
386 8c35ff14 2020-11-19 stsp 	for (i = 0; i < nlines; i++) {
387 8c35ff14 2020-11-19 stsp 		struct diff_atom *atom;
388 8c35ff14 2020-11-19 stsp 		off_t len, pos = line_offsets[i];
389 8c35ff14 2020-11-19 stsp 		unsigned int hash = 0;
390 8c35ff14 2020-11-19 stsp 		int j;
391 8c35ff14 2020-11-19 stsp 
392 8c35ff14 2020-11-19 stsp 		ARRAYLIST_ADD(atom, d->atoms);
393 8c35ff14 2020-11-19 stsp 		if (atom == NULL) {
394 8c35ff14 2020-11-19 stsp 			rc = errno;
395 8c35ff14 2020-11-19 stsp 			break;
396 8c35ff14 2020-11-19 stsp 		}
397 8c35ff14 2020-11-19 stsp 
398 8c35ff14 2020-11-19 stsp 		if (i < nlines - 1)
399 8c35ff14 2020-11-19 stsp 			len = line_offsets[i + 1] - pos;
400 8c35ff14 2020-11-19 stsp 		else
401 8c35ff14 2020-11-19 stsp 			len = filesize - pos;
402 8c35ff14 2020-11-19 stsp 
403 8c35ff14 2020-11-19 stsp 		for (j = 0; j < len; j++)
404 8c35ff14 2020-11-19 stsp 			hash = diff_atom_hash_update(hash, p[pos + j]);
405 b4737997 2020-11-21 stsp 
406 b4737997 2020-11-21 stsp 		if (!embedded_nul && memchr(&p[pos], '\0', len) != NULL)
407 b4737997 2020-11-21 stsp 			embedded_nul = 1;
408 8c35ff14 2020-11-19 stsp 
409 8c35ff14 2020-11-19 stsp 		*atom = (struct diff_atom){
410 8c35ff14 2020-11-19 stsp 			.root = d,
411 8c35ff14 2020-11-19 stsp 			.pos = pos,
412 8c35ff14 2020-11-19 stsp 			.at = &p[pos],
413 8c35ff14 2020-11-19 stsp 			.len = len,
414 8c35ff14 2020-11-19 stsp 			.hash = hash,
415 8c35ff14 2020-11-19 stsp 		};
416 8c35ff14 2020-11-19 stsp 	}
417 8c35ff14 2020-11-19 stsp 
418 b4737997 2020-11-21 stsp 	/* File are considered binary if they contain embedded '\0' bytes. */
419 b4737997 2020-11-21 stsp 	if (embedded_nul)
420 b4737997 2020-11-21 stsp 		d->atomizer_flags |= DIFF_ATOMIZER_FOUND_BINARY_DATA;
421 b4737997 2020-11-21 stsp 
422 8c35ff14 2020-11-19 stsp 	if (rc)
423 8c35ff14 2020-11-19 stsp 		ARRAYLIST_FREE(d->atoms);
424 8c35ff14 2020-11-19 stsp 
425 8c35ff14 2020-11-19 stsp 	return rc;
426 8c35ff14 2020-11-19 stsp }
427 8c35ff14 2020-11-19 stsp 
428 8c35ff14 2020-11-19 stsp /* Implements diff_atomize_func_t */
429 8c35ff14 2020-11-19 stsp static int
430 8c35ff14 2020-11-19 stsp blame_atomize_file(void *arg, struct diff_data *d)
431 8c35ff14 2020-11-19 stsp {
432 8c35ff14 2020-11-19 stsp 	struct got_blame *blame = arg;
433 8c35ff14 2020-11-19 stsp 
434 8c35ff14 2020-11-19 stsp 	if (d->f == blame->f1) {
435 8c35ff14 2020-11-19 stsp 		if (blame->map1)
436 8c35ff14 2020-11-19 stsp 			return atomize_file_mmap(d, blame->map1,
437 8c35ff14 2020-11-19 stsp 			    blame->size1, blame->nlines1,
438 8c35ff14 2020-11-19 stsp 			    blame->line_offsets1);
439 8c35ff14 2020-11-19 stsp 		else
440 8c35ff14 2020-11-19 stsp 			return atomize_file(d, blame->f1, blame->size1,
441 8c35ff14 2020-11-19 stsp 			    blame->nlines1, blame->line_offsets1);
442 8c35ff14 2020-11-19 stsp 	} else if (d->f == blame->f2) {
443 8c35ff14 2020-11-19 stsp 		if (d->atoms.len > 0) {
444 8c35ff14 2020-11-19 stsp 			/* Re-use data from previous commit. */
445 8c35ff14 2020-11-19 stsp 			return DIFF_RC_OK;
446 8c35ff14 2020-11-19 stsp 		}
447 8c35ff14 2020-11-19 stsp 		if (blame->map2)
448 8c35ff14 2020-11-19 stsp 			return atomize_file_mmap(d, blame->map2,
449 8c35ff14 2020-11-19 stsp 			    blame->size2, blame->nlines2,
450 8c35ff14 2020-11-19 stsp 			    blame->line_offsets2);
451 8c35ff14 2020-11-19 stsp 		else
452 8c35ff14 2020-11-19 stsp 			return atomize_file(d, blame->f2, blame->size2,
453 8c35ff14 2020-11-19 stsp 			    blame->nlines2, blame->line_offsets2);
454 8c35ff14 2020-11-19 stsp 	}
455 8c35ff14 2020-11-19 stsp 
456 8c35ff14 2020-11-19 stsp 	return DIFF_RC_OK;
457 8c35ff14 2020-11-19 stsp }
458 8c35ff14 2020-11-19 stsp 
459 404c43c4 2018-06-21 stsp static const struct got_error *
460 8c35ff14 2020-11-19 stsp close_file2_and_reuse_file1(struct got_blame *blame)
461 8c35ff14 2020-11-19 stsp {
462 8c35ff14 2020-11-19 stsp 	struct diff_data *d;
463 8c35ff14 2020-11-19 stsp 
464 8c35ff14 2020-11-19 stsp 	free(blame->line_offsets2);
465 8c35ff14 2020-11-19 stsp 	blame->line_offsets2 = blame->line_offsets1;
466 8c35ff14 2020-11-19 stsp 	blame->line_offsets1 = NULL;
467 8c35ff14 2020-11-19 stsp 
468 8c35ff14 2020-11-19 stsp 	free(blame->linemap2);
469 8c35ff14 2020-11-19 stsp 	blame->linemap2 = blame->linemap1;
470 8c35ff14 2020-11-19 stsp 	blame->linemap1 = NULL;
471 8c35ff14 2020-11-19 stsp 
472 8c35ff14 2020-11-19 stsp 	if (blame->map2) {
473 8c35ff14 2020-11-19 stsp 		if (munmap(blame->map2, blame->size2) == -1)
474 8c35ff14 2020-11-19 stsp 			return got_error_from_errno("munmap");
475 8c35ff14 2020-11-19 stsp 		blame->map2 = blame->map1;
476 5e9266f9 2020-11-28 naddy 		blame->map1 = NULL;
477 8c35ff14 2020-11-19 stsp 
478 8c35ff14 2020-11-19 stsp 	}
479 8c35ff14 2020-11-19 stsp 	blame->size2 = blame->size1;
480 8c35ff14 2020-11-19 stsp 	blame->size1 = 0;
481 8c35ff14 2020-11-19 stsp 
482 8c35ff14 2020-11-19 stsp 	if (fclose(blame->f2) == EOF)
483 8c35ff14 2020-11-19 stsp 		return got_error_from_errno("fclose");
484 8c35ff14 2020-11-19 stsp 	blame->f2 = blame->f1;
485 8c35ff14 2020-11-19 stsp 	blame->f1 = NULL;
486 8c35ff14 2020-11-19 stsp 
487 8c35ff14 2020-11-19 stsp 	blame->nlines2 = blame->nlines1;
488 8c35ff14 2020-11-19 stsp 	blame->nlines1 = 0;
489 8c35ff14 2020-11-19 stsp 
490 8c35ff14 2020-11-19 stsp 	diff_data_free(blame->data2); /* does not free pointer itself */
491 8c35ff14 2020-11-19 stsp 	memset(blame->data2, 0, sizeof(*blame->data2));
492 8c35ff14 2020-11-19 stsp 	d = blame->data2;
493 8c35ff14 2020-11-19 stsp 	blame->data2 = blame->data1;
494 8c35ff14 2020-11-19 stsp 	blame->data1 = d;
495 8c35ff14 2020-11-19 stsp 
496 8c35ff14 2020-11-19 stsp 	return NULL;
497 8c35ff14 2020-11-19 stsp }
498 8c35ff14 2020-11-19 stsp 
499 8c35ff14 2020-11-19 stsp static const struct got_error *
500 404c43c4 2018-06-21 stsp blame_open(struct got_blame **blamep, const char *path,
501 84451b3e 2018-07-10 stsp     struct got_object_id *start_commit_id, struct got_repository *repo,
502 392891ce 2022-04-07 stsp     got_blame_cb cb, void *arg, got_cancel_cb cancel_cb, void *cancel_arg)
503 404c43c4 2018-06-21 stsp {
504 404c43c4 2018-06-21 stsp 	const struct got_error *err = NULL;
505 392891ce 2022-04-07 stsp 	struct got_commit_object *start_commit = NULL, *last_commit = NULL;
506 27d434c2 2018-09-15 stsp 	struct got_object_id *obj_id = NULL;
507 404c43c4 2018-06-21 stsp 	struct got_blob_object *blob = NULL;
508 404c43c4 2018-06-21 stsp 	struct got_blame *blame = NULL;
509 c27a5e66 2020-11-18 stsp 	struct got_object_id *id = NULL;
510 c27a5e66 2020-11-18 stsp 	int lineno;
511 293f6400 2018-09-20 stsp 	struct got_commit_graph *graph = NULL;
512 404c43c4 2018-06-21 stsp 
513 404c43c4 2018-06-21 stsp 	*blamep = NULL;
514 404c43c4 2018-06-21 stsp 
515 a44927cc 2022-04-07 stsp 	err = got_object_open_as_commit(&start_commit, repo, start_commit_id);
516 404c43c4 2018-06-21 stsp 	if (err)
517 c27a5e66 2020-11-18 stsp 		goto done;
518 27d434c2 2018-09-15 stsp 
519 a44927cc 2022-04-07 stsp 	err = got_object_id_by_path(&obj_id, repo, start_commit, path);
520 a44927cc 2022-04-07 stsp 	if (err)
521 a44927cc 2022-04-07 stsp 		goto done;
522 a44927cc 2022-04-07 stsp 
523 8c35ff14 2020-11-19 stsp 	err = got_object_open_as_blob(&blob, repo, obj_id, 8192);
524 27d434c2 2018-09-15 stsp 	if (err)
525 27d434c2 2018-09-15 stsp 		goto done;
526 27d434c2 2018-09-15 stsp 
527 8c35ff14 2020-11-19 stsp 	blame = calloc(1, sizeof(*blame));
528 8c35ff14 2020-11-19 stsp 	if (blame == NULL) {
529 8c35ff14 2020-11-19 stsp 		err = got_error_from_errno("calloc");
530 404c43c4 2018-06-21 stsp 		goto done;
531 404c43c4 2018-06-21 stsp 	}
532 404c43c4 2018-06-21 stsp 
533 8c35ff14 2020-11-19 stsp 	blame->data1 = calloc(1, sizeof(*blame->data1));
534 8c35ff14 2020-11-19 stsp 	if (blame->data1 == NULL) {
535 8c35ff14 2020-11-19 stsp 		err = got_error_from_errno("calloc");
536 404c43c4 2018-06-21 stsp 		goto done;
537 8c35ff14 2020-11-19 stsp 	}
538 8c35ff14 2020-11-19 stsp 	blame->data2 = calloc(1, sizeof(*blame->data2));
539 8c35ff14 2020-11-19 stsp 	if (blame->data2 == NULL) {
540 c27a5e66 2020-11-18 stsp 		err = got_error_from_errno("calloc");
541 c27a5e66 2020-11-18 stsp 		goto done;
542 c27a5e66 2020-11-18 stsp 	}
543 404c43c4 2018-06-21 stsp 
544 8c35ff14 2020-11-19 stsp 	blame->f2 = got_opentemp();
545 8c35ff14 2020-11-19 stsp 	if (blame->f2 == NULL) {
546 638f9024 2019-05-13 stsp 		err = got_error_from_errno("got_opentemp");
547 404c43c4 2018-06-21 stsp 		goto done;
548 404c43c4 2018-06-21 stsp 	}
549 cca5682e 2020-11-18 stsp 	err = got_diff_get_config(&blame->cfg, GOT_DIFF_ALGORITHM_PATIENCE,
550 8c35ff14 2020-11-19 stsp 	    blame_atomize_file, blame);
551 cca5682e 2020-11-18 stsp 	if (err)
552 cca5682e 2020-11-18 stsp 		goto done;
553 fe621944 2020-11-10 stsp 
554 8c35ff14 2020-11-19 stsp 	err = blame_prepare_file(blame->f2, &blame->map2, &blame->size2,
555 8c35ff14 2020-11-19 stsp 	    &blame->nlines2, &blame->line_offsets2, blame->data2,
556 8c35ff14 2020-11-19 stsp 	    blame->cfg, blob);
557 8c35ff14 2020-11-19 stsp 	blame->nlines = blame->nlines2;
558 8c35ff14 2020-11-19 stsp 	if (err || blame->nlines == 0)
559 8c35ff14 2020-11-19 stsp 		goto done;
560 8c35ff14 2020-11-19 stsp 
561 8c35ff14 2020-11-19 stsp 	got_object_blob_close(blob);
562 8c35ff14 2020-11-19 stsp 	blob = NULL;
563 8c35ff14 2020-11-19 stsp 
564 b02560ec 2019-08-19 stsp 	/* Don't include \n at EOF in the blame line count. */
565 8c35ff14 2020-11-19 stsp 	if (blame->line_offsets2[blame->nlines - 1] == blame->size2)
566 b02560ec 2019-08-19 stsp 		blame->nlines--;
567 404c43c4 2018-06-21 stsp 
568 404c43c4 2018-06-21 stsp 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
569 404c43c4 2018-06-21 stsp 	if (blame->lines == NULL) {
570 638f9024 2019-05-13 stsp 		err = got_error_from_errno("calloc");
571 404c43c4 2018-06-21 stsp 		goto done;
572 404c43c4 2018-06-21 stsp 	}
573 404c43c4 2018-06-21 stsp 
574 c27a5e66 2020-11-18 stsp 	blame->linemap2 = calloc(blame->nlines2, sizeof(*blame->linemap2));
575 c27a5e66 2020-11-18 stsp 	if (blame->linemap2 == NULL) {
576 c27a5e66 2020-11-18 stsp 		err = got_error_from_errno("calloc");
577 c27a5e66 2020-11-18 stsp 		goto done;
578 c27a5e66 2020-11-18 stsp 	}
579 c27a5e66 2020-11-18 stsp 	for (lineno = 0; lineno < blame->nlines2; lineno++)
580 c27a5e66 2020-11-18 stsp 		blame->linemap2[lineno] = lineno;
581 c27a5e66 2020-11-18 stsp 
582 3d509237 2020-01-04 stsp 	err = got_commit_graph_open(&graph, path, 1);
583 404c43c4 2018-06-21 stsp 	if (err)
584 c27a5e66 2020-11-18 stsp 		goto done;
585 c27a5e66 2020-11-18 stsp 
586 6fb7cd11 2019-08-22 stsp 	err = got_commit_graph_iter_start(graph, start_commit_id, repo,
587 6fb7cd11 2019-08-22 stsp 	    cancel_cb, cancel_arg);
588 293f6400 2018-09-20 stsp 	if (err)
589 404c43c4 2018-06-21 stsp 		goto done;
590 656b1f76 2019-05-11 jcs 	for (;;) {
591 c27a5e66 2020-11-18 stsp 		struct got_object_id *next_id;
592 c27a5e66 2020-11-18 stsp 		err = got_commit_graph_iter_next(&next_id, graph, repo,
593 ee780d5c 2020-01-04 stsp 		    cancel_cb, cancel_arg);
594 404c43c4 2018-06-21 stsp 		if (err) {
595 c27a5e66 2020-11-18 stsp 			if (err->code == GOT_ERR_ITER_COMPLETED) {
596 4c9641fd 2019-08-21 stsp 				err = NULL;
597 c27a5e66 2020-11-18 stsp 				break;
598 c27a5e66 2020-11-18 stsp 			}
599 c27a5e66 2020-11-18 stsp 			goto done;
600 293f6400 2018-09-20 stsp 		}
601 c27a5e66 2020-11-18 stsp 		if (next_id) {
602 c27a5e66 2020-11-18 stsp 			id = next_id;
603 c27a5e66 2020-11-18 stsp 			err = blame_commit(blame, id, path, repo, cb, arg);
604 293f6400 2018-09-20 stsp 			if (err) {
605 293f6400 2018-09-20 stsp 				if (err->code == GOT_ERR_ITER_COMPLETED)
606 293f6400 2018-09-20 stsp 					err = NULL;
607 c27a5e66 2020-11-18 stsp 				goto done;
608 293f6400 2018-09-20 stsp 			}
609 06ca4d09 2018-11-19 stsp 			if (blame->nannotated == blame->nlines)
610 06ca4d09 2018-11-19 stsp 				break;
611 8c35ff14 2020-11-19 stsp 
612 8c35ff14 2020-11-19 stsp 			err = close_file2_and_reuse_file1(blame);
613 8c35ff14 2020-11-19 stsp 			if (err)
614 8c35ff14 2020-11-19 stsp 				goto done;
615 404c43c4 2018-06-21 stsp 		}
616 293f6400 2018-09-20 stsp 	}
617 ed77f2ae 2018-06-21 stsp 
618 06ca4d09 2018-11-19 stsp 	if (id && blame->nannotated < blame->nlines) {
619 293f6400 2018-09-20 stsp 		/* Annotate remaining non-annotated lines with last commit. */
620 392891ce 2022-04-07 stsp 		err = got_object_open_as_commit(&last_commit, repo, id);
621 392891ce 2022-04-07 stsp 		if (err)
622 392891ce 2022-04-07 stsp 			goto done;
623 c27a5e66 2020-11-18 stsp 		for (lineno = 0; lineno < blame->nlines; lineno++) {
624 392891ce 2022-04-07 stsp 			err = annotate_line(blame, lineno, last_commit, id,
625 392891ce 2022-04-07 stsp 			    cb, arg);
626 293f6400 2018-09-20 stsp 			if (err)
627 293f6400 2018-09-20 stsp 				goto done;
628 404c43c4 2018-06-21 stsp 		}
629 404c43c4 2018-06-21 stsp 	}
630 404c43c4 2018-06-21 stsp 
631 404c43c4 2018-06-21 stsp done:
632 293f6400 2018-09-20 stsp 	if (graph)
633 293f6400 2018-09-20 stsp 		got_commit_graph_close(graph);
634 27d434c2 2018-09-15 stsp 	free(obj_id);
635 404c43c4 2018-06-21 stsp 	if (blob)
636 404c43c4 2018-06-21 stsp 		got_object_blob_close(blob);
637 a44927cc 2022-04-07 stsp 	if (start_commit)
638 a44927cc 2022-04-07 stsp 		got_object_commit_close(start_commit);
639 392891ce 2022-04-07 stsp 	if (last_commit)
640 392891ce 2022-04-07 stsp 		got_object_commit_close(last_commit);
641 1828273a 2018-07-09 stsp 	if (err) {
642 1828273a 2018-07-09 stsp 		if (blame)
643 1828273a 2018-07-09 stsp 			blame_close(blame);
644 1828273a 2018-07-09 stsp 	} else
645 404c43c4 2018-06-21 stsp 		*blamep = blame;
646 404c43c4 2018-06-21 stsp 
647 404c43c4 2018-06-21 stsp 	return err;
648 404c43c4 2018-06-21 stsp }
649 84451b3e 2018-07-10 stsp 
650 84451b3e 2018-07-10 stsp const struct got_error *
651 0d8ff7d5 2019-08-14 stsp got_blame(const char *path, struct got_object_id *commit_id,
652 392891ce 2022-04-07 stsp     struct got_repository *repo, got_blame_cb cb, void *arg,
653 392891ce 2022-04-07 stsp     got_cancel_cb cancel_cb, void* cancel_arg)
654 84451b3e 2018-07-10 stsp {
655 fb43ecf1 2019-02-11 stsp 	const struct got_error *err = NULL, *close_err = NULL;
656 84451b3e 2018-07-10 stsp 	struct got_blame *blame;
657 84451b3e 2018-07-10 stsp 	char *abspath;
658 84451b3e 2018-07-10 stsp 
659 84451b3e 2018-07-10 stsp 	if (asprintf(&abspath, "%s%s", path[0] == '/' ? "" : "/", path) == -1)
660 638f9024 2019-05-13 stsp 		return got_error_from_errno2("asprintf", path);
661 84451b3e 2018-07-10 stsp 
662 6fb7cd11 2019-08-22 stsp 	err = blame_open(&blame, abspath, commit_id, repo, cb, arg,
663 6fb7cd11 2019-08-22 stsp 	    cancel_cb, cancel_arg);
664 84451b3e 2018-07-10 stsp 	free(abspath);
665 26206841 2018-07-12 stsp 	if (blame)
666 fb43ecf1 2019-02-11 stsp 		close_err = blame_close(blame);
667 fb43ecf1 2019-02-11 stsp 	return err ? err : close_err;
668 84451b3e 2018-07-10 stsp }