2 5aa81393 2020-01-06 stsp * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
4 372ccdbb 2018-06-10 stsp * Permission to use, copy, modify, and distribute this software for any
5 372ccdbb 2018-06-10 stsp * purpose with or without fee is hereby granted, provided that the above
6 372ccdbb 2018-06-10 stsp * copyright notice and this permission notice appear in all copies.
8 372ccdbb 2018-06-10 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 372ccdbb 2018-06-10 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 372ccdbb 2018-06-10 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 372ccdbb 2018-06-10 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 372ccdbb 2018-06-10 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 372ccdbb 2018-06-10 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 372ccdbb 2018-06-10 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 372ccdbb 2018-06-10 stsp #include <sys/types.h>
18 372ccdbb 2018-06-10 stsp #include <sys/stat.h>
20 56e0773d 2019-11-28 stsp #include <limits.h>
21 372ccdbb 2018-06-10 stsp #include <stdio.h>
22 372ccdbb 2018-06-10 stsp #include <stdlib.h>
23 372ccdbb 2018-06-10 stsp #include <string.h>
24 372ccdbb 2018-06-10 stsp #include <zlib.h>
25 372ccdbb 2018-06-10 stsp #include <ctype.h>
27 dd038bc6 2021-09-21 thomas.ad #include "got_compat.h"
29 372ccdbb 2018-06-10 stsp #include "got_error.h"
30 372ccdbb 2018-06-10 stsp #include "got_object.h"
31 6fb7cd11 2019-08-22 stsp #include "got_cancel.h"
32 372ccdbb 2018-06-10 stsp #include "got_commit_graph.h"
33 324d37e7 2019-05-11 stsp #include "got_path.h"
35 372ccdbb 2018-06-10 stsp #include "got_lib_delta.h"
36 63581804 2018-07-09 stsp #include "got_lib_inflate.h"
37 372ccdbb 2018-06-10 stsp #include "got_lib_object.h"
38 372ccdbb 2018-06-10 stsp #include "got_lib_object_idset.h"
40 372ccdbb 2018-06-10 stsp struct got_commit_graph_node {
41 372ccdbb 2018-06-10 stsp struct got_object_id id;
43 ca6e02ac 2020-01-07 stsp /* Used only during iteration. */
44 ca6e02ac 2020-01-07 stsp time_t timestamp;
45 372ccdbb 2018-06-10 stsp TAILQ_ENTRY(got_commit_graph_node) entry;
48 9ba79e04 2018-06-11 stsp TAILQ_HEAD(got_commit_graph_iter_list, got_commit_graph_node);
50 b565f6f8 2018-07-23 stsp struct got_commit_graph_branch_tip {
51 32777563 2018-11-07 stsp struct got_object_id *commit_id;
52 32777563 2018-11-07 stsp struct got_commit_object *commit;
53 32777563 2018-11-07 stsp struct got_commit_graph_node *new_node;
56 372ccdbb 2018-06-10 stsp struct got_commit_graph {
57 372ccdbb 2018-06-10 stsp /* The set of all commits we have traversed. */
58 372ccdbb 2018-06-10 stsp struct got_object_idset *node_ids;
61 0ed6ed4c 2018-06-13 stsp #define GOT_COMMIT_GRAPH_FIRST_PARENT_TRAVERSAL 0x01
64 372ccdbb 2018-06-10 stsp * A set of object IDs of known parent commits which we have not yet
65 372ccdbb 2018-06-10 stsp * traversed. Each commit ID in this set represents a branch in commit
66 372ccdbb 2018-06-10 stsp * history: Either the first-parent branch of the head node, or another
67 372ccdbb 2018-06-10 stsp * branch corresponding to a traversed merge commit for which we have
68 372ccdbb 2018-06-10 stsp * not traversed a branch point commit yet.
70 372ccdbb 2018-06-10 stsp * Whenever we add a commit with a matching ID to the graph, we remove
71 372ccdbb 2018-06-10 stsp * its corresponding element from this set, and add new elements for
72 372ccdbb 2018-06-10 stsp * each of that commit's parent commits which were not traversed yet.
74 372ccdbb 2018-06-10 stsp * When API users ask us to fetch more commits, we fetch commits from
75 372ccdbb 2018-06-10 stsp * all currently open branches. This allows API users to process
76 372ccdbb 2018-06-10 stsp * commits in linear order even though the history contains branches.
78 372ccdbb 2018-06-10 stsp struct got_object_idset *open_branches;
80 32777563 2018-11-07 stsp /* Array of branch tips for fetch_commits_from_open_branches(). */
81 b565f6f8 2018-07-23 stsp struct got_commit_graph_branch_tip *tips;
84 31cedeaf 2018-09-15 stsp /* Path of tree entry of interest to the API user. */
88 94489f7d 2020-01-04 stsp * Nodes which will be passed to the API user next, sorted by
89 94489f7d 2020-01-04 stsp * commit timestmap.
91 9ba79e04 2018-06-11 stsp struct got_commit_graph_iter_list iter_list;
94 31cedeaf 2018-09-15 stsp static const struct got_error *
95 41fa1437 2018-11-05 stsp detect_changed_path(int *changed, struct got_commit_object *commit,
96 31cedeaf 2018-09-15 stsp struct got_object_id *commit_id, const char *path,
97 31cedeaf 2018-09-15 stsp struct got_repository *repo)
99 31cedeaf 2018-09-15 stsp const struct got_error *err = NULL;
100 41fa1437 2018-11-05 stsp struct got_commit_object *pcommit = NULL;
101 31cedeaf 2018-09-15 stsp struct got_tree_object *tree = NULL, *ptree = NULL;
102 31cedeaf 2018-09-15 stsp struct got_object_qid *pid;
104 31cedeaf 2018-09-15 stsp if (got_path_is_root_dir(path)) {
105 31cedeaf 2018-09-15 stsp *changed = 1;
106 31cedeaf 2018-09-15 stsp return NULL;
109 31cedeaf 2018-09-15 stsp *changed = 0;
111 dbdddfee 2021-06-23 naddy pid = STAILQ_FIRST(&commit->parent_ids);
112 31cedeaf 2018-09-15 stsp if (pid == NULL) {
113 31cedeaf 2018-09-15 stsp struct got_object_id *obj_id;
114 945f9229 2022-04-16 thomas err = got_object_id_by_path(&obj_id, repo, commit, path);
116 d1451975 2018-11-11 stsp if (err->code == GOT_ERR_NO_TREE_ENTRY)
117 fd1d2703 2018-11-04 stsp err = NULL;
119 fd1d2703 2018-11-04 stsp *changed = 1; /* The path was created in this commit. */
120 31cedeaf 2018-09-15 stsp free(obj_id);
121 0e9101d5 2018-11-18 stsp return err;
124 0e9101d5 2018-11-18 stsp err = got_object_open_as_tree(&tree, repo, commit->tree_id);
126 0e9101d5 2018-11-18 stsp return err;
128 ec242592 2022-04-22 thomas err = got_object_open_as_commit(&pcommit, repo, &pid->id);
132 0e9101d5 2018-11-18 stsp err = got_object_open_as_tree(&ptree, repo, pcommit->tree_id);
136 81a966c0 2018-11-18 stsp err = got_object_tree_path_changed(changed, tree, ptree, path, repo);
139 31cedeaf 2018-09-15 stsp got_object_tree_close(tree);
141 31cedeaf 2018-09-15 stsp got_object_tree_close(ptree);
142 31cedeaf 2018-09-15 stsp if (pcommit)
143 41fa1437 2018-11-05 stsp got_object_commit_close(pcommit);
144 31cedeaf 2018-09-15 stsp return err;
147 4626e416 2018-06-10 stsp static void
148 9ba79e04 2018-06-11 stsp add_node_to_iter_list(struct got_commit_graph *graph,
149 ca6e02ac 2020-01-07 stsp struct got_commit_graph_node *node, time_t committer_time)
151 4bd3f2bb 2018-06-10 stsp struct got_commit_graph_node *n, *next;
153 ca6e02ac 2020-01-07 stsp node->timestamp = committer_time;
155 94489f7d 2020-01-04 stsp n = TAILQ_FIRST(&graph->iter_list);
156 bee6b577 2018-09-19 stsp while (n) {
157 bee6b577 2018-09-19 stsp next = TAILQ_NEXT(n, entry);
158 73026088 2018-11-18 stsp if (next && node->timestamp >= next->timestamp) {
159 bee6b577 2018-09-19 stsp TAILQ_INSERT_BEFORE(next, node, entry);
164 93e45b7c 2018-09-24 stsp TAILQ_INSERT_TAIL(&graph->iter_list, node, entry);
167 0ed6ed4c 2018-06-13 stsp static const struct got_error *
168 ca6e02ac 2020-01-07 stsp add_node(struct got_commit_graph_node **new_node,
169 ca6e02ac 2020-01-07 stsp struct got_commit_graph *graph, struct got_object_id *commit_id,
170 ca6e02ac 2020-01-07 stsp struct got_repository *repo)
172 ca6e02ac 2020-01-07 stsp const struct got_error *err = NULL;
173 ca6e02ac 2020-01-07 stsp struct got_commit_graph_node *node;
175 ca6e02ac 2020-01-07 stsp *new_node = NULL;
177 ca6e02ac 2020-01-07 stsp node = calloc(1, sizeof(*node));
178 ca6e02ac 2020-01-07 stsp if (node == NULL)
179 ca6e02ac 2020-01-07 stsp return got_error_from_errno("calloc");
181 ca6e02ac 2020-01-07 stsp memcpy(&node->id, commit_id, sizeof(node->id));
182 ca6e02ac 2020-01-07 stsp err = got_object_idset_add(graph->node_ids, &node->id, NULL);
184 ca6e02ac 2020-01-07 stsp free(node);
186 ca6e02ac 2020-01-07 stsp *new_node = node;
187 ca6e02ac 2020-01-07 stsp return err;
191 ca6e02ac 2020-01-07 stsp * Ask got-read-pack to traverse first-parent history until a commit is
192 ca6e02ac 2020-01-07 stsp * encountered which modified graph->path, or until the pack file runs
193 ca6e02ac 2020-01-07 stsp * out of relevant commits. This is faster than sending an individual
194 ca6e02ac 2020-01-07 stsp * request for each commit stored in the pack file.
196 ca6e02ac 2020-01-07 stsp static const struct got_error *
197 ca6e02ac 2020-01-07 stsp packed_first_parent_traversal(int *ncommits_traversed,
198 ca6e02ac 2020-01-07 stsp struct got_commit_graph *graph, struct got_object_id *commit_id,
199 ca6e02ac 2020-01-07 stsp struct got_repository *repo)
201 ca6e02ac 2020-01-07 stsp const struct got_error *err = NULL;
202 ca6e02ac 2020-01-07 stsp struct got_object_id_queue traversed_commits;
203 ca6e02ac 2020-01-07 stsp struct got_object_qid *qid;
205 dbdddfee 2021-06-23 naddy STAILQ_INIT(&traversed_commits);
206 ca6e02ac 2020-01-07 stsp *ncommits_traversed = 0;
208 ca6e02ac 2020-01-07 stsp err = got_traverse_packed_commits(&traversed_commits,
209 ca6e02ac 2020-01-07 stsp commit_id, graph->path, repo);
211 ca6e02ac 2020-01-07 stsp return err;
213 ca6e02ac 2020-01-07 stsp /* Add all traversed commits to the graph... */
214 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(qid, &traversed_commits, entry) {
215 ca6e02ac 2020-01-07 stsp struct got_commit_graph_node *node;
217 ec242592 2022-04-22 thomas if (got_object_idset_contains(graph->open_branches, &qid->id))
219 ec242592 2022-04-22 thomas if (got_object_idset_contains(graph->node_ids, &qid->id))
222 ca6e02ac 2020-01-07 stsp (*ncommits_traversed)++;
224 ca6e02ac 2020-01-07 stsp /* ... except the last commit is the new branch tip. */
225 dbdddfee 2021-06-23 naddy if (STAILQ_NEXT(qid, entry) == NULL) {
226 ca6e02ac 2020-01-07 stsp err = got_object_idset_add(graph->open_branches,
227 ec242592 2022-04-22 thomas &qid->id, NULL);
231 ec242592 2022-04-22 thomas err = add_node(&node, graph, &qid->id, repo);
236 ca6e02ac 2020-01-07 stsp got_object_id_queue_free(&traversed_commits);
237 ca6e02ac 2020-01-07 stsp return err;
240 ca6e02ac 2020-01-07 stsp static const struct got_error *
241 32c85d2c 2020-01-06 stsp close_branch(struct got_commit_graph *graph, struct got_object_id *commit_id)
243 32c85d2c 2020-01-06 stsp const struct got_error *err;
245 32c85d2c 2020-01-06 stsp err = got_object_idset_remove(NULL, graph->open_branches, commit_id);
246 32c85d2c 2020-01-06 stsp if (err && err->code != GOT_ERR_NO_OBJ)
247 32c85d2c 2020-01-06 stsp return err;
248 32c85d2c 2020-01-06 stsp return NULL;
251 32c85d2c 2020-01-06 stsp static const struct got_error *
252 14159a7b 2020-01-04 stsp advance_branch(struct got_commit_graph *graph, struct got_object_id *commit_id,
253 14159a7b 2020-01-04 stsp struct got_commit_object *commit, struct got_repository *repo)
255 0ed6ed4c 2018-06-13 stsp const struct got_error *err;
256 0ed6ed4c 2018-06-13 stsp struct got_object_qid *qid;
258 32c85d2c 2020-01-06 stsp err = close_branch(graph, commit_id);
260 32c85d2c 2020-01-06 stsp return err;
262 0ed6ed4c 2018-06-13 stsp if (graph->flags & GOT_COMMIT_GRAPH_FIRST_PARENT_TRAVERSAL) {
263 dbdddfee 2021-06-23 naddy qid = STAILQ_FIRST(&commit->parent_ids);
264 9b88e78c 2018-11-18 stsp if (qid == NULL ||
265 ec242592 2022-04-22 thomas got_object_idset_contains(graph->open_branches, &qid->id))
266 0ed6ed4c 2018-06-13 stsp return NULL;
268 ca6e02ac 2020-01-07 stsp * The root directory always changes by definition, and when
269 ca6e02ac 2020-01-07 stsp * logging the root we want to traverse consecutive commits
270 ca6e02ac 2020-01-07 stsp * even if they point at the same tree.
271 ca6e02ac 2020-01-07 stsp * But if we are looking for a specific path then we can avoid
272 ca6e02ac 2020-01-07 stsp * fetching packed commits which did not modify the path and
273 ca6e02ac 2020-01-07 stsp * only fetch their IDs. This speeds up 'got blame'.
275 ca6e02ac 2020-01-07 stsp if (!got_path_is_root_dir(graph->path) &&
276 ca6e02ac 2020-01-07 stsp (commit->flags & GOT_COMMIT_FLAG_PACKED)) {
277 ca6e02ac 2020-01-07 stsp int ncommits = 0;
278 ca6e02ac 2020-01-07 stsp err = packed_first_parent_traversal(&ncommits,
279 ec242592 2022-04-22 thomas graph, &qid->id, repo);
280 ca6e02ac 2020-01-07 stsp if (err || ncommits > 0)
281 ca6e02ac 2020-01-07 stsp return err;
283 9b88e78c 2018-11-18 stsp return got_object_idset_add(graph->open_branches,
284 ec242592 2022-04-22 thomas &qid->id, NULL);
288 bee6b577 2018-09-19 stsp * If we are graphing commits for a specific path, skip branches
289 bee6b577 2018-09-19 stsp * which do not contribute any content to this path.
291 7a62478b 2018-11-18 stsp if (commit->nparents > 1 && !got_path_is_root_dir(graph->path)) {
292 6dcdad08 2018-11-18 stsp struct got_object_id *merged_id, *prev_id = NULL;
293 bee6b577 2018-09-19 stsp int branches_differ = 0;
295 945f9229 2022-04-16 thomas err = got_object_id_by_path(&merged_id, repo, commit,
296 bee6b577 2018-09-19 stsp graph->path);
298 bee6b577 2018-09-19 stsp return err;
300 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(qid, &commit->parent_ids, entry) {
301 945f9229 2022-04-16 thomas struct got_object_id *id = NULL;
302 945f9229 2022-04-16 thomas struct got_commit_object *pcommit = NULL;
304 8e291695 2020-01-04 stsp if (got_object_idset_contains(graph->open_branches,
305 ec242592 2022-04-22 thomas &qid->id))
308 945f9229 2022-04-16 thomas err = got_object_open_as_commit(&pcommit, repo,
309 ec242592 2022-04-22 thomas &qid->id);
310 945f9229 2022-04-16 thomas if (err) {
311 945f9229 2022-04-16 thomas free(merged_id);
312 945f9229 2022-04-16 thomas free(prev_id);
313 945f9229 2022-04-16 thomas return err;
315 945f9229 2022-04-16 thomas err = got_object_id_by_path(&id, repo, pcommit,
316 bee6b577 2018-09-19 stsp graph->path);
317 945f9229 2022-04-16 thomas got_object_commit_close(pcommit);
318 945f9229 2022-04-16 thomas pcommit = NULL;
320 d1451975 2018-11-11 stsp if (err->code == GOT_ERR_NO_TREE_ENTRY) {
321 bee6b577 2018-09-19 stsp branches_differ = 1;
324 6dcdad08 2018-11-18 stsp free(merged_id);
325 6dcdad08 2018-11-18 stsp free(prev_id);
326 bee6b577 2018-09-19 stsp return err;
329 bee6b577 2018-09-19 stsp if (prev_id) {
330 bee6b577 2018-09-19 stsp if (!branches_differ &&
331 d2c2d781 2018-11-18 stsp got_object_id_cmp(id, prev_id) != 0)
332 bee6b577 2018-09-19 stsp branches_differ = 1;
333 6dcdad08 2018-11-18 stsp free(prev_id);
335 6dcdad08 2018-11-18 stsp prev_id = id;
338 bee6b577 2018-09-19 stsp * If a branch has created the merged content we can
339 bee6b577 2018-09-19 stsp * skip any other branches.
341 bee6b577 2018-09-19 stsp if (got_object_id_cmp(merged_id, id) == 0) {
342 b36429ab 2018-11-05 stsp err = got_object_idset_add(graph->open_branches,
343 ec242592 2022-04-22 thomas &qid->id, NULL);
344 6dcdad08 2018-11-18 stsp free(merged_id);
346 b36429ab 2018-11-05 stsp return err;
350 6dcdad08 2018-11-18 stsp free(prev_id);
351 6dcdad08 2018-11-18 stsp prev_id = NULL;
352 6dcdad08 2018-11-18 stsp free(merged_id);
353 6dcdad08 2018-11-18 stsp merged_id = NULL;
356 bee6b577 2018-09-19 stsp * If the path's content is the same on all branches,
357 bee6b577 2018-09-19 stsp * follow the first parent only.
359 bee6b577 2018-09-19 stsp if (!branches_differ) {
360 dbdddfee 2021-06-23 naddy qid = STAILQ_FIRST(&commit->parent_ids);
361 bee6b577 2018-09-19 stsp if (qid == NULL)
362 bee6b577 2018-09-19 stsp return NULL;
363 8e291695 2020-01-04 stsp if (got_object_idset_contains(graph->open_branches,
364 ec242592 2022-04-22 thomas &qid->id))
365 b36429ab 2018-11-05 stsp return NULL;
366 8e291695 2020-01-04 stsp if (got_object_idset_contains(graph->node_ids,
367 ec242592 2022-04-22 thomas &qid->id))
368 998ff57f 2018-11-18 stsp return NULL; /* parent already traversed */
369 b36429ab 2018-11-05 stsp return got_object_idset_add(graph->open_branches,
370 ec242592 2022-04-22 thomas &qid->id, NULL);
374 dbdddfee 2021-06-23 naddy STAILQ_FOREACH(qid, &commit->parent_ids, entry) {
375 ec242592 2022-04-22 thomas if (got_object_idset_contains(graph->open_branches, &qid->id))
377 ec242592 2022-04-22 thomas if (got_object_idset_contains(graph->node_ids, &qid->id))
378 998ff57f 2018-11-18 stsp continue; /* parent already traversed */
379 ec242592 2022-04-22 thomas err = got_object_idset_add(graph->open_branches, &qid->id,
382 0ed6ed4c 2018-06-13 stsp return err;
385 b43fbaa0 2018-06-11 stsp return NULL;
388 de56b2d7 2020-01-04 stsp const struct got_error *
389 c4d7a9c4 2018-06-11 stsp got_commit_graph_open(struct got_commit_graph **graph,
390 3d509237 2020-01-04 stsp const char *path, int first_parent_traversal)
392 22220781 2020-01-04 stsp const struct got_error *err = NULL;
394 3ddcebf3 2020-01-04 stsp *graph = calloc(1, sizeof(**graph));
395 3d509237 2020-01-04 stsp if (*graph == NULL)
396 3ddcebf3 2020-01-04 stsp return got_error_from_errno("calloc");
398 88cdb9c6 2020-01-04 stsp TAILQ_INIT(&(*graph)->iter_list);
400 3ddcebf3 2020-01-04 stsp (*graph)->path = strdup(path);
401 3ddcebf3 2020-01-04 stsp if ((*graph)->path == NULL) {
402 3ddcebf3 2020-01-04 stsp err = got_error_from_errno("strdup");
406 3ddcebf3 2020-01-04 stsp (*graph)->node_ids = got_object_idset_alloc();
407 3ddcebf3 2020-01-04 stsp if ((*graph)->node_ids == NULL) {
408 3ddcebf3 2020-01-04 stsp err = got_error_from_errno("got_object_idset_alloc");
412 3ddcebf3 2020-01-04 stsp (*graph)->open_branches = got_object_idset_alloc();
413 3ddcebf3 2020-01-04 stsp if ((*graph)->open_branches == NULL) {
414 3ddcebf3 2020-01-04 stsp err = got_error_from_errno("got_object_idset_alloc");
418 0ed6ed4c 2018-06-13 stsp if (first_parent_traversal)
419 0ed6ed4c 2018-06-13 stsp (*graph)->flags |= GOT_COMMIT_GRAPH_FIRST_PARENT_TRAVERSAL;
422 22220781 2020-01-04 stsp got_commit_graph_close(*graph);
423 22220781 2020-01-04 stsp *graph = NULL;
425 22220781 2020-01-04 stsp return err;
428 32777563 2018-11-07 stsp struct add_branch_tip_arg {
429 b565f6f8 2018-07-23 stsp struct got_commit_graph_branch_tip *tips;
431 32777563 2018-11-07 stsp struct got_repository *repo;
432 32777563 2018-11-07 stsp struct got_commit_graph *graph;
435 cb103d04 2018-11-07 stsp static const struct got_error *
436 32777563 2018-11-07 stsp add_branch_tip(struct got_object_id *commit_id, void *data, void *arg)
438 32777563 2018-11-07 stsp const struct got_error *err;
439 32777563 2018-11-07 stsp struct add_branch_tip_arg *a = arg;
440 32777563 2018-11-07 stsp struct got_commit_graph_node *new_node;
441 32777563 2018-11-07 stsp struct got_commit_object *commit;
443 32777563 2018-11-07 stsp err = got_object_open_as_commit(&commit, a->repo, commit_id);
445 32777563 2018-11-07 stsp return err;
447 ca6e02ac 2020-01-07 stsp err = add_node(&new_node, a->graph, commit_id, a->repo);
449 32777563 2018-11-07 stsp return err;
451 32777563 2018-11-07 stsp a->tips[a->ntips].commit_id = new_node ? &new_node->id : NULL;
452 32777563 2018-11-07 stsp a->tips[a->ntips].commit = commit;
453 32777563 2018-11-07 stsp a->tips[a->ntips].new_node = new_node;
454 b565f6f8 2018-07-23 stsp a->ntips++;
456 cb103d04 2018-11-07 stsp return NULL;
459 1142eae9 2018-06-11 stsp static const struct got_error *
460 57eecd46 2020-01-04 stsp fetch_commits_from_open_branches(struct got_commit_graph *graph,
461 6fb7cd11 2019-08-22 stsp struct got_repository *repo, got_cancel_cb cancel_cb, void *cancel_arg)
463 372ccdbb 2018-06-10 stsp const struct got_error *err;
464 32777563 2018-11-07 stsp struct add_branch_tip_arg arg;
465 32777563 2018-11-07 stsp int i, ntips;
467 32777563 2018-11-07 stsp ntips = got_object_idset_num_elements(graph->open_branches);
468 32777563 2018-11-07 stsp if (ntips == 0)
469 372ccdbb 2018-06-10 stsp return NULL;
471 32777563 2018-11-07 stsp /* (Re-)allocate branch tips array if necessary. */
472 32777563 2018-11-07 stsp if (graph->ntips < ntips) {
473 b565f6f8 2018-07-23 stsp struct got_commit_graph_branch_tip *tips;
474 5e50c36a 2018-11-08 stsp tips = recallocarray(graph->tips, graph->ntips, ntips,
475 5e50c36a 2018-11-08 stsp sizeof(*tips));
476 b565f6f8 2018-07-23 stsp if (tips == NULL)
477 638f9024 2019-05-13 stsp return got_error_from_errno("recallocarray");
478 b565f6f8 2018-07-23 stsp graph->tips = tips;
479 32777563 2018-11-07 stsp graph->ntips = ntips;
481 b565f6f8 2018-07-23 stsp arg.tips = graph->tips;
482 32777563 2018-11-07 stsp arg.ntips = 0; /* add_branch_tip() will increment */
483 32777563 2018-11-07 stsp arg.repo = repo;
484 32777563 2018-11-07 stsp arg.graph = graph;
485 32777563 2018-11-07 stsp err = got_object_idset_for_each(graph->open_branches, add_branch_tip,
490 b565f6f8 2018-07-23 stsp for (i = 0; i < arg.ntips; i++) {
491 372ccdbb 2018-06-10 stsp struct got_object_id *commit_id;
492 41fa1437 2018-11-05 stsp struct got_commit_object *commit;
493 32777563 2018-11-07 stsp struct got_commit_graph_node *new_node;
494 13a851c1 2020-01-04 stsp int changed;
496 6fb7cd11 2019-08-22 stsp if (cancel_cb) {
497 6fb7cd11 2019-08-22 stsp err = (*cancel_cb)(cancel_arg);
502 32777563 2018-11-07 stsp commit_id = arg.tips[i].commit_id;
503 32777563 2018-11-07 stsp commit = arg.tips[i].commit;
504 32777563 2018-11-07 stsp new_node = arg.tips[i].new_node;
506 13a851c1 2020-01-04 stsp err = detect_changed_path(&changed, commit, commit_id,
507 13a851c1 2020-01-04 stsp graph->path, repo);
509 13a851c1 2020-01-04 stsp if (err->code != GOT_ERR_NO_OBJ)
512 13a851c1 2020-01-04 stsp * History of the path stops here on the current
513 13a851c1 2020-01-04 stsp * branch. Keep going on other branches.
515 32c85d2c 2020-01-06 stsp err = close_branch(graph, commit_id);
520 57eecd46 2020-01-04 stsp if (changed)
521 ca6e02ac 2020-01-07 stsp add_node_to_iter_list(graph, new_node,
522 ca6e02ac 2020-01-07 stsp got_object_commit_get_committer_time(commit));
523 14159a7b 2020-01-04 stsp err = advance_branch(graph, commit_id, commit, repo);
528 246e1c78 2018-11-08 stsp for (i = 0; i < arg.ntips; i++)
529 32777563 2018-11-07 stsp got_object_commit_close(arg.tips[i].commit);
530 372ccdbb 2018-06-10 stsp return err;
534 372ccdbb 2018-06-10 stsp got_commit_graph_close(struct got_commit_graph *graph)
536 22220781 2020-01-04 stsp if (graph->open_branches)
537 22220781 2020-01-04 stsp got_object_idset_free(graph->open_branches);
538 22220781 2020-01-04 stsp if (graph->node_ids)
539 22220781 2020-01-04 stsp got_object_idset_free(graph->node_ids);
540 b565f6f8 2018-07-23 stsp free(graph->tips);
541 31cedeaf 2018-09-15 stsp free(graph->path);
542 372ccdbb 2018-06-10 stsp free(graph);
545 372ccdbb 2018-06-10 stsp const struct got_error *
546 372ccdbb 2018-06-10 stsp got_commit_graph_iter_start(struct got_commit_graph *graph,
547 6fb7cd11 2019-08-22 stsp struct got_object_id *id, struct got_repository *repo,
548 6fb7cd11 2019-08-22 stsp got_cancel_cb cancel_cb, void *cancel_arg)
550 31cedeaf 2018-09-15 stsp const struct got_error *err = NULL;
552 3d509237 2020-01-04 stsp if (!TAILQ_EMPTY(&graph->iter_list))
553 3d509237 2020-01-04 stsp return got_error(GOT_ERR_ITER_BUSY);
555 3ff3126d 2020-01-04 stsp err = got_object_idset_add(graph->open_branches, id, NULL);
557 7e33c8c5 2020-01-04 stsp return err;
559 3ff3126d 2020-01-04 stsp /* Locate first commit which changed graph->path. */
560 94489f7d 2020-01-04 stsp while (TAILQ_EMPTY(&graph->iter_list) &&
561 3ff3126d 2020-01-04 stsp got_object_idset_num_elements(graph->open_branches) > 0) {
562 3ff3126d 2020-01-04 stsp err = fetch_commits_from_open_branches(graph, repo,
563 3ff3126d 2020-01-04 stsp cancel_cb, cancel_arg);
565 7e33c8c5 2020-01-04 stsp return err;
568 94489f7d 2020-01-04 stsp if (TAILQ_EMPTY(&graph->iter_list)) {
569 5175b31a 2020-01-04 stsp const char *path;
570 5175b31a 2020-01-04 stsp if (got_path_is_root_dir(graph->path))
571 5175b31a 2020-01-04 stsp return got_error_no_obj(id);
572 5175b31a 2020-01-04 stsp path = graph->path;
573 5175b31a 2020-01-04 stsp while (path[0] == '/')
575 5175b31a 2020-01-04 stsp return got_error_path(path, GOT_ERR_NO_TREE_ENTRY);
578 7e33c8c5 2020-01-04 stsp return NULL;
581 372ccdbb 2018-06-10 stsp const struct got_error *
582 b43fbaa0 2018-06-11 stsp got_commit_graph_iter_next(struct got_object_id **id,
583 ee780d5c 2020-01-04 stsp struct got_commit_graph *graph, struct got_repository *repo,
584 ee780d5c 2020-01-04 stsp got_cancel_cb cancel_cb, void *cancel_arg)
586 ee780d5c 2020-01-04 stsp const struct got_error *err = NULL;
587 94489f7d 2020-01-04 stsp struct got_commit_graph_node *node;
589 9ba79e04 2018-06-11 stsp *id = NULL;
591 df8cd9c6 2020-01-05 stsp node = TAILQ_FIRST(&graph->iter_list);
592 df8cd9c6 2020-01-05 stsp if (node == NULL) {
593 2c7f8870 2018-09-19 stsp /* We are done iterating, or iteration was not started. */
594 9ba79e04 2018-06-11 stsp return got_error(GOT_ERR_ITER_COMPLETED);
597 94489f7d 2020-01-04 stsp while (TAILQ_NEXT(node, entry) == NULL &&
598 ee780d5c 2020-01-04 stsp got_object_idset_num_elements(graph->open_branches) > 0) {
599 57eecd46 2020-01-04 stsp err = fetch_commits_from_open_branches(graph, repo,
600 57eecd46 2020-01-04 stsp cancel_cb, cancel_arg);
602 ee780d5c 2020-01-04 stsp return err;
605 94489f7d 2020-01-04 stsp *id = &node->id;
606 94489f7d 2020-01-04 stsp TAILQ_REMOVE(&graph->iter_list, node, entry);
607 372ccdbb 2018-06-10 stsp return NULL;
610 a9833bc9 2019-05-13 stsp const struct got_error *
611 a9833bc9 2019-05-13 stsp got_commit_graph_find_youngest_common_ancestor(struct got_object_id **yca_id,
612 a9833bc9 2019-05-13 stsp struct got_object_id *commit_id, struct got_object_id *commit_id2,
613 768705e3 2021-09-27 thomas int first_parent_traversal,
614 6fb7cd11 2019-08-22 stsp struct got_repository *repo, got_cancel_cb cancel_cb, void *cancel_arg)
616 a9833bc9 2019-05-13 stsp const struct got_error *err = NULL;
617 a9833bc9 2019-05-13 stsp struct got_commit_graph *graph = NULL, *graph2 = NULL;
618 a9833bc9 2019-05-13 stsp int completed = 0, completed2 = 0;
619 a9833bc9 2019-05-13 stsp struct got_object_idset *commit_ids;
621 a9833bc9 2019-05-13 stsp *yca_id = NULL;
623 a9833bc9 2019-05-13 stsp commit_ids = got_object_idset_alloc();
624 a9833bc9 2019-05-13 stsp if (commit_ids == NULL)
625 638f9024 2019-05-13 stsp return got_error_from_errno("got_object_idset_alloc");
627 768705e3 2021-09-27 thomas err = got_commit_graph_open(&graph, "/", first_parent_traversal);
631 768705e3 2021-09-27 thomas err = got_commit_graph_open(&graph2, "/", first_parent_traversal);
635 6fb7cd11 2019-08-22 stsp err = got_commit_graph_iter_start(graph, commit_id, repo,
636 6fb7cd11 2019-08-22 stsp cancel_cb, cancel_arg);
640 6fb7cd11 2019-08-22 stsp err = got_commit_graph_iter_start(graph2, commit_id2, repo,
641 6fb7cd11 2019-08-22 stsp cancel_cb, cancel_arg);
646 ee780d5c 2020-01-04 stsp struct got_object_id *id = NULL, *id2 = NULL;
648 6fb7cd11 2019-08-22 stsp if (cancel_cb) {
649 6fb7cd11 2019-08-22 stsp err = (*cancel_cb)(cancel_arg);
654 a9833bc9 2019-05-13 stsp if (!completed) {
655 ee780d5c 2020-01-04 stsp err = got_commit_graph_iter_next(&id, graph, repo,
656 ee780d5c 2020-01-04 stsp cancel_cb, cancel_arg);
658 ee780d5c 2020-01-04 stsp if (err->code != GOT_ERR_ITER_COMPLETED)
660 ee780d5c 2020-01-04 stsp err = NULL;
661 ee780d5c 2020-01-04 stsp completed = 1;
665 a9833bc9 2019-05-13 stsp if (!completed2) {
666 ee780d5c 2020-01-04 stsp err = got_commit_graph_iter_next(&id2, graph2, repo,
667 ee780d5c 2020-01-04 stsp cancel_cb, cancel_arg);
669 ee780d5c 2020-01-04 stsp if (err->code != GOT_ERR_ITER_COMPLETED)
671 ee780d5c 2020-01-04 stsp err = NULL;
672 ee780d5c 2020-01-04 stsp completed2 = 1;
677 8e291695 2020-01-04 stsp if (got_object_idset_contains(commit_ids, id)) {
678 a9833bc9 2019-05-13 stsp *yca_id = got_object_id_dup(id);
679 a9833bc9 2019-05-13 stsp if (*yca_id)
681 82751bc5 2019-05-13 stsp err = got_error_from_errno("got_object_id_dup");
685 8e291695 2020-01-04 stsp err = got_object_idset_add(commit_ids, id, NULL);
690 8e291695 2020-01-04 stsp if (got_object_idset_contains(commit_ids, id2)) {
691 a9833bc9 2019-05-13 stsp *yca_id = got_object_id_dup(id2);
692 a9833bc9 2019-05-13 stsp if (*yca_id)
694 82751bc5 2019-05-13 stsp err = got_error_from_errno("got_object_id_dup");
698 8e291695 2020-01-04 stsp err = got_object_idset_add(commit_ids, id2, NULL);
703 a9833bc9 2019-05-13 stsp if (completed && completed2) {
704 a9833bc9 2019-05-13 stsp err = got_error(GOT_ERR_ANCESTRY);
710 a9833bc9 2019-05-13 stsp got_object_idset_free(commit_ids);
712 a9833bc9 2019-05-13 stsp got_commit_graph_close(graph);
713 a9833bc9 2019-05-13 stsp if (graph2)
714 a9833bc9 2019-05-13 stsp got_commit_graph_close(graph2);
715 a9833bc9 2019-05-13 stsp return err;
