Merge branch 'dl/apply-3way-diff3'
[git] / builtin / commit-graph.c
1 #include "builtin.h"
2 #include "config.h"
3 #include "dir.h"
4 #include "lockfile.h"
5 #include "parse-options.h"
6 #include "repository.h"
7 #include "commit-graph.h"
8 #include "object-store.h"
9
10 static char const * const builtin_commit_graph_usage[] = {
11         N_("git commit-graph [--object-dir <objdir>]"),
12         N_("git commit-graph read [--object-dir <objdir>]"),
13         N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
14         N_("git commit-graph write [--object-dir <objdir>] [--append|--split] [--reachable|--stdin-packs|--stdin-commits] [--[no-]progress] <split options>"),
15         NULL
16 };
17
18 static const char * const builtin_commit_graph_verify_usage[] = {
19         N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
20         NULL
21 };
22
23 static const char * const builtin_commit_graph_read_usage[] = {
24         N_("git commit-graph read [--object-dir <objdir>]"),
25         NULL
26 };
27
28 static const char * const builtin_commit_graph_write_usage[] = {
29         N_("git commit-graph write [--object-dir <objdir>] [--append|--split] [--reachable|--stdin-packs|--stdin-commits] [--[no-]progress] <split options>"),
30         NULL
31 };
32
33 static struct opts_commit_graph {
34         const char *obj_dir;
35         int reachable;
36         int stdin_packs;
37         int stdin_commits;
38         int append;
39         int split;
40         int shallow;
41         int progress;
42 } opts;
43
44 static int graph_verify(int argc, const char **argv)
45 {
46         struct commit_graph *graph = NULL;
47         char *graph_name;
48         int open_ok;
49         int fd;
50         struct stat st;
51         int flags = 0;
52
53         static struct option builtin_commit_graph_verify_options[] = {
54                 OPT_STRING(0, "object-dir", &opts.obj_dir,
55                            N_("dir"),
56                            N_("The object directory to store the graph")),
57                 OPT_BOOL(0, "shallow", &opts.shallow,
58                          N_("if the commit-graph is split, only verify the tip file")),
59                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
60                 OPT_END(),
61         };
62
63         trace2_cmd_mode("verify");
64
65         opts.progress = isatty(2);
66         argc = parse_options(argc, argv, NULL,
67                              builtin_commit_graph_verify_options,
68                              builtin_commit_graph_verify_usage, 0);
69
70         if (!opts.obj_dir)
71                 opts.obj_dir = get_object_directory();
72         if (opts.shallow)
73                 flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
74         if (opts.progress)
75                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
76
77         graph_name = get_commit_graph_filename(opts.obj_dir);
78         open_ok = open_commit_graph(graph_name, &fd, &st);
79         if (!open_ok && errno != ENOENT)
80                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
81
82         FREE_AND_NULL(graph_name);
83
84         if (open_ok)
85                 graph = load_commit_graph_one_fd_st(fd, &st);
86          else
87                 graph = read_commit_graph_one(the_repository, opts.obj_dir);
88
89         /* Return failure if open_ok predicted success */
90         if (!graph)
91                 return !!open_ok;
92
93         UNLEAK(graph);
94         return verify_commit_graph(the_repository, graph, flags);
95 }
96
97 static int graph_read(int argc, const char **argv)
98 {
99         struct commit_graph *graph = NULL;
100         char *graph_name;
101         int open_ok;
102         int fd;
103         struct stat st;
104
105         static struct option builtin_commit_graph_read_options[] = {
106                 OPT_STRING(0, "object-dir", &opts.obj_dir,
107                         N_("dir"),
108                         N_("The object directory to store the graph")),
109                 OPT_END(),
110         };
111
112         trace2_cmd_mode("read");
113
114         argc = parse_options(argc, argv, NULL,
115                              builtin_commit_graph_read_options,
116                              builtin_commit_graph_read_usage, 0);
117
118         if (!opts.obj_dir)
119                 opts.obj_dir = get_object_directory();
120
121         graph_name = get_commit_graph_filename(opts.obj_dir);
122
123         open_ok = open_commit_graph(graph_name, &fd, &st);
124         if (!open_ok)
125                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
126
127         graph = load_commit_graph_one_fd_st(fd, &st);
128         if (!graph)
129                 return 1;
130
131         FREE_AND_NULL(graph_name);
132
133         printf("header: %08x %d %d %d %d\n",
134                 ntohl(*(uint32_t*)graph->data),
135                 *(unsigned char*)(graph->data + 4),
136                 *(unsigned char*)(graph->data + 5),
137                 *(unsigned char*)(graph->data + 6),
138                 *(unsigned char*)(graph->data + 7));
139         printf("num_commits: %u\n", graph->num_commits);
140         printf("chunks:");
141
142         if (graph->chunk_oid_fanout)
143                 printf(" oid_fanout");
144         if (graph->chunk_oid_lookup)
145                 printf(" oid_lookup");
146         if (graph->chunk_commit_data)
147                 printf(" commit_metadata");
148         if (graph->chunk_extra_edges)
149                 printf(" extra_edges");
150         printf("\n");
151
152         UNLEAK(graph);
153
154         return 0;
155 }
156
157 extern int read_replace_refs;
158 static struct split_commit_graph_opts split_opts;
159
160 static int graph_write(int argc, const char **argv)
161 {
162         struct string_list *pack_indexes = NULL;
163         struct string_list *commit_hex = NULL;
164         struct string_list lines;
165         int result = 0;
166         enum commit_graph_write_flags flags = 0;
167
168         static struct option builtin_commit_graph_write_options[] = {
169                 OPT_STRING(0, "object-dir", &opts.obj_dir,
170                         N_("dir"),
171                         N_("The object directory to store the graph")),
172                 OPT_BOOL(0, "reachable", &opts.reachable,
173                         N_("start walk at all refs")),
174                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
175                         N_("scan pack-indexes listed by stdin for commits")),
176                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
177                         N_("start walk at commits listed by stdin")),
178                 OPT_BOOL(0, "append", &opts.append,
179                         N_("include all commits already in the commit-graph file")),
180                 OPT_BOOL(0, "progress", &opts.progress, N_("force progress reporting")),
181                 OPT_BOOL(0, "split", &opts.split,
182                         N_("allow writing an incremental commit-graph file")),
183                 OPT_INTEGER(0, "max-commits", &split_opts.max_commits,
184                         N_("maximum number of commits in a non-base split commit-graph")),
185                 OPT_INTEGER(0, "size-multiple", &split_opts.size_multiple,
186                         N_("maximum ratio between two levels of a split commit-graph")),
187                 OPT_EXPIRY_DATE(0, "expire-time", &split_opts.expire_time,
188                         N_("maximum number of commits in a non-base split commit-graph")),
189                 OPT_END(),
190         };
191
192         opts.progress = isatty(2);
193         split_opts.size_multiple = 2;
194         split_opts.max_commits = 0;
195         split_opts.expire_time = 0;
196
197         trace2_cmd_mode("write");
198
199         argc = parse_options(argc, argv, NULL,
200                              builtin_commit_graph_write_options,
201                              builtin_commit_graph_write_usage, 0);
202
203         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
204                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
205         if (!opts.obj_dir)
206                 opts.obj_dir = get_object_directory();
207         if (opts.append)
208                 flags |= COMMIT_GRAPH_WRITE_APPEND;
209         if (opts.split)
210                 flags |= COMMIT_GRAPH_WRITE_SPLIT;
211         if (opts.progress)
212                 flags |= COMMIT_GRAPH_WRITE_PROGRESS;
213
214         read_replace_refs = 0;
215
216         if (opts.reachable) {
217                 if (write_commit_graph_reachable(opts.obj_dir, flags, &split_opts))
218                         return 1;
219                 return 0;
220         }
221
222         string_list_init(&lines, 0);
223         if (opts.stdin_packs || opts.stdin_commits) {
224                 struct strbuf buf = STRBUF_INIT;
225
226                 while (strbuf_getline(&buf, stdin) != EOF)
227                         string_list_append(&lines, strbuf_detach(&buf, NULL));
228
229                 if (opts.stdin_packs)
230                         pack_indexes = &lines;
231                 if (opts.stdin_commits) {
232                         commit_hex = &lines;
233                         flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS;
234                 }
235
236                 UNLEAK(buf);
237         }
238
239         if (write_commit_graph(opts.obj_dir,
240                                pack_indexes,
241                                commit_hex,
242                                flags,
243                                &split_opts))
244                 result = 1;
245
246         UNLEAK(lines);
247         return result;
248 }
249
250 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
251 {
252         static struct option builtin_commit_graph_options[] = {
253                 OPT_STRING(0, "object-dir", &opts.obj_dir,
254                         N_("dir"),
255                         N_("The object directory to store the graph")),
256                 OPT_END(),
257         };
258
259         if (argc == 2 && !strcmp(argv[1], "-h"))
260                 usage_with_options(builtin_commit_graph_usage,
261                                    builtin_commit_graph_options);
262
263         git_config(git_default_config, NULL);
264         argc = parse_options(argc, argv, prefix,
265                              builtin_commit_graph_options,
266                              builtin_commit_graph_usage,
267                              PARSE_OPT_STOP_AT_NON_OPTION);
268
269         save_commit_buffer = 0;
270
271         if (argc > 0) {
272                 if (!strcmp(argv[0], "read"))
273                         return graph_read(argc, argv);
274                 if (!strcmp(argv[0], "verify"))
275                         return graph_verify(argc, argv);
276                 if (!strcmp(argv[0], "write"))
277                         return graph_write(argc, argv);
278         }
279
280         usage_with_options(builtin_commit_graph_usage,
281                            builtin_commit_graph_options);
282 }