Merge branch 'jk/p5302-avoid-collision-check-cost'
[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
9 static char const * const builtin_commit_graph_usage[] = {
10         N_("git commit-graph [--object-dir <objdir>]"),
11         N_("git commit-graph read [--object-dir <objdir>]"),
12         N_("git commit-graph verify [--object-dir <objdir>]"),
13         N_("git commit-graph write [--object-dir <objdir>] [--append] [--reachable|--stdin-packs|--stdin-commits]"),
14         NULL
15 };
16
17 static const char * const builtin_commit_graph_verify_usage[] = {
18         N_("git commit-graph verify [--object-dir <objdir>]"),
19         NULL
20 };
21
22 static const char * const builtin_commit_graph_read_usage[] = {
23         N_("git commit-graph read [--object-dir <objdir>]"),
24         NULL
25 };
26
27 static const char * const builtin_commit_graph_write_usage[] = {
28         N_("git commit-graph write [--object-dir <objdir>] [--append] [--reachable|--stdin-packs|--stdin-commits]"),
29         NULL
30 };
31
32 static struct opts_commit_graph {
33         const char *obj_dir;
34         int reachable;
35         int stdin_packs;
36         int stdin_commits;
37         int append;
38 } opts;
39
40
41 static int graph_verify(int argc, const char **argv)
42 {
43         struct commit_graph *graph = NULL;
44         char *graph_name;
45         int open_ok;
46         int fd;
47         struct stat st;
48
49         static struct option builtin_commit_graph_verify_options[] = {
50                 OPT_STRING(0, "object-dir", &opts.obj_dir,
51                            N_("dir"),
52                            N_("The object directory to store the graph")),
53                 OPT_END(),
54         };
55
56         argc = parse_options(argc, argv, NULL,
57                              builtin_commit_graph_verify_options,
58                              builtin_commit_graph_verify_usage, 0);
59
60         if (!opts.obj_dir)
61                 opts.obj_dir = get_object_directory();
62
63         graph_name = get_commit_graph_filename(opts.obj_dir);
64         open_ok = open_commit_graph(graph_name, &fd, &st);
65         if (!open_ok && errno == ENOENT)
66                 return 0;
67         if (!open_ok)
68                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
69         graph = load_commit_graph_one_fd_st(fd, &st);
70         FREE_AND_NULL(graph_name);
71
72         if (!graph)
73                 return 1;
74
75         UNLEAK(graph);
76         return verify_commit_graph(the_repository, graph);
77 }
78
79 static int graph_read(int argc, const char **argv)
80 {
81         struct commit_graph *graph = NULL;
82         char *graph_name;
83         int open_ok;
84         int fd;
85         struct stat st;
86
87         static struct option builtin_commit_graph_read_options[] = {
88                 OPT_STRING(0, "object-dir", &opts.obj_dir,
89                         N_("dir"),
90                         N_("The object directory to store the graph")),
91                 OPT_END(),
92         };
93
94         argc = parse_options(argc, argv, NULL,
95                              builtin_commit_graph_read_options,
96                              builtin_commit_graph_read_usage, 0);
97
98         if (!opts.obj_dir)
99                 opts.obj_dir = get_object_directory();
100
101         graph_name = get_commit_graph_filename(opts.obj_dir);
102
103         open_ok = open_commit_graph(graph_name, &fd, &st);
104         if (!open_ok)
105                 die_errno(_("Could not open commit-graph '%s'"), graph_name);
106
107         graph = load_commit_graph_one_fd_st(fd, &st);
108         if (!graph)
109                 return 1;
110
111         FREE_AND_NULL(graph_name);
112
113         printf("header: %08x %d %d %d %d\n",
114                 ntohl(*(uint32_t*)graph->data),
115                 *(unsigned char*)(graph->data + 4),
116                 *(unsigned char*)(graph->data + 5),
117                 *(unsigned char*)(graph->data + 6),
118                 *(unsigned char*)(graph->data + 7));
119         printf("num_commits: %u\n", graph->num_commits);
120         printf("chunks:");
121
122         if (graph->chunk_oid_fanout)
123                 printf(" oid_fanout");
124         if (graph->chunk_oid_lookup)
125                 printf(" oid_lookup");
126         if (graph->chunk_commit_data)
127                 printf(" commit_metadata");
128         if (graph->chunk_extra_edges)
129                 printf(" extra_edges");
130         printf("\n");
131
132         UNLEAK(graph);
133
134         return 0;
135 }
136
137 extern int read_replace_refs;
138
139 static int graph_write(int argc, const char **argv)
140 {
141         struct string_list *pack_indexes = NULL;
142         struct string_list *commit_hex = NULL;
143         struct string_list lines;
144
145         static struct option builtin_commit_graph_write_options[] = {
146                 OPT_STRING(0, "object-dir", &opts.obj_dir,
147                         N_("dir"),
148                         N_("The object directory to store the graph")),
149                 OPT_BOOL(0, "reachable", &opts.reachable,
150                         N_("start walk at all refs")),
151                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
152                         N_("scan pack-indexes listed by stdin for commits")),
153                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
154                         N_("start walk at commits listed by stdin")),
155                 OPT_BOOL(0, "append", &opts.append,
156                         N_("include all commits already in the commit-graph file")),
157                 OPT_END(),
158         };
159
160         argc = parse_options(argc, argv, NULL,
161                              builtin_commit_graph_write_options,
162                              builtin_commit_graph_write_usage, 0);
163
164         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
165                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
166         if (!opts.obj_dir)
167                 opts.obj_dir = get_object_directory();
168
169         read_replace_refs = 0;
170
171         if (opts.reachable) {
172                 write_commit_graph_reachable(opts.obj_dir, opts.append, 1);
173                 return 0;
174         }
175
176         string_list_init(&lines, 0);
177         if (opts.stdin_packs || opts.stdin_commits) {
178                 struct strbuf buf = STRBUF_INIT;
179
180                 while (strbuf_getline(&buf, stdin) != EOF)
181                         string_list_append(&lines, strbuf_detach(&buf, NULL));
182
183                 if (opts.stdin_packs)
184                         pack_indexes = &lines;
185                 if (opts.stdin_commits)
186                         commit_hex = &lines;
187
188                 UNLEAK(buf);
189         }
190
191         write_commit_graph(opts.obj_dir,
192                            pack_indexes,
193                            commit_hex,
194                            opts.append,
195                            1);
196
197         UNLEAK(lines);
198         return 0;
199 }
200
201 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
202 {
203         static struct option builtin_commit_graph_options[] = {
204                 OPT_STRING(0, "object-dir", &opts.obj_dir,
205                         N_("dir"),
206                         N_("The object directory to store the graph")),
207                 OPT_END(),
208         };
209
210         if (argc == 2 && !strcmp(argv[1], "-h"))
211                 usage_with_options(builtin_commit_graph_usage,
212                                    builtin_commit_graph_options);
213
214         git_config(git_default_config, NULL);
215         argc = parse_options(argc, argv, prefix,
216                              builtin_commit_graph_options,
217                              builtin_commit_graph_usage,
218                              PARSE_OPT_STOP_AT_NON_OPTION);
219
220         if (argc > 0) {
221                 if (!strcmp(argv[0], "read"))
222                         return graph_read(argc, argv);
223                 if (!strcmp(argv[0], "verify"))
224                         return graph_verify(argc, argv);
225                 if (!strcmp(argv[0], "write"))
226                         return graph_write(argc, argv);
227         }
228
229         usage_with_options(builtin_commit_graph_usage,
230                            builtin_commit_graph_options);
231 }