Merge branch 'cc/shared-index-permbits'
[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
46         static struct option builtin_commit_graph_verify_options[] = {
47                 OPT_STRING(0, "object-dir", &opts.obj_dir,
48                            N_("dir"),
49                            N_("The object directory to store the graph")),
50                 OPT_END(),
51         };
52
53         argc = parse_options(argc, argv, NULL,
54                              builtin_commit_graph_verify_options,
55                              builtin_commit_graph_verify_usage, 0);
56
57         if (!opts.obj_dir)
58                 opts.obj_dir = get_object_directory();
59
60         graph_name = get_commit_graph_filename(opts.obj_dir);
61         graph = load_commit_graph_one(graph_name);
62         FREE_AND_NULL(graph_name);
63
64         if (!graph)
65                 return 0;
66
67         UNLEAK(graph);
68         return verify_commit_graph(the_repository, graph);
69 }
70
71 static int graph_read(int argc, const char **argv)
72 {
73         struct commit_graph *graph = NULL;
74         char *graph_name;
75
76         static struct option builtin_commit_graph_read_options[] = {
77                 OPT_STRING(0, "object-dir", &opts.obj_dir,
78                         N_("dir"),
79                         N_("The object directory to store the graph")),
80                 OPT_END(),
81         };
82
83         argc = parse_options(argc, argv, NULL,
84                              builtin_commit_graph_read_options,
85                              builtin_commit_graph_read_usage, 0);
86
87         if (!opts.obj_dir)
88                 opts.obj_dir = get_object_directory();
89
90         graph_name = get_commit_graph_filename(opts.obj_dir);
91         graph = load_commit_graph_one(graph_name);
92
93         if (!graph)
94                 die("graph file %s does not exist", graph_name);
95
96         FREE_AND_NULL(graph_name);
97
98         printf("header: %08x %d %d %d %d\n",
99                 ntohl(*(uint32_t*)graph->data),
100                 *(unsigned char*)(graph->data + 4),
101                 *(unsigned char*)(graph->data + 5),
102                 *(unsigned char*)(graph->data + 6),
103                 *(unsigned char*)(graph->data + 7));
104         printf("num_commits: %u\n", graph->num_commits);
105         printf("chunks:");
106
107         if (graph->chunk_oid_fanout)
108                 printf(" oid_fanout");
109         if (graph->chunk_oid_lookup)
110                 printf(" oid_lookup");
111         if (graph->chunk_commit_data)
112                 printf(" commit_metadata");
113         if (graph->chunk_large_edges)
114                 printf(" large_edges");
115         printf("\n");
116
117         UNLEAK(graph);
118
119         return 0;
120 }
121
122 extern int read_replace_refs;
123
124 static int graph_write(int argc, const char **argv)
125 {
126         struct string_list *pack_indexes = NULL;
127         struct string_list *commit_hex = NULL;
128         struct string_list lines;
129
130         static struct option builtin_commit_graph_write_options[] = {
131                 OPT_STRING(0, "object-dir", &opts.obj_dir,
132                         N_("dir"),
133                         N_("The object directory to store the graph")),
134                 OPT_BOOL(0, "reachable", &opts.reachable,
135                         N_("start walk at all refs")),
136                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
137                         N_("scan pack-indexes listed by stdin for commits")),
138                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
139                         N_("start walk at commits listed by stdin")),
140                 OPT_BOOL(0, "append", &opts.append,
141                         N_("include all commits already in the commit-graph file")),
142                 OPT_END(),
143         };
144
145         argc = parse_options(argc, argv, NULL,
146                              builtin_commit_graph_write_options,
147                              builtin_commit_graph_write_usage, 0);
148
149         if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
150                 die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
151         if (!opts.obj_dir)
152                 opts.obj_dir = get_object_directory();
153
154         read_replace_refs = 0;
155
156         if (opts.reachable) {
157                 write_commit_graph_reachable(opts.obj_dir, opts.append, 1);
158                 return 0;
159         }
160
161         string_list_init(&lines, 0);
162         if (opts.stdin_packs || opts.stdin_commits) {
163                 struct strbuf buf = STRBUF_INIT;
164
165                 while (strbuf_getline(&buf, stdin) != EOF)
166                         string_list_append(&lines, strbuf_detach(&buf, NULL));
167
168                 if (opts.stdin_packs)
169                         pack_indexes = &lines;
170                 if (opts.stdin_commits)
171                         commit_hex = &lines;
172
173                 UNLEAK(buf);
174         }
175
176         write_commit_graph(opts.obj_dir,
177                            pack_indexes,
178                            commit_hex,
179                            opts.append,
180                            1);
181
182         UNLEAK(lines);
183         return 0;
184 }
185
186 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
187 {
188         static struct option builtin_commit_graph_options[] = {
189                 OPT_STRING(0, "object-dir", &opts.obj_dir,
190                         N_("dir"),
191                         N_("The object directory to store the graph")),
192                 OPT_END(),
193         };
194
195         if (argc == 2 && !strcmp(argv[1], "-h"))
196                 usage_with_options(builtin_commit_graph_usage,
197                                    builtin_commit_graph_options);
198
199         git_config(git_default_config, NULL);
200         argc = parse_options(argc, argv, prefix,
201                              builtin_commit_graph_options,
202                              builtin_commit_graph_usage,
203                              PARSE_OPT_STOP_AT_NON_OPTION);
204
205         if (argc > 0) {
206                 if (!strcmp(argv[0], "read"))
207                         return graph_read(argc, argv);
208                 if (!strcmp(argv[0], "verify"))
209                         return graph_verify(argc, argv);
210                 if (!strcmp(argv[0], "write"))
211                         return graph_write(argc, argv);
212         }
213
214         usage_with_options(builtin_commit_graph_usage,
215                            builtin_commit_graph_options);
216 }