Merge branch 'jc/t3404-one-shot-export-fix'
[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 "commit-graph.h"
7
8 static char const * const builtin_commit_graph_usage[] = {
9         N_("git commit-graph [--object-dir <objdir>]"),
10         N_("git commit-graph read [--object-dir <objdir>]"),
11         N_("git commit-graph write [--object-dir <objdir>] [--append] [--stdin-packs|--stdin-commits]"),
12         NULL
13 };
14
15 static const char * const builtin_commit_graph_read_usage[] = {
16         N_("git commit-graph read [--object-dir <objdir>]"),
17         NULL
18 };
19
20 static const char * const builtin_commit_graph_write_usage[] = {
21         N_("git commit-graph write [--object-dir <objdir>] [--append] [--stdin-packs|--stdin-commits]"),
22         NULL
23 };
24
25 static struct opts_commit_graph {
26         const char *obj_dir;
27         int stdin_packs;
28         int stdin_commits;
29         int append;
30 } opts;
31
32 static int graph_read(int argc, const char **argv)
33 {
34         struct commit_graph *graph = NULL;
35         char *graph_name;
36
37         static struct option builtin_commit_graph_read_options[] = {
38                 OPT_STRING(0, "object-dir", &opts.obj_dir,
39                         N_("dir"),
40                         N_("The object directory to store the graph")),
41                 OPT_END(),
42         };
43
44         argc = parse_options(argc, argv, NULL,
45                              builtin_commit_graph_read_options,
46                              builtin_commit_graph_read_usage, 0);
47
48         if (!opts.obj_dir)
49                 opts.obj_dir = get_object_directory();
50
51         graph_name = get_commit_graph_filename(opts.obj_dir);
52         graph = load_commit_graph_one(graph_name);
53
54         if (!graph)
55                 die("graph file %s does not exist", graph_name);
56         FREE_AND_NULL(graph_name);
57
58         printf("header: %08x %d %d %d %d\n",
59                 ntohl(*(uint32_t*)graph->data),
60                 *(unsigned char*)(graph->data + 4),
61                 *(unsigned char*)(graph->data + 5),
62                 *(unsigned char*)(graph->data + 6),
63                 *(unsigned char*)(graph->data + 7));
64         printf("num_commits: %u\n", graph->num_commits);
65         printf("chunks:");
66
67         if (graph->chunk_oid_fanout)
68                 printf(" oid_fanout");
69         if (graph->chunk_oid_lookup)
70                 printf(" oid_lookup");
71         if (graph->chunk_commit_data)
72                 printf(" commit_metadata");
73         if (graph->chunk_large_edges)
74                 printf(" large_edges");
75         printf("\n");
76
77         return 0;
78 }
79
80 static int graph_write(int argc, const char **argv)
81 {
82         const char **pack_indexes = NULL;
83         int packs_nr = 0;
84         const char **commit_hex = NULL;
85         int commits_nr = 0;
86         const char **lines = NULL;
87         int lines_nr = 0;
88         int lines_alloc = 0;
89
90         static struct option builtin_commit_graph_write_options[] = {
91                 OPT_STRING(0, "object-dir", &opts.obj_dir,
92                         N_("dir"),
93                         N_("The object directory to store the graph")),
94                 OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
95                         N_("scan pack-indexes listed by stdin for commits")),
96                 OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
97                         N_("start walk at commits listed by stdin")),
98                 OPT_BOOL(0, "append", &opts.append,
99                         N_("include all commits already in the commit-graph file")),
100                 OPT_END(),
101         };
102
103         argc = parse_options(argc, argv, NULL,
104                              builtin_commit_graph_write_options,
105                              builtin_commit_graph_write_usage, 0);
106
107         if (opts.stdin_packs && opts.stdin_commits)
108                 die(_("cannot use both --stdin-commits and --stdin-packs"));
109         if (!opts.obj_dir)
110                 opts.obj_dir = get_object_directory();
111
112         if (opts.stdin_packs || opts.stdin_commits) {
113                 struct strbuf buf = STRBUF_INIT;
114                 lines_nr = 0;
115                 lines_alloc = 128;
116                 ALLOC_ARRAY(lines, lines_alloc);
117
118                 while (strbuf_getline(&buf, stdin) != EOF) {
119                         ALLOC_GROW(lines, lines_nr + 1, lines_alloc);
120                         lines[lines_nr++] = strbuf_detach(&buf, NULL);
121                 }
122
123                 if (opts.stdin_packs) {
124                         pack_indexes = lines;
125                         packs_nr = lines_nr;
126                 }
127                 if (opts.stdin_commits) {
128                         commit_hex = lines;
129                         commits_nr = lines_nr;
130                 }
131         }
132
133         write_commit_graph(opts.obj_dir,
134                            pack_indexes,
135                            packs_nr,
136                            commit_hex,
137                            commits_nr,
138                            opts.append);
139
140         return 0;
141 }
142
143 int cmd_commit_graph(int argc, const char **argv, const char *prefix)
144 {
145         static struct option builtin_commit_graph_options[] = {
146                 OPT_STRING(0, "object-dir", &opts.obj_dir,
147                         N_("dir"),
148                         N_("The object directory to store the graph")),
149                 OPT_END(),
150         };
151
152         if (argc == 2 && !strcmp(argv[1], "-h"))
153                 usage_with_options(builtin_commit_graph_usage,
154                                    builtin_commit_graph_options);
155
156         git_config(git_default_config, NULL);
157         argc = parse_options(argc, argv, prefix,
158                              builtin_commit_graph_options,
159                              builtin_commit_graph_usage,
160                              PARSE_OPT_STOP_AT_NON_OPTION);
161
162         if (argc > 0) {
163                 if (!strcmp(argv[0], "read"))
164                         return graph_read(argc, argv);
165                 if (!strcmp(argv[0], "write"))
166                         return graph_write(argc, argv);
167         }
168
169         usage_with_options(builtin_commit_graph_usage,
170                            builtin_commit_graph_options);
171 }