summaryrefslogtreecommitdiff
path: root/builtin/commit-graph.c
blob: 0386f5c7755901aeb33ca41ade143a98d8a78ec7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
#include "builtin.h"
#include "config.h"
#include "dir.h"
#include "lockfile.h"
#include "parse-options.h"
#include "repository.h"
#include "commit-graph.h"
#include "object-store.h"
#include "progress.h"
#include "tag.h"
 
#define BUILTIN_COMMIT_GRAPH_VERIFY_USAGE \
	N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]")
 
#define BUILTIN_COMMIT_GRAPH_WRITE_USAGE \
	N_("git commit-graph write [--object-dir <objdir>] [--append] " \
	   "[--split[=<strategy>]] [--reachable|--stdin-packs|--stdin-commits] " \
	   "[--changed-paths] [--[no-]max-new-filters <n>] [--[no-]progress] " \
	   "<split options>")
 
static const char * builtin_commit_graph_verify_usage[] = {
	BUILTIN_COMMIT_GRAPH_VERIFY_USAGE,
	NULL
};
 
static const char * builtin_commit_graph_write_usage[] = {
	BUILTIN_COMMIT_GRAPH_WRITE_USAGE,
	NULL
};
 
static char const * const builtin_commit_graph_usage[] = {
	BUILTIN_COMMIT_GRAPH_VERIFY_USAGE,
	BUILTIN_COMMIT_GRAPH_WRITE_USAGE,
	NULL,
};
 
static struct opts_commit_graph {
	const char *obj_dir;
	int reachable;
	int stdin_packs;
	int stdin_commits;
	int append;
	int split;
	int shallow;
	int progress;
	int enable_changed_paths;
} opts;
 
static struct option common_opts[] = {
	OPT_STRING(0, "object-dir", &opts.obj_dir,
		   N_("dir"),
		   N_("the object directory to store the graph")),
	OPT_BOOL(0, "progress", &opts.progress,
		 N_("force progress reporting")),
	OPT_END()
};
 
static struct option *add_common_options(struct option *to)
{
	return parse_options_concat(common_opts, to);
}
 
static int graph_verify(int argc, const char **argv)
{
	struct commit_graph *graph = NULL;
	struct object_directory *odb = NULL;
	char *graph_name;
	int open_ok;
	int fd;
	struct stat st;
	int flags = 0;
 
	static struct option builtin_commit_graph_verify_options[] = {
		OPT_BOOL(0, "shallow", &opts.shallow,
			 N_("if the commit-graph is split, only verify the tip file")),
		OPT_END(),
	};
	struct option *options = add_common_options(builtin_commit_graph_verify_options);
 
	trace2_cmd_mode("verify");
 
	opts.progress = isatty(2);
	argc = parse_options(argc, argv, NULL,
			     options,
			     builtin_commit_graph_verify_usage, 0);
	if (argc)
		usage_with_options(builtin_commit_graph_verify_usage, options);
 
	if (!opts.obj_dir)
		opts.obj_dir = get_object_directory();
	if (opts.shallow)
		flags |= COMMIT_GRAPH_VERIFY_SHALLOW;
	if (opts.progress)
		flags |= COMMIT_GRAPH_WRITE_PROGRESS;
 
	odb = find_odb(the_repository, opts.obj_dir);
	graph_name = get_commit_graph_filename(odb);
	open_ok = open_commit_graph(graph_name, &fd, &st);
	if (!open_ok && errno != ENOENT)
		die_errno(_("Could not open commit-graph '%s'"), graph_name);
 
	FREE_AND_NULL(graph_name);
	FREE_AND_NULL(options);
 
	if (open_ok)
		graph = load_commit_graph_one_fd_st(the_repository, fd, &st, odb);
	else
		graph = read_commit_graph_one(the_repository, odb);
 
	/* Return failure if open_ok predicted success */
	if (!graph)
		return !!open_ok;
 
	UNLEAK(graph);
	return verify_commit_graph(the_repository, graph, flags);
}
 
extern int read_replace_refs;
static struct commit_graph_opts write_opts;
 
static int write_option_parse_split(const struct option *opt, const char *arg,
				    int unset)
{
	enum commit_graph_split_flags *flags = opt->value;
 
	BUG_ON_OPT_NEG(unset);
 
	opts.split = 1;
	if (!arg)
		return 0;
 
	if (!strcmp(arg, "no-merge"))
		*flags = COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED;
	else if (!strcmp(arg, "replace"))
		*flags = COMMIT_GRAPH_SPLIT_REPLACE;
	else
		die(_("unrecognized --split argument, %s"), arg);
 
	return 0;
}
 
static int read_one_commit(struct oidset *commits, struct progress *progress,
			   const char *hash)
{
	struct object *result;
	struct object_id oid;
	const char *end;
 
	if (parse_oid_hex(hash, &oid, &end))
		return error(_("unexpected non-hex object ID: %s"), hash);
 
	result = deref_tag(the_repository, parse_object(the_repository, &oid),
			   NULL, 0);
	if (!result)
		return error(_("invalid object: %s"), hash);
	else if (object_as_type(result, OBJ_COMMIT, 1))
		oidset_insert(commits, &result->oid);
 
	display_progress(progress, oidset_size(commits));
 
	return 0;
}
 
static int write_option_max_new_filters(const struct option *opt,
					const char *arg,
					int unset)
{
	int *to = opt->value;
	if (unset)
		*to = -1;
	else {
		const char *s;
		*to = strtol(arg, (char **)&s, 10);
		if (*s)
			return error(_("%s expects a numerical value"),
				     optname(opt, opt->flags));
	}
	return 0;
}
 
static int git_commit_graph_write_config(const char *var, const char *value,
					 void *cb)
{
	if (!strcmp(var, "commitgraph.maxnewfilters"))
		write_opts.max_new_filters = git_config_int(var, value);
	/*
	 * No need to fall-back to 'git_default_config', since this was already
	 * called in 'cmd_commit_graph()'.
	 */
	return 0;
}
 
static int graph_write(int argc, const char **argv)
{
	struct string_list pack_indexes = STRING_LIST_INIT_NODUP;
	struct strbuf buf = STRBUF_INIT;
	struct oidset commits = OIDSET_INIT;
	struct object_directory *odb = NULL;
	int result = 0;
	enum commit_graph_write_flags flags = 0;
	struct progress *progress = NULL;
 
	static struct option builtin_commit_graph_write_options[] = {
		OPT_BOOL(0, "reachable", &opts.reachable,
			N_("start walk at all refs")),
		OPT_BOOL(0, "stdin-packs", &opts.stdin_packs,
			N_("scan pack-indexes listed by stdin for commits")),
		OPT_BOOL(0, "stdin-commits", &opts.stdin_commits,
			N_("start walk at commits listed by stdin")),
		OPT_BOOL(0, "append", &opts.append,
			N_("include all commits already in the commit-graph file")),
		OPT_BOOL(0, "changed-paths", &opts.enable_changed_paths,
			N_("enable computation for changed paths")),
		OPT_CALLBACK_F(0, "split", &write_opts.split_flags, NULL,
			N_("allow writing an incremental commit-graph file"),
			PARSE_OPT_OPTARG | PARSE_OPT_NONEG,
			write_option_parse_split),
		OPT_INTEGER(0, "max-commits", &write_opts.max_commits,
			N_("maximum number of commits in a non-base split commit-graph")),
		OPT_INTEGER(0, "size-multiple", &write_opts.size_multiple,
			N_("maximum ratio between two levels of a split commit-graph")),
		OPT_EXPIRY_DATE(0, "expire-time", &write_opts.expire_time,
			N_("only expire files older than a given date-time")),
		OPT_CALLBACK_F(0, "max-new-filters", &write_opts.max_new_filters,
			NULL, N_("maximum number of changed-path Bloom filters to compute"),
			0, write_option_max_new_filters),
		OPT_END(),
	};
	struct option *options = add_common_options(builtin_commit_graph_write_options);
 
	opts.progress = isatty(2);
	opts.enable_changed_paths = -1;
	write_opts.size_multiple = 2;
	write_opts.max_commits = 0;
	write_opts.expire_time = 0;
	write_opts.max_new_filters = -1;
 
	trace2_cmd_mode("write");
 
	git_config(git_commit_graph_write_config, &opts);
 
	argc = parse_options(argc, argv, NULL,
			     options,
			     builtin_commit_graph_write_usage, 0);
	if (argc)
		usage_with_options(builtin_commit_graph_write_usage, options);
 
	if (opts.reachable + opts.stdin_packs + opts.stdin_commits > 1)
		die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
	if (!opts.obj_dir)
		opts.obj_dir = get_object_directory();
	if (opts.append)
		flags |= COMMIT_GRAPH_WRITE_APPEND;
	if (opts.split)
		flags |= COMMIT_GRAPH_WRITE_SPLIT;
	if (opts.progress)
		flags |= COMMIT_GRAPH_WRITE_PROGRESS;
	if (!opts.enable_changed_paths)
		flags |= COMMIT_GRAPH_NO_WRITE_BLOOM_FILTERS;
	if (opts.enable_changed_paths == 1 ||
	    git_env_bool(GIT_TEST_COMMIT_GRAPH_CHANGED_PATHS, 0))
		flags |= COMMIT_GRAPH_WRITE_BLOOM_FILTERS;
 
	read_replace_refs = 0;
	odb = find_odb(the_repository, opts.obj_dir);
 
	if (opts.reachable) {
		if (write_commit_graph_reachable(odb, flags, &write_opts))
			return 1;
		return 0;
	}
 
	if (opts.stdin_packs) {
		while (strbuf_getline(&buf, stdin) != EOF)
			string_list_append(&pack_indexes,
					   strbuf_detach(&buf, NULL));
	} else if (opts.stdin_commits) {
		oidset_init(&commits, 0);
		if (opts.progress)
			progress = start_delayed_progress(
				_("Collecting commits from input"), 0);
 
		while (strbuf_getline(&buf, stdin) != EOF) {
			if (read_one_commit(&commits, progress, buf.buf)) {
				result = 1;
				goto cleanup;
			}
		}
 
		stop_progress(&progress);
	}
 
	if (write_commit_graph(odb,
			       opts.stdin_packs ? &pack_indexes : NULL,
			       opts.stdin_commits ? &commits : NULL,
			       flags,
			       &write_opts))
		result = 1;
 
cleanup:
	FREE_AND_NULL(options);
	string_list_clear(&pack_indexes, 0);
	strbuf_release(&buf);
	return result;
}
 
int cmd_commit_graph(int argc, const char **argv, const char *prefix)
{
	struct option *builtin_commit_graph_options = common_opts;
 
	git_config(git_default_config, NULL);
	argc = parse_options(argc, argv, prefix,
			     builtin_commit_graph_options,
			     builtin_commit_graph_usage,
			     PARSE_OPT_STOP_AT_NON_OPTION);
	if (!argc)
		goto usage;
 
	save_commit_buffer = 0;
 
	if (!strcmp(argv[0], "verify"))
		return graph_verify(argc, argv);
	else if (argc && !strcmp(argv[0], "write"))
		return graph_write(argc, argv);
 
	error(_("unrecognized subcommand: %s"), argv[0]);
usage:
	usage_with_options(builtin_commit_graph_usage,
			   builtin_commit_graph_options);
}