aboutsummaryrefslogtreecommitdiff
path: root/submodule.c
blob: 5d286e409ee2a9b12d6b64cb05394eca18fe3e97 (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
#include "cache.h"
#include "submodule.h"
#include "dir.h"
#include "diff.h"
#include "commit.h"
#include "revision.h"
#include "run-command.h"

static int add_submodule_odb(const char *path)
{
	struct strbuf objects_directory = STRBUF_INIT;
	struct alternate_object_database *alt_odb;
	int ret = 0;

	strbuf_addf(&objects_directory, "%s/.git/objects/", path);
	if (!is_directory(objects_directory.buf)) {
		ret = -1;
		goto done;
	}
	/* avoid adding it twice */
	for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
		if (alt_odb->name - alt_odb->base == objects_directory.len &&
				!strncmp(alt_odb->base, objects_directory.buf,
					objects_directory.len))
			goto done;

	alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
	alt_odb->next = alt_odb_list;
	strcpy(alt_odb->base, objects_directory.buf);
	alt_odb->name = alt_odb->base + objects_directory.len;
	alt_odb->name[2] = '/';
	alt_odb->name[40] = '\0';
	alt_odb->name[41] = '\0';
	alt_odb_list = alt_odb;
	prepare_alt_odb();
done:
	strbuf_release(&objects_directory);
	return ret;
}

void show_submodule_summary(FILE *f, const char *path,
		unsigned char one[20], unsigned char two[20],
		unsigned dirty_submodule,
		const char *del, const char *add, const char *reset)
{
	struct rev_info rev;
	struct commit *commit, *left = left, *right = right;
	struct commit_list *merge_bases, *list;
	const char *message = NULL;
	struct strbuf sb = STRBUF_INIT;
	static const char *format = "  %m %s";
	int fast_forward = 0, fast_backward = 0;

	if (is_null_sha1(two))
		message = "(submodule deleted)";
	else if (add_submodule_odb(path))
		message = "(not checked out)";
	else if (is_null_sha1(one))
		message = "(new submodule)";
	else if (!(left = lookup_commit_reference(one)) ||
		 !(right = lookup_commit_reference(two)))
		message = "(commits not present)";

	if (!message) {
		init_revisions(&rev, NULL);
		setup_revisions(0, NULL, &rev, NULL);
		rev.left_right = 1;
		rev.first_parent_only = 1;
		left->object.flags |= SYMMETRIC_LEFT;
		add_pending_object(&rev, &left->object, path);
		add_pending_object(&rev, &right->object, path);
		merge_bases = get_merge_bases(left, right, 1);
		if (merge_bases) {
			if (merge_bases->item == left)
				fast_forward = 1;
			else if (merge_bases->item == right)
				fast_backward = 1;
		}
		for (list = merge_bases; list; list = list->next) {
			list->item->object.flags |= UNINTERESTING;
			add_pending_object(&rev, &list->item->object,
				sha1_to_hex(list->item->object.sha1));
		}
		if (prepare_revision_walk(&rev))
			message = "(revision walker failed)";
	}

	strbuf_addf(&sb, "Submodule %s %s..", path,
			find_unique_abbrev(one, DEFAULT_ABBREV));
	if (!fast_backward && !fast_forward)
		strbuf_addch(&sb, '.');
	strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
	if (dirty_submodule)
		strbuf_add(&sb, "-dirty", 6);
	if (message)
		strbuf_addf(&sb, " %s\n", message);
	else
		strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
	fwrite(sb.buf, sb.len, 1, f);

	if (!message) {
		while ((commit = get_revision(&rev))) {
			struct pretty_print_context ctx = {0};
			ctx.date_mode = rev.date_mode;
			strbuf_setlen(&sb, 0);
			if (commit->object.flags & SYMMETRIC_LEFT) {
				if (del)
					strbuf_addstr(&sb, del);
			}
			else if (add)
				strbuf_addstr(&sb, add);
			format_commit_message(commit, format, &sb, &ctx);
			if (reset)
				strbuf_addstr(&sb, reset);
			strbuf_addch(&sb, '\n');
			fprintf(f, "%s", sb.buf);
		}
		clear_commit_marks(left, ~0);
		clear_commit_marks(right, ~0);
	}
	strbuf_release(&sb);
}

int is_submodule_modified(const char *path)
{
	int len, i;
	struct child_process cp;
	const char *argv[] = {
		"status",
		"--porcelain",
		NULL,
	};
	const char *env[LOCAL_REPO_ENV_SIZE + 3];
	struct strbuf buf = STRBUF_INIT;

	for (i = 0; i < LOCAL_REPO_ENV_SIZE; i++)
		env[i] = local_repo_env[i];

	strbuf_addf(&buf, "%s/.git/", path);
	if (!is_directory(buf.buf)) {
		strbuf_release(&buf);
		/* The submodule is not checked out, so it is not modified */
		return 0;

	}
	strbuf_reset(&buf);

	strbuf_addf(&buf, "GIT_WORK_TREE=%s", path);
	env[i++] = strbuf_detach(&buf, NULL);
	strbuf_addf(&buf, "GIT_DIR=%s/.git", path);
	env[i++] = strbuf_detach(&buf, NULL);
	env[i] = NULL;

	memset(&cp, 0, sizeof(cp));
	cp.argv = argv;
	cp.env = env;
	cp.git_cmd = 1;
	cp.no_stdin = 1;
	cp.out = -1;
	if (start_command(&cp))
		die("Could not run git status --porcelain");

	len = strbuf_read(&buf, cp.out, 1024);
	close(cp.out);

	if (finish_command(&cp))
		die("git status --porcelain failed");

	for (i = LOCAL_REPO_ENV_SIZE; env[i]; i++)
		free((char *)env[i]);
	strbuf_release(&buf);
	return len != 0;
}