summaryrefslogtreecommitdiff
path: root/reflog-walk.c
blob: ee1456b45a2e1bfe08564400c12015889e57cf12 (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
#include "cache.h"
#include "commit.h"
#include "refs.h"
#include "diff.h"
#include "revision.h"
#include "path-list.h"
#include "reflog-walk.h"
 
struct complete_reflogs {
	char *ref;
	struct reflog_info {
		unsigned char osha1[20], nsha1[20];
		char *email;
		unsigned long timestamp;
		int tz;
		char *message;
	} *items;
	int nr, alloc;
};
 
static int read_one_reflog(unsigned char *osha1, unsigned char *nsha1,
		const char *email, unsigned long timestamp, int tz,
		const char *message, void *cb_data)
{
	struct complete_reflogs *array = cb_data;
	struct reflog_info *item;
 
	if (array->nr >= array->alloc) {
		array->alloc = alloc_nr(array->nr + 1);
		array->items = xrealloc(array->items, array->alloc *
			sizeof(struct reflog_info));
	}
	item = array->items + array->nr;
	memcpy(item->osha1, osha1, 20);
	memcpy(item->nsha1, nsha1, 20);
	item->email = xstrdup(email);
	item->timestamp = timestamp;
	item->tz = tz;
	item->message = xstrdup(message);
	array->nr++;
	return 0;
}
 
static struct complete_reflogs *read_complete_reflog(const char *ref)
{
	struct complete_reflogs *reflogs =
		xcalloc(sizeof(struct complete_reflogs), 1);
	reflogs->ref = xstrdup(ref);
	for_each_reflog_ent(ref, read_one_reflog, reflogs);
	if (reflogs->nr == 0) {
		unsigned char sha1[20];
		const char *name = resolve_ref(ref, sha1, 1, NULL);
		if (name)
			for_each_reflog_ent(name, read_one_reflog, reflogs);
	}
	if (reflogs->nr == 0) {
		int len = strlen(ref);
		char *refname = xmalloc(len + 12);
		sprintf(refname, "refs/%s", ref);
		for_each_reflog_ent(refname, read_one_reflog, reflogs);
		if (reflogs->nr == 0) {
			sprintf(refname, "refs/heads/%s", ref);
			for_each_reflog_ent(refname, read_one_reflog, reflogs);
		}
		free(refname);
	}
	return reflogs;
}
 
static int get_reflog_recno_by_time(struct complete_reflogs *array,
	unsigned long timestamp)
{
	int i;
	for (i = array->nr - 1; i >= 0; i--)
		if (timestamp >= array->items[i].timestamp)
			return i;
	return -1;
}
 
struct commit_info_lifo {
	struct commit_info {
		struct commit *commit;
		void *util;
	} *items;
	int nr, alloc;
};
 
static struct commit_info *get_commit_info(struct commit *commit,
		struct commit_info_lifo *lifo, int pop)
{
	int i;
	for (i = 0; i < lifo->nr; i++)
		if (lifo->items[i].commit == commit) {
			struct commit_info *result = &lifo->items[i];
			if (pop) {
				if (i + 1 < lifo->nr)
					memmove(lifo->items + i,
						lifo->items + i + 1,
						(lifo->nr - i) *
						sizeof(struct commit_info));
				lifo->nr--;
			}
			return result;
		}
	return NULL;
}
 
static void add_commit_info(struct commit *commit, void *util,
		struct commit_info_lifo *lifo)
{
	struct commit_info *info;
	if (lifo->nr >= lifo->alloc) {
		lifo->alloc = alloc_nr(lifo->nr + 1);
		lifo->items = xrealloc(lifo->items,
			lifo->alloc * sizeof(struct commit_info));
	}
	info = lifo->items + lifo->nr;
	info->commit = commit;
	info->util = util;
	lifo->nr++;
}
 
struct commit_reflog {
	int flag, recno;
	struct complete_reflogs *reflogs;
};
 
struct reflog_walk_info {
	struct commit_info_lifo reflogs;
	struct path_list complete_reflogs;
	struct commit_reflog *last_commit_reflog;
};
 
void init_reflog_walk(struct reflog_walk_info** info)
{
	*info = xcalloc(sizeof(struct reflog_walk_info), 1);
}
 
int add_reflog_for_walk(struct reflog_walk_info *info,
		struct commit *commit, const char *name)
{
	unsigned long timestamp = 0;
	int recno = -1;
	struct path_list_item *item;
	struct complete_reflogs *reflogs;
	char *branch, *at = strchr(name, '@');
	struct commit_reflog *commit_reflog;
 
	if (commit->object.flags & UNINTERESTING)
		die ("Cannot walk reflogs for %s", name);
 
	branch = xstrdup(name);
	if (at && at[1] == '{') {
		char *ep;
		branch[at - name] = '\0';
		recno = strtoul(at + 2, &ep, 10);
		if (*ep != '}') {
			recno = -1;
			timestamp = approxidate(at + 2);
		}
	} else
		recno = 0;
 
	item = path_list_lookup(branch, &info->complete_reflogs);
	if (item)
		reflogs = item->util;
	else {
		if (*branch == '\0') {
			unsigned char sha1[20];
			const char *head = resolve_ref("HEAD", sha1, 0, NULL);
			if (!head)
				die ("No current branch");
			free(branch);
			branch = xstrdup(head);
		}
		reflogs = read_complete_reflog(branch);
		if (!reflogs || reflogs->nr == 0) {
			unsigned char sha1[20];
			char *b;
			if (dwim_log(branch, strlen(branch), sha1, &b) == 1) {
				if (reflogs) {
					free(reflogs->ref);
					free(reflogs);
				}
				free(branch);
				branch = b;
				reflogs = read_complete_reflog(branch);
			}
		}
		if (!reflogs || reflogs->nr == 0)
			return -1;
		path_list_insert(branch, &info->complete_reflogs)->util
			= reflogs;
	}
 
	commit_reflog = xcalloc(sizeof(struct commit_reflog), 1);
	if (recno < 0) {
		commit_reflog->flag = 1;
		commit_reflog->recno = get_reflog_recno_by_time(reflogs, timestamp);
		if (commit_reflog->recno < 0) {
			free(branch);
			free(commit_reflog);
			return -1;
		}
	} else
		commit_reflog->recno = reflogs->nr - recno - 1;
	commit_reflog->reflogs = reflogs;
 
	add_commit_info(commit, commit_reflog, &info->reflogs);
	return 0;
}
 
void fake_reflog_parent(struct reflog_walk_info *info, struct commit *commit)
{
	struct commit_info *commit_info =
		get_commit_info(commit, &info->reflogs, 0);
	struct commit_reflog *commit_reflog;
	struct reflog_info *reflog;
 
	info->last_commit_reflog = NULL;
	if (!commit_info)
		return;
 
	commit_reflog = commit_info->util;
	if (commit_reflog->recno < 0) {
		commit->parents = NULL;
		return;
	}
 
	reflog = &commit_reflog->reflogs->items[commit_reflog->recno];
	info->last_commit_reflog = commit_reflog;
	commit_reflog->recno--;
	commit_info->commit = (struct commit *)parse_object(reflog->osha1);
	if (!commit_info->commit) {
		commit->parents = NULL;
		return;
	}
 
	commit->parents = xcalloc(sizeof(struct commit_list), 1);
	commit->parents->item = commit_info->commit;
	commit->object.flags &= ~(ADDED | SEEN | SHOWN);
}
 
void show_reflog_message(struct reflog_walk_info* info, int oneline,
	int relative_date)
{
	if (info && info->last_commit_reflog) {
		struct commit_reflog *commit_reflog = info->last_commit_reflog;
		struct reflog_info *info;
 
		info = &commit_reflog->reflogs->items[commit_reflog->recno+1];
		if (oneline) {
			printf("%s@{", commit_reflog->reflogs->ref);
			if (commit_reflog->flag || relative_date)
				printf("%s", show_date(info->timestamp, 0, 1));
			else
				printf("%d", commit_reflog->reflogs->nr
				       - 2 - commit_reflog->recno);
			printf("}: %s", info->message);
		}
		else {
			printf("Reflog: %s@{", commit_reflog->reflogs->ref);
			if (commit_reflog->flag || relative_date)
				printf("%s", show_date(info->timestamp,
							info->tz,
							relative_date));
			else
				printf("%d", commit_reflog->reflogs->nr
				       - 2 - commit_reflog->recno);
			printf("} (%s)\nReflog message: %s",
			       info->email, info->message);
		}
	}
}