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
|
/*
* GIT - The information manager from hell
*
* Copyright (C) Linus Torvalds, 2005
*/
#include "cache.h"
#include <pwd.h>
#include <time.h>
#include <ctype.h>
#define BLOCKING (1ul << 14)
/*
* FIXME! Share the code with "write-tree.c"
*/
static void init_buffer(char **bufp, unsigned int *sizep)
{
char *buf = xmalloc(BLOCKING);
*sizep = 0;
*bufp = buf;
}
static void add_buffer(char **bufp, unsigned int *sizep, const char *fmt, ...)
{
char one_line[2048];
va_list args;
int len;
unsigned long alloc, size, newsize;
char *buf;
va_start(args, fmt);
len = vsnprintf(one_line, sizeof(one_line), fmt, args);
va_end(args);
size = *sizep;
newsize = size + len;
alloc = (size + 32767) & ~32767;
buf = *bufp;
if (newsize > alloc) {
alloc = (newsize + 32767) & ~32767;
buf = xrealloc(buf, alloc);
*bufp = buf;
}
*sizep = newsize;
memcpy(buf + size, one_line, len);
}
static void remove_special(char *p)
{
char c;
char *dst = p, *src = p;
for (;;) {
c = *src;
src++;
switch(c) {
case '\n': case '<': case '>':
continue;
}
*dst++ = c;
if (!c)
break;
}
/*
* Go back, and remove crud from the end: some people
* have commas etc in their gecos field
*/
dst--;
while (--dst >= p) {
unsigned char c = *dst;
switch (c) {
case ',': case ';': case '.':
*dst = 0;
continue;
}
break;
}
}
static void check_valid(unsigned char *sha1, const char *expect)
{
void *buf;
char type[20];
unsigned long size;
buf = read_sha1_file(sha1, type, &size);
if (!buf || strcmp(type, expect))
die("%s is not a valid '%s' object", sha1_to_hex(sha1), expect);
free(buf);
}
/*
* Having more than two parents is not strange at all, and this is
* how multi-way merges are represented.
*/
#define MAXPARENT (16)
static unsigned char parent_sha1[MAXPARENT][20];
static char *commit_tree_usage = "git-commit-tree <sha1> [-p <sha1>]* < changelog";
static int new_parent(int idx)
{
int i;
unsigned char *sha1 = parent_sha1[idx];
for (i = 0; i < idx; i++) {
if (!memcmp(parent_sha1[i], sha1, 20)) {
error("duplicate parent %s ignored", sha1_to_hex(sha1));
return 0;
}
}
return 1;
}
int main(int argc, char **argv)
{
int i, len;
int parents = 0;
unsigned char tree_sha1[20];
unsigned char commit_sha1[20];
char *gecos, *realgecos, *commitgecos;
char *email, *commitemail, realemail[1000];
char date[50], realdate[50];
char *audate, *cmdate;
char comment[1000];
struct passwd *pw;
char *buffer;
unsigned int size;
if (argc < 2 || get_sha1_hex(argv[1], tree_sha1) < 0)
usage(commit_tree_usage);
check_valid(tree_sha1, "tree");
for (i = 2; i < argc; i += 2) {
char *a, *b;
a = argv[i]; b = argv[i+1];
if (!b || strcmp(a, "-p") || get_sha1(b, parent_sha1[parents]))
usage(commit_tree_usage);
check_valid(parent_sha1[parents], "commit");
if (new_parent(parents))
parents++;
}
if (!parents)
fprintf(stderr, "Committing initial tree %s\n", argv[1]);
pw = getpwuid(getuid());
if (!pw)
die("You don't exist. Go away!");
realgecos = pw->pw_gecos;
len = strlen(pw->pw_name);
memcpy(realemail, pw->pw_name, len);
realemail[len] = '@';
gethostname(realemail+len+1, sizeof(realemail)-len-1);
if (!strchr(realemail+len+1, '.')) {
strcat(realemail, ".");
getdomainname(realemail+strlen(realemail), sizeof(realemail)-strlen(realemail)-1);
}
datestamp(realdate, sizeof(realdate));
strcpy(date, realdate);
commitgecos = gitenv("GIT_COMMITTER_NAME") ? : realgecos;
commitemail = gitenv("GIT_COMMITTER_EMAIL") ? : realemail;
gecos = gitenv("GIT_AUTHOR_NAME") ? : realgecos;
email = gitenv("GIT_AUTHOR_EMAIL") ? : realemail;
audate = gitenv("GIT_AUTHOR_DATE");
if (audate)
parse_date(audate, date, sizeof(date));
cmdate = gitenv("GIT_COMMITTER_DATE");
if (cmdate)
parse_date(cmdate, realdate, sizeof(realdate));
remove_special(gecos); remove_special(realgecos); remove_special(commitgecos);
remove_special(email); remove_special(realemail); remove_special(commitemail);
init_buffer(&buffer, &size);
add_buffer(&buffer, &size, "tree %s\n", sha1_to_hex(tree_sha1));
/*
* NOTE! This ordering means that the same exact tree merged with a
* different order of parents will be a _different_ changeset even
* if everything else stays the same.
*/
for (i = 0; i < parents; i++)
add_buffer(&buffer, &size, "parent %s\n", sha1_to_hex(parent_sha1[i]));
/* Person/date information */
add_buffer(&buffer, &size, "author %s <%s> %s\n", gecos, email, date);
add_buffer(&buffer, &size, "committer %s <%s> %s\n\n", commitgecos, commitemail, realdate);
/* And add the comment */
while (fgets(comment, sizeof(comment), stdin) != NULL)
add_buffer(&buffer, &size, "%s", comment);
write_sha1_file(buffer, size, "commit", commit_sha1);
printf("%s\n", sha1_to_hex(commit_sha1));
return 0;
}
|
