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[thirdparty/git.git] / builtin-mktree.c
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83f50539
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1/*
2 * GIT - the stupid content tracker
3 *
633e3556 4 * Copyright (c) Junio C Hamano, 2006, 2009
83f50539 5 */
633e3556 6#include "builtin.h"
83f50539 7#include "quote.h"
8e440259 8#include "tree.h"
1fdee85c 9#include "parse-options.h"
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10
11static struct treeent {
12 unsigned mode;
13 unsigned char sha1[20];
14 int len;
15 char name[FLEX_ARRAY];
16} **entries;
17static int alloc, used;
18
19static void append_to_tree(unsigned mode, unsigned char *sha1, char *path)
20{
21 struct treeent *ent;
22 int len = strlen(path);
23 if (strchr(path, '/'))
24 die("path %s contains slash", path);
25
26 if (alloc <= used) {
27 alloc = alloc_nr(used);
28 entries = xrealloc(entries, sizeof(*entries) * alloc);
29 }
30 ent = entries[used++] = xmalloc(sizeof(**entries) + len + 1);
31 ent->mode = mode;
32 ent->len = len;
e702496e 33 hashcpy(ent->sha1, sha1);
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34 memcpy(ent->name, path, len+1);
35}
36
37static int ent_compare(const void *a_, const void *b_)
38{
39 struct treeent *a = *(struct treeent **)a_;
40 struct treeent *b = *(struct treeent **)b_;
41 return base_name_compare(a->name, a->len, a->mode,
42 b->name, b->len, b->mode);
43}
44
45static void write_tree(unsigned char *sha1)
46{
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47 struct strbuf buf;
48 size_t size;
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49 int i;
50
51 qsort(entries, used, sizeof(*entries), ent_compare);
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52 for (size = i = 0; i < used; i++)
53 size += 32 + entries[i]->len;
83f50539 54
f1696ee3 55 strbuf_init(&buf, size);
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56 for (i = 0; i < used; i++) {
57 struct treeent *ent = entries[i];
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58 strbuf_addf(&buf, "%o %s%c", ent->mode, ent->name, '\0');
59 strbuf_add(&buf, ent->sha1, 20);
83f50539 60 }
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61
62 write_sha1_file(buf.buf, buf.len, tree_type, sha1);
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63}
64
1fdee85c 65static const char *mktree_usage[] = {
f1cf2d8b 66 "git mktree [-z] [--missing] [--batch]",
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67 NULL
68};
83f50539 69
1c64e79a 70static void mktree_line(char *buf, size_t len, int line_termination, int allow_missing)
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71{
72 char *ptr, *ntr;
73 unsigned mode;
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74 enum object_type mode_type; /* object type derived from mode */
75 enum object_type obj_type; /* object type derived from sha */
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76 char *path;
77 unsigned char sha1[20];
78
79 ptr = buf;
80 /*
81 * Read non-recursive ls-tree output format:
82 * mode SP type SP sha1 TAB name
83 */
84 mode = strtoul(ptr, &ntr, 8);
85 if (ptr == ntr || !ntr || *ntr != ' ')
86 die("input format error: %s", buf);
87 ptr = ntr + 1; /* type */
88 ntr = strchr(ptr, ' ');
89 if (!ntr || buf + len <= ntr + 40 ||
90 ntr[41] != '\t' ||
91 get_sha1_hex(ntr + 1, sha1))
92 die("input format error: %s", buf);
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93
94 /* It is perfectly normal if we do not have a commit from a submodule */
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95 if (S_ISGITLINK(mode))
96 allow_missing = 1;
97
ad87b5dd 98
fe0bb5f7 99 *ntr++ = 0; /* now at the beginning of SHA1 */
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100
101 path = ntr + 41; /* at the beginning of name */
102 if (line_termination && path[0] == '"') {
103 struct strbuf p_uq = STRBUF_INIT;
104 if (unquote_c_style(&p_uq, path, NULL))
105 die("invalid quoting");
106 path = strbuf_detach(&p_uq, NULL);
107 }
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108
109 /*
110 * Object type is redundantly derivable three ways.
111 * These should all agree.
112 */
113 mode_type = object_type(mode);
114 if (mode_type != type_from_string(ptr)) {
115 die("entry '%s' object type (%s) doesn't match mode type (%s)",
116 path, ptr, typename(mode_type));
117 }
118
119 /* Check the type of object identified by sha1 */
120 obj_type = sha1_object_info(sha1, NULL);
121 if (obj_type < 0) {
122 if (allow_missing) {
123 ; /* no problem - missing objects are presumed to be of the right type */
124 } else {
125 die("entry '%s' object %s is unavailable", path, sha1_to_hex(sha1));
126 }
127 } else {
128 if (obj_type != mode_type) {
129 /*
130 * The object exists but is of the wrong type.
131 * This is a problem regardless of allow_missing
132 * because the new tree entry will never be correct.
133 */
134 die("entry '%s' object %s is a %s but specified type was (%s)",
135 path, sha1_to_hex(sha1), typename(obj_type), typename(mode_type));
136 }
137 }
138
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139 append_to_tree(mode, sha1, path);
140}
141
633e3556 142int cmd_mktree(int ac, const char **av, const char *prefix)
83f50539 143{
f285a2d7 144 struct strbuf sb = STRBUF_INIT;
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145 unsigned char sha1[20];
146 int line_termination = '\n';
1c64e79a 147 int allow_missing = 0;
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148 int is_batch_mode = 0;
149 int got_eof = 0;
150
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151 const struct option option[] = {
152 OPT_SET_INT('z', NULL, &line_termination, "input is NUL terminated", '\0'),
1c64e79a 153 OPT_SET_INT( 0 , "missing", &allow_missing, "allow missing objects", 1),
f1cf2d8b 154 OPT_SET_INT( 0 , "batch", &is_batch_mode, "allow creation of more than one tree", 1),
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155 OPT_END()
156 };
83f50539 157
37782920 158 ac = parse_options(ac, av, prefix, option, mktree_usage, 0);
83f50539 159
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160 while (!got_eof) {
161 while (1) {
162 if (strbuf_getline(&sb, stdin, line_termination) == EOF) {
163 got_eof = 1;
164 break;
165 }
166 if (sb.buf[0] == '\0') {
167 /* empty lines denote tree boundaries in batch mode */
168 if (is_batch_mode)
169 break;
170 die("input format error: (blank line only valid in batch mode)");
171 }
172 mktree_line(sb.buf, sb.len, line_termination, allow_missing);
173 }
174 if (is_batch_mode && got_eof && used < 1) {
175 /*
176 * Execution gets here if the last tree entry is terminated with a
177 * new-line. The final new-line has been made optional to be
178 * consistent with the original non-batch behaviour of mktree.
179 */
180 ; /* skip creating an empty tree */
181 } else {
182 write_tree(sha1);
183 puts(sha1_to_hex(sha1));
184 fflush(stdout);
185 }
186 used=0; /* reset tree entry buffer for re-use in batch mode */
187 }
e6c019d0 188 strbuf_release(&sb);
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189 exit(0);
190}