Remove references to git-fetch-pack from "git clone" documentation.
[git/git.git] / archive.c
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1#include "cache.h"
2#include "commit.h"
3#include "attr.h"
562e25ab 4#include "archive.h"
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5
6static void format_subst(const struct commit *commit,
7 const char *src, size_t len,
8 struct strbuf *buf)
9{
10 char *to_free = NULL;
11 struct strbuf fmt;
12
13 if (src == buf->buf)
14 to_free = strbuf_detach(buf, NULL);
15 strbuf_init(&fmt, 0);
16 for (;;) {
17 const char *b, *c;
18
19 b = memmem(src, len, "$Format:", 8);
75b7dfbd 20 if (!b)
18125644 21 break;
75b7dfbd 22 c = memchr(b + 8, '$', (src + len) - b - 8);
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23 if (!c)
24 break;
25
26 strbuf_reset(&fmt);
27 strbuf_add(&fmt, b + 8, c - b - 8);
28
29 strbuf_add(buf, src, b - src);
30 format_commit_message(commit, fmt.buf, buf);
31 len -= c + 1 - src;
32 src = c + 1;
33 }
34 strbuf_add(buf, src, len);
35 strbuf_release(&fmt);
36 free(to_free);
37}
38
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39static void *sha1_file_to_archive(const char *path, const unsigned char *sha1,
40 unsigned int mode, enum object_type *type,
41 unsigned long *sizep, const struct commit *commit)
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42{
43 void *buffer;
44
45 buffer = read_sha1_file(sha1, type, sizep);
46 if (buffer && S_ISREG(mode)) {
47 struct strbuf buf;
48 size_t size = 0;
49
50 strbuf_init(&buf, 0);
51 strbuf_attach(&buf, buffer, *sizep, *sizep + 1);
52 convert_to_working_tree(path, buf.buf, buf.len, &buf);
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53 if (commit)
54 format_subst(commit, buf.buf, buf.len, &buf);
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55 buffer = strbuf_detach(&buf, &size);
56 *sizep = size;
57 }
58
59 return buffer;
60}
61
1d11d5bb 62static void setup_archive_check(struct git_attr_check *check)
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63{
64 static struct git_attr *attr_export_ignore;
1d11d5bb 65 static struct git_attr *attr_export_subst;
008d896d 66
1d11d5bb 67 if (!attr_export_ignore) {
008d896d 68 attr_export_ignore = git_attr("export-ignore", 13);
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69 attr_export_subst = git_attr("export-subst", 12);
70 }
008d896d 71 check[0].attr = attr_export_ignore;
1d11d5bb 72 check[1].attr = attr_export_subst;
008d896d 73}
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74
75struct archiver_context {
76 struct archiver_args *args;
77 write_archive_entry_fn_t write_entry;
78};
79
80static int write_archive_entry(const unsigned char *sha1, const char *base,
81 int baselen, const char *filename, unsigned mode, int stage,
82 void *context)
83{
84 static struct strbuf path = STRBUF_INIT;
85 struct archiver_context *c = context;
86 struct archiver_args *args = c->args;
87 write_archive_entry_fn_t write_entry = c->write_entry;
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88 struct git_attr_check check[2];
89 const char *path_without_prefix;
90 int convert = 0;
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91 int err;
92 enum object_type type;
93 unsigned long size;
94 void *buffer;
95
96 strbuf_reset(&path);
97 strbuf_grow(&path, PATH_MAX);
98 strbuf_add(&path, base, baselen);
99 strbuf_addstr(&path, filename);
1d11d5bb 100 path_without_prefix = path.buf + args->baselen;
562e25ab 101
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102 setup_archive_check(check);
103 if (!git_checkattr(path_without_prefix, ARRAY_SIZE(check), check)) {
104 if (ATTR_TRUE(check[0].value))
105 return 0;
106 convert = ATTR_TRUE(check[1].value);
107 }
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108
109 if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
110 strbuf_addch(&path, '/');
111 if (args->verbose)
112 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
113 err = write_entry(args, sha1, path.buf, path.len, mode, NULL, 0);
114 if (err)
115 return err;
116 return READ_TREE_RECURSIVE;
117 }
118
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119 buffer = sha1_file_to_archive(path_without_prefix, sha1, mode,
120 &type, &size, convert ? args->commit : NULL);
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121 if (!buffer)
122 return error("cannot read %s", sha1_to_hex(sha1));
123 if (args->verbose)
124 fprintf(stderr, "%.*s\n", (int)path.len, path.buf);
125 err = write_entry(args, sha1, path.buf, path.len, mode, buffer, size);
126 free(buffer);
127 return err;
128}
129
130int write_archive_entries(struct archiver_args *args,
131 write_archive_entry_fn_t write_entry)
132{
133 struct archiver_context context;
134 int err;
135
136 if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
137 size_t len = args->baselen;
138
139 while (len > 1 && args->base[len - 2] == '/')
140 len--;
141 if (args->verbose)
142 fprintf(stderr, "%.*s\n", (int)len, args->base);
143 err = write_entry(args, args->tree->object.sha1, args->base,
144 len, 040777, NULL, 0);
145 if (err)
146 return err;
147 }
148
149 context.args = args;
150 context.write_entry = write_entry;
151
152 err = read_tree_recursive(args->tree, args->base, args->baselen, 0,
153 args->pathspec, write_archive_entry, &context);
154 if (err == READ_TREE_RECURSIVE)
155 err = 0;
156 return err;
157}