2 * GIT - The information manager from hell
4 * Copyright (C) Linus Torvalds, 2005
8 #ifndef DEFAULT_GIT_TEMPLATE_DIR
9 #define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates/"
12 static void safe_create_dir(const char *dir)
14 if (mkdir(dir, 0777) < 0) {
15 if (errno != EEXIST) {
22 static int copy_file(const char *dst, const char *src, int mode)
26 mode = (mode & 0111) ? 0777 : 0666;
27 if ((fdi = open(src, O_RDONLY)) < 0)
29 if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
33 status = copy_fd(fdi, fdo);
38 static void copy_templates_1(char *path, int baselen,
39 char *template, int template_baselen,
44 /* Note: if ".git/hooks" file exists in the repository being
45 * re-initialized, /etc/core-git/templates/hooks/update would
46 * cause git-init-db to fail here. I think this is sane but
47 * it means that the set of templates we ship by default, along
48 * with the way the namespace under .git/ is organized, should
49 * be really carefully chosen.
51 safe_create_dir(path);
52 while ((de = readdir(dir)) != NULL) {
53 struct stat st_git, st_template;
57 if (de->d_name[0] == '.')
59 namelen = strlen(de->d_name);
60 if ((PATH_MAX <= baselen + namelen) ||
61 (PATH_MAX <= template_baselen + namelen))
62 die("insanely long template name %s", de->d_name);
63 memcpy(path + baselen, de->d_name, namelen+1);
64 memcpy(template + template_baselen, de->d_name, namelen+1);
65 if (lstat(path, &st_git)) {
67 die("cannot stat %s", path);
72 if (lstat(template, &st_template))
73 die("cannot stat template %s", template);
75 if (S_ISDIR(st_template.st_mode)) {
76 DIR *subdir = opendir(template);
77 int baselen_sub = baselen + namelen;
78 int template_baselen_sub = template_baselen + namelen;
80 die("cannot opendir %s", template);
82 template[template_baselen_sub++] = '/';
84 template[template_baselen_sub] = 0;
85 copy_templates_1(path, baselen_sub,
86 template, template_baselen_sub,
92 else if (S_ISLNK(st_template.st_mode)) {
95 len = readlink(template, lnk, sizeof(lnk));
97 die("cannot readlink %s", template);
98 if (sizeof(lnk) <= len)
99 die("insanely long symlink %s", template);
101 if (symlink(lnk, path))
102 die("cannot symlink %s %s", lnk, path);
104 else if (S_ISREG(st_template.st_mode)) {
105 if (copy_file(path, template, st_template.st_mode))
106 die("cannot copy %s to %s", template, path);
109 error("ignoring template %s", template);
113 static void copy_templates(const char *git_dir, int len, char *template_dir)
116 char template_path[PATH_MAX];
121 template_dir = DEFAULT_GIT_TEMPLATE_DIR;
122 strcpy(template_path, template_dir);
123 template_len = strlen(template_path);
124 if (template_path[template_len-1] != '/') {
125 template_path[template_len++] = '/';
126 template_path[template_len] = 0;
128 dir = opendir(template_path);
130 fprintf(stderr, "warning: templates not found %s\n",
135 memcpy(path, git_dir, len);
137 copy_templates_1(path, len,
138 template_path, template_len,
143 static void create_default_files(const char *git_dir,
146 unsigned len = strlen(git_dir);
147 static char path[PATH_MAX];
148 unsigned char sha1[20];
150 if (len > sizeof(path)-50)
151 die("insane git directory %s", git_dir);
152 memcpy(path, git_dir, len);
154 if (len && path[len-1] != '/')
158 * Create .git/refs/{heads,tags}
160 strcpy(path + len, "refs");
161 safe_create_dir(path);
162 strcpy(path + len, "refs/heads");
163 safe_create_dir(path);
164 strcpy(path + len, "refs/tags");
165 safe_create_dir(path);
168 * Create the default symlink from ".git/HEAD" to the "master"
169 * branch, if it does not exist yet.
171 strcpy(path + len, "HEAD");
172 if (read_ref(path, sha1) < 0) {
173 if (create_symref(path, "refs/heads/master") < 0)
177 copy_templates(path, len, template_path);
180 * Find out if we can trust the executable bit.
182 safe_create_dir(path);
183 strcpy(path + len, "config");
184 if (access(path, R_OK) < 0) {
185 static const char contents[] =
187 "# This is the config file\n"
192 " ; Don't trust file modes\n"
193 " filemode = false\n"
195 FILE *config = fopen(path, "w");
199 die("Can not write to %s?", path);
201 fwrite(contents, sizeof(contents)-1, 1, config);
205 if (!lstat(path, &st)) {
207 if (!chmod(path, st.st_mode ^ S_IXUSR) &&
208 !lstat(path, &st2) &&
209 st.st_mode != st2.st_mode)
212 fprintf(stderr, "Ignoring file modes\n");
217 static const char init_db_usage[] =
218 "git-init-db [--template=<template-directory>]";
221 * If you want to, you can share the DB area with any number of branches.
222 * That has advantages: you can save space by sharing all the SHA1 objects.
223 * On the other hand, it might just make lookup slower and messier. You
224 * be the judge. The default case is to have one DB per managed directory.
226 int main(int argc, char **argv)
229 const char *sha1_dir;
230 char *path, *template_dir = NULL;
233 for (i = 1; i < argc; i++, argv++) {
237 else if (!strncmp(arg, "--template=", 11))
238 template_dir = arg+11;
244 * Set up the default .git directory contents
246 git_dir = getenv(GIT_DIR_ENVIRONMENT);
248 git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
249 fprintf(stderr, "defaulting to local storage area\n");
251 safe_create_dir(git_dir);
252 create_default_files(git_dir, template_dir);
255 * And set up the object store.
257 sha1_dir = get_object_directory();
258 len = strlen(sha1_dir);
259 path = xmalloc(len + 40);
260 memcpy(path, sha1_dir, len);
262 safe_create_dir(sha1_dir);
263 strcpy(path+len, "/pack");
264 safe_create_dir(path);
265 strcpy(path+len, "/info");
266 safe_create_dir(path);