+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
#include "cache.h"
-int main(int argc, char **argv)
+#ifndef DEFAULT_GIT_TEMPLATE_DIR
+#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates/"
+#endif
+
+static void safe_create_dir(const char *dir)
+{
+ if (mkdir(dir, 0777) < 0) {
+ if (errno != EEXIST) {
+ perror(dir);
+ exit(1);
+ }
+ }
+}
+
+static int copy_file(const char *dst, const char *src, int mode)
{
- char *sha1_dir = getenv(DB_ENVIRONMENT), *path;
- int len, i, fd;
+ int fdi, fdo;
- if (mkdir(".dircache", 0700) < 0) {
- perror("unable to create .dircache");
- exit(1);
+ mode = (mode & 0111) ? 0777 : 0666;
+ if ((fdi = open(src, O_RDONLY)) < 0)
+ return fdi;
+ if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) {
+ close(fdi);
+ return fdo;
+ }
+ while (1) {
+ char buf[BUFSIZ];
+ ssize_t leni, leno, ofs;
+ leni = read(fdi, buf, sizeof(buf));
+ if (leni < 0) {
+ error_return:
+ close(fdo);
+ close(fdi);
+ return -1;
+ }
+ if (!leni)
+ break;
+ ofs = 0;
+ do {
+ leno = write(fdo, buf+ofs, leni);
+ if (leno < 0)
+ goto error_return;
+ leni -= leno;
+ ofs += leno;
+ } while (0 < leni);
}
+ close(fdo);
+ close(fdi);
+ return 0;
+}
- /*
- * If you want to, you can share the DB area with any number of branches.
- * That has advantages: you can save space by sharing all the SHA1 objects.
- * On the other hand, it might just make lookup slower and messier. You
- * be the judge.
+static void copy_templates_1(char *path, int baselen,
+ char *template, int template_baselen,
+ DIR *dir)
+{
+ struct dirent *de;
+
+ /* Note: if ".git/hooks" file exists in the repository being
+ * re-initialized, /etc/core-git/templates/hooks/update would
+ * cause git-init-db to fail here. I think this is sane but
+ * it means that the set of templates we ship by default, along
+ * with the way the namespace under .git/ is organized, should
+ * be really carefully chosen.
*/
- sha1_dir = getenv(DB_ENVIRONMENT);
- if (sha1_dir) {
- struct stat st;
- if (!stat(sha1_dir, &st) < 0 && S_ISDIR(st.st_mode))
- return;
- fprintf(stderr, "DB_ENVIRONMENT set to bad directory %s: ", sha1_dir);
+ safe_create_dir(path);
+ while ((de = readdir(dir)) != NULL) {
+ struct stat st_git, st_template;
+ int namelen;
+ int exists = 0;
+
+ if (de->d_name[0] == '.')
+ continue;
+ namelen = strlen(de->d_name);
+ if ((PATH_MAX <= baselen + namelen) ||
+ (PATH_MAX <= template_baselen + namelen))
+ die("insanely long template name %s", de->d_name);
+ memcpy(path + baselen, de->d_name, namelen+1);
+ memcpy(template + template_baselen, de->d_name, namelen+1);
+ if (lstat(path, &st_git)) {
+ if (errno != ENOENT)
+ die("cannot stat %s", path);
+ }
+ else
+ exists = 1;
+
+ if (lstat(template, &st_template))
+ die("cannot stat template %s", template);
+
+ if (S_ISDIR(st_template.st_mode)) {
+ DIR *subdir = opendir(template);
+ int baselen_sub = baselen + namelen;
+ int template_baselen_sub = template_baselen + namelen;
+ if (!subdir)
+ die("cannot opendir %s", template);
+ path[baselen_sub++] =
+ template[template_baselen_sub++] = '/';
+ path[baselen_sub] =
+ template[template_baselen_sub] = 0;
+ copy_templates_1(path, baselen_sub,
+ template, template_baselen_sub,
+ subdir);
+ closedir(subdir);
+ }
+ else if (exists)
+ continue;
+ else if (S_ISLNK(st_template.st_mode)) {
+ char lnk[256];
+ int len;
+ len = readlink(template, lnk, sizeof(lnk));
+ if (len < 0)
+ die("cannot readlink %s", template);
+ if (sizeof(lnk) <= len)
+ die("insanely long symlink %s", template);
+ lnk[len] = 0;
+ if (symlink(lnk, path))
+ die("cannot symlink %s %s", lnk, path);
+ }
+ else if (S_ISREG(st_template.st_mode)) {
+ if (copy_file(path, template, st_template.st_mode))
+ die("cannot copy %s to %s", template, path);
+ }
+ else
+ error("ignoring template %s", template);
+ }
+}
+
+static void copy_templates(const char *git_dir, int len, char *template_dir)
+{
+ char path[PATH_MAX];
+ char template_path[PATH_MAX];
+ int template_len;
+ DIR *dir;
+
+ if (!template_dir)
+ template_dir = DEFAULT_GIT_TEMPLATE_DIR;
+ strcpy(template_path, template_dir);
+ template_len = strlen(template_path);
+ if (template_path[template_len-1] != '/') {
+ template_path[template_len++] = '/';
+ template_path[template_len] = 0;
}
+ dir = opendir(template_path);
+ if (!dir) {
+ fprintf(stderr, "warning: templates not found %s\n",
+ template_dir);
+ return;
+ }
+
+ memcpy(path, git_dir, len);
+ copy_templates_1(path, len,
+ template_path, template_len,
+ dir);
+ closedir(dir);
+}
+
+static void create_default_files(const char *git_dir,
+ char *template_path)
+{
+ unsigned len = strlen(git_dir);
+ static char path[PATH_MAX];
+
+ if (len > sizeof(path)-50)
+ die("insane git directory %s", git_dir);
+ memcpy(path, git_dir, len);
+
+ if (len && path[len-1] != '/')
+ path[len++] = '/';
/*
- * The default case is to have a DB per managed directory.
+ * Create .git/refs/{heads,tags}
*/
- sha1_dir = DEFAULT_DB_ENVIRONMENT;
- fprintf(stderr, "defaulting to private storage area\n");
- len = strlen(sha1_dir);
- if (mkdir(sha1_dir, 0700) < 0) {
+ strcpy(path + len, "refs");
+ safe_create_dir(path);
+ strcpy(path + len, "refs/heads");
+ safe_create_dir(path);
+ strcpy(path + len, "refs/tags");
+ safe_create_dir(path);
+
+ /*
+ * Create the default symlink from ".git/HEAD" to the "master"
+ * branch
+ */
+ strcpy(path + len, "HEAD");
+ if (symlink("refs/heads/master", path) < 0) {
if (errno != EEXIST) {
- perror(sha1_dir);
+ perror(path);
exit(1);
}
}
- path = malloc(len + 40);
+ copy_templates(path, len, template_path);
+}
+
+static const char init_db_usage[] =
+"git-init-db [--template=<template-directory>]";
+
+/*
+ * If you want to, you can share the DB area with any number of branches.
+ * That has advantages: you can save space by sharing all the SHA1 objects.
+ * On the other hand, it might just make lookup slower and messier. You
+ * be the judge. The default case is to have one DB per managed directory.
+ */
+int main(int argc, char **argv)
+{
+ const char *git_dir;
+ const char *sha1_dir;
+ char *path, *template_dir = NULL;
+ int len, i;
+
+ for (i = 1; i < argc; i++, argv++) {
+ char *arg = argv[1];
+ if (arg[0] != '-')
+ break;
+ else if (!strncmp(arg, "--template=", 11))
+ template_dir = arg+11;
+ else
+ die(init_db_usage);
+ }
+
+ /*
+ * Set up the default .git directory contents
+ */
+ git_dir = gitenv(GIT_DIR_ENVIRONMENT);
+ if (!git_dir) {
+ git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
+ fprintf(stderr, "defaulting to local storage area\n");
+ }
+ safe_create_dir(git_dir);
+ create_default_files(git_dir, template_dir);
+
+ /*
+ * And set up the object store.
+ */
+ sha1_dir = get_object_directory();
+ len = strlen(sha1_dir);
+ path = xmalloc(len + 40);
memcpy(path, sha1_dir, len);
+
+ safe_create_dir(sha1_dir);
for (i = 0; i < 256; i++) {
sprintf(path+len, "/%02x", i);
- if (mkdir(path, 0700) < 0) {
- if (errno != EEXIST) {
- perror(path);
- exit(1);
- }
- }
+ safe_create_dir(path);
}
+ strcpy(path+len, "/pack");
+ safe_create_dir(path);
+ strcpy(path+len, "/info");
+ safe_create_dir(path);
return 0;
}