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authorJunio C Hamano <gitster@pobox.com>2010-03-10 23:25:18 (GMT)
committerJunio C Hamano <gitster@pobox.com>2010-03-10 23:25:18 (GMT)
commit2e0e8b68e3ba8ea87f001c45c78f9b7ce549c61f (patch)
tree12363fe88e40f042c24583e829a696505fcb9b7c /builtin/init-db.c
parente007240cb940811a6e075d35f5c3a93a44c54f5a (diff)
parent81b50f3ce40bfdd66e5d967bf82be001039a9a98 (diff)
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Merge branch 'lt/deepen-builtin-source'
* lt/deepen-builtin-source: Move 'builtin-*' into a 'builtin/' subdirectory Conflicts: Makefile
Diffstat (limited to 'builtin/init-db.c')
-rw-r--r--builtin/init-db.c501
1 files changed, 501 insertions, 0 deletions
diff --git a/builtin/init-db.c b/builtin/init-db.c
new file mode 100644
index 0000000..aae7a4d
--- /dev/null
+++ b/builtin/init-db.c
@@ -0,0 +1,501 @@
+/*
+ * GIT - The information manager from hell
+ *
+ * Copyright (C) Linus Torvalds, 2005
+ */
+#include "cache.h"
+#include "builtin.h"
+#include "exec_cmd.h"
+#include "parse-options.h"
+
+#ifndef DEFAULT_GIT_TEMPLATE_DIR
+#define DEFAULT_GIT_TEMPLATE_DIR "/usr/share/git-core/templates"
+#endif
+
+#ifdef NO_TRUSTABLE_FILEMODE
+#define TEST_FILEMODE 0
+#else
+#define TEST_FILEMODE 1
+#endif
+
+static int init_is_bare_repository = 0;
+static int init_shared_repository = -1;
+
+static void safe_create_dir(const char *dir, int share)
+{
+ if (mkdir(dir, 0777) < 0) {
+ if (errno != EEXIST) {
+ perror(dir);
+ exit(1);
+ }
+ }
+ else if (share && adjust_shared_perm(dir))
+ die("Could not make %s writable by group", dir);
+}
+
+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" 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.
+ */
+ safe_create_dir(path, 1);
+ 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_errno("cannot stat '%s'", path);
+ }
+ else
+ exists = 1;
+
+ if (lstat(template, &st_template))
+ die_errno("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_errno("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_errno("cannot readlink '%s'", template);
+ if (sizeof(lnk) <= len)
+ die("insanely long symlink %s", template);
+ lnk[len] = 0;
+ if (symlink(lnk, path))
+ die_errno("cannot symlink '%s' '%s'", lnk, path);
+ }
+ else if (S_ISREG(st_template.st_mode)) {
+ if (copy_file(path, template, st_template.st_mode))
+ die_errno("cannot copy '%s' to '%s'", template,
+ path);
+ }
+ else
+ error("ignoring template %s", template);
+ }
+}
+
+static void copy_templates(const char *template_dir)
+{
+ char path[PATH_MAX];
+ char template_path[PATH_MAX];
+ int template_len;
+ DIR *dir;
+ const char *git_dir = get_git_dir();
+ int len = strlen(git_dir);
+
+ if (!template_dir)
+ template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
+ if (!template_dir)
+ template_dir = system_path(DEFAULT_GIT_TEMPLATE_DIR);
+ if (!template_dir[0])
+ return;
+ template_len = strlen(template_dir);
+ if (PATH_MAX <= (template_len+strlen("/config")))
+ die("insanely long template path %s", template_dir);
+ strcpy(template_path, template_dir);
+ if (template_path[template_len-1] != '/') {
+ template_path[template_len++] = '/';
+ template_path[template_len] = 0;
+ }
+ dir = opendir(template_path);
+ if (!dir) {
+ warning("templates not found %s", template_dir);
+ return;
+ }
+
+ /* Make sure that template is from the correct vintage */
+ strcpy(template_path + template_len, "config");
+ repository_format_version = 0;
+ git_config_from_file(check_repository_format_version,
+ template_path, NULL);
+ template_path[template_len] = 0;
+
+ if (repository_format_version &&
+ repository_format_version != GIT_REPO_VERSION) {
+ warning("not copying templates of "
+ "a wrong format version %d from '%s'",
+ repository_format_version,
+ template_dir);
+ closedir(dir);
+ return;
+ }
+
+ memcpy(path, git_dir, len);
+ if (len && path[len - 1] != '/')
+ path[len++] = '/';
+ path[len] = 0;
+ copy_templates_1(path, len,
+ template_path, template_len,
+ dir);
+ closedir(dir);
+}
+
+static int create_default_files(const char *template_path)
+{
+ const char *git_dir = get_git_dir();
+ unsigned len = strlen(git_dir);
+ static char path[PATH_MAX];
+ struct stat st1;
+ char repo_version_string[10];
+ char junk[2];
+ int reinit;
+ int filemode;
+
+ if (len > sizeof(path)-50)
+ die("insane git directory %s", git_dir);
+ memcpy(path, git_dir, len);
+
+ if (len && path[len-1] != '/')
+ path[len++] = '/';
+
+ /*
+ * Create .git/refs/{heads,tags}
+ */
+ safe_create_dir(git_path("refs"), 1);
+ safe_create_dir(git_path("refs/heads"), 1);
+ safe_create_dir(git_path("refs/tags"), 1);
+
+ /* First copy the templates -- we might have the default
+ * config file there, in which case we would want to read
+ * from it after installing.
+ */
+ copy_templates(template_path);
+
+ git_config(git_default_config, NULL);
+ is_bare_repository_cfg = init_is_bare_repository;
+
+ /* reading existing config may have overwrote it */
+ if (init_shared_repository != -1)
+ shared_repository = init_shared_repository;
+
+ /*
+ * We would have created the above under user's umask -- under
+ * shared-repository settings, we would need to fix them up.
+ */
+ if (shared_repository) {
+ adjust_shared_perm(get_git_dir());
+ adjust_shared_perm(git_path("refs"));
+ adjust_shared_perm(git_path("refs/heads"));
+ adjust_shared_perm(git_path("refs/tags"));
+ }
+
+ /*
+ * Create the default symlink from ".git/HEAD" to the "master"
+ * branch, if it does not exist yet.
+ */
+ strcpy(path + len, "HEAD");
+ reinit = (!access(path, R_OK)
+ || readlink(path, junk, sizeof(junk)-1) != -1);
+ if (!reinit) {
+ if (create_symref("HEAD", "refs/heads/master", NULL) < 0)
+ exit(1);
+ }
+
+ /* This forces creation of new config file */
+ sprintf(repo_version_string, "%d", GIT_REPO_VERSION);
+ git_config_set("core.repositoryformatversion", repo_version_string);
+
+ path[len] = 0;
+ strcpy(path + len, "config");
+
+ /* Check filemode trustability */
+ filemode = TEST_FILEMODE;
+ if (TEST_FILEMODE && !lstat(path, &st1)) {
+ struct stat st2;
+ filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
+ !lstat(path, &st2) &&
+ st1.st_mode != st2.st_mode);
+ }
+ git_config_set("core.filemode", filemode ? "true" : "false");
+
+ if (is_bare_repository())
+ git_config_set("core.bare", "true");
+ else {
+ const char *work_tree = get_git_work_tree();
+ git_config_set("core.bare", "false");
+ /* allow template config file to override the default */
+ if (log_all_ref_updates == -1)
+ git_config_set("core.logallrefupdates", "true");
+ if (prefixcmp(git_dir, work_tree) ||
+ strcmp(git_dir + strlen(work_tree), "/.git")) {
+ git_config_set("core.worktree", work_tree);
+ }
+ }
+
+ if (!reinit) {
+ /* Check if symlink is supported in the work tree */
+ path[len] = 0;
+ strcpy(path + len, "tXXXXXX");
+ if (!close(xmkstemp(path)) &&
+ !unlink(path) &&
+ !symlink("testing", path) &&
+ !lstat(path, &st1) &&
+ S_ISLNK(st1.st_mode))
+ unlink(path); /* good */
+ else
+ git_config_set("core.symlinks", "false");
+
+ /* Check if the filesystem is case-insensitive */
+ path[len] = 0;
+ strcpy(path + len, "CoNfIg");
+ if (!access(path, F_OK))
+ git_config_set("core.ignorecase", "true");
+ }
+
+ return reinit;
+}
+
+int init_db(const char *template_dir, unsigned int flags)
+{
+ const char *sha1_dir;
+ char *path;
+ int len, reinit;
+
+ safe_create_dir(get_git_dir(), 0);
+
+ init_is_bare_repository = is_bare_repository();
+
+ /* Check to see if the repository version is right.
+ * Note that a newly created repository does not have
+ * config file, so this will not fail. What we are catching
+ * is an attempt to reinitialize new repository with an old tool.
+ */
+ check_repository_format();
+
+ reinit = create_default_files(template_dir);
+
+ sha1_dir = get_object_directory();
+ len = strlen(sha1_dir);
+ path = xmalloc(len + 40);
+ memcpy(path, sha1_dir, len);
+
+ safe_create_dir(sha1_dir, 1);
+ strcpy(path+len, "/pack");
+ safe_create_dir(path, 1);
+ strcpy(path+len, "/info");
+ safe_create_dir(path, 1);
+
+ if (shared_repository) {
+ char buf[10];
+ /* We do not spell "group" and such, so that
+ * the configuration can be read by older version
+ * of git. Note, we use octal numbers for new share modes,
+ * and compatibility values for PERM_GROUP and
+ * PERM_EVERYBODY.
+ */
+ if (shared_repository < 0)
+ /* force to the mode value */
+ sprintf(buf, "0%o", -shared_repository);
+ else if (shared_repository == PERM_GROUP)
+ sprintf(buf, "%d", OLD_PERM_GROUP);
+ else if (shared_repository == PERM_EVERYBODY)
+ sprintf(buf, "%d", OLD_PERM_EVERYBODY);
+ else
+ die("oops");
+ git_config_set("core.sharedrepository", buf);
+ git_config_set("receive.denyNonFastforwards", "true");
+ }
+
+ if (!(flags & INIT_DB_QUIET)) {
+ const char *git_dir = get_git_dir();
+ int len = strlen(git_dir);
+ printf("%s%s Git repository in %s%s\n",
+ reinit ? "Reinitialized existing" : "Initialized empty",
+ shared_repository ? " shared" : "",
+ git_dir, len && git_dir[len-1] != '/' ? "/" : "");
+ }
+
+ return 0;
+}
+
+static int guess_repository_type(const char *git_dir)
+{
+ char cwd[PATH_MAX];
+ const char *slash;
+
+ /*
+ * "GIT_DIR=. git init" is always bare.
+ * "GIT_DIR=`pwd` git init" too.
+ */
+ if (!strcmp(".", git_dir))
+ return 1;
+ if (!getcwd(cwd, sizeof(cwd)))
+ die_errno("cannot tell cwd");
+ if (!strcmp(git_dir, cwd))
+ return 1;
+ /*
+ * "GIT_DIR=.git or GIT_DIR=something/.git is usually not.
+ */
+ if (!strcmp(git_dir, ".git"))
+ return 0;
+ slash = strrchr(git_dir, '/');
+ if (slash && !strcmp(slash, "/.git"))
+ return 0;
+
+ /*
+ * Otherwise it is often bare. At this point
+ * we are just guessing.
+ */
+ return 1;
+}
+
+static int shared_callback(const struct option *opt, const char *arg, int unset)
+{
+ *((int *) opt->value) = (arg) ? git_config_perm("arg", arg) : PERM_GROUP;
+ return 0;
+}
+
+static const char *const init_db_usage[] = {
+ "git init [-q | --quiet] [--bare] [--template=<template-directory>] [--shared[=<permissions>]] [directory]",
+ NULL
+};
+
+/*
+ * 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 cmd_init_db(int argc, const char **argv, const char *prefix)
+{
+ const char *git_dir;
+ const char *template_dir = NULL;
+ unsigned int flags = 0;
+ const struct option init_db_options[] = {
+ OPT_STRING(0, "template", &template_dir, "template-directory",
+ "provide the directory from which templates will be used"),
+ OPT_SET_INT(0, "bare", &is_bare_repository_cfg,
+ "create a bare repository", 1),
+ { OPTION_CALLBACK, 0, "shared", &init_shared_repository,
+ "permissions",
+ "specify that the git repository is to be shared amongst several users",
+ PARSE_OPT_OPTARG | PARSE_OPT_NONEG, shared_callback, 0},
+ OPT_BIT('q', "quiet", &flags, "be quiet", INIT_DB_QUIET),
+ OPT_END()
+ };
+
+ argc = parse_options(argc, argv, prefix, init_db_options, init_db_usage, 0);
+
+ if (argc == 1) {
+ int mkdir_tried = 0;
+ retry:
+ if (chdir(argv[0]) < 0) {
+ if (!mkdir_tried) {
+ int saved;
+ /*
+ * At this point we haven't read any configuration,
+ * and we know shared_repository should always be 0;
+ * but just in case we play safe.
+ */
+ saved = shared_repository;
+ shared_repository = 0;
+ switch (safe_create_leading_directories_const(argv[0])) {
+ case -3:
+ errno = EEXIST;
+ /* fallthru */
+ case -1:
+ die_errno("cannot mkdir %s", argv[0]);
+ break;
+ default:
+ break;
+ }
+ shared_repository = saved;
+ if (mkdir(argv[0], 0777) < 0)
+ die_errno("cannot mkdir %s", argv[0]);
+ mkdir_tried = 1;
+ goto retry;
+ }
+ die_errno("cannot chdir to %s", argv[0]);
+ }
+ } else if (0 < argc) {
+ usage(init_db_usage[0]);
+ }
+ if (is_bare_repository_cfg == 1) {
+ static char git_dir[PATH_MAX+1];
+
+ setenv(GIT_DIR_ENVIRONMENT,
+ getcwd(git_dir, sizeof(git_dir)), 0);
+ }
+
+ if (init_shared_repository != -1)
+ shared_repository = init_shared_repository;
+
+ /*
+ * GIT_WORK_TREE makes sense only in conjunction with GIT_DIR
+ * without --bare. Catch the error early.
+ */
+ git_dir = getenv(GIT_DIR_ENVIRONMENT);
+ if ((!git_dir || is_bare_repository_cfg == 1)
+ && getenv(GIT_WORK_TREE_ENVIRONMENT))
+ die("%s (or --work-tree=<directory>) not allowed without "
+ "specifying %s (or --git-dir=<directory>)",
+ GIT_WORK_TREE_ENVIRONMENT,
+ GIT_DIR_ENVIRONMENT);
+
+ /*
+ * Set up the default .git directory contents
+ */
+ if (!git_dir)
+ git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
+
+ if (is_bare_repository_cfg < 0)
+ is_bare_repository_cfg = guess_repository_type(git_dir);
+
+ if (!is_bare_repository_cfg) {
+ if (git_dir) {
+ const char *git_dir_parent = strrchr(git_dir, '/');
+ if (git_dir_parent) {
+ char *rel = xstrndup(git_dir, git_dir_parent - git_dir);
+ git_work_tree_cfg = xstrdup(make_absolute_path(rel));
+ free(rel);
+ }
+ }
+ if (!git_work_tree_cfg) {
+ git_work_tree_cfg = xcalloc(PATH_MAX, 1);
+ if (!getcwd(git_work_tree_cfg, PATH_MAX))
+ die_errno ("Cannot access current working directory");
+ }
+ if (access(get_git_work_tree(), X_OK))
+ die_errno ("Cannot access work tree '%s'",
+ get_git_work_tree());
+ }
+
+ set_git_dir(make_absolute_path(git_dir));
+
+ return init_db(template_dir, flags);
+}