Documentation/git-svn: clarify dcommit, rebase vs pull/merge

diff --git a/builtin-init-db.c b/builtin-init-db.c
index 6a24e9bcab4a7b364b69f9ccf2ae822c40873895..97fd82ff0664aa9a79cf1ace20dac1a5c0064743 100644 (file)
--- a/builtin-init-db.c
+++ b/builtin-init-db.c
@@ -10,6 +10,12 @@
 #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 void safe_create_dir(const char *dir, int share)
 {
        if (mkdir(dir, 0777) < 0) {
@@ -124,8 +130,11 @@ static void copy_templates(const char *git_dir, int len, const char *template_di
        int template_len;
        DIR *dir;
 
-       if (!template_dir)
-               template_dir = DEFAULT_GIT_TEMPLATE_DIR;
+       if (!template_dir) {
+               template_dir = getenv(TEMPLATE_DIR_ENVIRONMENT);
+               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] != '/') {
@@ -164,13 +173,15 @@ static void copy_templates(const char *git_dir, int len, const char *template_di
        closedir(dir);
 }
 
-static void create_default_files(const char *git_dir, const char *template_path)
+static int create_default_files(const char *git_dir, const char *template_path)
 {
        unsigned len = strlen(git_dir);
        static char path[PATH_MAX];
        unsigned char sha1[20];
        struct stat st1;
        char repo_version_string[10];
+       int reinit;
+       int filemode;
 
        if (len > sizeof(path)-50)
                die("insane git directory %s", git_dir);
@@ -218,8 +229,9 @@ static void create_default_files(const char *git_dir, const char *template_path)
         * branch, if it does not exist yet.
         */
        strcpy(path + len, "HEAD");
-       if (read_ref(path, sha1) < 0) {
-               if (create_symref(path, "refs/heads/master") < 0)
+       reinit = !read_ref("HEAD", sha1);
+       if (!reinit) {
+               if (create_symref("HEAD", "refs/heads/master") < 0)
                        exit(1);
        }
 
@@ -231,14 +243,19 @@ static void create_default_files(const char *git_dir, const char *template_path)
        strcpy(path + len, "config");
 
        /* Check filemode trustability */
-       if (!lstat(path, &st1)) {
+       filemode = TEST_FILEMODE;
+       if (TEST_FILEMODE && !lstat(path, &st1)) {
                struct stat st2;
-               int filemode = (!chmod(path, st1.st_mode ^ S_IXUSR) &&
+               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");
        }
+       git_config_set("core.filemode", filemode ? "true" : "false");
+
+       /* Enable logAllRefUpdates if a working tree is attached */
+       if (!is_bare_git_dir(git_dir))
+               git_config_set("core.logallrefupdates", "true");
+       return reinit;
 }
 
 static const char init_db_usage[] =
@@ -250,32 +267,32 @@ static const char init_db_usage[] =
  * 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, char **envp)
+int cmd_init_db(int argc, const char **argv, const char *prefix)
 {
        const char *git_dir;
        const char *sha1_dir;
        const char *template_dir = NULL;
        char *path;
-       int len, i;
+       int len, i, reinit;
 
        for (i = 1; i < argc; i++, argv++) {
                const char *arg = argv[1];
                if (!strncmp(arg, "--template=", 11))
                        template_dir = arg+11;
                else if (!strcmp(arg, "--shared"))
-                       shared_repository = 1;
+                       shared_repository = PERM_GROUP;
+               else if (!strncmp(arg, "--shared=", 9))
+                       shared_repository = git_config_perm("arg", arg+9);
                else
-                       die(init_db_usage);
+                       usage(init_db_usage);
        }
 
        /*
         * Set up the default .git directory contents
         */
        git_dir = getenv(GIT_DIR_ENVIRONMENT);
-       if (!git_dir) {
+       if (!git_dir)
                git_dir = DEFAULT_GIT_DIR_ENVIRONMENT;
-               fprintf(stderr, "defaulting to local storage area\n");
-       }
        safe_create_dir(git_dir, 0);
 
        /* Check to see if the repository version is right.
@@ -285,7 +302,7 @@ int cmd_init_db(int argc, const char **argv, char **envp)
         */
        check_repository_format();
 
-       create_default_files(git_dir, template_dir);
+       reinit = create_default_files(git_dir, template_dir);
 
        /*
         * And set up the object store.
@@ -301,8 +318,21 @@ int cmd_init_db(int argc, const char **argv, char **envp)
        strcpy(path+len, "/info");
        safe_create_dir(path, 1);
 
-       if (shared_repository)
-               git_config_set("core.sharedrepository", "true");
+       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.
+                */
+               sprintf(buf, "%d", shared_repository);
+               git_config_set("core.sharedrepository", buf);
+               git_config_set("receive.denyNonFastforwards", "true");
+       }
+
+       printf("%s%s Git repository in %s/\n",
+               reinit ? "Reinitialized existing" : "Initialized empty",
+               shared_repository ? " shared" : "",
+               git_dir);
 
        return 0;
 }