Allow the user to control the verbosity of merge-recursive.
[gitweb.git] / setup.c
diff --git a/setup.c b/setup.c
index 36ede3d87483548bb1ce6c19361d7f6584386147..cc97f9f5c1b8ebfb21a4487d4c5b0ee972797779 100644 (file)
--- a/setup.c
+++ b/setup.c
@@ -62,6 +62,49 @@ const char *prefix_filename(const char *pfx, int pfx_len, const char *arg)
        return path;
 }
 
+/*
+ * Verify a filename that we got as an argument for a pathspec
+ * entry. Note that a filename that begins with "-" never verifies
+ * as true, because even if such a filename were to exist, we want
+ * it to be preceded by the "--" marker (or we want the user to
+ * use a format like "./-filename")
+ */
+void verify_filename(const char *prefix, const char *arg)
+{
+       const char *name;
+       struct stat st;
+
+       if (*arg == '-')
+               die("bad flag '%s' used after filename", arg);
+       name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
+       if (!lstat(name, &st))
+               return;
+       if (errno == ENOENT)
+               die("ambiguous argument '%s': unknown revision or path not in the working tree.\n"
+                   "Use '--' to separate paths from revisions", arg);
+       die("'%s': %s", arg, strerror(errno));
+}
+
+/*
+ * Opposite of the above: the command line did not have -- marker
+ * and we parsed the arg as a refname.  It should not be interpretable
+ * as a filename.
+ */
+void verify_non_filename(const char *prefix, const char *arg)
+{
+       const char *name;
+       struct stat st;
+
+       if (*arg == '-')
+               return; /* flag */
+       name = prefix ? prefix_filename(prefix, strlen(prefix), arg) : arg;
+       if (!lstat(name, &st))
+               die("ambiguous argument '%s': both revision and filename\n"
+                   "Use '--' to separate filenames from revisions", arg);
+       if (errno != ENOENT)
+               die("'%s': %s", arg, strerror(errno));
+}
+
 const char **get_pathspec(const char *prefix, const char **pathspec)
 {
        const char *entry = *pathspec;
@@ -88,28 +131,47 @@ const char **get_pathspec(const char *prefix, const char **pathspec)
 }
 
 /*
- * Test if it looks like we're at the top level git directory.
+ * Test if it looks like we're at a git directory.
  * We want to see:
  *
- *  - either a .git/objects/ directory _or_ the proper
+ *  - either a objects/ directory _or_ the proper
  *    GIT_OBJECT_DIRECTORY environment variable
- *  - a refs/ directory under ".git"
+ *  - a refs/ directory
  *  - either a HEAD symlink or a HEAD file that is formatted as
- *    a proper "ref:".
+ *    a proper "ref:", or a regular file HEAD that has a properly
+ *    formatted sha1 object name.
  */
-static int is_toplevel_directory(void)
+static int is_git_directory(const char *suspect)
 {
-       if (access(".git/refs/", X_OK) ||
-           access(getenv(DB_ENVIRONMENT) ?
-                  getenv(DB_ENVIRONMENT) : ".git/objects/", X_OK) ||
-           validate_symref(".git/HEAD"))
+       char path[PATH_MAX];
+       size_t len = strlen(suspect);
+
+       strcpy(path, suspect);
+       if (getenv(DB_ENVIRONMENT)) {
+               if (access(getenv(DB_ENVIRONMENT), X_OK))
+                       return 0;
+       }
+       else {
+               strcpy(path + len, "/objects");
+               if (access(path, X_OK))
+                       return 0;
+       }
+
+       strcpy(path + len, "/refs");
+       if (access(path, X_OK))
+               return 0;
+
+       strcpy(path + len, "/HEAD");
+       if (validate_headref(path))
                return 0;
+
        return 1;
 }
 
 const char *setup_git_directory_gently(int *nongit_ok)
 {
        static char cwd[PATH_MAX+1];
+       const char *gitdirenv;
        int len, offset;
 
        /*
@@ -117,32 +179,17 @@ const char *setup_git_directory_gently(int *nongit_ok)
         * to do any discovery, but we still do repository
         * validation.
         */
-       if (getenv(GIT_DIR_ENVIRONMENT)) {
-               char path[PATH_MAX];
-               int len = strlen(getenv(GIT_DIR_ENVIRONMENT));
-               if (sizeof(path) - 40 < len)
+       gitdirenv = getenv(GIT_DIR_ENVIRONMENT);
+       if (gitdirenv) {
+               if (PATH_MAX - 40 < strlen(gitdirenv))
                        die("'$%s' too big", GIT_DIR_ENVIRONMENT);
-               memcpy(path, getenv(GIT_DIR_ENVIRONMENT), len);
-               
-               strcpy(path + len, "/refs");
-               if (access(path, X_OK))
-                       goto bad_dir_environ;
-               strcpy(path + len, "/HEAD");
-               if (validate_symref(path))
-                       goto bad_dir_environ;
-               if (getenv(DB_ENVIRONMENT)) {
-                       if (access(getenv(DB_ENVIRONMENT), X_OK))
-                               goto bad_dir_environ;
-               }
-               else {
-                       strcpy(path + len, "/objects");
-                       if (access(path, X_OK))
-                               goto bad_dir_environ;
+               if (is_git_directory(gitdirenv))
+                       return NULL;
+               if (nongit_ok) {
+                       *nongit_ok = 1;
+                       return NULL;
                }
-               return NULL;
-       bad_dir_environ:
-               path[len] = 0;
-               die("Not a git repository: '%s'", path);
+               die("Not a git repository: '%s'", gitdirenv);
        }
 
        if (!getcwd(cwd, sizeof(cwd)) || cwd[0] != '/')
@@ -150,11 +197,17 @@ const char *setup_git_directory_gently(int *nongit_ok)
 
        offset = len = strlen(cwd);
        for (;;) {
-               if (is_toplevel_directory())
+               if (is_git_directory(".git"))
                        break;
                chdir("..");
                do {
                        if (!offset) {
+                               if (is_git_directory(cwd)) {
+                                       if (chdir(cwd))
+                                               die("Cannot come back to cwd");
+                                       setenv(GIT_DIR_ENVIRONMENT, cwd, 1);
+                                       return NULL;
+                               }
                                if (nongit_ok) {
                                        if (chdir(cwd))
                                                die("Cannot come back to cwd");
@@ -176,12 +229,27 @@ const char *setup_git_directory_gently(int *nongit_ok)
        return cwd + offset;
 }
 
+int git_config_perm(const char *var, const char *value)
+{
+       if (value) {
+               if (!strcmp(value, "umask"))
+                       return PERM_UMASK;
+               if (!strcmp(value, "group"))
+                       return PERM_GROUP;
+               if (!strcmp(value, "all") ||
+                   !strcmp(value, "world") ||
+                   !strcmp(value, "everybody"))
+                       return PERM_EVERYBODY;
+       }
+       return git_config_bool(var, value);
+}
+
 int check_repository_format_version(const char *var, const char *value)
 {
        if (strcmp(var, "core.repositoryformatversion") == 0)
                repository_format_version = git_config_int(var, value);
        else if (strcmp(var, "core.sharedrepository") == 0)
-               shared_repository = git_config_bool(var, value);
+               shared_repository = git_config_perm(var, value);
        return 0;
 }