Get rid of the dependency on RCS' merge program

diff --git a/setup.c b/setup.c
index 36ede3d87483548bb1ce6c19361d7f6584386147..2afdba414a073705440f887593a1b5daa1023758 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;
@@ -141,6 +184,10 @@ const char *setup_git_directory_gently(int *nongit_ok)
                }
                return NULL;
        bad_dir_environ:
+               if (nongit_ok) {
+                       *nongit_ok = 1;
+                       return NULL;
+               }
                path[len] = 0;
                die("Not a git repository: '%s'", path);
        }
@@ -176,12 +223,27 @@ 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;
 }