Add `--bugreport-path` option

It has precedence over the environment variable `RUBY_BUGREPORT_PATH`.

error.c

@@ -839,13 +839,17 @@ open_report_path(const char *template, char *buf, size_t size, rb_pid_t *pid)
     return NULL;
 }
 
+static const char *bugreport_path;
+
 /* SIGSEGV handler might have a very small stack. Thus we need to use it carefully. */
 #define REPORT_BUG_BUFSIZ 256
 static FILE *
 bug_report_file(const char *file, int line, rb_pid_t *pid)
 {
     char buf[REPORT_BUG_BUFSIZ];
-    FILE *out = open_report_path(getenv("RUBY_BUGREPORT_PATH"), buf, sizeof(buf), pid);
+    const char *report = bugreport_path;
+    if (!report) report = getenv("RUBY_BUGREPORT_PATH");
+    FILE *out = open_report_path(report, buf, sizeof(buf), pid);
     int len = err_position_0(buf, sizeof(buf), file, line);
 
     if (out) {
@@ -998,8 +1002,10 @@ bug_report_end(FILE *out, rb_pid_t pid)
 } while (0) \
 
 void
-ruby_test_bug_report(const char *template)
+ruby_set_bug_report(const char *template)
 {
+    bugreport_path = template;
+#if RUBY_DEBUG
     rb_pid_t pid = -1;
     char buf[REPORT_BUG_BUFSIZ];
     FILE *out = open_report_path(template, buf, sizeof(buf), &pid);
@@ -1008,6 +1014,7 @@ ruby_test_bug_report(const char *template)
         fprintf(out, "ruby_test_bug_report: %s", ctime(&t));
         finish_report(out, pid);
     }
+#endif
 }
 
 NORETURN(static void die(void));

internal/cmdlineopt.h

@@ -28,6 +28,8 @@ typedef struct ruby_cmdline_options {
     struct rb_rjit_options rjit;
 #endif
 
+    const char *bugreport_path;
+
     signed int sflag: 2;
     unsigned int xflag: 1;
     unsigned int warning: 1;

man/ruby.1

@@ -25,6 +25,7 @@
 .Op Fl - Ns Bro Cm enable Ns | Ns Cm disable Brc Ns - Ns Ar FEATURE
 .Op Fl -dump Ns = Ns Ar target
 .Op Fl -verbose
+.Op Fl -bugreport-path Ns = Ns Ar template
 .Op Fl -
 .Op Ar program_file
 .Op Ar argument ...
@@ -469,6 +470,12 @@ variable to true.
 If this switch is given, and no script arguments (script file or
 .Fl e
 options) are present, Ruby quits immediately.
+.Pp
+.It Fl -bugreport-path Ns = Ns Ar template
+Sets the template of path name to save bug report.
+See
+.Ev RUBY_BUGREPORT_PATH
+environment variable for details.
 .El
 .Pp
 .Sh ENVIRONMENT

ruby.c

@@ -337,6 +337,7 @@ usage(const char *name, int help, int highlight, int columns)
         M("--backtrace-limit=num",                  "", "limit the maximum length of backtrace"),
         M("--verbose",                              "", "turn on verbose mode and disable script from stdin"),
         M("--version",                              "", "print the version number, then exit"),
+        M("--bugreport-path=TEMPLATE",              "", "template of bug report files"),
         M("-y",                          ", --yydebug", "print log of parser. Backward compatibility is not guaranteed"),
         M("--help",			            "", "show this message, -h for short message"),
     };
@@ -1352,8 +1353,6 @@ proc_encoding_option(ruby_cmdline_options_t *opt, const char *s, const char *opt
     UNREACHABLE;
 }
 
-static const char *test_bug_report_template;
-
 static long
 proc_long_options(ruby_cmdline_options_t *opt, const char *s, long argc, char **argv, int envopt)
 {
@@ -1464,8 +1463,10 @@ proc_long_options(ruby_cmdline_options_t *opt, const char *s, long argc, char **
             opt->backtrace_length_limit = n;
         }
     }
-    else if (is_option_with_arg("test-bugreport", true, false)) {
-        test_bug_report_template = s;
+    else if (is_option_with_arg("bugreport-path", true, true)) {
+        if (!opt->bugreport_path) {
+            opt->bugreport_path = s;
+        }
     }
     else {
         rb_raise(rb_eRuntimeError,
@@ -2916,9 +2917,9 @@ ruby_process_options(int argc, char **argv)
 
     iseq = process_options(argc, argv, cmdline_options_init(&opt));
 
-    if (test_bug_report_template) {
-        void ruby_test_bug_report(const char *template);
-        ruby_test_bug_report(test_bug_report_template);
+    if (opt.bugreport_path && *opt.bugreport_path) {
+        void ruby_set_bug_report(const char *template);
+        ruby_set_bug_report(opt.bugreport_path);
     }
     return (void*)(struct RData*)iseq;
 }