From bbfa72c02e72cdb213bd362787376866bb8a0b83 Mon Sep 17 00:00:00 2001
From: The MMGen Project <mmgen@tuta.io>
Date: Sat, 29 Aug 2026 15:04:29 +0000
Subject: [PATCH] cfg: add opts_data['requires']

---
 mmgen/cfg.py           | 11 ++++++++++-
 test/cmdtest_d/opts.py | 16 ++++++++++++++++
 test/misc/opts_main.py |  4 ++++
 3 files changed, 30 insertions(+), 1 deletion(-)

diff --git a/mmgen/cfg.py b/mmgen/cfg.py
index f05f0aa6..acb995f4 100755
--- a/mmgen/cfg.py
+++ b/mmgen/cfg.py
@@ -584,10 +584,12 @@ class Config(Lockable):
 		# Step 7: set auto typeset opts from user-supplied data or cfgfile data, in that order:
 		self._set_auto_typeset_opts(self._cfgfile_opts.auto_typeset)
 
-		# Step 8: process opts_data['sets']:
+		# Step 8: process opts_data['sets'] and opts_data['requires']:
 		if opts_data:
 			if 'sets' in opts_data:
 				self._set_opts_data_sets_opts(opts_data)
+			if 'requires' in opts_data: # for required value of None, use False instead
+				self._check_opts_data_requires_opts(opts_data)
 
 		if 'usage' in self._uopts: # requires self.coin
 			import importlib
@@ -789,6 +791,13 @@ class Config(Lockable):
 							fmt_opt_val(b_opt, usr_b_val),
 							fmt_opt_val(a_opt, usr_a_val)))
 
+	def _check_opts_data_requires_opts(self, opts_data):
+		for a_opt, a_val, b_opt, b_val in opts_data['requires']:
+			if getattr(self, a_opt, False) == a_val and getattr(self, b_opt, False) != b_val:
+				die('UserOptError', 'Option {} requires option {}\n'.format(
+					fmt_opt_val(a_opt, a_val),
+					fmt_opt_val(b_opt, b_val)))
+
 	def _die_on_incompatible_opts(self):
 		for group in self._incompatible_opts:
 			bad = [k for k in self.__dict__
diff --git a/test/cmdtest_d/opts.py b/test/cmdtest_d/opts.py
index fb45e560..04e83643 100755
--- a/test/cmdtest_d/opts.py
+++ b/test/cmdtest_d/opts.py
@@ -54,6 +54,8 @@ class CmdTestOpts(CmdTestBase):
 		('opt_good31',           (41, 'good cmdline opt (--xmr-rpc-port=28081)', [])),
 		('opt_good32',           (41, 'good cmdline opt (A sets B)', [])),
 		('opt_good33',           (41, 'good cmdline opt (A sets not B)', [])),
+		('opt_good34',           (41, 'good cmdline opt (A requires B)', [])),
+		('opt_good35',           (41, 'good cmdline opt (A requires not B)', [])),
 		('opt_bad_param',        (41, 'bad global opt (--pager=1)', [])),
 		('opt_bad_infile',       (41, 'bad infile parameter', [])),
 		('opt_bad_outdir',       (41, 'bad outdir parameter', [])),
@@ -61,6 +63,8 @@ class CmdTestOpts(CmdTestBase):
 		('opt_bad_autoset',      (41, 'invalid autoset value', [])),
 		('opt_bad_sets1',        (41, "invalid value for opts_data['sets']", [])),
 		('opt_bad_sets2',        (41, "invalid value for opts_data['sets']", [])),
+		('opt_bad_requires1',    (41, "invalid value for opts_data['requires']", [])),
+		('opt_bad_requires2',    (41, "invalid value for opts_data['requires']", [])),
 		('opt_invalid_1',        (41, 'invalid cmdline opt ‘--x’', [])),
 		('opt_invalid_2',        (41, 'invalid cmdline opt ‘---’', [])),
 		('opt_invalid_5',        (41, 'invalid cmdline opt (missing parameter)', [])),
@@ -319,6 +323,12 @@ class CmdTestOpts(CmdTestBase):
 	def opt_good33(self):
 		return self.do_run(['--silent', '--no-verbose'], None, 0)
 
+	def opt_good34(self):
+		return self.do_run(['--coin=DOGE', '--no-foobleize'], None, 0)
+
+	def opt_good35(self):
+		return self.do_run(['--no-silent', '--no-foobleize'], None, 0)
+
 	def opt_bad_param(self):
 		return self.do_run(['--pager=1'], 'no parameter', 1)
 
@@ -342,6 +352,12 @@ class CmdTestOpts(CmdTestBase):
 	def opt_bad_sets2(self):
 		return self.do_run(['--no-foobleize', '--in-fmt=csv'], 'conflicts with', 1)
 
+	def opt_bad_requires1(self):
+		return self.do_run(['--coin=DOGE'], 'requires option', 1)
+
+	def opt_bad_requires2(self):
+		return self.do_run(['--no-foobleize', '--silent'], 'requires option --no-', 1)
+
 	def opt_invalid(self, args, expect, opts=[], need_proto=False, exit_val=1):
 		t = self.spawn_prog(args, opts=opts, exit_val=exit_val, need_proto=need_proto)
 		t.expect(expect)
diff --git a/test/misc/opts_main.py b/test/misc/opts_main.py
index 2ffdc310..aa2742de 100755
--- a/test/misc/opts_main.py
+++ b/test/misc/opts_main.py
@@ -11,6 +11,10 @@ opts_data = {
 		('silent', True, 'verbose', False),
 		('no_foobleize', True, 'in_fmt', 'hex'),
 	],
+	'requires': [
+		('coin', 'DOGE', 'no_foobleize', True),
+		('no_foobleize', True, 'silent', False),
+	],
 	'text': {
 		'desc': 'Opts test',
 		'usage':'[args] [opts]',