fix(usage): Don't include irrelevant parent args

This was identified in #4134

Author: epage

src/builder/command.rs

@@ -4336,7 +4336,8 @@ impl<'help> App<'help> {
         use std::fmt::Write;
 
         let mut mid_string = String::from(" ");
-        if !self.is_subcommand_negates_reqs_set() {
+        if !self.is_subcommand_negates_reqs_set() && !self.is_args_conflicts_with_subcommands_set()
+        {
             let reqs = Usage::new(self).get_required_usage_from(&[], None, true); // maybe Some(m)
 
             for s in &reqs {
@@ -4419,7 +4420,9 @@ impl<'help> App<'help> {
 
         if !self.is_set(AppSettings::BinNameBuilt) {
             let mut mid_string = String::from(" ");
-            if !self.is_subcommand_negates_reqs_set() {
+            if !self.is_subcommand_negates_reqs_set()
+                && !self.is_args_conflicts_with_subcommands_set()
+            {
                 let reqs = Usage::new(self).get_required_usage_from(&[], None, true); // maybe Some(m)
 
                 for s in &reqs {

tests/builder/help.rs

@@ -829,14 +829,6 @@ fn multi_level_sc_help() {
     utils::assert_output(cmd, "ctest help subcmd multi", MULTI_SC_HELP, false);
 }
 
-#[test]
-fn no_wrap_help() {
-    let cmd = Command::new("ctest")
-        .term_width(0)
-        .override_help(MULTI_SC_HELP);
-    utils::assert_output(cmd, "ctest --help", &format!("{}\n", MULTI_SC_HELP), false);
-}
-
 #[test]
 fn no_wrap_default_help() {
     let cmd = Command::new("ctest").version("1.0").term_width(0);
@@ -2857,6 +2849,50 @@ OPTIONS:
     utils::assert_eq(EXPECTED, String::from_utf8(buf).unwrap());
 }
 
+#[test]
+fn parent_cmd_req_ignored_when_negates_reqs() {
+    static MULTI_SC_HELP: &str = "ctest-subcmd 
+
+USAGE:
+    ctest subcmd
+
+OPTIONS:
+    -h, --help    Print help information
+";
+
+    let cmd = Command::new("ctest")
+        .arg(arg!(<input>))
+        .subcommand_negates_reqs(true)
+        .subcommand(Command::new("subcmd"));
+    utils::assert_output(cmd, "ctest subcmd --help", MULTI_SC_HELP, false);
+}
+
+#[test]
+fn parent_cmd_req_ignored_when_conflicts() {
+    static MULTI_SC_HELP: &str = "ctest-subcmd 
+
+USAGE:
+    ctest subcmd
+
+OPTIONS:
+    -h, --help    Print help information
+";
+
+    let cmd = Command::new("ctest")
+        .arg(arg!(<input>))
+        .args_conflicts_with_subcommands(true)
+        .subcommand(Command::new("subcmd"));
+    utils::assert_output(cmd, "ctest subcmd --help", MULTI_SC_HELP, false);
+}
+
+#[test]
+fn no_wrap_help() {
+    let cmd = Command::new("ctest")
+        .term_width(0)
+        .override_help(MULTI_SC_HELP);
+    utils::assert_output(cmd, "ctest --help", &format!("{}\n", MULTI_SC_HELP), false);
+}
+
 #[test]
 fn display_name_default() {
     let mut cmd = Command::new("app").bin_name("app.exe");