1 files changed, 9 insertions, 5 deletions
diff --git a/vendor/xflags/src/rt.rs b/vendor/xflags/src/rt.rs
index 3c33196af..988e6cc23 100644
--- a/vendor/xflags/src/rt.rs
+++ b/vendor/xflags/src/rt.rs
@@ -4,7 +4,7 @@ use crate::{Error, Result};
 
 macro_rules! format_err {
     ($($tt:tt)*) => {
-        Error { msg: format!($($tt)*) }
+        Error { msg: format!($($tt)*), help: false }
     };
 }
 
@@ -94,6 +94,14 @@ impl Parser {
         format_err!("unexpected argument: {:?}", arg)
     }
 
+    pub fn subcommand_required(&self) -> Error {
+        format_err!("subcommand is required")
+    }
+
+    pub fn help(&self, help: &'static str) -> Error {
+        Error { msg: help.to_string(), help: true }
+    }
+
     pub fn optional<T>(&self, flag: &str, mut vals: Vec<T>) -> Result<Option<T>> {
         if vals.len() > 1 {
             bail!("flag specified more than once: `{}`", flag)
@@ -107,8 +115,4 @@ impl Parser {
         }
         vals.pop().ok_or_else(|| format_err!("flag is required: `{}`", flag))
     }
-
-    pub fn subcommand<T>(&self, cmd: Option<T>) -> Result<T> {
-        cmd.ok_or_else(|| format_err!("subcommand is required"))
-    }
 }