use no-stream to disable streaming

src/cli.rs

@@ -168,7 +168,10 @@ Example: --print=Hb"
     pub quiet: bool,
 
     /// Always stream the response body.
-    #[clap(short = 'S', long, default_missing_value = "true", num_args= 0..=1, require_equals = true)]
+    #[clap(short = 'S', long = "stream", name = "stream")]
+    pub stream_raw: bool,
+
+    #[clap(skip)]
     pub stream: Option<bool>,
 
     /// Save output to FILE instead of stdout.
@@ -555,6 +558,12 @@ impl Cli {
             (false, true) => Some(false),
             (false, false) => None,
         };
+        self.stream = match (self.stream_raw, matches.get_flag("no-stream")) {
+            (true, true) => unreachable!(),
+            (true, false) => Some(true),
+            (false, true) => Some(false),
+            (false, false) => None,
+        };
         if self.download {
             self.follow = true;
             self.check_status = Some(true);
@@ -1691,6 +1700,24 @@ mod tests {
         assert_eq!(cli.check_status, Some(true));
     }
 
+    #[test]
+    fn negating_stream() {
+        let cli = parse([":"]).unwrap();
+        assert_eq!(cli.stream, None);
+
+        let cli = parse(["--stream", ":"]).unwrap();
+        assert_eq!(cli.stream, Some(true));
+
+        let cli = parse(["--no-stream", ":"]).unwrap();
+        assert_eq!(cli.stream, Some(false));
+
+        let cli = parse(["--stream", "--no-stream", ":"]).unwrap();
+        assert_eq!(cli.stream, Some(false));
+
+        let cli = parse(["--no-stream", "--stream", ":"]).unwrap();
+        assert_eq!(cli.stream, Some(true));
+    }
+
     #[test]
     fn parse_encoding_label() {
         let test_cases = vec![