fix: fixes hiding args from short or long help in v3 context

Fixes the implementation of the hiding of arguments form the short or long help on v3

src/app/help.rs

@@ -176,7 +176,7 @@ impl<'w> Help<'w> {
     fn write_args_unsorted<'a, 'b, I>(&mut self, args: I) -> io::Result<()>
         where
             'a: 'b,
-        I: Iterator<Item = &'b Arg<'a, 'b>>,
+            I: Iterator<Item=&'b Arg<'a, 'b>>,
     {
         debugln!("Help::write_args_unsorted;");
         // The shortest an arg can legally be is 2 (i.e. '-x')
@@ -210,7 +210,7 @@ impl<'w> Help<'w> {
     fn write_args<'a, 'b, I>(&mut self, args: I) -> io::Result<()>
         where
             'a: 'b,
-        I: Iterator<Item = &'b Arg<'a, 'b>>,
+            I: Iterator<Item=&'b Arg<'a, 'b>>,
     {
         debugln!("Help::write_args;");
         // The shortest an arg can legally be is 2 (i.e. '-x')
@@ -558,14 +558,17 @@ impl<'w> Help<'w> {
         }
         spec_vals.join(" ")
     }
+}
 
-    fn should_show_arg(use_long: bool, arg: &Arg) -> bool {
-        if arg.is_set(ArgSettings::Hidden) {
-            return false;
-        }
-        (!arg.is_set(ArgSettings::HiddenLongHelp) && use_long) ||
-            (!arg.is_set(ArgSettings::HiddenShortHelp) && !use_long) ||
-        arg.is_set(ArgSettings::NextLineHelp)
+/// Methods to write a single subcommand
+impl<'w> Help<'w> {
+    fn write_subcommand<'a, 'b>(&mut self, app: &App<'a, 'b>) -> io::Result<()> {
+        debugln!("Help::write_subcommand;");
+        write!(self.writer, "{}", TAB)?;
+        color!(self, "{}", app.name, good)?;
+        let spec_vals = self.sc_val(app)?;
+        self.sc_help(app, &*spec_vals)?;
+        Ok(())
     }
 
     fn sc_val<'a, 'b>(&mut self, app: &App<'a, 'b>) -> Result<String, io::Error> {
@@ -587,6 +590,87 @@ impl<'w> Help<'w> {
         }
         Ok(spec_vals)
     }
+
+    fn sc_spec_vals(&self, a: &App) -> String {
+        debugln!("Help::sc_spec_vals: a={}", a.name);
+        let mut spec_vals = vec![];
+        if let Some(ref aliases) = a.aliases {
+            debugln!("Help::spec_vals: Found aliases...{:?}", aliases);
+            let als = if self.color {
+                aliases
+                    .iter()
+                    .filter(|&als| als.1) // visible
+                    .map(|&als| format!("{}", self.cizer.good(als.0))) // name
+                    .collect::<Vec<_>>()
+                    .join(", ")
+            } else {
+                aliases
+                    .iter()
+                    .filter(|&als| als.1)
+                    .map(|&als| als.0)
+                    .collect::<Vec<_>>()
+                    .join(", ")
+            };
+            if !als.is_empty() {
+                spec_vals.push(format!(" [aliases: {}]", als));
+            }
+        }
+        spec_vals.join(" ")
+    }
+
+    fn sc_help<'a, 'b>(&mut self, app: &App<'a, 'b>, spec_vals: &str) -> io::Result<()> {
+        debugln!("Help::sc_help;");
+        let h = if self.use_long {
+            app.long_about.unwrap_or_else(|| app.about.unwrap_or(""))
+        } else {
+            app.about.unwrap_or_else(|| app.long_about.unwrap_or(""))
+        };
+        let mut help = String::from(h) + spec_vals;
+        let nlh = self.next_line_help || self.use_long;
+        debugln!("Help::sc_help: Next Line...{:?}", nlh);
+
+        let spcs = if nlh || self.force_next_line {
+            12 // "tab" * 3
+        } else {
+            self.longest + 12
+        };
+
+        let too_long = spcs + str_width(h) + str_width(&*spec_vals) >= self.term_w;
+
+        // Is help on next line, if so then indent
+        if nlh || self.force_next_line {
+            write!(self.writer, "\n{}{}{}", TAB, TAB, TAB)?;
+        }
+
+        debug!("Help::sc_help: Too long...");
+        if too_long && spcs <= self.term_w || h.contains("{n}") {
+            sdebugln!("Yes");
+            debugln!("Help::sc_help: help...{}", help);
+            debugln!("Help::sc_help: help width...{}", str_width(&*help));
+            // Determine how many newlines we need to insert
+            let avail_chars = self.term_w - spcs;
+            debugln!("Help::sc_help: Usable space...{}", avail_chars);
+            help = wrap_help(&help.replace("{n}", "\n"), avail_chars);
+        } else {
+            sdebugln!("No");
+        }
+        if let Some(part) = help.lines().next() {
+            write!(self.writer, "{}", part)?;
+        }
+        for part in help.lines().skip(1) {
+            write!(self.writer, "\n")?;
+            if nlh || self.force_next_line {
+                write!(self.writer, "{}{}{}", TAB, TAB, TAB)?;
+            } else {
+                write_nspaces!(self.writer, self.longest + 8);
+            }
+            write!(self.writer, "{}", part)?;
+        }
+        if !help.contains('\n') && (nlh || self.force_next_line) {
+            write!(self.writer, "\n")?;
+        }
+        Ok(())
+    }
 }
 
 // Methods to write Parser help.
@@ -600,10 +684,10 @@ impl<'w> Help<'w> {
         let flags = parser.has_flags();
         // Strange filter/count vs fold... https://github.com/rust-lang/rust/issues/33038
         let pos = positionals!(parser.app).fold(0, |acc, arg| {
-            if arg.is_set(ArgSettings::Hidden) {
-                acc
-            } else {
+            if should_show_arg(self.use_long, arg) {
                 acc + 1
+            } else {
+                acc
             }
         }) > 0;
         let opts = parser.has_opts();
@@ -1017,6 +1101,17 @@ impl<'w> Help<'w> {
     }
 }
 
+fn should_show_arg(use_long: bool, arg: &Arg) -> bool {
+    debugln!("Help::should_show_arg: use_long={:?}, arg={}", use_long, arg.name);
+    if arg.is_set(ArgSettings::Hidden) {
+        return false;
+    }
+    (!arg.is_set(ArgSettings::HiddenLongHelp) && use_long) ||
+        (!arg.is_set(ArgSettings::HiddenShortHelp) && !use_long) ||
+        arg.is_set(ArgSettings::NextLineHelp)
+}
+
+
 fn wrap_help(help: &str, avail_chars: usize) -> String {
     let wrapper = textwrap::Wrapper::new(avail_chars).break_words(false);
     help.lines()

src/app/parser.rs

@@ -8,8 +8,8 @@ use std::iter::Peekable;
 use std::mem;
 use std::cell::Cell;
 
-// Third party
-use map::{self, VecMap};
+// Third party facade
+use map::VecMap;
 
 // Internal
 use INTERNAL_ERROR_MSG;
@@ -927,52 +927,49 @@ where
     }
 
     fn use_long_help(&self) -> bool {
+        debugln!("Parser::use_long_help;");
         // In this case, both must be checked. This allows the retention of 
         // original formatting, but also ensures that the actual -h or --help
         // specified by the user is sent through. If HiddenShortHelp is not included,
         // then items specified with hidden_short_help will also be hidden.
-        let should_long = |v: &Base| { 
+        let should_long = |v: &Arg| {
             v.long_help.is_some() || 
             v.is_set(ArgSettings::HiddenLongHelp) || 
             v.is_set(ArgSettings::HiddenShortHelp) 
         };
 
-        self.meta.long_about.is_some() 
-            || self.flags.iter().any(|f| should_long(&f.b))
-            || self.opts.iter().any(|o| should_long(&o.b))
-            || self.positionals.values().any(|p| should_long(&p.b))
-            || self.subcommands
-                .iter()
-                .any(|s| s.p.meta.long_about.is_some())
+        self.app.long_about.is_some()
+            || args!(self.app).any(|f| should_long(&f))
+            || subcommands!(self.app).any(|s| s.long_about.is_some())
     }
     
-    fn _help(&self, mut use_long: bool) -> Error {
-        debugln!("Parser::_help: use_long={:?}", use_long);
-        use_long = use_long && self.use_long_help();
-        let mut buf = vec![];
-        match Help::write_parser_help(&mut buf, self, use_long) {
-            Err(e) => e,
-            _ => Error {
-                message: String::from_utf8(buf).unwrap_or_default(),
-                kind: ErrorKind::HelpDisplayed,
-                info: None,
-            },
-        }
-    }
-
-    fn _version(&self, use_long: bool) -> Error {
-        debugln!("Parser::_version: ");
-        let out = io::stdout();
-        let mut buf_w = BufWriter::new(out.lock());
-        match self.print_version(&mut buf_w, use_long) {
-            Err(e) => e,
-            _ => Error {
-                message: String::new(),
-                kind: ErrorKind::VersionDisplayed,
-                info: None,
-            },
-        }
-    }
+//    fn _help(&self, mut use_long: bool) -> ClapError {
+//        debugln!("Parser::_help: use_long={:?}", use_long && self.use_long_help());
+//        use_long = use_long && self.use_long_help();
+//        let mut buf = vec![];
+//        match Help::write_parser_help(&mut buf, self, use_long) {
+//            Err(e) => e,
+//            _ => ClapError {
+//                message: String::from_utf8(buf).unwrap_or_default(),
+//                kind: ErrorKind::HelpDisplayed,
+//                info: None,
+//            },
+//        }
+//    }
+//
+//    fn _version(&self, use_long: bool) -> ClapError {
+//        debugln!("Parser::_version: ");
+//        let out = io::stdout();
+//        let mut buf_w = BufWriter::new(out.lock());
+//        match self.print_version(&mut buf_w, use_long) {
+//            Err(e) => e,
+//            _ => ClapError {
+//                message: String::new(),
+//                kind: ErrorKind::VersionDisplayed,
+//                info: None,
+//            },
+//        }
+//    }
 
     fn parse_long_arg(
         &mut self,
@@ -1512,8 +1509,8 @@ where
     }
 
     fn help_err(&self, mut use_long: bool) -> ClapError {
-        debugln!("Parser::_help: use_long={:?}", use_long);
-        use_long = use_long && self.app.use_long_help();
+        debugln!("Parser::help_err: use_long={:?}", use_long && self.use_long_help());
+        use_long = use_long && self.use_long_help();
         let mut buf = vec![];
         match Help::write_parser_help(&mut buf, self, use_long) {
             Err(e) => e,
@@ -1526,7 +1523,7 @@ where
     }
 
     fn version_err(&self, use_long: bool) -> ClapError {
-        debugln!("Parser::_version: ");
+        debugln!("Parser::version_err: ");
         let out = io::stdout();
         let mut buf_w = BufWriter::new(out.lock());
         match self.print_version(&mut buf_w, use_long) {

src/args/arg.rs

@@ -10,6 +10,7 @@ use osstringext::OsStrExt3;
 use std::os::unix::ffi::OsStrExt;
 use std::env;
 use std::cmp::{Ord, Ordering};
+use std::str;
 
 #[cfg(feature = "yaml")]
 use yaml_rust::Yaml;
@@ -4250,7 +4251,7 @@ mod test {
         f.long = Some("flag");
         f.aliases = Some(vec![("als", true)]);
 
-        assert_eq!(&*format!("{}", f), "--flag");
+        assert_eq!(&*format!("{}", f), "--flag")
     }
 
     #[test]

tests/hidden_args.rs

@@ -30,7 +30,7 @@ fn hidden_args() {
             Arg::from_usage("-f, --flag 'some flag'").hidden(true),
             Arg::from_usage("-F, --flag2 'some other flag'"),
             Arg::from_usage("--option [opt] 'some option'"),
-            Arg::with_name("DUMMY").required(false).hidden(true),
+            Arg::with_name("DUMMY").hidden(true),
         ]);
     assert!(test::compare_output(app, "test --help", HIDDEN_ARGS, false));
 }