use std::collections::{BTreeMap, HashMap, VecDeque}; use std::slice::Iter; use std::io::{self, BufWriter, Write}; use std::ffi::{OsStr, OsString}; use std::fmt::Display; #[cfg(feature = "debug")] use std::os::unix::ffi::OsStrExt; use vec_map::VecMap; use app::App; use args::{Arg, FlagBuilder, OptBuilder, ArgGroup, PosBuilder}; use app::settings::{AppSettings, AppFlags}; use args::{AnyArg, ArgMatcher}; use args::settings::{ArgSettings, ArgFlags}; use errors::{ErrorKind, Error}; use errors::Result as ClapResult; use INVALID_UTF8; use suggestions; use INTERNAL_ERROR_MSG; use SubCommand; use fmt::Format; use osstringext::OsStrExt2; use app::meta::AppMeta; use args::MatchedArg; #[doc(hidden)] pub struct Parser<'a, 'b> where 'a: 'b { required: Vec<&'b str>, short_list: Vec, long_list: Vec<&'b str>, blacklist: Vec<&'b str>, // A list of possible flags flags: Vec>, // A list of possible options opts: Vec>, // A list of positional arguments positionals: VecMap>, // A list of subcommands subcommands: Vec>, groups: HashMap<&'a str, ArgGroup<'a>>, global_args: Vec>, overrides: Vec<&'b str>, help_short: Option, version_short: Option, settings: AppFlags, version: Option<&'b str>, pub meta: AppMeta<'b>, } impl<'a, 'b> Default for Parser<'a, 'b> { fn default() -> Self { Parser { flags: vec![], opts: vec![], positionals: VecMap::new(), subcommands: vec![], help_short: None, version_short: None, required: vec![], short_list: vec![], long_list: vec![], blacklist: vec![], groups: HashMap::new(), global_args: vec![], overrides: vec![], settings: AppFlags::new(), version: None, meta: AppMeta::new(), } } } macro_rules! parse_positional { ($_self:ident, $p:ident, $arg_os:ident, $pos_only:ident, $pos_counter:ident, $matcher:ident) => { debugln!("macro=parse_positional!;"); validate_multiples!($_self, $p, $matcher); if let Err(e) = $_self.add_val_to_arg($p, &$arg_os, $matcher) { return Err(e); } if !$pos_only && ($_self.settings.is_set(AppSettings::TrailingVarArg) && $pos_counter == $_self.positionals.len()) { $pos_only = true; } $matcher.inc_occurrence_of($p.name); let _ = $_self.groups_for_arg($p.name).and_then(|vec| Some($matcher.inc_occurrences_of(&*vec))); arg_post_processing!($_self, $p, $matcher); // Only increment the positional counter if it doesn't allow multiples if !$p.settings.is_set(ArgSettings::Multiple) { $pos_counter += 1; } }; } impl<'a, 'b> Parser<'a, 'b> where 'a: 'b { pub fn with_name(n: String) -> Self { Parser { meta: AppMeta::with_name(n), ..Default::default() } } pub fn help_short(&mut self, s: &str) { self.help_short = s.trim_left_matches(|c| c == '-') .chars() .nth(0); } pub fn version_short(&mut self, s: &str) { self.version_short = s.trim_left_matches(|c| c == '-') .chars() .nth(0); } // actually adds the arguments pub fn add_arg(&mut self, a: &Arg<'a, 'b>) { assert!(!(self.flags.iter().any(|f| &f.name == &a.name) || self.opts.iter().any(|o| o.name == a.name) || self.positionals.values().any(|p| p.name == a.name)), format!("Non-unique argument name: {} is already in use", a.name)); if let Some(grp) = a.group { let ag = self.groups.entry(grp).or_insert_with(|| ArgGroup::with_name(grp)); ag.args.push(a.name); } if let Some(s) = a.short { assert!(!self.short_list.contains(&s), format!("Argument short must be unique\n\n\t-{} is already in use", s)); self.short_list.push(s); } if let Some(l) = a.long { assert!(!self.long_list.contains(&l), format!("Argument long must be unique\n\n\t--{} is already in use", l)); self.long_list.push(l); if l == "help" { self.set(AppSettings::NeedsLongHelp); } else if l == "version" { self.set(AppSettings::NeedsLongVersion); } } if a.is_set(ArgSettings::Required) { self.required.push(a.name); } if a.index.is_some() || (a.short.is_none() && a.long.is_none()) { let i = if a.index.is_none() { (self.positionals.len() + 1) } else { a.index.unwrap() as usize }; assert!(!self.positionals.contains_key(&i), format!("Argument \"{}\" has the same index as another positional \ argument\n\n\tPerhaps try .multiple(true) to allow one positional argument \ to take multiple values", a.name)); let pb = PosBuilder::from_arg(&a, i as u8, &mut self.required); self.positionals.insert(i, pb); } else if a.is_set(ArgSettings::TakesValue) { let ob = OptBuilder::from_arg(&a, &mut self.required); self.opts.push(ob); } else { let fb = FlagBuilder::from(a); self.flags.push(fb); } if a.is_set(ArgSettings::Global) { assert!(!a.is_set(ArgSettings::Required), format!("Global arguments cannot be required.\n\n\t'{}' is marked as global and \ required", a.name)); self.global_args.push(a.into()); } } pub fn add_group(&mut self, group: ArgGroup<'a>) { if group.required { self.required.push(group.name.into()); if let Some(ref reqs) = group.requires { for &r in reqs { self.required.push(r.into()); } } if let Some(ref bl) = group.conflicts { for &b in bl { self.blacklist.push(b.into()); } } } let mut found = false; if let Some(ref mut grp) = self.groups.get_mut(&group.name) { for a in &group.args { grp.args.push(a); } grp.requires = group.requires.clone(); grp.conflicts = group.conflicts.clone(); grp.required = group.required; found = true; } if !found { self.groups.insert(group.name.into(), group); } } pub fn add_subcommand(&mut self, mut subcmd: App<'a, 'b>) { if subcmd.0.meta.name == "help" { self.settings.set(AppSettings::NeedsSubcommandHelp); } if self.settings.is_set(AppSettings::VersionlessSubcommands) { subcmd.0.settings.set(AppSettings::DisableVersion); } if self.settings.is_set(AppSettings::GlobalVersion) && subcmd.0.meta.version.is_none() && self.version.is_some() { subcmd.0.meta.version = Some(self.version.unwrap()); } self.subcommands.push(subcmd); } pub fn required(&self) -> Iter<&str> { self.required.iter() } pub fn get_required_from(&self, reqs: &[&'a str], matcher: Option<&ArgMatcher<'a>>) -> VecDeque { let mut c_flags: Vec<&str> = vec![]; let mut c_pos: Vec<&str> = vec![]; let mut c_opt: Vec<&str> = vec![]; let mut grps: Vec<&str> = vec![]; for name in reqs { if self.flags.iter().any(|f| &f.name == name) { c_flags.push(name); } else if self.opts.iter().any(|o| &o.name == name) { c_opt.push(name); } else if self.groups.contains_key(name) { grps.push(name); } else { c_pos.push(name); } } let mut tmp_f = vec![]; for f in &c_flags { if let Some(f) = self.flags.iter().filter(|flg| &flg.name == f).next() { if let Some(ref rl) = f.requires { for r in rl { if !reqs.contains(r) { if self.flags.iter().any(|f| &f.name == r) { tmp_f.push(r); } else if self.opts.iter().any(|o| &o.name == r) { c_opt.push(r); } else if self.groups.contains_key(r) { grps.push(r); } else { c_pos.push(r); } } } } } } for f in tmp_f.into_iter() { c_flags.push(f); } let mut tmp_o = vec![]; for f in &c_opt { if let Some(f) = self.opts.iter().filter(|o| &o.name == f).next() { if let Some(ref rl) = f.requires { for r in rl { if !reqs.contains(&r) { if self.flags.iter().any(|f| &f.name == r) { c_flags.push(r); } else if self.opts.iter().any(|o| &o.name == r) { tmp_o.push(r); } else if self.groups.contains_key(r) { grps.push(&r); } else { c_pos.push(r); } } } } } } for f in tmp_o.into_iter() { c_opt.push(f); } let mut tmp_p = vec![]; for p in &c_pos { if let Some(p) = self.positionals.values().filter(|pos| &pos.name == p).next() { if let Some(ref rl) = p.requires { for r in rl { if !reqs.contains(&&**r) { if self.flags.iter().any(|f| &f.name == r) { c_flags.push(r); } else if self.opts.iter().any(|o| &o.name == r) { c_opt.push(r); } else if self.groups.contains_key(r) { grps.push(&&**r); } else { tmp_p.push(r); } } } } } } for f in tmp_p.into_iter() { c_pos.push(f); } let mut ret_val = VecDeque::new(); let mut pmap = BTreeMap::new(); for p in c_pos.into_iter() { if matcher.is_some() && matcher.as_ref().unwrap().contains(p) { continue; } if let Some(p) = self.positionals.values().filter(|x| &x.name == &p).next() { pmap.insert(p.index, format!("{}", p)); } } for (_, s) in pmap { ret_val.push_back(s); } for f in c_flags.into_iter() { if matcher.is_some() && matcher.as_ref().unwrap().contains(f) { continue; } ret_val.push_back(format!("{}", self.flags .iter() .filter(|flg| &flg.name == &f) .next() .unwrap())); } for o in c_opt.into_iter() { if matcher.is_some() && matcher.as_ref().unwrap().contains(o) { continue; } ret_val.push_back(format!("{}", self.opts .iter() .filter(|opt| &opt.name == &o) .next() .unwrap())); } for g in grps.into_iter() { let g_string = self.args_in_group(g) .iter() .fold(String::new(), |acc, s| acc + &format!(" {} |", s)[..]); ret_val.push_back(format!("[{}]", &g_string[..g_string.len() - 1])); } ret_val } pub fn has_flags(&self) -> bool { self.flags.is_empty() } pub fn has_opts(&self) -> bool { self.opts.is_empty() } pub fn has_positionals(&self) -> bool { self.positionals.is_empty() } pub fn has_subcommands(&self) -> bool { self.subcommands.is_empty() } pub fn is_set(&self, s: AppSettings) -> bool { self.settings.is_set(s) } pub fn set(&mut self, s: AppSettings) { self.settings.set(s) } pub fn verify_positionals(&mut self) { // Because you must wait until all arguments have been supplied, this is the first chance // to make assertions on positional argument indexes // // Firt we verify that the index highest supplied index, is equal to the number of // positional arguments to verify there are no gaps (i.e. supplying an index of 1 and 3 // but no 2) if let Some((idx, ref p)) = self.positionals.iter().rev().next() { assert!(!(idx != self.positionals.len()), format!("Found positional argument \"{}\" who's index is {} but there are only {} \ positional arguments defined", p.name, idx, self.positionals.len())); } // Next we verify that only the highest index has a .multiple(true) (if any) assert!(!self.positionals.values() .any(|a| a.settings.is_set(ArgSettings::Multiple) && (a.index as usize != self.positionals.len()) ), "Only the positional argument with the highest index may accept multiple values"); // If it's required we also need to ensure all previous positionals are // required too let mut found = false; for p in self.positionals.values().rev() { if !found { if p.settings.is_set(ArgSettings::Required) { found = true; continue; } } else { assert!(p.settings.is_set(ArgSettings::Required), "Found positional argument which is not required with a lower index than a \ required positional argument: {:?} index {}", p.name, p.index); } } } pub fn propogate_globals(&mut self) { for sc in &mut self.subcommands { // We have to create a new scope in order to tell rustc the borrow of `sc` is // done and to recursively call this method { for a in &self.global_args { sc.0.add_arg(a); } } sc.0.propogate_globals(); } } // The actual parsing function #[cfg_attr(feature = "lints", allow(while_let_on_iterator))] pub fn get_matches_with(&mut self, matcher: &mut ArgMatcher<'a>, it: &mut I) -> ClapResult<()> where I: Iterator, T: Into { debugln!("fn=get_matches_with;"); // First we create the `--help` and `--version` arguments and add them if // necessary self.create_help_and_version(); let mut pos_only = false; let mut subcmd_name: Option = None; let mut needs_val_of: Option<&str> = None; let mut pos_counter = 1; while let Some(arg) = it.next() { let arg_os = arg.into(); debugln!("Begin parsing '{:?}' ({:?})", arg_os, &*arg_os.as_bytes()); // Is this a new argument, or values from a previous option? debug!("Starts new arg..."); let starts_new_arg = if arg_os.starts_with(b"-") { sdebugln!("Yes"); !(arg_os.len() == 1) } else { sdebugln!("No"); false }; // Has the user already passed '--'? if !pos_only { if !starts_new_arg || self.is_set(AppSettings::AllowLeadingHyphen) { // Check to see if parsing a value from an option if let Some(nvo) = needs_val_of { // get the OptBuilder so we can check the settings if let Some(opt) = self.opts.iter().filter(|o| &o.name == &nvo).next() { needs_val_of = try!(self.add_val_to_arg(opt, &arg_os, matcher)); // get the next value from the iterator continue; } } } if arg_os.starts_with(b"--") { if arg_os.len() == 2 { // The user has passed '--' which means only positional args follow no matter // what they start with pos_only = true; continue; } needs_val_of = try!(self.parse_long_arg(matcher, &arg_os)); continue; } else if arg_os.starts_with(b"-") && arg_os.len() != 1 { needs_val_of = try!(self.parse_short_arg(matcher, &arg_os)); if !(needs_val_of.is_none() && self.is_set(AppSettings::AllowLeadingHyphen)) { continue; } } // let arg_str = arg_os.to_str().expect(INVALID_UTF8); if self.subcommands.iter().any(|s| &s.0.meta.name[..] == &*arg_os) { if &*arg_os == "help" && self.settings.is_set(AppSettings::NeedsSubcommandHelp) { return self._help(); } // subcommands only support valid UTF-8 subcmd_name = Some(arg_os.to_str().expect(INVALID_UTF8).to_owned()); break; } else if let Some(candidate) = suggestions::did_you_mean( &*arg_os.to_string_lossy(), self.subcommands.iter().map(|s| &s.0.meta.name)) { return Err( Error::invalid_subcommand(arg_os.to_string_lossy().into_owned(), candidate, self.meta.bin_name.as_ref().unwrap_or(&self.meta.name), &*self.create_current_usage(matcher))); } } if let Some(p) = self.positionals.get(&pos_counter) { parse_positional!(self, p, arg_os, pos_only, pos_counter, matcher); } else { if self.settings.is_set(AppSettings::AllowExternalSubcommands) { // let arg_str = arg_os.to_str().expect(INVALID_UTF8); let mut sc_m = ArgMatcher::new(); while let Some(v) = it.next() { let a = v.into(); if let None = a.to_str() { if !self.settings.is_set(AppSettings::StrictUtf8) { return Err( Error::invalid_utf8(&*self.create_current_usage(matcher)) ); } } sc_m.add_val_to("EXTERNAL_SUBCOMMAND", &a); } matcher.subcommand(SubCommand { name: "EXTERNAL_SUBCOMMAND".into(), matches: sc_m.into(), }); } else { return Err(Error::unknown_argument( &*arg_os.to_string_lossy(), "", //self.meta.bin_name.as_ref().unwrap_or(&self.meta.name), &*self.create_current_usage(matcher))); } } } let mut reqs_validated = false; if let Some(a) = needs_val_of { if let Some(o) = self.opts.iter().filter(|o| &o.name == &a).next() { try!(self.validate_required(matcher)); reqs_validated = true; let should_err = if let Some(ref v) = matcher.0.args.get(&*o.name) { v.vals.is_empty() && !(o.min_vals.is_some() && o.min_vals.unwrap() == 0) } else { true }; if should_err { return Err(Error::empty_value(o, &*self.create_current_usage(matcher))); } } else { return Err(Error::empty_value(self.positionals .values() .filter(|p| &p.name == &a) .next() .expect(INTERNAL_ERROR_MSG), &*self.create_current_usage(matcher))); } } try!(self.validate_blacklist(matcher)); try!(self.validate_num_args(matcher)); matcher.usage(self.create_usage(&[])); if !(self.settings.is_set(AppSettings::SubcommandsNegateReqs) && subcmd_name.is_some()) && !reqs_validated { try!(self.validate_required(matcher)); } if let Some(sc_name) = subcmd_name { try!(self.parse_subcommand(sc_name, matcher, it)); } else if self.is_set(AppSettings::SubcommandRequired) { let bn = self.meta.bin_name.as_ref().unwrap_or(&self.meta.name); return Err(Error::missing_subcommand(bn, &self.create_current_usage(matcher))); } else if self.is_set(AppSettings::SubcommandRequiredElseHelp) { let mut out = vec![]; try!(self.write_help(&mut out)); return Err(Error { message: String::from_utf8_lossy(&*out).into_owned(), kind: ErrorKind::MissingArgumentOrSubcommand, info: None, }); } if matcher.is_empty() && matcher.subcommand_name().is_none() && self.is_set(AppSettings::ArgRequiredElseHelp) { let mut out = vec![]; try!(self.write_help(&mut out)); return Err(Error { message: String::from_utf8_lossy(&*out).into_owned(), kind: ErrorKind::MissingArgumentOrSubcommand, info: None, }); } Ok(()) } fn parse_subcommand(&mut self, sc_name: String, matcher: &mut ArgMatcher<'a>, it: &mut I) -> ClapResult<()> where I: Iterator, T: Into { use std::fmt::Write; debugln!("fn=parse_subcommand;"); let mut mid_string = String::new(); if !self.settings.is_set(AppSettings::SubcommandsNegateReqs) { let mut hs: Vec<&str> = self.required.iter().map(|n| &**n).collect(); for k in matcher.arg_names() { hs.push(k); } let reqs = self.get_required_from(&hs, Some(matcher)); for s in &reqs { write!(&mut mid_string, " {}", s).expect(INTERNAL_ERROR_MSG); } } mid_string.push_str(" "); if let Some(ref mut sc) = self.subcommands .iter_mut() .filter(|s| &s.0.meta.name[..] == &sc_name) .next() { let mut sc_matcher = ArgMatcher::new(); // bin_name should be parent's bin_name + [] + the sc's name separated by // a space sc.0.meta.usage = Some(format!("{}{}{}", self.meta.bin_name.as_ref().unwrap_or(&String::new()), if self.meta.bin_name.is_some() { &*mid_string } else { "" }, &*sc.0.meta.name)); sc.0.meta.bin_name = Some(format!("{}{}{}", self.meta.bin_name.as_ref().unwrap_or(&String::new()), if self.meta.bin_name.is_some() { " " } else { "" }, &*sc.0.meta.name)); try!(sc.0.get_matches_with(&mut sc_matcher, it)); matcher.subcommand(SubCommand { name: sc.0.meta.name.clone(), matches: sc_matcher.into(), }); } Ok(()) } fn blacklisted_from(&self, name: &str, matcher: &ArgMatcher) -> Option { for k in matcher.arg_names() { if let Some(f) = self.flags.iter().filter(|f| &f.name == &k).next() { if let Some(ref bl) = f.blacklist { if bl.contains(&name) { return Some(format!("{}", f)); } } } if let Some(o) = self.opts.iter().filter(|o| &o.name == &k).next() { if let Some(ref bl) = o.blacklist { if bl.contains(&name) { return Some(format!("{}", o)); } } } if let Some(pos) = self.positionals.values().filter(|p| &p.name == &k).next() { if let Some(ref bl) = pos.blacklist { if bl.contains(&name) { return Some(format!("{}", pos)); } } } } None } fn overriden_from(&self, name: &str, matcher: &ArgMatcher) -> Option<&'a str> { for k in matcher.arg_names() { if let Some(f) = self.flags.iter().filter(|f| &f.name == &k).next() { if let Some(ref bl) = f.overrides { if bl.contains(&name.into()) { return Some(f.name); } } } if let Some(o) = self.opts.iter().filter(|o| &o.name == &k).next() { if let Some(ref bl) = o.overrides { if bl.contains(&name.into()) { return Some(o.name); } } } if let Some(pos) = self.positionals.values().filter(|p| &p.name == &k).next() { if let Some(ref bl) = pos.overrides { if bl.contains(&name.into()) { return Some(pos.name); } } } } None } fn groups_for_arg(&self, name: &str) -> Option> { debugln!("fn=groups_for_arg;"); if self.groups.is_empty() { debugln!("No groups defined"); return None; } let mut res = vec![]; debugln!("Searching through groups..."); for (gn, grp) in &self.groups { for a in &grp.args { if a == &name { sdebugln!("\tFound '{}'", gn); res.push(*gn); } } } if res.is_empty() { return None; } Some(res) } fn args_in_group(&self, group: &str) -> Vec { let mut g_vec = vec![]; let mut args = vec![]; for n in &self.groups.get(group).unwrap().args { if let Some(f) = self.flags.iter().filter(|f| &f.name == n).next() { args.push(f.to_string()); } else if let Some(f) = self.opts.iter().filter(|o| &o.name == n).next() { args.push(f.to_string()); } else if self.groups.contains_key(&**n) { g_vec.push(*n); } else { if let Some(p) = self.positionals .values() .filter(|p| &p.name == n) .next() { args.push(p.to_string()); } } } if !g_vec.is_empty() { for av in g_vec.iter().map(|g| self.args_in_group(g)) { for a in av { args.push(a); } } } assert!(!args.is_empty(), "ArgGroup '{}' doesn't contain any args", group); args.dedup(); args.iter().map(ToOwned::to_owned).collect() } fn arg_names_in_group(&self, group: &str) -> Vec<&'a str> { let mut g_vec = vec![]; let mut args = vec![]; for n in &self.groups.get(group).unwrap().args { if self.flags.iter().any(|f| &f.name == n) { args.push(*n); } else if self.opts.iter().any(|o| &o.name == n) { args.push(*n); } else if self.groups.contains_key(&**n) { g_vec.push(*n); } else if self.positionals.values().any(|p| &p.name == n) { args.push(*n); } } if !g_vec.is_empty() { for av in g_vec.iter().map(|g| self.arg_names_in_group(g)) { for a in av { args.push(a.into()); } } } assert!(!args.is_empty(), "ArgGroup '{}' doesn't contain any args", group); args.dedup(); args.iter().map(|s| *s).collect() } fn create_help_and_version(&mut self) { debugln!("fn=create_help_and_version;"); // name is "hclap_help" because flags are sorted by name if !self.flags.iter().any(|a| a.long.is_some() && a.long.unwrap() == "help") { if self.help_short.is_none() && !self.short_list.contains(&'h') { self.help_short = Some('h'); } let arg = FlagBuilder { name: "hclap_help".into(), short: self.help_short, long: Some("help".into()), help: Some("Prints help information".into()), blacklist: None, requires: None, overrides: None, settings: ArgFlags::new(), }; self.long_list.push("help".into()); self.flags.push(arg); } if !self.settings.is_set(AppSettings::DisableVersion) && !self.flags.iter().any(|a| a.long.is_some() && a.long.unwrap() == "version") { if self.version_short.is_none() && !self.short_list.contains(&'V') { self.version_short = Some('V'); } // name is "vclap_version" because flags are sorted by name let arg = FlagBuilder { name: "vclap_version".into(), short: self.version_short, long: Some("version".into()), help: Some("Prints version information".into()), blacklist: None, requires: None, overrides: None, settings: ArgFlags::new(), }; self.long_list.push("version".into()); self.flags.push(arg); } if !self.subcommands.is_empty() && !self.subcommands .iter() .any(|s| &s.0.meta.name[..] == "help") { self.subcommands.push(App::new("help").about("Prints this message")); } } // Retrieves the names of all args the user has supplied thus far, except required ones // because those will be listed in self.required pub fn create_current_usage(&self, matcher: &'b ArgMatcher<'a>) -> String { self.create_usage( &*matcher.arg_names() .iter() .filter(|n| { if let Some(o) = self.opts .iter() .filter(|&o| &&o.name == n) .next() { !o.settings.is_set(ArgSettings::Required) } else if let Some(p) = self.positionals .values() .filter(|&p| &&p.name == n) .next() { !p.settings.is_set(ArgSettings::Required) } else { true // flags can't be required, so they're always true }}) .map(|&n| n) .collect::>()) } fn check_for_help_and_version_str(&self, arg: &OsStr) -> ClapResult<()> { debug!("Checking if --{} is help or version...", arg.to_str().unwrap()); if arg == "help" && self.settings.is_set(AppSettings::NeedsLongHelp) { try!(self._help()); } if arg == "version" && self.settings.is_set(AppSettings::NeedsLongVersion) { try!(self._version()); } sdebugln!("Neither"); Ok(()) } fn check_for_help_and_version_char(&self, arg: char) -> ClapResult<()> { debug!("Checking if -{} is help or version...", arg); if let Some(h) = self.help_short { if arg == h { try!(self._help()); } } if let Some(v) = self.version_short { if arg == v { try!(self._version()); } } sdebugln!("Neither"); Ok(()) } fn _help(&self) -> ClapResult<()> { try!(self.print_help()); Err(Error { message: String::new(), kind: ErrorKind::HelpDisplayed, info: None, }) } fn _version(&self) -> ClapResult<()> { let out = io::stdout(); let mut buf_w = BufWriter::new(out.lock()); try!(self.print_version(&mut buf_w)); Err(Error { message: String::new(), kind: ErrorKind::VersionDisplayed, info: None, }) } fn parse_long_arg(&mut self, matcher: &mut ArgMatcher<'a>, full_arg: &OsStr) -> ClapResult> { // maybe here lifetime should be 'a debugln!("fn=parse_long_arg;"); let mut val = None; debug!("Does it contain '='..."); let arg = if full_arg.contains_byte(b'=') { let (p0, p1) = full_arg.trim_left_matches(b'-').split_at_byte(b'='); sdebugln!("Yes '{:?}'", p1); val = Some(p1); p0 } else { sdebugln!("No"); full_arg.trim_left_matches(b'-') }; if let Some(opt) = self.opts .iter() .filter(|v| v.long.is_some() && &*v.long.unwrap() == arg) .next() { debugln!("Found valid opt '{}'", opt.to_string()); let ret = try!(self.parse_opt(val, opt, matcher)); arg_post_processing!(self, opt, matcher); return Ok(ret); } else if let Some(flag) = self.flags .iter() .filter(|v| v.long.is_some() && &*v.long.unwrap() == arg) .next() { debugln!("Found valid flag '{}'", flag.to_string()); // Only flags could be help or version, and we need to check the raw long // so this is the first point to check try!(self.check_for_help_and_version_str(&arg)); try!(self.parse_flag(flag, matcher)); // Handle conflicts, requirements, etc. arg_post_processing!(self, flag, matcher); return Ok(None); } debugln!("Didn't match anything"); self.did_you_mean_error(arg.to_str().expect(INVALID_UTF8), matcher).map(|_| None) } fn parse_short_arg(&mut self, matcher: &mut ArgMatcher<'a>, full_arg: &OsStr) -> ClapResult> { debugln!("fn=parse_short_arg;"); // let mut utf8 = true; let arg_os = full_arg.trim_left_matches(b'-'); let arg = arg_os.to_string_lossy(); for c in arg.chars() { // Check for matching short options, and return the name if there is no trailing // concatenated value: -oval // Option: -o // Value: val if let Some(opt) = self.opts .iter() .filter(|&v| v.short.is_some() && v.short.unwrap() == c) .next() { debugln!("Found valid short opt -{} in '{}'", c, arg); // Check for trailing concatenated value let p: Vec<_> = arg.splitn(2, c).collect(); debugln!("arg: {:?}, arg_os: {:?}, full_arg: {:?}", arg, arg_os, full_arg); debugln!("p[0]: {:?}, p[1]: {:?}", p[0].as_bytes(), p[1].as_bytes()); let i = p[0].as_bytes().len() + 1; let val = if p[1].as_bytes().len() > 0 { debugln!("setting val: {:?} (bytes), {:?} (ascii)", arg_os.split_at(i).1.as_bytes(), arg_os.split_at(i).1); Some(arg_os.split_at(i).1) } else { None }; // Default to "we're expecting a value later" let ret = try!(self.parse_opt(val, opt, matcher)); arg_post_processing!(self, opt, matcher); return Ok(ret); } else if let Some(flag) = self.flags.iter().filter(|&v| v.short.is_some() && v.short.unwrap() == c).next() { debugln!("Found valid short flag -{}", c); // Only flags can be help or version try!(self.check_for_help_and_version_char(c)); try!(self.parse_flag(flag, matcher)); // Handle conflicts, requirements, overrides, etc. // Must be called here due to mutablilty arg_post_processing!(self, flag, matcher); } else if !self.is_set(AppSettings::AllowLeadingHyphen) { let mut arg = String::new(); arg.push('-'); arg.push(c); return Err( Error::unknown_argument(&*arg, "", &*self.create_current_usage(matcher))); } } Ok(None) } fn parse_opt(&self, val: Option<&OsStr>, opt: &OptBuilder<'a, 'b>, matcher: &mut ArgMatcher<'a>) -> ClapResult> { debugln!("fn=parse_opt;"); validate_multiples!(self, opt, matcher); debug!("Checking for val..."); if let Some(fv) = val { let v = fv.trim_left_matches(b'='); if !opt.is_set(ArgSettings::EmptyValues) && v.len() == 0 { sdebugln!("Found Empty - Error"); return Err(Error::empty_value(opt, &*self.create_current_usage(matcher))); } sdebugln!("Found - {:?}, len: {}", v, v.len()); try!(self.add_val_to_arg(opt, v, matcher)); } else { sdebugln!("None"); } matcher.inc_occurrence_of(opt.name); // Increment or create the group "args" self.groups_for_arg(opt.name).and_then(|vec| Some(matcher.inc_occurrences_of(&*vec))); if val.is_none() || opt.is_set(ArgSettings::Multiple) { return Ok(Some(opt.name)); } Ok(None) } fn add_val_to_arg(&self, arg: &A, val: &OsStr, matcher: &mut ArgMatcher<'a>) -> ClapResult> where A: AnyArg<'a, 'b> + Display { debugln!("fn=add_val_to_arg;"); let mut ret = None; if let Some(delim) = arg.val_delim() { for v in val.split(delim as u32 as u8) { ret = try!(self.add_single_val_to_arg(arg, v, matcher)); } } else { ret = try!(self.add_single_val_to_arg(arg, val, matcher)); } Ok(ret) } fn add_single_val_to_arg(&self, arg: &A, v: &OsStr, matcher: &mut ArgMatcher<'a>) -> ClapResult> where A: AnyArg<'a, 'b> { debugln!("adding val: {:?}", v); matcher.add_val_to(arg.name(), v); // Increment or create the group "args" if let Some(grps) = self.groups_for_arg(arg.name()) { for grp in grps { matcher.add_val_to(&*grp, v); } } // The validation must come AFTER inserting into 'matcher' or the usage string // can't be built self.validate_value(arg, v, matcher) } fn validate_value(&self, arg: &A, val: &OsStr, matcher: &ArgMatcher<'a>) -> ClapResult> where A: AnyArg<'a, 'b> { debugln!("fn=validate_value; val={:?}", val); if self.is_set(AppSettings::StrictUtf8) && val.to_str().is_none() { return Err(Error::invalid_utf8(&*self.create_current_usage(matcher))); } if let Some(ref p_vals) = arg.possible_vals() { let val_str = val.to_string_lossy(); if !p_vals.contains(&&*val_str) { return Err( Error::invalid_value(val_str, p_vals, arg, &*self.create_current_usage(matcher))); } } if !arg.is_set(ArgSettings::EmptyValues) && val.is_empty() && matcher.contains(&*arg.name()) { return Err(Error::empty_value(arg, &*self.create_current_usage(matcher))); } if let Some(ref vtor) = arg.validator() { if let Err(e) = vtor(val.to_string_lossy().into_owned()) { return Err(Error::value_validation(e)); } } let vals = matcher.get(&*arg.name()) .expect(INTERNAL_ERROR_MSG) .vals.len(); if let Some(max) = arg.max_vals() { if (vals as u8) < max { return Ok(Some(arg.name())); } else { return Ok(None); } } if let Some(..) = arg.min_vals() { return Ok(Some(arg.name())); } if let Some(num) = arg.num_vals() { if arg.is_set(ArgSettings::Multiple) { if (vals as u8) < num { return Ok(Some(arg.name())); } } else { if (vals as u8 % num) != 0 { return Ok(Some(arg.name())); } } } if arg.is_set(ArgSettings::Multiple) { return Ok(Some(arg.name())); } Ok(None) } fn parse_flag(&self, flag: &FlagBuilder<'a, 'b>, matcher: &mut ArgMatcher<'a>) -> ClapResult<()> { debugln!("fn=parse_flag;"); validate_multiples!(self, flag, matcher); matcher.inc_occurrence_of(flag.name); // Increment or create the group "args" self.groups_for_arg(flag.name).and_then(|vec| Some(matcher.inc_occurrences_of(&*vec))); Ok(()) } fn validate_blacklist(&self, matcher: &mut ArgMatcher) -> ClapResult<()> { debugln!("fn=validate_blacklist;"); macro_rules! build_err { ($me:ident, $name:expr, $matcher:ident) => ({ debugln!("macro=build_err;"); let c_with = $me.blacklisted_from($name, &$matcher); debugln!("'{:?}' conflicts with '{}'", c_with, $name); let usg = $me.create_current_usage($matcher); if let Some(f) = $me.flags.iter().filter(|f| f.name == $name).next() { debugln!("It was a flag..."); Error::argument_conflict(f, c_with, &*usg) } else if let Some(o) = $me.opts.iter() .filter(|o| o.name == $name) .next() { debugln!("It was an option..."); Error::argument_conflict(o, c_with, &*usg) } else { match $me.positionals.values() .filter(|p| p.name == $name) .next() { Some(p) => { debugln!("It was a positional..."); Error::argument_conflict(p, c_with, &*usg) }, None => panic!(INTERNAL_ERROR_MSG) } } }); } for name in &self.blacklist { debugln!("Checking blacklisted name: {}", name); if self.groups.contains_key(name) { debugln!("groups contains it..."); for n in self.arg_names_in_group(name) { debugln!("Checking arg '{}' in group...", n); if matcher.contains(&n) { debugln!("matcher contains it..."); return Err(build_err!(self, n, matcher)); } } } else if matcher.contains(name) { debugln!("matcher contains it..."); return Err(build_err!(self, *name, matcher)); } } Ok(()) } fn validate_num_args(&self, matcher: &mut ArgMatcher) -> ClapResult<()> { debugln!("fn=validate_num_args;"); for (name, ma) in matcher.iter() { if self.groups.contains_key(&**name) { continue; } else { if let Some(opt) = self.opts .iter() .filter(|o| &o.name == name) .next() { try!(self._validate_num_vals(opt, ma, matcher)); } else if let Some(pos) = self.positionals .values() .filter(|p| &p.name == name) .next() { try!(self._validate_num_vals(pos, ma, matcher)); } } } Ok(()) } fn _validate_num_vals(&self, a: &A, ma: &MatchedArg, matcher: &ArgMatcher) -> ClapResult<()> where A: AnyArg<'a, 'b> { debugln!("fn=_validate_num_vals;"); if let Some(num) = a.num_vals() { debugln!("num_vals set: {}", num); let should_err = if a.is_set(ArgSettings::Multiple) { ((ma.vals.len() as u8) % num) != 0 } else { num != (ma.vals.len() as u8) }; if should_err { debugln!("Sending error WrongNumberOfValues"); return Err(Error::wrong_number_of_values( a, num, if a.is_set(ArgSettings::Multiple) { (ma.vals.len() % num as usize) } else { ma.vals.len() }, if ma.vals.len() == 1 || (a.is_set(ArgSettings::Multiple) && (ma.vals.len() % num as usize) == 1) { "as" } else { "ere" }, &*self.create_current_usage(matcher))); } } if let Some(num) = a.max_vals() { debugln!("max_vals set: {}", num); if (ma.vals.len() as u8) > num { debugln!("Sending error TooManyValues"); return Err(Error::too_many_values( ma.vals.get(&ma.vals.keys() .last() .expect(INTERNAL_ERROR_MSG)) .expect(INTERNAL_ERROR_MSG).to_str().expect(INVALID_UTF8), a, &*self.create_current_usage(matcher))); } } if let Some(num) = a.min_vals() { debugln!("min_vals set: {}", num); if (ma.vals.len() as u8) < num { debugln!("Sending error TooFewValues"); return Err(Error::too_few_values( a, num, ma.vals.len(), &*self.create_current_usage(matcher))); } } Ok(()) } fn validate_required(&self, matcher: &ArgMatcher) -> ClapResult<()> { 'outer: for name in &self.required { if matcher.contains(name) { continue 'outer; } if let Some(grp) = self.groups.get(name) { for arg in &grp.args { if matcher.contains(arg) { continue 'outer; } } } if self.groups.values().any(|g| g.args.contains(name)) { continue 'outer; } if let Some(a) = self.flags.iter().filter(|f| &f.name == name).next() { if self._validate_blacklist_required(a, matcher) { continue 'outer; } } else if let Some(a) = self.opts.iter().filter(|o| &o.name == name).next() { if self._validate_blacklist_required(a, matcher) { continue 'outer; } } else if let Some(a) = self.positionals.values().filter(|p| &p.name == name).next() { if self._validate_blacklist_required(a, matcher) { continue 'outer; } } let err = if self.settings.is_set(AppSettings::ArgRequiredElseHelp) && matcher.is_empty() { self._help().unwrap_err() } else { Error::missing_required_argument( &*self.get_required_from(&*self.required.iter().map(|&r| &*r).collect::>(), Some(matcher)) .iter() .fold(String::new(), |acc, s| acc + &format!("\n\t{}", Format::Error(s))[..]), &*self.create_current_usage(matcher)) }; return Err(err); } Ok(()) } fn _validate_blacklist_required(&self, a: &A, matcher: &ArgMatcher) -> bool where A: AnyArg<'a, 'b> { if let Some(bl) = a.blacklist() { for n in bl.iter() { if matcher.contains(n) { return true; } else if self.groups .get(n) .map_or(false, |g| g.args.iter().any(|an| matcher.contains(an))) { return true; } } } false } fn did_you_mean_error(&self, arg: &str, matcher: &mut ArgMatcher<'a>) -> ClapResult<()> { // Didn't match a flag or option...maybe it was a typo and close to one let suffix = suggestions::did_you_mean_suffix(arg, self.long_list.iter(), suggestions::DidYouMeanMessageStyle::LongFlag); // Add the arg to the matches to build a proper usage string if let Some(name) = suffix.1 { if let Some(opt) = self.opts .iter() .filter(|o| o.long.is_some() && o.long.unwrap() == name) .next() { self.groups_for_arg(&*opt.name).and_then(|grps| Some(matcher.inc_occurrences_of(&*grps))); matcher.insert(&*opt.name.clone()); } else if let Some(flg) = self.flags .iter() .filter(|f| f.long.is_some() && f.long.unwrap() == name) .next() { self.groups_for_arg(&*flg.name).and_then(|grps| Some(matcher.inc_occurrences_of(&*grps))); matcher.insert(&*flg.name.clone()); } } let used_arg = format!("--{}", arg); Err(Error::unknown_argument(&*used_arg, &*suffix.0, &*self.create_current_usage(matcher))) } // Creates a usage string if one was not provided by the user manually. This happens just // after all arguments were parsed, but before any subcommands have been parsed // (so as to give subcommands their own usage recursively) fn create_usage(&self, used: &[&str]) -> String { debugln!("fn=create_usage;"); let mut usage = String::with_capacity(75); usage.push_str("USAGE:\n\t"); if let Some(u) = self.meta.usage_str { usage.push_str(&*u); } else if !used.is_empty() { self.smart_usage(&mut usage, used); } else { usage.push_str(&*self.meta.usage .as_ref() .unwrap_or(self.meta.bin_name .as_ref() .unwrap_or(&self.meta.name))); let reqs: Vec<&str> = self.required().map(|r| &**r).collect(); let req_string = self.get_required_from(&reqs, None) .iter() .fold(String::new(), |a, s| a + &format!(" {}", s)[..]); if !self.has_flags() && !self.is_set(AppSettings::UnifiedHelpMessage) { usage.push_str(" [FLAGS]"); } else { usage.push_str(" [OPTIONS]"); } if !self.is_set(AppSettings::UnifiedHelpMessage) && !self.has_opts() && self.opts.iter().any(|a| !a.settings.is_set(ArgSettings::Required)) { usage.push_str(" [OPTIONS]"); } usage.push_str(&req_string[..]); // places a '--' in the usage string if there are args and options // supporting multiple values if !self.has_positionals() && (self.opts.iter().any(|a| a.settings.is_set(ArgSettings::Multiple)) || self.positionals.values().any(|a| a.settings.is_set(ArgSettings::Multiple))) && !self.opts.iter().any(|a| a.settings.is_set(ArgSettings::Required)) && self.has_subcommands() { usage.push_str(" [--]") } if !self.has_positionals() && self.positionals.values().any(|a| !a.settings.is_set(ArgSettings::Required)) { usage.push_str(" [ARGS]"); } if !self.has_subcommands() && !self.is_set(AppSettings::SubcommandRequired) { usage.push_str(" [SUBCOMMAND]"); } else if self.is_set(AppSettings::SubcommandRequired) && !self.has_subcommands() { usage.push_str(" "); } } usage.shrink_to_fit(); usage } // Creates a context aware usage string, or "smart usage" from currently used // args, and requirements fn smart_usage(&self, usage: &mut String, used: &[&str]) { let mut hs: Vec<&str> = self.required().map(|s| &**s).collect(); for n in used { hs.push(n); } let r_string = self.get_required_from(&hs, None) .iter() .fold(String::new(), |acc, s| acc + &format!(" {}", s)[..]); usage.push_str(&self.meta.usage.as_ref() .unwrap_or(self.meta.bin_name.as_ref().unwrap_or(&self.meta.name))[..]); usage.push_str(&*r_string); if self.is_set(AppSettings::SubcommandRequired) { usage.push_str(" "); } } // Prints the version to the user and exits if quit=true fn print_version(&self, w: &mut W) -> ClapResult<()> { try!(self.write_version(w)); w.flush().map_err(Error::from) } fn write_version(&self, w: &mut W) -> io::Result<()> { if let Some(bn) = self.meta.bin_name.as_ref() { if bn.contains(" ") { // Incase we're dealing with subcommands i.e. git mv is translated to git-mv writeln!(w, "{} {}", bn.replace(" ", "-"), self.meta.version.unwrap_or("".into())) } else { writeln!(w, "{} {}", &self.meta.name[..], self.meta.version.unwrap_or("".into())) } } else { writeln!(w, "{} {}", &self.meta.name[..], self.meta.version.unwrap_or("".into())) } } pub fn print_help(&self) -> ClapResult<()> { let out = io::stdout(); let mut buf_w = BufWriter::new(out.lock()); self.write_help(&mut buf_w) } pub fn write_help(&self, w: &mut W) -> ClapResult<()> { if let Some(h) = self.meta.help_str { return writeln!(w, "{}", h).map_err(Error::from); } // Print the version try!(self.write_version(w)); if let Some(author) = self.meta.author { try!(write!(w, "{}\n", author)); } if let Some(about) = self.meta.about { try!(write!(w, "{}\n", about)); } try!(write!(w, "\n{}", self.create_usage(&[]))); let flags = !self.has_flags(); let pos = !self.has_positionals(); let opts = !self.has_opts(); let subcmds = !self.has_subcommands(); let unified_help = self.is_set(AppSettings::UnifiedHelpMessage); let mut longest_flag = 0; for fl in self.flags.iter() .filter(|f| f.long.is_some() && !f.settings.is_set(ArgSettings::Hidden)) .map(|a| a.to_string().len()) { if fl > longest_flag { longest_flag = fl; } } let mut longest_opt = 0; for ol in self.opts.iter() .filter(|o| !o.settings.is_set(ArgSettings::Hidden)) .map(|a| a.to_string().len()) { if ol > longest_opt { longest_opt = ol; } } let mut longest_pos = 0; for pl in self.positionals .values() .filter(|p| !p.settings.is_set(ArgSettings::Hidden)) .map(|f| f.to_string().len()) { if pl > longest_pos { longest_pos = pl; } } let mut longest_sc = 0; for scl in self.subcommands .iter() .filter(|s| !s.0.is_set(AppSettings::Hidden)) .map(|s| s.0.meta.name.len()) { if scl > longest_sc { longest_sc = scl; } } if flags || opts || pos || subcmds { try!(write!(w, "\n")); } let tab = " "; let longest = if !unified_help || longest_opt == 0 { longest_flag } else { longest_opt }; if unified_help && (flags || opts) { try!(write!(w, "\nOPTIONS:\n")); let mut combined = BTreeMap::new(); for f in self.flags.iter().filter(|f| !f.settings.is_set(ArgSettings::Hidden)) { let mut v = vec![]; try!(f.write_help(&mut v, tab, longest)); combined.insert(f.name, v); } for o in self.opts.iter().filter(|o| !o.settings.is_set(ArgSettings::Hidden)) { let mut v = vec![]; try!(o.write_help(&mut v, tab, longest)); combined.insert(o.name, v); } for (_, a) in combined { // Only valid UTF-8 is supported, so panicing on invalid UTF-8 is ok try!(write!(w, "{}", unsafe { String::from_utf8_unchecked(a) })); } } else { if flags { try!(write!(w, "\nFLAGS:\n")); for (_, f) in self.flags.iter() .filter(|f| !f.settings.is_set(ArgSettings::Hidden)) .map(|f| (f.name, f)) .collect::>() { try!(f.write_help(w, tab, longest)); } } if opts { try!(write!(w, "\nOPTIONS:\n")); for (_, o) in self.opts.iter() .filter(|o| !o.settings.is_set(ArgSettings::Hidden)) .map(|o| (o.name, o)) .collect::>() { try!(o.write_help(w, tab, longest_opt)); } } } if pos { try!(write!(w, "\nARGS:\n")); for v in self.positionals.values() .filter(|p| !p.settings.is_set(ArgSettings::Hidden)) { try!(v.write_help(w, tab, longest_pos)); } } if subcmds { try!(write!(w, "\nSUBCOMMANDS:\n")); for (name, sc) in self.subcommands.iter() .filter(|s| !s.0.is_set(AppSettings::Hidden)) .map(|s| (&s.0.meta.name[..], s)) .collect::>() { try!(write!(w, "{}{}", tab, name)); write_spaces!((longest_sc + 4) - (name.len()), w); if let Some(a) = sc.0.meta.about { if a.contains("{n}") { let mut ab = a.split("{n}"); while let Some(part) = ab.next() { try!(write!(w, "{}\n", part)); write_spaces!(longest_sc + 8, w); try!(write!(w, "{}", ab.next().unwrap_or(""))); } } else { try!(write!(w, "{}", a)); } } try!(write!(w, "\n")); } } if let Some(h) = self.meta.more_help { try!(write!(w, "\n{}", h)); } w.flush().map_err(Error::from) } }