Default values trigger conflicts no more (#1605)

src/parse/arg_matcher.rs

@@ -6,7 +6,7 @@ use std::ops::Deref;
 
 // Internal
 use crate::build::{Arg, ArgSettings};
-use crate::parse::{ArgMatches, MatchedArg, SubCommand};
+use crate::parse::{ArgMatches, MatchedArg, SubCommand, ValueType};
 use crate::util::Id;
 
 #[derive(Debug)]
@@ -136,20 +136,22 @@ impl ArgMatcher {
         self.insert(arg);
     }
 
-    pub(crate) fn add_val_to(&mut self, arg: &Id, val: OsString) {
+    pub(crate) fn add_val_to(&mut self, arg: &Id, val: OsString, ty: ValueType) {
         let ma = self.entry(arg).or_insert(MatchedArg {
             occurs: 0, // @TODO @question Shouldn't this be 1 if we're already adding a value to this arg?
+            ty,
             indices: Vec::with_capacity(1),
             vals: Vec::with_capacity(1),
         });
         ma.vals.push(val);
     }
 
-    pub(crate) fn add_index_to(&mut self, arg: &Id, idx: usize) {
+    pub(crate) fn add_index_to(&mut self, arg: &Id, idx: usize, ty: ValueType) {
         let ma = self.entry(arg).or_insert(MatchedArg {
             occurs: 0,
             indices: Vec::with_capacity(1),
             vals: Vec::new(),
+            ty,
         });
         ma.indices.push(idx);
     }

src/parse/matches/matched_arg.rs

@@ -1,9 +1,18 @@
 // Std
 use std::ffi::{OsStr, OsString};
 
+// TODO: Maybe make this public?
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub(crate) enum ValueType {
+    EnvVariable,
+    CommandLine,
+    DefaultValue,
+}
+
 #[derive(Debug, Clone)]
 pub(crate) struct MatchedArg {
     pub(crate) occurs: u64,
+    pub(crate) ty: ValueType,
     pub(crate) indices: Vec<usize>,
     pub(crate) vals: Vec<OsString>,
 }
@@ -12,6 +21,7 @@ impl Default for MatchedArg {
     fn default() -> Self {
         MatchedArg {
             occurs: 1,
+            ty: ValueType::CommandLine,
             indices: Vec::new(),
             vals: Vec::new(),
         }

src/parse/matches/mod.rs

@@ -2,7 +2,7 @@ mod arg_matches;
 mod matched_arg;
 pub mod subcommand;
 
-pub(crate) use self::matched_arg::MatchedArg;
+pub(crate) use self::matched_arg::{MatchedArg, ValueType};
 
 pub use self::arg_matches::{ArgMatches, OsValues, Values};
 pub use self::subcommand::SubCommand;

src/parse/mod.rs

@@ -7,7 +7,11 @@ mod parser;
 mod validator;
 
 pub(crate) use self::parser::{Input, ParseResult, Parser};
-pub(crate) use self::{arg_matcher::ArgMatcher, matches::MatchedArg, validator::Validator};
+pub(crate) use self::{
+    arg_matcher::ArgMatcher,
+    matches::{MatchedArg, ValueType},
+    validator::Validator,
+};
 
 pub use self::matches::ArgMatches;
 pub use self::matches::{OsValues, SubCommand, Values};

src/parse/parser.rs

@@ -13,8 +13,8 @@ use crate::parse::errors::Error as ClapError;
 use crate::parse::errors::ErrorKind;
 use crate::parse::errors::Result as ClapResult;
 use crate::parse::features::suggestions;
-use crate::parse::Validator;
 use crate::parse::{ArgMatcher, SubCommand};
+use crate::parse::{Validator, ValueType};
 use crate::util::{termcolor::ColorChoice, ArgStr, ChildGraph, Id};
 use crate::INTERNAL_ERROR_MSG;
 use crate::INVALID_UTF8;
@@ -496,7 +496,12 @@ where
                     // Check to see if parsing a value from a previous arg
 
                     // get the option so we can check the settings
-                    needs_val_of = self.add_val_to_arg(&self.app[&id], &arg_os, matcher)?;
+                    needs_val_of = self.add_val_to_arg(
+                        &self.app[&id],
+                        &arg_os,
+                        matcher,
+                        ValueType::CommandLine,
+                    )?;
                     // get the next value from the iterator
                     continue;
                 }
@@ -622,7 +627,7 @@ where
                 }
 
                 self.seen.push(p.id.clone());
-                self.add_val_to_arg(p, &arg_os, matcher)?;
+                self.add_val_to_arg(p, &arg_os, matcher, ValueType::CommandLine)?;
 
                 matcher.inc_occurrence_of(&p.id);
                 for grp in groups_for_arg!(self.app, &p.id) {
@@ -660,7 +665,7 @@ where
                             self.app.color(),
                         )?);
                     }
-                    sc_m.add_val_to(&Id::empty_hash(), v.to_os_string());
+                    sc_m.add_val_to(&Id::empty_hash(), v.to_os_string(), ValueType::CommandLine);
                 }
 
                 matcher.subcommand(SubCommand {
@@ -1264,7 +1269,7 @@ where
                 fv,
                 fv.starts_with("=")
             );
-            self.add_val_to_arg(opt, &v, matcher)?;
+            self.add_val_to_arg(opt, &v, matcher, ValueType::CommandLine)?;
         } else if needs_eq && !(empty_vals || min_vals_zero) {
             debug!("None, but requires equals...Error");
             return Err(ClapError::empty_value(
@@ -1301,6 +1306,7 @@ where
         arg: &Arg<'b>,
         val: &ArgStr<'_>,
         matcher: &mut ArgMatcher,
+        ty: ValueType,
     ) -> ClapResult<ParseResult> {
         debug!("Parser::add_val_to_arg; arg={}, val={:?}", arg.name, val);
         debug!(
@@ -1311,11 +1317,11 @@ where
         if !(self.is_set(AS::TrailingValues) && self.is_set(AS::DontDelimitTrailingValues)) {
             if let Some(delim) = arg.val_delim {
                 if val.is_empty() {
-                    Ok(self.add_single_val_to_arg(arg, val, matcher)?)
+                    Ok(self.add_single_val_to_arg(arg, val, matcher, ty)?)
                 } else {
                     let mut iret = ParseResult::ValuesDone(arg.id.clone());
                     for v in val.split(delim) {
-                        iret = self.add_single_val_to_arg(arg, &v, matcher)?;
+                        iret = self.add_single_val_to_arg(arg, &v, matcher, ty)?;
                     }
                     // If there was a delimiter used, we're not looking for more values
                     if val.contains_char(delim) || arg.is_set(ArgSettings::RequireDelimiter) {
@@ -1324,10 +1330,10 @@ where
                     Ok(iret)
                 }
             } else {
-                self.add_single_val_to_arg(arg, val, matcher)
+                self.add_single_val_to_arg(arg, val, matcher, ty)
             }
         } else {
-            self.add_single_val_to_arg(arg, val, matcher)
+            self.add_single_val_to_arg(arg, val, matcher, ty)
         }
     }
 
@@ -1336,6 +1342,7 @@ where
         arg: &Arg<'b>,
         v: &ArgStr<'_>,
         matcher: &mut ArgMatcher,
+        ty: ValueType,
     ) -> ClapResult<ParseResult> {
         debug!("Parser::add_single_val_to_arg: adding val...{:?}", v);
 
@@ -1349,12 +1356,12 @@ where
             }
         }
 
-        matcher.add_val_to(&arg.id, v.to_os_string());
+        matcher.add_val_to(&arg.id, v.to_os_string(), ty);
-        matcher.add_index_to(&arg.id, self.cur_idx.get());
+        matcher.add_index_to(&arg.id, self.cur_idx.get(), ty);
 
         // Increment or create the group "args"
         for grp in groups_for_arg!(self.app, &arg.id) {
-            matcher.add_val_to(&grp, v.to_os_string());
+            matcher.add_val_to(&grp, v.to_os_string(), ty);
         }
 
         if matcher.needs_more_vals(arg) {
@@ -1367,7 +1374,7 @@ where
         debug!("Parser::parse_flag");
 
         matcher.inc_occurrence_of(&flag.id);
-        matcher.add_index_to(&flag.id, self.cur_idx.get());
+        matcher.add_index_to(&flag.id, self.cur_idx.get(), ValueType::CommandLine);
         // Increment or create the group "args"
         for grp in groups_for_arg!(self.app, &flag.id) {
             matcher.inc_occurrence_of(&grp);
@@ -1453,18 +1460,18 @@ where
 
         for o in opts!(self.app) {
             debug!("Parser::add_defaults:iter:{}:", o.name);
-            self.add_value(o, matcher)?;
+            self.add_value(o, matcher, ValueType::DefaultValue)?;
         }
 
         for p in positionals!(self.app) {
             debug!("Parser::add_defaults:iter:{}:", p.name);
-            self.add_value(p, matcher)?;
+            self.add_value(p, matcher, ValueType::DefaultValue)?;
         }
 
         Ok(())
     }
 
-    fn add_value(&self, arg: &Arg<'b>, matcher: &mut ArgMatcher) -> ClapResult<()> {
+    fn add_value(&self, arg: &Arg<'b>, matcher: &mut ArgMatcher, ty: ValueType) -> ClapResult<()> {
         if let Some(ref vm) = arg.default_vals_ifs {
             debug!("Parser::add_value: has conditional defaults");
 
@@ -1482,7 +1489,7 @@ where
                     };
 
                     if add {
-                        self.add_val_to_arg(arg, &ArgStr::new(default), matcher)?;
+                        self.add_val_to_arg(arg, &ArgStr::new(default), matcher, ty)?;
                         done = true;
                         break;
                     }
@@ -1510,7 +1517,7 @@ where
                 );
 
                 for val in vals {
-                    self.add_val_to_arg(arg, &ArgStr::new(val), matcher)?;
+                    self.add_val_to_arg(arg, &ArgStr::new(val), matcher, ty)?;
                 }
             } else if matcher.get(&arg.id).is_some() {
                 debug!("Parser::add_value:iter:{}: has user defined vals", arg.name);
@@ -1520,7 +1527,7 @@ where
                 debug!("Parser::add_value:iter:{}: wasn't used", arg.name);
 
                 for val in vals {
-                    self.add_val_to_arg(arg, &ArgStr::new(val), matcher)?;
+                    self.add_val_to_arg(arg, &ArgStr::new(val), matcher, ty)?;
                 }
             }
         } else {
@@ -1541,7 +1548,7 @@ where
             if matcher.get(&a.id).map_or(true, |a| a.occurs == 0) {
                 if let Some(ref val) = a.env {
                     if let Some(ref val) = val.1 {
-                        self.add_val_to_arg(a, &ArgStr::new(val), matcher)?;
+                        self.add_val_to_arg(a, &ArgStr::new(val), matcher, ValueType::EnvVariable)?;
                     }
                 }
             }

src/parse/validator.rs

@@ -4,7 +4,7 @@ use crate::build::{Arg, ArgSettings};
 use crate::output::Usage;
 use crate::parse::errors::Result as ClapResult;
 use crate::parse::errors::{Error, ErrorKind};
-use crate::parse::{ArgMatcher, MatchedArg, ParseResult, Parser};
+use crate::parse::{ArgMatcher, MatchedArg, ParseResult, Parser, ValueType};
 use crate::util::{ChildGraph, Id};
 use crate::INTERNAL_ERROR_MSG;
 use crate::INVALID_UTF8;
@@ -277,6 +277,17 @@ impl<'b, 'c, 'z> Validator<'b, 'c, 'z> {
         debug!("Validator::gather_conflicts");
         for name in matcher.arg_names() {
             debug!("Validator::gather_conflicts:iter:{:?}", name);
+            // if arg is "present" only because it got default value
+            // it doesn't conflict with anything
+            //
+            // TODO: @refactor Do it in a more elegant way
+            if matcher
+                .get(name)
+                .map_or(false, |a| a.ty == ValueType::DefaultValue)
+            {
+                continue;
+            }
+
             if let Some(arg) = self.p.app.find(name) {
                 // Since an arg was used, every arg it conflicts with is added to the conflicts
                 if let Some(ref bl) = arg.blacklist {