removed rustyline config duplication (#2306)

* removed rustyline config duplication
set other rustyline defaults if line_editor section doesn't exist
updated keyseq_timeout to -1 if emacs mode is chosen

* change checking rustyline config to if lets

* removed some unneccessary code

Cargo.lock

@@ -526,6 +526,16 @@ dependencies = [
  "time",
 ]
 
+[[package]]
+name = "chrono-tz"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "65d96be7c3e993c9ee4356442db24ba364c924b6b8331866be6b6952bfe74b9d"
+dependencies = [
+ "chrono",
+ "parse-zoneinfo",
+]
+
 [[package]]
 name = "clap"
 version = "2.33.1"
@@ -1050,6 +1060,19 @@ version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "134951f4028bdadb9b84baf4232681efbf277da25144b9b0ad65df75946c422b"
 
+[[package]]
+name = "dtparse"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9713da7ca51bcd8ecbaedbd6309110eb1ca930d2109ef595a125f84fa1bc608b"
+dependencies = [
+ "chrono",
+ "chrono-tz",
+ "lazy_static 1.4.0",
+ "num-traits 0.2.12",
+ "rust_decimal",
+]
+
 [[package]]
 name = "dunce"
 version = "1.0.1"
@@ -2585,6 +2608,7 @@ dependencies = [
  "derive-new",
  "directories 2.0.2",
  "dirs 2.0.2",
+ "dtparse",
  "dunce",
  "eml-parser",
  "encoding_rs",
@@ -2983,6 +3007,20 @@ dependencies = [
  "ptree",
 ]
 
+[[package]]
+name = "num"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8536030f9fea7127f841b45bb6243b27255787fb4eb83958aa1ef9d2fdc0c36"
+dependencies = [
+ "num-bigint",
+ "num-complex",
+ "num-integer",
+ "num-iter",
+ "num-rational",
+ "num-traits 0.2.12",
+]
+
 [[package]]
 name = "num-bigint"
 version = "0.2.6"
@@ -2995,6 +3033,16 @@ dependencies = [
  "serde 1.0.114",
 ]
 
+[[package]]
+name = "num-complex"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6b19411a9719e753aff12e5187b74d60d3dc449ec3f4dc21e3989c3f554bc95"
+dependencies = [
+ "autocfg",
+ "num-traits 0.2.12",
+]
+
 [[package]]
 name = "num-format"
 version = "0.4.0"
@@ -3034,6 +3082,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5c000134b5dbf44adc5cb772486d335293351644b801551abe8f75c84cfa4aef"
 dependencies = [
  "autocfg",
+ "num-bigint",
  "num-integer",
  "num-traits 0.2.12",
 ]
@@ -3287,6 +3336,15 @@ dependencies = [
  "winapi 0.3.9",
 ]
 
+[[package]]
+name = "parse-zoneinfo"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c705f256449c60da65e11ff6626e0c16a0a0b96aaa348de61376b249bc340f41"
+dependencies = [
+ "regex",
+]
+
 [[package]]
 name = "path-slash"
 version = "0.1.3"
@@ -3833,6 +3891,18 @@ dependencies = [
  "serde_derive",
 ]
 
+[[package]]
+name = "rust_decimal"
+version = "0.10.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a93c95e3d5c1d997e6e4ba9bda898f4e1d73934cd05510c972f10087d0ef00c1"
+dependencies = [
+ "byteorder",
+ "lazy_static 1.4.0",
+ "num",
+ "serde 1.0.114",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.16"

crates/nu-cli/src/cli.rs

@@ -561,6 +561,20 @@ pub fn set_rustyline_configuration() -> (Editor<Helper>, IndexMap<String, Value>
         Cmd::Move(Movement::ForwardWord(1, At::AfterEnd, Word::Vi)),
     );
 
+    // Let's set the defaults up front and then override them later if the user indicates
+    // defaults taken from here https://github.com/kkawakam/rustyline/blob/2fe886c9576c1ea13ca0e5808053ad491a6fe049/src/config.rs#L150-L167
+    rl.set_max_history_size(100);
+    rl.set_history_ignore_dups(true);
+    rl.set_history_ignore_space(false);
+    rl.set_completion_type(DEFAULT_COMPLETION_MODE);
+    rl.set_completion_prompt_limit(100);
+    rl.set_keyseq_timeout(-1);
+    rl.set_edit_mode(rustyline::config::EditMode::Emacs);
+    rl.set_auto_add_history(false);
+    rl.set_bell_style(rustyline::config::BellStyle::default());
+    rl.set_color_mode(rustyline::ColorMode::Enabled);
+    rl.set_tab_stop(8);
+
     if let Err(e) = crate::keybinding::load_keybindings(&mut rl) {
         println!("Error loading keybindings: {:?}", e);
     }
@@ -585,11 +599,9 @@ pub fn set_rustyline_configuration() -> (Editor<Helper>, IndexMap<String, Value>
             for (idx, value) in line_editor_vars.row_entries() {
                 match idx.as_ref() {
                     "max_history_size" => {
-                        let max_history_size = match value.as_u64() {
+                        if let Ok(max_history_size) = value.as_u64() {
-                            Ok(n) => n as usize,
+                            rl.set_max_history_size(max_history_size as usize);
-                            _ => 1000 as usize,
+                        }
-                        };
-                        rl.set_max_history_size(max_history_size as usize);
                     }
                     "history_duplicates" => {
                         // history_duplicates = match value.as_string() {
@@ -601,12 +613,14 @@ pub fn set_rustyline_configuration() -> (Editor<Helper>, IndexMap<String, Value>
                         //     }
                         //     _ => rustyline::config::HistoryDuplicates::AlwaysAdd,
                         // };
-                        let history_duplicates = value.as_bool().unwrap_or(true);
+                        if let Ok(history_duplicates) = value.as_bool() {
-                        rl.set_history_ignore_dups(history_duplicates);
+                            rl.set_history_ignore_dups(history_duplicates);
+                        }
                     }
                     "history_ignore_space" => {
-                        let history_ignore_space = value.as_bool().unwrap_or(true);
+                        if let Ok(history_ignore_space) = value.as_bool() {
-                        rl.set_history_ignore_space(history_ignore_space);
+                            rl.set_history_ignore_space(history_ignore_space);
+                        }
                     }
                     "completion_type" => {
                         let completion_type = match value.as_string() {
@@ -625,12 +639,14 @@ pub fn set_rustyline_configuration() -> (Editor<Helper>, IndexMap<String, Value>
                         rl.set_completion_type(completion_type);
                     }
                     "completion_prompt_limit" => {
-                        let completion_prompt_limit = value.as_u64().unwrap_or(1) as usize;
+                        if let Ok(completion_prompt_limit) = value.as_u64() {
-                        rl.set_completion_prompt_limit(completion_prompt_limit);
+                            rl.set_completion_prompt_limit(completion_prompt_limit as usize);
+                        }
                     }
                     "keyseq_timeout_ms" => {
-                        let keyseq_timeout_ms = value.as_u64().unwrap_or(500) as i32;
+                        if let Ok(keyseq_timeout_ms) = value.as_u64() {
-                        rl.set_keyseq_timeout(keyseq_timeout_ms);
+                            rl.set_keyseq_timeout(keyseq_timeout_ms as i32);
+                        }
                     }
                     "edit_mode" => {
                         let edit_mode = match value.as_string() {
@@ -641,10 +657,15 @@ pub fn set_rustyline_configuration() -> (Editor<Helper>, IndexMap<String, Value>
                             _ => rustyline::config::EditMode::Emacs,
                         };
                         rl.set_edit_mode(edit_mode);
+                        // Note: When edit_mode is Emacs, the keyseq_timeout_ms is set to -1
+                        // no matter what you may have configured. This is so that key chords
+                        // can be applied without having to do them in a given timeout. So,
+                        // it essentially turns off the keyseq timeout.
                     }
                     "auto_add_history" => {
-                        let auto_add_history = value.as_bool().unwrap_or(true);
+                        if let Ok(auto_add_history) = value.as_bool() {
-                        rl.set_auto_add_history(auto_add_history);
+                            rl.set_auto_add_history(auto_add_history);
+                        }
                     }
                     "bell_style" => {
                         let bell_style = match value.as_string() {
@@ -657,7 +678,7 @@ pub fn set_rustyline_configuration() -> (Editor<Helper>, IndexMap<String, Value>
                             Ok(s) if s.to_lowercase() == "visible" => {
                                 rustyline::config::BellStyle::Visible
                             }
-                            _ => rustyline::config::BellStyle::None,
+                            _ => rustyline::config::BellStyle::default(),
                         };
                         rl.set_bell_style(bell_style);
                     }
@@ -673,39 +694,14 @@ pub fn set_rustyline_configuration() -> (Editor<Helper>, IndexMap<String, Value>
                         rl.set_color_mode(color_mode);
                     }
                     "tab_stop" => {
-                        let tab_stop = value.as_u64().unwrap_or(4) as usize;
+                        if let Ok(tab_stop) = value.as_u64() {
-                        rl.set_tab_stop(tab_stop);
+                            rl.set_tab_stop(tab_stop as usize);
+                        }
                     }
                     _ => (),
                 }
             }
-        } else {
-            // if the line_editor config section doesn't exist, let's set some defaults
-            rl.set_max_history_size(1000);
-            rl.set_history_ignore_dups(true);
-            rl.set_history_ignore_space(false);
-            rl.set_completion_type(DEFAULT_COMPLETION_MODE);
-            rl.set_completion_prompt_limit(100);
-            rl.set_keyseq_timeout(500);
-            rl.set_edit_mode(rustyline::config::EditMode::Emacs);
-            rl.set_auto_add_history(false);
-            rl.set_bell_style(rustyline::config::BellStyle::None);
-            rl.set_color_mode(rustyline::ColorMode::Enabled);
-            rl.set_tab_stop(8);
         }
-    } else {
-        // if the config file itself doesn't exist, let's set some defaults
-        rl.set_max_history_size(1000);
-        rl.set_history_ignore_dups(true);
-        rl.set_history_ignore_space(false);
-        rl.set_completion_type(DEFAULT_COMPLETION_MODE);
-        rl.set_completion_prompt_limit(100);
-        rl.set_keyseq_timeout(500);
-        rl.set_edit_mode(rustyline::config::EditMode::Emacs);
-        rl.set_auto_add_history(false);
-        rl.set_bell_style(rustyline::config::BellStyle::None);
-        rl.set_color_mode(rustyline::ColorMode::Enabled);
-        rl.set_tab_stop(8);
     }
 
     // we are ok if history does not exist