Make IR the default evaluator (#13718)

# Description

Makes IR the default evaluator, in preparation to remove the non-IR
evaluator in a future release.

# User-Facing Changes

* Remove `NU_USE_IR` option
* Add `NU_DISABLE_IR` option
* IR is enabled unless `NU_DISABLE_IR` is set

# After Submitting
- [ ] release notes

crates/nu-command/src/formats/to/csv.rs

@@ -137,7 +137,7 @@ mod test {
 
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
 
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     use super::*;
 
@@ -157,6 +157,7 @@ mod test {
 
             working_set.add_decl(Box::new(ToCsv {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };

crates/nu-command/src/formats/to/json.rs

@@ -161,7 +161,7 @@ fn json_list(input: &[Value]) -> Result<Vec<nu_json::Value>, ShellError> {
 mod test {
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
 
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     use super::*;
 
@@ -182,6 +182,7 @@ mod test {
 
             working_set.add_decl(Box::new(ToJson {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };

crates/nu-command/src/formats/to/md.rs

@@ -335,7 +335,7 @@ fn get_padded_string(text: String, desired_length: usize, padding_character: cha
 
 #[cfg(test)]
 mod tests {
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     use super::*;
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
@@ -474,6 +474,7 @@ mod tests {
 
             working_set.add_decl(Box::new(ToMd {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };

crates/nu-command/src/formats/to/msgpack.rs

@@ -275,7 +275,7 @@ where
 mod test {
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
 
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     use super::*;
 
@@ -296,6 +296,7 @@ mod test {
 
             working_set.add_decl(Box::new(ToMsgpack {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };

crates/nu-command/src/formats/to/nuon.rs

@@ -107,7 +107,7 @@ mod test {
     use super::*;
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
 
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     #[test]
     fn test_examples() {
@@ -126,6 +126,7 @@ mod test {
 
             working_set.add_decl(Box::new(ToNuon {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };

crates/nu-command/src/formats/to/text.rs

@@ -144,7 +144,7 @@ fn update_metadata(metadata: Option<PipelineMetadata>) -> Option<PipelineMetadat
 mod test {
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
 
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     use super::*;
 
@@ -165,6 +165,7 @@ mod test {
 
             working_set.add_decl(Box::new(ToText {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };

crates/nu-command/src/formats/to/tsv.rs

@@ -102,7 +102,7 @@ fn to_tsv(
 mod test {
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
 
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     use super::*;
 
@@ -123,6 +123,7 @@ mod test {
 
             working_set.add_decl(Box::new(ToTsv {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };

crates/nu-command/src/formats/to/xml.rs

@@ -514,7 +514,7 @@ impl Job {
 mod test {
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
 
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     use super::*;
 
@@ -535,6 +535,7 @@ mod test {
 
             working_set.add_decl(Box::new(ToXml {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };

crates/nu-command/src/formats/to/yaml.rs

@@ -125,7 +125,7 @@ fn to_yaml(input: PipelineData, head: Span) -> Result<PipelineData, ShellError>
 mod test {
     use nu_cmd_lang::eval_pipeline_without_terminal_expression;
 
-    use crate::Metadata;
+    use crate::{Get, Metadata};
 
     use super::*;
 
@@ -146,6 +146,7 @@ mod test {
 
             working_set.add_decl(Box::new(ToYaml {}));
             working_set.add_decl(Box::new(Metadata {}));
+            working_set.add_decl(Box::new(Get {}));
 
             working_set.render()
         };