Get $nu.config-path and $nu.env-path from EngineState (#6366)

* Get `$nu.config-path` and `$nu.env-path` from `EngineState`

Signed-off-by: nibon7 <nibon7@163.com>

* replace tuple with hashmap

Signed-off-by: nibon7 <nibon7@163.com>

* refactor set_config_path

Signed-off-by: nibon7 <nibon7@163.com>

Signed-off-by: nibon7 <nibon7@163.com>

crates/nu-engine/src/eval.rs

@@ -1298,6 +1298,22 @@ pub fn eval_variable(
             let mut output_cols = vec![];
             let mut output_vals = vec![];
 
+            if let Some(path) = engine_state.get_config_path("config-path") {
+                output_cols.push("config-path".into());
+                output_vals.push(Value::String {
+                    val: path.to_string_lossy().to_string(),
+                    span,
+                });
+            }
+
+            if let Some(path) = engine_state.get_config_path("env-path") {
+                output_cols.push("env-path".into());
+                output_vals.push(Value::String {
+                    val: path.to_string_lossy().to_string(),
+                    span,
+                });
+            }
+
             if let Some(mut config_path) = nu_path::config_dir() {
                 config_path.push("nushell");
                 let mut env_config_path = config_path.clone();
@@ -1321,6 +1337,7 @@ pub fn eval_variable(
                     span,
                 });
 
+                if engine_state.get_config_path("config-path").is_none() {
                     config_path.push("config.nu");
 
                     output_cols.push("config-path".into());
@@ -1328,7 +1345,9 @@ pub fn eval_variable(
                         val: config_path.to_string_lossy().to_string(),
                         span,
                     });
+                }
 
+                if engine_state.get_config_path("env-path").is_none() {
                     env_config_path.push("env.nu");
 
                     output_cols.push("env-path".into());
@@ -1336,6 +1355,7 @@ pub fn eval_variable(
                         val: env_config_path.to_string_lossy().to_string(),
                         span,
                     });
+                }
 
                 loginshell_path.push("login.nu");
 

crates/nu-protocol/src/engine/engine_state.rs

@@ -76,6 +76,7 @@ pub struct EngineState {
     pub plugin_signatures: Option<PathBuf>,
     #[cfg(not(windows))]
     sig_quit: Option<Arc<AtomicBool>>,
+    config_path: HashMap<String, PathBuf>,
 }
 
 pub const NU_VARIABLE_ID: usize = 0;
@@ -113,6 +114,7 @@ impl EngineState {
             plugin_signatures: None,
             #[cfg(not(windows))]
             sig_quit: None,
+            config_path: HashMap::new(),
         }
     }
 
@@ -753,6 +755,14 @@ impl EngineState {
     pub fn set_sig_quit(&mut self, sig_quit: Arc<AtomicBool>) {
         self.sig_quit = Some(sig_quit)
     }
+
+    pub fn set_config_path(&mut self, key: &str, val: PathBuf) {
+        self.config_path.insert(key.to_string(), val);
+    }
+
+    pub fn get_config_path(&self, key: &str) -> Option<&PathBuf> {
+        self.config_path.get(key)
+    }
 }
 
 /// A temporary extension to the global state. This handles bridging between the global state and the

src/main.rs

@@ -18,6 +18,7 @@ use nu_cli::{
 use nu_command::{create_default_context, BufferedReader};
 use nu_engine::{get_full_help, CallExt};
 use nu_parser::{escape_for_script_arg, escape_quote_string, parse};
+use nu_path::canonicalize_with;
 use nu_protocol::{
     ast::{Call, Expr, Expression},
     engine::{Command, EngineState, Stack, StateWorkingSet},
@@ -25,7 +26,7 @@ use nu_protocol::{
     Spanned, SyntaxShape, Value,
 };
 use nu_utils::stdout_write_all_and_flush;
-use std::cell::RefCell;
+use std::{cell::RefCell, path::Path};
 use std::{
     io::BufReader,
     sync::{
@@ -142,6 +143,24 @@ fn main() -> Result<()> {
         nu_system::signal::set_terminal_leader()
     }
 
+    if let Ok(ref args) = parsed_nu_cli_args {
+        set_config_path(
+            &mut engine_state,
+            &init_cwd,
+            "config.nu",
+            "config-path",
+            &args.config_file,
+        );
+
+        set_config_path(
+            &mut engine_state,
+            &init_cwd,
+            "env.nu",
+            "env-path",
+            &args.env_file,
+        );
+    }
+
     match parsed_nu_cli_args {
         Ok(binary_args) => {
             if let Some(t) = binary_args.threads {
@@ -690,3 +709,24 @@ fn set_is_perf_value(value: bool) {
         *new_value.borrow_mut() = value;
     });
 }
+
+fn set_config_path(
+    engine_state: &mut EngineState,
+    cwd: &Path,
+    default_config_name: &str,
+    key: &str,
+    config_file: &Option<Spanned<String>>,
+) {
+    let config_path = match config_file {
+        Some(s) => canonicalize_with(&s.item, cwd).ok(),
+        None => nu_path::config_dir().map(|mut p| {
+            p.push(config_files::NUSHELL_FOLDER);
+            p.push(default_config_name);
+            p
+        }),
+    };
+
+    if let Some(path) = config_path {
+        engine_state.set_config_path(key, path);
+    }
+}