Add canonicalization to source & use paths (#421)

Also added file path print to FileNotFound error

crates/nu-parser/src/errors.rs

@@ -187,7 +187,7 @@ pub enum ParseError {
     #[diagnostic(code(nu::parser::export_not_found), url(docsrs))]
     ExportNotFound(#[label = "could not find imports"] Span),
 
-    #[error("File not found")]
+    #[error("File not found: {0}")]
     #[diagnostic(code(nu::parser::file_not_found), url(docsrs))]
     FileNotFound(String),
 

crates/nu-parser/src/parse_keywords.rs

@@ -1,3 +1,4 @@
+use nu_path::canonicalize;
 use nu_protocol::{
     ast::{
         Block, Call, Expr, Expression, ImportPattern, ImportPatternHead, ImportPatternMember,
@@ -7,7 +8,6 @@ use nu_protocol::{
     span, Exportable, Overlay, Span, SyntaxShape, Type, CONFIG_VARIABLE_ID,
 };
 use std::collections::{HashMap, HashSet};
-use std::path::Path;
 
 use crate::{
     lex, lite_parse,
@@ -679,7 +679,7 @@ pub fn parse_use(
                 // TODO: Do not close over when loading module from file
                 // It could be a file
                 if let Ok(module_filename) = String::from_utf8(import_pattern.head.name) {
-                    let module_path = Path::new(&module_filename);
+                    if let Ok(module_path) = canonicalize(&module_filename) {
                         let module_name = if let Some(stem) = module_path.file_stem() {
                             stem.to_string_lossy().to_string()
                         } else {
@@ -718,6 +718,10 @@ pub fn parse_use(
                                 Some(ParseError::ModuleNotFound(spans[1])),
                             );
                         }
+                    } else {
+                        error = error.or(Some(ParseError::FileNotFound(module_filename)));
+                        (ImportPattern::new(), Overlay::new())
+                    }
                 } else {
                     return (
                         garbage_statement(spans),
@@ -990,6 +994,7 @@ pub fn parse_source(
     working_set: &mut StateWorkingSet,
     spans: &[Span],
 ) -> (Statement, Option<ParseError>) {
+    let mut error = None;
     let name = working_set.get_span_contents(spans[0]);
 
     if name == b"source" {
@@ -998,17 +1003,14 @@ pub fn parse_source(
             // Some of the others (`parse_let`) use it, some of them (`parse_hide`) don't.
             let (call, call_span, err) =
                 parse_internal_call(working_set, spans[0], &spans[1..], decl_id);
+            error = error.or(err);
 
             // Command and one file name
             if spans.len() >= 2 {
                 let name_expr = working_set.get_span_contents(spans[1]);
                 if let Ok(filename) = String::from_utf8(name_expr.to_vec()) {
-                    let source_file = Path::new(&filename);
-
-                    let path = source_file;
-                    let contents = std::fs::read(path);
-
-                    if let Ok(contents) = contents {
+                    if let Ok(path) = canonicalize(&filename) {
+                        if let Ok(contents) = std::fs::read(&path) {
                             // This will load the defs from the file into the
                             // working set, if it was a successful parse.
                             let (block, err) = parse(
@@ -1056,6 +1058,9 @@ pub fn parse_source(
                                 );
                             }
                         }
+                    } else {
+                        error = error.or(Some(ParseError::FileNotFound(filename)));
+                    }
                 } else {
                     return (
                         garbage_statement(spans),
@@ -1070,7 +1075,7 @@ pub fn parse_source(
                     ty: Type::Unknown,
                     custom_completion: None,
                 }])),
-                err,
+                error,
             );
         }
     }
@@ -1090,7 +1095,6 @@ pub fn parse_register(
 ) -> (Statement, Option<ParseError>) {
     use std::{path::PathBuf, str::FromStr};
 
-    use nu_path::canonicalize;
     use nu_plugin::plugin::{get_signature, PluginDeclaration};
     use nu_protocol::Signature;
 

crates/nu-protocol/src/ast/import_pattern.rs

@@ -24,6 +24,17 @@ pub struct ImportPattern {
 }
 
 impl ImportPattern {
+    pub fn new() -> Self {
+        ImportPattern {
+            head: ImportPatternHead {
+                name: vec![],
+                span: Span::unknown(),
+            },
+            members: vec![],
+            hidden: HashSet::new(),
+        }
+    }
+
     pub fn span(&self) -> Span {
         let mut spans = vec![self.head.span];
 
@@ -50,3 +61,9 @@ impl ImportPattern {
         }
     }
 }
+
+impl Default for ImportPattern {
+    fn default() -> Self {
+        Self::new()
+    }
+}