fix(config): do not canonicalize config file path before loading (#19436)

I'm unsure why we canonicalize the config file path when loading and the
canonicalization is causing issues in #19431 because everything in the
lsp is not canonicalized except the config file (actually, the config
file is only canonicalized when auto-discovered and not whens pecified).
We also don't canonicalize module paths when loading them.

Canonicalization was added in https://github.com/denoland/deno/pull/7621

2 files changed, 40 insertions, 53 deletions

diff --git a/cli/args/config_file.rs b/cli/args/config_file.rs
index 61f7778d9..328a6e574 100644
--- a/cli/args/config_file.rs
+++ b/cli/args/config_file.rs
@@ -2,7 +2,6 @@
 
 use crate::args::ConfigFlag;
 use crate::args::Flags;
-use crate::util::fs::canonicalize_path;
 use crate::util::path::specifier_parent;
 use crate::util::path::specifier_to_file_path;
 
@@ -709,6 +708,24 @@ impl ConfigFile {
     start: &Path,
     checked: &mut HashSet<PathBuf>,
   ) -> Result<Option<ConfigFile>, AnyError> {
+    fn is_skippable_err(e: &AnyError) -> bool {
+      if let Some(ioerr) = e.downcast_ref::<std::io::Error>() {
+        use std::io::ErrorKind::*;
+        match ioerr.kind() {
+          InvalidInput | PermissionDenied | NotFound => {
+            // ok keep going
+            true
+          }
+          _ => {
+            const NOT_A_DIRECTORY: i32 = 20;
+            cfg!(unix) && ioerr.raw_os_error() == Some(NOT_A_DIRECTORY)
+          }
+        }
+      } else {
+        false
+      }
+    }
+
     /// Filenames that Deno will recognize when discovering config.
     const CONFIG_FILE_NAMES: [&str; 2] = ["deno.json", "deno.jsonc"];
 
@@ -729,20 +746,11 @@ impl ConfigFile {
               log::debug!("Config file found at '{}'", f.display());
               return Ok(Some(cf));
             }
+            Err(e) if is_skippable_err(&e) => {
+              // ok, keep going
+            }
             Err(e) => {
-              if let Some(ioerr) = e.downcast_ref::<std::io::Error>() {
-                use std::io::ErrorKind::*;
-                match ioerr.kind() {
-                  InvalidInput | PermissionDenied | NotFound => {
-                    // ok keep going
-                  }
-                  _ => {
-                    return Err(e); // Unknown error. Stop.
-                  }
-                }
-              } else {
-                return Err(e); // Parse error or something else. Stop.
-              }
+              return Err(e);
             }
           }
         }
@@ -755,50 +763,31 @@ impl ConfigFile {
   pub fn read(config_path: &Path) -> Result<Self, AnyError> {
     debug_assert!(config_path.is_absolute());
 
-    // perf: Check if the config file exists before canonicalizing path.
-    if !config_path.exists() {
-      return Err(
-        std::io::Error::new(
-          std::io::ErrorKind::InvalidInput,
-          format!(
-            "Could not find the config file: {}",
-            config_path.to_string_lossy()
-          ),
-        )
-        .into(),
-      );
-    }
-
-    let config_path = canonicalize_path(config_path).map_err(|_| {
-      std::io::Error::new(
-        std::io::ErrorKind::InvalidInput,
-        format!(
-          "Could not find the config file: {}",
-          config_path.to_string_lossy()
-        ),
-      )
-    })?;
-    let config_specifier = ModuleSpecifier::from_file_path(&config_path)
-      .map_err(|_| {
+    let specifier =
+      ModuleSpecifier::from_file_path(config_path).map_err(|_| {
         anyhow!(
-          "Could not convert path to specifier. Path: {}",
+          "Could not convert config file path to specifier. Path: {}",
           config_path.display()
         )
       })?;
-    Self::from_specifier(config_specifier)
+    Self::from_specifier_and_path(specifier, config_path)
   }
 
   pub fn from_specifier(specifier: ModuleSpecifier) -> Result<Self, AnyError> {
-    let config_path = specifier_to_file_path(&specifier)?;
-    let config_text = match std::fs::read_to_string(config_path) {
-      Ok(text) => text,
-      Err(err) => bail!(
-        "Error reading config file {}: {}",
-        specifier,
-        err.to_string()
-      ),
-    };
-    Self::new(&config_text, specifier)
+    let config_path =
+      specifier_to_file_path(&specifier).with_context(|| {
+        format!("Invalid config file path for '{}'.", specifier)
+      })?;
+    Self::from_specifier_and_path(specifier, &config_path)
+  }
+
+  fn from_specifier_and_path(
+    specifier: ModuleSpecifier,
+    config_path: &Path,
+  ) -> Result<Self, AnyError> {
+    let text = std::fs::read_to_string(config_path)
+      .with_context(|| format!("Error reading config file '{}'.", specifier))?;
+    Self::new(&text, specifier)
   }
 
   pub fn new(text: &str, specifier: ModuleSpecifier) -> Result<Self, AnyError> {
diff --git a/cli/args/mod.rs b/cli/args/mod.rs
index 6dab0c973..d740b9ab0 100644
--- a/cli/args/mod.rs
+++ b/cli/args/mod.rs
@@ -396,8 +396,6 @@ fn discover_package_json(
   // `package.json` is ignored in bundle/compile/etc.
 
   if let Some(package_json_dir) = flags.package_json_search_dir(current_dir) {
-    let package_json_dir =
-      canonicalize_path_maybe_not_exists(&package_json_dir)?;
     return package_json::discover_from(&package_json_dir, maybe_stop_at);
   }