fix(plugins): hand plugins paths in one form on Windows

Plugins got the project root, editor path, provider documents, code action edits, vcs-status roots and find-files results as D:\… while event paths from the UI use /, so Checkstyle could not find the project of a saved file. The host now converts every path it hands to plugins with ipc_path::to_ipc.

crates/ide-host/src/plugins/api.rs

@@ -2,6 +2,7 @@
 //! Capabilities were checked by the runtime before any of this runs.
 
 use super::{PluginEvent, PluginEventSink};
+use ide_core::ipc_path::to_ipc;
 use ide_core::{CancellationToken, TextEdit};
 use ide_extension::Package;
 use ide_language::ProgramPin;
@@ -419,7 +420,7 @@ impl HostApi for PluginApi {
         let info = repo.branch_info().map_err(failed)?;
         let changed = repo.status().map_err(failed)?.len();
         Ok(Some(RepositoryStatus {
-            root: repo.root().to_string_lossy().into_owned(),
+            root: to_ipc(repo.root()),
             branch: info.head,
             commit: info.head_commit,
             upstream: info.upstream,
@@ -467,7 +468,7 @@ impl HostApi for PluginApi {
             }
             let Ok(rel) = entry.path().strip_prefix(root) else { continue };
             if matcher.is_match(rel) {
-                out.push(entry.path().to_string_lossy().into_owned());
+                out.push(to_ipc(entry.path()));
             }
         }
         out.sort();

crates/ide-plugin/src/runtime.rs

@@ -13,6 +13,7 @@ use crate::types::{
 };
 use crate::wit_host::{bindings, providers_bindings, syntax_bindings, views_bindings};
 use ide_core::CancellationToken;
+use ide_core::ipc_path::to_ipc;
 use ide_extension::Capability;
 use parking_lot::Mutex;
 use std::path::Path;
@@ -935,12 +936,7 @@ fn location_from_wit(l: wit_types::Location) -> Location {
 }
 
 fn doc_to_wit(d: &ProviderDocument) -> wit_prov::Document {
-    wit_prov::Document {
-        path: d.path.to_string_lossy().into_owned(),
-        language: d.language.clone(),
-        version: d.version,
-        text: d.text.clone(),
-    }
+    wit_prov::Document { path: to_ipc(&d.path), language: d.language.clone(), version: d.version, text: d.text.clone() }
 }
 
 /// Resets the budgets for the next call: fuel, deadline, cancellation.
@@ -1012,7 +1008,7 @@ fn code_action_to_wit(a: &CodeAction) -> wit_prov::CodeAction {
             .edits
             .iter()
             .map(|(path, edits)| wit_prov::FileEdit {
-                path: path.to_string_lossy().into_owned(),
+                path: to_ipc(path),
                 edits: edits
                     .iter()
                     .map(|e| wit_types::TextEdit { range: range_to_wit(e.range), text: e.new_text.clone() })

crates/ide-plugin/src/wit_host.rs

@@ -5,6 +5,7 @@
 use crate::runtime::{StoreData, clip};
 use crate::sandbox;
 use crate::types::{EditorContext, EventKind, HostError, HttpRequest, NotificationLevel, StatusItem, net_host};
+use ide_core::ipc_path::to_ipc;
 use ide_extension::Capability;
 use std::path::{Path, PathBuf};
 use std::time::{Duration, Instant};
@@ -310,7 +311,8 @@ impl workspace::HostProject for StoreData {
         if let Err(e) = self.require(Capability::ProjectRead) {
             return Ok(Err(e));
         }
-        Ok(Ok(self.table.get(&this)?.root.to_string_lossy().into_owned()))
+        // Paths reach plugins in IPC form (`/` on Windows), as the UI's event paths do, so they compare as text.
+        Ok(Ok(to_ipc(&self.table.get(&this)?.root)))
     }
 
     fn read_file(&mut self, this: Resource<ProjectRes>, path: String) -> Fallible<String> {
@@ -346,7 +348,7 @@ impl editor::Host for StoreData {}
 
 impl editor::HostTextEditor for StoreData {
     fn path(&mut self, this: Resource<EditorRes>) -> wasmtime::Result<String> {
-        Ok(self.table.get(&this)?.ctx.path.to_string_lossy().into_owned())
+        Ok(to_ipc(&self.table.get(&this)?.ctx.path))
     }
 
     fn language(&mut self, this: Resource<EditorRes>) -> wasmtime::Result<String> {