5 files changed, 47 insertions, 50 deletions

diff --git a/crates/assists/src/assist_context.rs b/crates/assists/src/assist_context.rs
index cd22cf17d..80cf9aba1 100644
--- a/crates/assists/src/assist_context.rs
+++ b/crates/assists/src/assist_context.rs
@@ -285,10 +285,9 @@ impl AssistBuilder {
         }
     }
     pub(crate) fn create_file(&mut self, dst: AnchoredPathBuf, content: impl Into<String>) {
-        let file_system_edit = FileSystemEdit::CreateFile { dst: dst.clone() };
+        let file_system_edit =
+            FileSystemEdit::CreateFile { dst: dst.clone(), initial_contents: content.into() };
         self.file_system_edits.push(file_system_edit);
-        self.edit_file(dst.anchor);
-        self.insert(TextSize::from(0), content)
     }
 
     fn finish(mut self) -> SourceChange {
diff --git a/crates/assists/src/tests.rs b/crates/assists/src/tests.rs
index 9002040ce..d18e566e6 100644
--- a/crates/assists/src/tests.rs
+++ b/crates/assists/src/tests.rs
@@ -107,47 +107,27 @@ fn check(handler: Handler, before: &str, expected: ExpectedResult, assist_label:
                 && source_change.file_system_edits.len() == 0;
             source_change.source_file_edits.sort_by_key(|it| it.file_id);
 
-            let mut created_file_ids = Vec::new();
             let mut buf = String::new();
-            for file_system_edit in source_change.file_system_edits.clone() {
-                match file_system_edit {
-                    FileSystemEdit::CreateFile { dst } => {
-                        created_file_ids.push(dst.anchor);
-                    }
-                    _ => (),
+            for source_file_edit in source_change.source_file_edits {
+                let mut text = db.file_text(source_file_edit.file_id).as_ref().to_owned();
+                source_file_edit.edit.apply(&mut text);
+                if !skip_header {
+                    let sr = db.file_source_root(source_file_edit.file_id);
+                    let sr = db.source_root(sr);
+                    let path = sr.path_for_file(&source_file_edit.file_id).unwrap();
+                    format_to!(buf, "//- {}\n", path)
                 }
+                buf.push_str(&text);
             }
 
-            for source_file_edit in source_change.source_file_edits {
-                if created_file_ids.contains(&source_file_edit.file_id) {
-                    let target_dst = source_change
-                        .file_system_edits
-                        .iter()
-                        .find_map(|f| match f {
-                            FileSystemEdit::CreateFile { dst } => {
-                                if dst.anchor == source_file_edit.file_id {
-                                    Some(&dst.path)
-                                } else {
-                                    None
-                                }
-                            }
-                            _ => None,
-                        })
-                        .unwrap();
-                    format_to!(buf, "//- {}\n", target_dst);
-                    let mut text = String::new();
-                    source_file_edit.edit.apply(&mut text);
-                    buf.push_str(&text);
-                } else {
-                    let mut text = db.file_text(source_file_edit.file_id).as_ref().to_owned();
-                    source_file_edit.edit.apply(&mut text);
-                    if !skip_header {
-                        let sr = db.file_source_root(source_file_edit.file_id);
-                        let sr = db.source_root(sr);
-                        let path = sr.path_for_file(&source_file_edit.file_id).unwrap();
-                        format_to!(buf, "//- {}\n", path)
+            for file_system_edit in source_change.file_system_edits.clone() {
+                match file_system_edit {
+                    FileSystemEdit::CreateFile { dst, initial_contents } => {
+                        let target_dst = dst.path;
+                        format_to!(buf, "//- {}\n", target_dst);
+                        buf.push_str(&initial_contents);
                     }
-                    buf.push_str(&text);
+                    _ => (),
                 }
             }
 
diff --git a/crates/ide/src/diagnostics/fixes.rs b/crates/ide/src/diagnostics/fixes.rs
index e8b896623..d79f5c170 100644
--- a/crates/ide/src/diagnostics/fixes.rs
+++ b/crates/ide/src/diagnostics/fixes.rs
@@ -40,6 +40,7 @@ impl DiagnosticWithFix for UnresolvedModule {
                     anchor: self.file.original_file(sema.db),
                     path: self.candidate.clone(),
                 },
+                initial_contents: "".to_string(),
             }
             .into(),
             unresolved_module.syntax().text_range(),
diff --git a/crates/ide_db/src/source_change.rs b/crates/ide_db/src/source_change.rs
index e87d98dad..10c0abdac 100644
--- a/crates/ide_db/src/source_change.rs
+++ b/crates/ide_db/src/source_change.rs
@@ -44,7 +44,7 @@ impl From<Vec<SourceFileEdit>> for SourceChange {
 
 #[derive(Debug, Clone)]
 pub enum FileSystemEdit {
-    CreateFile { dst: AnchoredPathBuf },
+    CreateFile { dst: AnchoredPathBuf, initial_contents: String },
     MoveFile { src: FileId, dst: AnchoredPathBuf },
 }
 
diff --git a/crates/rust-analyzer/src/to_proto.rs b/crates/rust-analyzer/src/to_proto.rs
index e0561b5a7..5a1ae96aa 100644
--- a/crates/rust-analyzer/src/to_proto.rs
+++ b/crates/rust-analyzer/src/to_proto.rs
@@ -634,30 +634,47 @@ pub(crate) fn snippet_text_document_edit(
     Ok(lsp_ext::SnippetTextDocumentEdit { text_document, edits })
 }
 
-pub(crate) fn resource_op(
+pub(crate) fn snippet_text_document_ops(
     snap: &GlobalStateSnapshot,
     file_system_edit: FileSystemEdit,
-) -> lsp_types::ResourceOp {
+) -> Vec<lsp_ext::SnippetDocumentChangeOperation> {
+    let mut ops = Vec::new();
     match file_system_edit {
-        FileSystemEdit::CreateFile { dst } => {
+        FileSystemEdit::CreateFile { dst, initial_contents } => {
             let uri = snap.anchored_path(&dst);
-            lsp_types::ResourceOp::Create(lsp_types::CreateFile {
-                uri,
+            let create_file = lsp_types::ResourceOp::Create(lsp_types::CreateFile {
+                uri: uri.clone(),
                 options: None,
                 annotation_id: None,
-            })
+            });
+            ops.push(lsp_ext::SnippetDocumentChangeOperation::Op(create_file));
+            if !initial_contents.is_empty() {
+                let text_document =
+                    lsp_types::OptionalVersionedTextDocumentIdentifier { uri, version: None };
+                let range = range(&LineIndex::new(""), TextRange::empty(TextSize::from(0)));
+                let text_edit = lsp_ext::SnippetTextEdit {
+                    range,
+                    new_text: initial_contents,
+                    insert_text_format: Some(lsp_types::InsertTextFormat::PlainText),
+                };
+                let edit_file =
+                    lsp_ext::SnippetTextDocumentEdit { text_document, edits: vec![text_edit] };
+                ops.push(lsp_ext::SnippetDocumentChangeOperation::Edit(edit_file));
+            }
         }
         FileSystemEdit::MoveFile { src, dst } => {
             let old_uri = snap.file_id_to_url(src);
             let new_uri = snap.anchored_path(&dst);
-            lsp_types::ResourceOp::Rename(lsp_types::RenameFile {
+            let rename_file = lsp_types::ResourceOp::Rename(lsp_types::RenameFile {
                 old_uri,
                 new_uri,
                 options: None,
                 annotation_id: None,
-            })
+            });
+            ops.push(lsp_ext::SnippetDocumentChangeOperation::Op(rename_file))
         }
     }
+    ops
 }
 
 pub(crate) fn snippet_workspace_edit(
@@ -666,8 +683,8 @@ pub(crate) fn snippet_workspace_edit(
 ) -> Result<lsp_ext::SnippetWorkspaceEdit> {
     let mut document_changes: Vec<lsp_ext::SnippetDocumentChangeOperation> = Vec::new();
     for op in source_change.file_system_edits {
-        let op = resource_op(&snap, op);
-        document_changes.push(lsp_ext::SnippetDocumentChangeOperation::Op(op));
+        let ops = snippet_text_document_ops(snap, op);
+        document_changes.extend_from_slice(&ops);
     }
     for edit in source_change.source_file_edits {
         let edit = snippet_text_document_edit(&snap, source_change.is_snippet, edit)?;