Attempt to use existing line endings when replacing a file's contents post-compile

src/commands/compile.ts

@@ -19,7 +19,6 @@ import {
   cspAppsForUri,
   CurrentBinaryFile,
   currentFile,
-  CurrentFile,
   currentFileFromContent,
   CurrentTextFile,
   exportedUris,
@@ -231,7 +230,16 @@ export async function loadChanges(files: (CurrentTextFile | CurrentBinaryFile)[]
           const content = await api.getDoc(file.name, file.uri).then((data) => data.result.content);
           exportedUris.add(file.uri.toString()); // Set optimistically
           await vscode.workspace.fs
-            .writeFile(file.uri, Buffer.isBuffer(content) ? content : new TextEncoder().encode(content.join("\n")))
+            .writeFile(
+              file.uri,
+              Buffer.isBuffer(content)
+                ? content
+                : new TextEncoder().encode(
+                    content.join(
+                      ((<CurrentTextFile>file)?.eol ?? vscode.EndOfLine.LF) == vscode.EndOfLine.CRLF ? "\r\n" : "\n"
+                    )
+                  )
+            )
             .then(undefined, (e) => {
               // Save failed, so remove this URI from the set
               exportedUris.delete(file.uri.toString());
@@ -251,12 +259,15 @@ export async function loadChanges(files: (CurrentTextFile | CurrentBinaryFile)[]
   );
 }
 
-export async function compile(docs: CurrentFile[], flags?: string): Promise<any> {
+export async function compile(docs: (CurrentTextFile | CurrentBinaryFile)[], flags?: string): Promise<any> {
   const wsFolder = vscode.workspace.getWorkspaceFolder(docs[0].uri);
   const conf = vscode.workspace.getConfiguration("objectscript", wsFolder || docs[0].uri);
   flags = flags || conf.get("compileFlags");
   const api = new AtelierAPI(docs[0].uri);
   const docNames = docs.map((d) => d.name);
+  // Determine the line ending to use for other documents affected
+  // by compilation so we don't need to read their contents
+  const eol = (<CurrentTextFile>docs.find((d) => (<CurrentTextFile>d)?.eol))?.eol ?? vscode.EndOfLine.LF;
   return vscode.window
     .withProgress(
       {
@@ -284,9 +295,11 @@ export async function compile(docs: CurrentFile[], flags?: string): Promise<any>
                     name: f.name,
                     uri: u,
                     uniqueId: `${wsFolder.name}:${f.name}`,
-                    // These two keys aren't used by loadChanges()
+                    eol,
+                    // These three keys aren't used by loadChanges()
                     workspaceFolder: wsFolder.name,
                     fileName: u.fsPath,
+                    content: "",
                   });
                 });
               });
@@ -416,7 +429,7 @@ export async function namespaceCompile(askFlags = false): Promise<any> {
 }
 
 async function importFiles(files: vscode.Uri[], noCompile = false) {
-  const toCompile: CurrentFile[] = [];
+  const toCompile: (CurrentTextFile | CurrentBinaryFile)[] = [];
   const rateLimiter = new RateLimiter(50);
   await Promise.allSettled<void>(
     files.map((uri) =>

src/extension.ts

@@ -1297,7 +1297,7 @@ export async function activate(context: vscode.ExtensionContext): Promise<any> {
             wsEdit.replace(
               uri,
               new vscode.Range(0, 0, newContent.content.length + 1, 0),
-              newContent.content.join("\n"),
+              newContent.content.join(newContent.eol == vscode.EndOfLine.CRLF ? "\r\n" : "\n"),
               {
                 label: "ObjectScript autoAdjustName",
                 needsConfirmation: false,

src/providers/FileSystemProvider/FileSystemProvider.ts

@@ -68,8 +68,9 @@ export function generateFileContent(
   uri: vscode.Uri,
   fileName: string,
   sourceContent: Uint8Array
-): { content: string[]; enc: boolean } {
+): { content: string[]; enc: boolean; eol: vscode.EndOfLine } {
   const sourceLines = sourceContent.length ? new TextDecoder().decode(sourceContent).split("\n") : [];
+  const eol = sourceLines.length && sourceLines[0].slice(-1) == "\r" ? vscode.EndOfLine.CRLF : vscode.EndOfLine.LF;
   const fileExt = fileName.split(".").pop().toLowerCase();
   const csp = fileName.startsWith("/");
   if (fileExt === "cls" && !csp) {
@@ -108,6 +109,7 @@ export function generateFileContent(
     return {
       content,
       enc: false,
+      eol,
     };
   } else if (["int", "inc", "mac"].includes(fileExt) && !csp) {
     if (sourceLines.length && notIsfs(uri) && (fileName.includes(path.sep) || fileName.includes(" "))) {
@@ -116,6 +118,7 @@ export function generateFileContent(
       return {
         content: sourceLines,
         enc: false,
+        eol,
       };
     } else {
       sourceLines.shift();
@@ -137,12 +140,14 @@ export function generateFileContent(
       return {
         content: [`ROUTINE ${routineName} ${routineType}`, ...sourceLines],
         enc: false,
+        eol,
       };
     }
   }
   return {
     content: base64EncodeContent(Buffer.from(sourceContent)),
     enc: true,
+    eol,
   };
 }