Fix cmake.compileFile truncating long compile commands (#4783)

* Initial plan

* Fix cmake.compileFile truncating long commands at ~1024 characters (#4470)

Co-authored-by: Omotola <[email protected]>

* Address code review: add defensive fallback for empty/undefined arguments

Co-authored-by: Omotola <[email protected]>

---------

Co-authored-by: copilot-swe-agent[bot] <[email protected]>
Co-authored-by: Omotola <[email protected]>
Co-authored-by: Omotola <[email protected]>

Author: Copilot

CHANGELOG.md

@@ -27,6 +27,7 @@ Improvements:
 - Honor `debugger.workingDirectory` from the CMake File API when debugging a target, so that the `DEBUGGER_WORKING_DIRECTORY` target property is used as the debugger working directory. [#4595](https://github.com/microsoft/vscode-cmake-tools/issues/4595)
 
 Bug Fixes:
+- Fix `cmake.compileFile` command truncating long compile commands at ~1024 characters on macOS. The command is now sent to the terminal in chunks to avoid VS Code terminal buffer limitations. [#4470](https://github.com/microsoft/vscode-cmake-tools/issues/4470)
 - Fix configure/build sometimes using stale preset values when unsaved changes to included preset files are auto-saved before configure. The extension now explicitly refreshes presets from disk after saving, instead of relying solely on the asynchronous file watcher. [#4502](https://github.com/microsoft/vscode-cmake-tools/issues/4502)
 - Reduce overly verbose logging when CMake configure or build fails. The Output panel no longer floods with duplicated output, and the channel is only revealed on error rather than unconditionally. [#4749](https://github.com/microsoft/vscode-cmake-tools/issues/4749)
 - Fix Test Results panel not hyperlinking file paths for GoogleTest failures. The default `cmake.ctest.failurePatterns` now includes a pattern matching GoogleTest's `file:line: Failure` output format. [#4589](https://github.com/microsoft/vscode-cmake-tools/issues/4589)

src/drivers/cmakeDriver.ts

@@ -8,6 +8,7 @@ import * as lodash from "lodash";
 
 import { CMakeExecutable } from '@cmt/cmakeExecutable';
 import * as codepages from '@cmt/codePageTable';
+import * as shlex from '@cmt/shlex';
 import { ConfigureCancelInformation, ConfigureTrigger, DiagnosticsConfiguration } from "@cmt/cmakeProject";
 import { CompileCommand } from '@cmt/compilationDatabase';
 import { ConfigurationReader, checkBuildOverridesPresent, checkConfigureOverridesPresent, checkTestOverridesPresent, checkPackageOverridesPresent, defaultNumJobs } from '@cmt/config';
@@ -575,7 +576,21 @@ export abstract class CMakeDriver implements vscode.Disposable {
             existing = term;
         }
         existing.show();
-        existing.sendText(cmd.command + '\r\n');
+        // Send the command and arguments individually to avoid terminal buffer truncation
+        // issues with long command lines (see https://github.com/microsoft/vscode/issues/233420).
+        // The arguments array is always populated by CompilationDatabase, either from the
+        // compile_commands.json or by parsing the command string.
+        const args = cmd.arguments;
+        if (args && args.length > 0) {
+            existing.sendText(shlex.quote(args[0]), false);
+            for (let i = 1; i < args.length; i++) {
+                existing.sendText(` ${shlex.quote(args[i])}`, false);
+            }
+            existing.sendText('', true); // Send newline to execute the command
+        } else {
+            // Fallback to original behavior if arguments not available
+            existing.sendText(cmd.command + '\r\n');
+        }
         return existing;
     }