feat: Support custom file Path

package.json

@@ -90,6 +90,12 @@
                         "type": "string"
                     },
                     "type": "array"
+                },
+                "tach.configuration": {
+                    "default": "",
+                    "description": "Path to a `tach.toml` file to use for configuration. By default, the extension will mirror the behavior that the `tach` CLI would have.",
+                    "scope": "resource",
+                    "type": "string"
                 }
             }
         },

src/common/server.ts

@@ -14,9 +14,37 @@ import { traceError, traceInfo, traceVerbose } from './log/logging';
 import { getExtensionSettings, getGlobalSettings, getWorkspaceSettings, ISettings } from './settings';
 import { getLSClientTraceLevel, getProjectRoot } from './utilities';
 import { isVirtualWorkspace } from './vscodeapi';
+import { execFile } from 'child_process';
+import { supportsCustomConfig, VersionInfo } from './version';
 
 export type IInitOptions = { settings: ISettings[]; globalSettings: ISettings };
 
+
+/**
+ * Executes a command for the given executable and returns the stdout output.
+ */
+function executeTachBinary(file: string, args: string[] = []): Promise<string> {
+    return new Promise((resolve, reject) => {
+      execFile(file, args, (error, stdout, stderr) => {
+        if (error) {
+          reject(new Error(stderr || error.message));
+        } else {
+          resolve(stdout);
+        }
+      });
+    });
+}
+
+/**
+ * Gets the version information from the Tach executable.
+ */
+async function getTachVersion(pythonExecutable: string): Promise<VersionInfo> {
+    const stdout = await executeTachBinary(pythonExecutable, ["-m", "tach", "--version"]);
+    const version = stdout.trim().split(" ")[1];
+    const [major, minor, patch] = version.split(".").map((x) => parseInt(x, 10));
+    return new VersionInfo(major, minor, patch);
+  }
+
 async function createServer(
     settings: ISettings,
     serverId: string,
@@ -34,7 +62,19 @@ async function createServer(
         newEnv.PYTHONPATH = BUNDLED_PYTHON_LIBS_DIR;
     }
 
+
     const args = settings.interpreter.slice(1).concat(["-m", "tach", "server"]);
+
+    if (settings.configuration) {
+        const version = await getTachVersion(command);
+        if (!supportsCustomConfig(version)) {
+            traceError(`Server: Tach version ${version.toString()} does not support custom configuration files.`);
+        } else {
+            traceInfo(`Server: Using custom configuration file: ${settings.configuration}`);
+            args.push("-c", settings.configuration);
+        }
+    }
+
     traceInfo(`Server run command: ${[command, ...args].join(' ')}`);
 
     const serverOptions: ServerOptions = {

src/common/settings.ts

@@ -12,6 +12,7 @@ export interface ISettings {
     workspace: string;
     interpreter: string[];
     importStrategy: ImportStrategy;
+    configuration: string | null;
 }
 
 export function getExtensionSettings(namespace: string, includeInterpreter?: boolean): Promise<ISettings[]> {
@@ -65,6 +66,7 @@ export async function getWorkspaceSettings(
         workspace: workspace.uri.toString(),
         interpreter: resolveVariables(interpreter, workspace),
         importStrategy: config.get<ImportStrategy>(`importStrategy`) ?? 'useBundled',
+        configuration: config.get<string>(`configuration`) ?? null,
     };
     return workspaceSetting;
 }
@@ -90,6 +92,7 @@ export async function getGlobalSettings(namespace: string, includeInterpreter?:
         workspace: process.cwd(),
         interpreter: interpreter,
         importStrategy: getGlobalValue<ImportStrategy>(config, 'importStrategy', 'useBundled'),
+        configuration: getGlobalValue<string | null>(config, 'configuration', null),
     };
     return setting;
 }

src/common/utilities.ts

@@ -6,6 +6,7 @@ import * as path from 'path';
 import { LogLevel, Uri, WorkspaceFolder } from 'vscode';
 import { Trace } from 'vscode-jsonrpc/node';
 import { getWorkspaceFolders } from './vscodeapi';
+import { LanguageClient } from 'vscode-languageclient/node';
 
 function logLevelToTrace(logLevel: LogLevel): Trace {
     switch (logLevel) {

src/common/version.ts

@@ -0,0 +1,33 @@
+export class VersionInfo {
+    constructor(
+        public major: number,
+        public minor: number,
+        public patch: number
+    ) {}
+
+    toString(): string {
+        return `${this.major}.${this.minor}.${this.patch}`;
+    }
+}
+
+function versionGte(a: VersionInfo, b: VersionInfo): boolean {
+    if (a.major !== b.major) {
+        return a.major > b.major;
+    }
+    if (a.minor !== b.minor) {
+        return a.minor > b.minor;
+    }
+    return a.patch >= b.patch;
+}
+
+const MIN_VERSION_WITH_CONFIG = {
+    major: 0,
+    minor: 24,
+    patch: 0,
+};
+
+
+
+export function supportsCustomConfig(version: VersionInfo): boolean {
+    return versionGte(version, MIN_VERSION_WITH_CONFIG);
+}