solution to cli issue - TypeError: Cannot read properties of undefined (reading 'fsPath') #895 (#924)

* solution to cli issue TypeError: Cannot read properties of undefined (reading 'fsPath') #895

* readDevContainerConfigFile - implemented logic like in other commands - used the fn

* Update lockfile.ts

* changes as suggested in review comments

Author: gauravsaini04

src/spec-node/featuresCLI/resolveDependencies.ts

@@ -1,16 +1,23 @@
 import * as path from 'path';
-import * as jsonc from 'jsonc-parser';
 import { Argv } from 'yargs';
 import { LogLevel, mapLogLevel } from '../../spec-utils/log';
 import { getPackageConfig } from '../../spec-utils/product';
 import { createLog } from '../devContainers';
 import { UnpackArgv } from '../devContainersSpecCLI';
-import { isLocalFile, readLocalFile } from '../../spec-utils/pfs';
-import { DevContainerConfig, DevContainerFeature } from '../../spec-configuration/configuration';
+import { isLocalFile } from '../../spec-utils/pfs';
+import { DevContainerFeature } from '../../spec-configuration/configuration';
 import { buildDependencyGraph, computeDependsOnInstallationOrder, generateMermaidDiagram } from '../../spec-configuration/containerFeaturesOrder';
 import { OCISourceInformation, processFeatureIdentifier, userFeaturesToArray } from '../../spec-configuration/containerFeaturesConfiguration';
 import { readLockfile } from '../../spec-configuration/lockfile';
 import { runAsyncHandler } from '../utils';
+import { loadNativeModule } from '../../spec-common/commonUtils';
+import { getCLIHost } from '../../spec-common/cliHost';
+import { ContainerError } from '../../spec-common/errors';
+import { uriToFsPath } from '../../spec-configuration/configurationCommonUtils';
+import { workspaceFromPath } from '../../spec-utils/workspaces';
+import { readDevContainerConfigFile } from '../configContainer';
+import { URI } from 'vscode-uri';
+
 
 interface JsonOutput {
 	installOrder?: {
@@ -61,28 +68,28 @@ async function featuresResolveDependencies({
 		configPath = path.join(workspaceFolder, '.devcontainer', 'devcontainer.json');
 	}
 
-	// Load dev container config
-	const buffer = await readLocalFile(configPath);
-	if (!buffer) {
-		output.write(`Could not load devcontainer.json file from path ${configPath}`, LogLevel.Error);
-		process.exit(1);
-	}
+	const params = {
+		output,
+		env: process.env,
+	};
 
-	//  Parse dev container config
-	const config: DevContainerConfig = jsonc.parse(buffer.toString());
-	if (!config || !config.features) {
-		output.write(`No Features object in configuration '${configPath}'`, LogLevel.Error);
-		process.exit(1);
+	const cwd = workspaceFolder || process.cwd();
+	const cliHost = await getCLIHost(cwd, loadNativeModule, true);
+	const workspace = workspaceFromPath(cliHost.path, workspaceFolder);
+	const configFile: URI = URI.file(path.resolve(process.cwd(), configPath));
+	const configs = await readDevContainerConfigFile(cliHost, workspace, configFile, false, output, undefined, undefined);	
+
+	if (configFile && !configs) {
+		throw new ContainerError({ description: `Dev container config (${uriToFsPath(configFile, cliHost.platform)}) not found.` });
 	}
+	const configWithRaw = configs!.config;
+	const { config } = configWithRaw;
+
 	const userFeaturesConfig = userFeaturesToArray(config);
 	if (!userFeaturesConfig) {
 		output.write(`Could not parse features object in configuration '${configPath}'`, LogLevel.Error);
 		process.exit(1);
 	}
-	const params = {
-		output,
-		env: process.env,
-	};
 
 	const { lockfile } = await readLockfile(config);
 	const processFeature = async (_userFeature: DevContainerFeature) => {