How to create AnalysisContextCollection without having to pass paths? (using MemoryResourceProvider maybe)

[Abenezer Belay]

This was my attempt to create an in-memory-based AnalysisContext. But it doesn't work. In addition, I am using class I shouldn't be using according to the doc, like ContextLocator and ContextBuilder.

```

import 'package:analyzer/dart/analysis/analysis_context.dart';

import 'package:analyzer/dart/analysis/analysis_context_collection.dart';

import 'package:analyzer/dart/analysis/context_builder.dart';

import 'package:analyzer/dart/analysis/context_locator.dart';

import 'package:analyzer/dart/analysis/context_root.dart';

import 'package:analyzer/dart/analysis/results.dart';

import 'package:analyzer/dart/analysis/session.dart';

import 'package:analyzer/error/error.dart';

import 'package:analyzer/file_system/file_system.dart';

import 'package:analyzer/file_system/memory_file_system.dart';

import 'package:analyzer/src/dart/analysis/context_builder.dart';

Future<void> main() async {

final myCode = '''

void main() {

print('Hello, world!')

}

''';

final resourceProvider = MemoryResourceProvider();

final codeFile = resourceProvider.newFile('/my.dart', myCode);

print("path: " + codeFile.path);

final contextLocator = ContextLocator(resourceProvider: resourceProvider);

final contextRoot =

contextLocator.locateRoots(includedPaths: [codeFile.path]).first;

final contextBuilder = ContextBuilder(resourceProvider: resourceProvider);

final analysisContext =

contextBuilder.createContext(contextRoot: contextRoot);

final session = analysisContext.currentSession;

var issueCount = 0;

final errorsResult = await session.getErrors(codeFile.path);

if (errorsResult is ErrorsResult) {

for (final error in errorsResult.errors) {

if (error.errorCode.type != ErrorType.TODO) {

print(' \u001b[1m${error.source.shortName}\u001b[0m ${error.message}');

issueCount++;

}

}

}

}

```

Is there any way to analyze code strings without creating a temporary file?

[Brian Wilkerson]

Is there any way to analyze code strings without creating a temporary file?

There are a couple of utility methods in https://github.com/dart-lang/sdk/blob/main/pkg/analyzer/lib/dart/analysis/utilities.dart. I don't know whether they meet your needs.

If you're going to be analyzing more than one file, though, it's more efficient to create analysis contexts in which to do the analysis. The document https://github.com/dart-lang/sdk/blob/main/pkg/analyzer/doc/tutorial/analysis.md explains how to create an `AnalysisContextCollection` to do that (which you can use with a `MemoryResourceProvider`).

Let me know if you have other questions.

If it's easier, you can also reach us on the analyzer-hackers channel on Discord: https://discord.com/channels/608014603317936148/1171510601655275612.

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[Abenezer Belay]

Hi @brianwilkerson, 

That was exactly what I wanted. ParseString worked perfectly. Thank you!