Fix macos ghcup and cabal flags (#4)

* fix short-circuit logic for ghcup based installs of ghc

* fix unrecognized user-config option for cabal v2.0

* update dependencies

src/setup-haskell.ts

@@ -1,9 +1,20 @@
 import * as core from '@actions/core';
+import * as fs from 'fs';
 import {getOpts, getDefaults, Tool} from './opts';
 import {installTool} from './installer';
 import type {OS} from './opts';
 import {exec} from '@actions/exec';
 
+async function cabalConfig(): Promise<string> {
+  let out = Buffer.from('');
+  const append = (b: Buffer): Buffer => (out = Buffer.concat([out, b]));
+  await exec('cabal', ['--help'], {
+    silent: true,
+    listeners: {stdout: append, stderr: append}
+  });
+  return out.toString().trim().split('\n').slice(-1)[0].trim();
+}
+
 (async () => {
   try {
     core.info('Preparing to setup a Haskell environment');
@@ -21,16 +32,19 @@ import {exec} from '@actions/exec';
 
     if (opts.cabal.enable)
       await core.group('Setting up cabal', async () => {
-        await exec(
-          'cabal user-config update -a "http-transport: plain-http" -v3'
-        );
-        await exec('cabal', ['update']);
+        await exec('cabal', ['user-config', 'update'], {silent: true});
+        const configFile = await cabalConfig();
+        fs.appendFileSync(configFile, 'http-transport: plain-http\n');
+
         if (process.platform === 'win32') {
-          await exec('cabal user-config update -a "store-dir: C:\\sr" -v3');
+          fs.appendFileSync(configFile, 'store-dir: C:\\sr\n');
           core.setOutput('cabal-store', 'C:\\sr');
         } else {
           core.setOutput('cabal-store', `${process.env.HOME}/.cabal/store`);
         }
+
+        await exec('cabal user-config update');
+        if (!opts.stack.enable) await exec('cabal update');
       });
   } catch (error) {
     core.setFailed(error.message);