Update ghcup to 0.1.8 and add ghc-8.8.4 support

Need to make the apt install function not error whenever it returns a
non-zero exit code, because ghc-8.8.4 isn't available via apt just yet

dist/index.js

@@ -4334,7 +4334,7 @@ function escapeProperty(s) {
 /***/ 447:
 /***/ (function(module) {
 
-module.exports = {"ghc":["8.10.1","8.8.3","8.8.2","8.8.1","8.6.5","8.6.4","8.6.3","8.6.2","8.6.1","8.4.4","8.4.3","8.4.2","8.4.1","8.2.2","8.0.2","7.10.3"],"cabal":["3.2.0.0","3.0.0.0","2.4.1.0","2.4.0.0","2.2.0.0"],"stack":["2.3.1","2.1.3","2.1.1","1.9.3","1.9.1","1.7.1","1.6.5","1.6.3","1.6.1","1.5.1","1.5.0","1.4.0","1.3.2","1.3.0","1.2.0"]};
+module.exports = {"ghc":["8.10.1","8.8.4","8.8.3","8.8.2","8.8.1","8.6.5","8.6.4","8.6.3","8.6.2","8.6.1","8.4.4","8.4.3","8.4.2","8.4.1","8.2.2","8.0.2","7.10.3"],"cabal":["3.2.0.0","3.0.0.0","2.4.1.0","2.4.0.0","2.2.0.0"],"stack":["2.3.1","2.1.3","2.1.1","1.9.3","1.9.1","1.7.1","1.6.5","1.6.3","1.6.1","1.5.1","1.5.0","1.4.0","1.3.2","1.3.0","1.2.0"]};
 
 /***/ }),
 
@@ -11095,7 +11095,10 @@ async function apt(tool, version) {
     const toolName = tool === 'ghc' ? 'ghc' : 'cabal-install';
     const v = tool === 'cabal' ? version.slice(0, 3) : version;
     core.info(`Attempting to install ${toolName} ${v} using apt-get`);
-    await exec_1.exec(`sudo -- sh -c "apt-get -y install ${toolName}-${v}"`);
+    // Ignore the return code so we can fall back to ghcup
+    await exec_1.exec(`sudo -- sh -c "apt-get -y install ${toolName}-${v}"`, undefined, {
+        ignoreReturnCode: true
+    });
 }
 async function choco(tool, version) {
     core.info(`Attempting to install ${tool} ${version} using chocolatey`);
@@ -11111,7 +11114,7 @@ async function choco(tool, version) {
     ]);
 }
 async function ghcupBin(os) {
-    const v = '0.1.5';
+    const v = '0.1.8';
     const cachedBin = tc.find('ghcup', v);
     if (cachedBin)
         return path_1.join(cachedBin, 'ghcup');

src/installer.ts

@@ -161,7 +161,10 @@ async function apt(tool: Tool, version: string): Promise<void> {
   const toolName = tool === 'ghc' ? 'ghc' : 'cabal-install';
   const v = tool === 'cabal' ? version.slice(0, 3) : version;
   core.info(`Attempting to install ${toolName} ${v} using apt-get`);
-  await exec(`sudo -- sh -c "apt-get -y install ${toolName}-${v}"`);
+  // Ignore the return code so we can fall back to ghcup
+  await exec(`sudo -- sh -c "apt-get -y install ${toolName}-${v}"`, undefined, {
+    ignoreReturnCode: true
+  });
 }
 
 async function choco(tool: Tool, version: string): Promise<void> {
@@ -180,7 +183,7 @@ async function choco(tool: Tool, version: string): Promise<void> {
 }
 
 async function ghcupBin(os: OS): Promise<string> {
-  const v = '0.1.5';
+  const v = '0.1.8';
   const cachedBin = tc.find('ghcup', v);
   if (cachedBin) return join(cachedBin, 'ghcup');
 

src/versions.json

@@ -1,6 +1,7 @@
 {
   "ghc": [
     "8.10.1",
+    "8.8.4",
     "8.8.3",
     "8.8.2",
     "8.8.1",