fix: EEXIST after first 'npx projen'

Unlink the `projen` symlink after requiring `.projenrc.js`.

Fixes projen#20

src/cli.ts

@@ -6,14 +6,6 @@ import * as yargs from 'yargs';
 const projenfile = path.resolve(PROJEN_RC);
 const projen = path.dirname(require.resolve('../package.json'));
 
-// now in order to run, projen needs to be able to "require('projen')". this will
-// work if we already installed our modules, but will fail miserably when we
-// bootstrap a checked out (or empty) repo.
-const symlink = path.join('node_modules', 'projen');
-if (!fs.existsSync(symlink)) {
-  fs.mkdirpSync('node_modules');
-  fs.symlinkSync(projen, symlink);
-}
 
 const args = yargs
   .commandDir('cmds')
@@ -29,7 +21,24 @@ if (args._.length === 0) {
     process.exit(1);
   }
 
-  // eslint-disable-next-line @typescript-eslint/no-require-imports
-  require(projenfile);
+  // now in order to run, projen needs to be able to "require('projen')". this will
+  // work if we already installed our modules, but will fail miserably when we
+  // bootstrap a checked out (or empty) repo.
+  let unlink;
+  const symlink = path.join('node_modules', 'projen');
+  if (!fs.existsSync(symlink)) {
+    fs.mkdirpSync('node_modules');
+    fs.symlinkSync(projen, symlink);
+    unlink = symlink;
+  }
+
+  try {
+    // eslint-disable-next-line @typescript-eslint/no-require-imports
+    require(projenfile);
+  } finally {
+    if (unlink) {
+      fs.unlinkSync(symlink);
+    }
+  }
 }
 

src/cmds/new.ts

@@ -84,7 +84,10 @@ class Command implements yargs.CommandModule {
   }
 
   public async handler(args: any) {
-    console.log({args});
+    console.log(`Invalid project type ${args.projectType}. Supported types:`);
+    for (const pjid of inventory.discover().map(x => x.pjid)) {
+      console.log(`  ${pjid}`);
+    }
   }
 }