feat(cli): use local version when available

Fixes #75

bin/clark

@@ -1,5 +1,47 @@
 #!/usr/bin/env node
+
 'use strict';
 
-// eslint-disable-next-line import/no-unassigned-import
-require('../lib/cli');
+const fs = require('fs');
+const path = require('path');
+
+const findRoot = require('find-root');
+
+const {makeDebug} = require('../lib/lib/debug');
+
+const debug = makeDebug(__filename);
+
+try {
+  debug('looking for locally installed clark');
+  const root = findRoot(process.cwd(), dir => {
+    const clarkPath = path.resolve(dir, 'node_modules', '.bin', 'clark');
+    // eslint-disable-next-line no-sync
+    return fs.existsSync(clarkPath);
+  });
+
+  debug('found locally installed clark');
+  // This isn't perfect; it could break for certain layouts of node_modules, but
+  // I'm not sure those layouts can happen in a way that would also allow clark
+  // to work in a project.
+  const localPath = path.resolve(
+    root,
+    'node_modules',
+    '@ianwremmel',
+    'clark',
+    'lib',
+    'cli',
+  );
+  debug(`loading clark at ${localPath}`);
+  require(localPath);
+  debug('loaded locally installed clark');
+} catch (err) {
+  if (err.message === 'package.json not found in path') {
+    debug('did not find locally installed clark');
+    debug('falling back to global clark');
+    // eslint-disable-next-line import/no-unassigned-import
+    require('../lib/cli');
+    debug('loaded globally installed clark');
+  } else {
+    throw err;
+  }
+}

src/cli.ts

@@ -1,5 +1,9 @@
+import {readFileSync} from 'fs';
+import {sync as pkgUp} from 'pkg-up';
 import y, {Argv} from 'yargs';
 
+const pkg = JSON.parse(readFileSync(pkgUp(__dirname), 'utf-8'));
+
 // so, yargs's d.ts is...weird. This is an unfortunate set of castings to
 // convince typescript that all is well.
 const yargs = (y as any) as Argv;
@@ -19,4 +23,5 @@ yargs
   .help()
   .recommendCommands()
   .strict()
+  .version(pkg.version)
   .parse();