fix: Handle whitespace in homedir paths (#98)

Fixes istanbuljs/nyc#784

lib/mungers/cmd.js

@@ -43,7 +43,7 @@ function mungeCmd(workingDir, options) {
 
     let npmPath = whichOrUndefined('npm') || 'npm'
     npmPath = path.dirname(npmPath) + '\\node_modules\\npm\\bin\\npm-cli.js'
-    replace = m[1] + workingDir + '/node.cmd' +
+    replace = m[1] + '"' + workingDir + '/node.cmd"' +
       ' "' + npmPath + '"' +
       m[3] + m[4]
     options.args[cmdi + 1] = command.replace(npmre, replace)

test/shim-root-space.js

@@ -0,0 +1,23 @@
+const IS_WINDOWS = require('is-windows')();
+const tap = require('tap');
+const path = require('path');
+const fs = require('fs');
+
+tap.test('spaces in shim-root/homedir path on windows do not break wrapped npm calls', { skip: !IS_WINDOWS }, function(t) {
+  // create temp folder with spaces in path
+  process.env.SPAWN_WRAP_SHIM_ROOT = path.join(__dirname, 'fixtures', 'space path');
+
+  // wrap with custom root path
+  const sw = require('..');
+  const unwrap = sw([]);
+
+  // run a child process with an npm command
+  const cp = require('child_process');
+  const child = cp.exec('npm --version');
+  child.on('exit', function(code) {
+    t.equal(code, 0);
+    unwrap();
+    fs.rmdirSync(process.env.SPAWN_WRAP_SHIM_ROOT);
+    t.end();
+  });
+});