fix: respect publishConfig.registry when specified

PR-URL: #35
Credit: @nlf
Close: #35
Reviewed-by: @darcyclarke

index.js

@@ -29,6 +29,7 @@ function regFetch (uri, /* istanbul ignore next */ opts_ = {}) {
   }
   const registry = opts.registry = (
     (opts.spec && pickRegistry(opts.spec, opts)) ||
+    (opts.publishConfig && opts.publishConfig.registry) ||
     opts.registry ||
     /* istanbul ignore next */
     'https://registry.npmjs.org/'
@@ -155,6 +156,10 @@ function pickRegistry (spec, opts = {}) {
     registry = opts[opts.scope.replace(/^@?/, '@') + ':registry']
   }
 
+  if (!registry && opts.publishConfig) {
+    registry = opts.publishConfig.registry
+  }
+
   if (!registry) {
     registry = opts.registry || 'https://registry.npmjs.org/'
   }

test/index.js

@@ -422,6 +422,18 @@ test('pickRegistry() utility', t => {
     'https://my.scoped.registry/here/',
     'scope @ is option@l'
   )
+  t.equal(
+    pick('foo@1.2.3', {
+      registry: 'https://my.registry/here/',
+      scope: '@otherscope',
+      '@myscope:registry': 'https://my.scoped.registry/here/',
+      publishConfig: {
+        registry: 'https://my.package.registry'
+      }
+    }),
+    'https://my.package.registry',
+    'respects publishConfig setting'
+  )
   t.done()
 })
 
@@ -461,6 +473,34 @@ test('pickRegistry through opts.spec', t => {
   ))
 })
 
+test('pickRegistry through publishConfig', t => {
+  tnock(t, OPTS.registry)
+    .get('/pkg')
+    .reply(200, { source: OPTS.registry })
+  const publishRegistry = 'https://my.publish.registry'
+  tnock(t, publishRegistry)
+    .get('/pkg')
+    .reply(200, { source: publishRegistry })
+
+  return fetch.json('/pkg', {
+    ...OPTS,
+    publishConfig: {}
+  }).then(json => t.equal(
+    json.source,
+    OPTS.registry,
+    'request made to default registry when publishConfig specifies no registry'
+  )).then(() => fetch.json('/pkg', {
+    ...OPTS,
+    publishConfig: {
+      registry: publishRegistry
+    }
+  }).then(json => t.equal(
+    json.source,
+    publishRegistry,
+    'request made to publishConfig.registry when one is specified'
+  )))
+})
+
 test('log warning header info', t => {
   tnock(t, OPTS.registry)
     .get('/hello')