fix(shrinkwrap): save non-default registries in resolution field

src/link/updateShrinkwrap.ts

@@ -179,16 +179,19 @@ function toShrResolution (
   if (dp.isAbsolute(relDepPath) || resolution.type !== undefined || !resolution['integrity']) {
     return resolution as ShrinkwrapResolution
   }
+  const base = registry !== resolution['registry'] ? {registry: resolution['registry']} : {}
   // Sometimes packages are hosted under non-standard tarball URLs.
   // For instance, when they are hosted on npm Enterprise. See https://github.com/pnpm/pnpm/issues/867
   // Or in othere weird cases, like https://github.com/pnpm/pnpm/issues/1072
   if (getNpmTarballUrl(pkg.name, pkg.version, {registry}) !== resolution['tarball']) {
     return {
+      ...base,
       integrity: resolution['integrity'],
       tarball: relativeTarball(resolution['tarball'], registry),
     }
   }
   return {
+    ...base,
     integrity: resolution['integrity'],
   }
   // tslint:enable:no-string-literal

test/shrinkwrap.ts

@@ -844,3 +844,19 @@ test('save tarball URL when it is non-standard', async (t: tape.Test) => {
 
   t.equal(shr.packages['/esprima-fb/3001.1.0-dev-harmony-fb'].resolution.tarball, '/esprima-fb/-/esprima-fb-3001.0001.0000-dev-harmony-fb.tgz')
 })
+
+test('when package registry differs from default one, save it to resolution field', async (t: tape.Test) => {
+  const project = prepare(t)
+
+  await installPkgs(['@zkochan/git-config', 'is-positive'], await testDefaults({
+    rawNpmConfig: {
+      '@zkochan:registry': 'https://registry.node-modules.io/',
+      'registry': 'https://registry.npmjs.org/',
+    },
+    registry: 'https://registry.npmjs.org/',
+  }))
+
+  const shr = await project.loadShrinkwrap()
+
+  t.equal(shr.packages['/@zkochan/git-config/0.1.0'].resolution.registry, 'https://registry.node-modules.io/')
+})