allow to override cpu and os on reify

workspaces/arborist/lib/arborist/reify.js

@@ -628,7 +628,7 @@ module.exports = cls => class Reifier extends cls {
     process.emit('time', timer)
     this.addTracker('reify', node.name, node.location)
 
-    const { npmVersion, nodeVersion } = this.options
+    const { npmVersion, nodeVersion, cpu, os } = this.options
     const p = Promise.resolve().then(async () => {
       // when we reify an optional node, check the engine and platform
       // first. be sure to ignore the --force and --engine-strict flags,
@@ -638,7 +638,7 @@ module.exports = cls => class Reifier extends cls {
       // eslint-disable-next-line promise/always-return
       if (node.optional) {
         checkEngine(node.package, npmVersion, nodeVersion, false)
-        checkPlatform(node.package, false)
+        checkPlatform(node.package, false, { cpu, os })
       }
       await this[_checkBins](node)
       await this[_extractOrLink](node)

workspaces/arborist/tap-snapshots/test/arborist/reify.js.test.cjs

@@ -3161,6 +3161,44 @@ ArboristNode {
 }
 `
 
+exports[`test/arborist/reify.js TAP fail to install optional deps with matched os and mismatched cpu with os and cpu options > expect resolving Promise 1`] = `
+ArboristNode {
+  "edgesOut": Map {
+    "platform-specifying-test-package" => EdgeOut {
+      "name": "platform-specifying-test-package",
+      "spec": "1.0.0",
+      "to": null,
+      "type": "optional",
+    },
+  },
+  "isProjectRoot": true,
+  "location": "",
+  "name": "tap-testdir-reify-fail-to-install-optional-deps-with-matched-os-and-mismatched-cpu-with-os-and-cpu-options",
+  "packageName": "platform-test",
+  "path": "{CWD}/test/arborist/tap-testdir-reify-fail-to-install-optional-deps-with-matched-os-and-mismatched-cpu-with-os-and-cpu-options",
+  "version": "1.0.0",
+}
+`
+
+exports[`test/arborist/reify.js TAP fail to install optional deps with mismatched os and matched cpu with os and cpu options > expect resolving Promise 1`] = `
+ArboristNode {
+  "edgesOut": Map {
+    "platform-specifying-test-package" => EdgeOut {
+      "name": "platform-specifying-test-package",
+      "spec": "1.0.0",
+      "to": null,
+      "type": "optional",
+    },
+  },
+  "isProjectRoot": true,
+  "location": "",
+  "name": "tap-testdir-reify-fail-to-install-optional-deps-with-mismatched-os-and-matched-cpu-with-os-and-cpu-options",
+  "packageName": "platform-test",
+  "path": "{CWD}/test/arborist/tap-testdir-reify-fail-to-install-optional-deps-with-mismatched-os-and-matched-cpu-with-os-and-cpu-options",
+  "version": "1.0.0",
+}
+`
+
 exports[`test/arborist/reify.js TAP failing script means install failure, unless ignoreScripts prod-dep-allinstall-fail --ignore-scripts > expect resolving Promise 1`] = `
 ArboristNode {
   "children": Map {
@@ -32993,6 +33031,43 @@ exports[`test/arborist/reify.js TAP store files with a custom indenting > must m
 
 `
 
+exports[`test/arborist/reify.js TAP success to install optional deps with matched platform specifications with os and cpu options > expect resolving Promise 1`] = `
+ArboristNode {
+  "children": Map {
+    "platform-specifying-test-package" => ArboristNode {
+      "edgesIn": Set {
+        EdgeIn {
+          "from": "",
+          "name": "platform-specifying-test-package",
+          "spec": "1.0.0",
+          "type": "optional",
+        },
+      },
+      "location": "node_modules/platform-specifying-test-package",
+      "name": "platform-specifying-test-package",
+      "optional": true,
+      "path": "{CWD}/test/arborist/tap-testdir-reify-success-to-install-optional-deps-with-matched-platform-specifications-with-os-and-cpu-options/node_modules/platform-specifying-test-package",
+      "resolved": "https://registry.npmjs.org/platform-specifying-test-package/-/platform-specifying-test-package-1.0.0.tgz",
+      "version": "1.0.0",
+    },
+  },
+  "edgesOut": Map {
+    "platform-specifying-test-package" => EdgeOut {
+      "name": "platform-specifying-test-package",
+      "spec": "1.0.0",
+      "to": "node_modules/platform-specifying-test-package",
+      "type": "optional",
+    },
+  },
+  "isProjectRoot": true,
+  "location": "",
+  "name": "tap-testdir-reify-success-to-install-optional-deps-with-matched-platform-specifications-with-os-and-cpu-options",
+  "packageName": "platform-test",
+  "path": "{CWD}/test/arborist/tap-testdir-reify-success-to-install-optional-deps-with-matched-platform-specifications-with-os-and-cpu-options",
+  "version": "1.0.0",
+}
+`
+
 exports[`test/arborist/reify.js TAP tarball deps with transitive tarball deps > expect resolving Promise 1`] = `
 ArboristNode {
   "children": Map {

workspaces/arborist/test/arborist/reify.js

@@ -465,6 +465,18 @@ t.test('still do not install optional deps with mismatched platform specificatio
 t.test('fail to install deps with mismatched platform specifications', t =>
   t.rejects(printReified(fixture(t, 'platform-specification')), { code: 'EBADPLATFORM' }))
 
+t.test('success to install optional deps with matched platform specifications with os and cpu options', t =>
+  t.resolveMatchSnapshot(printReified(
+    fixture(t, 'optional-platform-specification'), { os: 'not-your-os', cpu: 'not-your-cpu' })))
+
+t.test('fail to install optional deps with matched os and mismatched cpu with os and cpu options', t =>
+  t.resolveMatchSnapshot(printReified(
+    fixture(t, 'optional-platform-specification'), { os: 'not-your-os', cpu: 'another-cpu' })))
+
+t.test('fail to install optional deps with mismatched os and matched cpu with os and cpu options', t =>
+  t.resolveMatchSnapshot(printReified(
+    fixture(t, 'optional-platform-specification'), { os: 'another-os', cpu: 'not-your-cpu' })))
+
 t.test('dry run, do not get anything wet', async t => {
   const cases = [
     'shrinkwrapped-dep-with-lock-empty',

workspaces/arborist/test/fixtures/registry-mocks/content/platform-specifying-test-package.json

@@ -21,6 +21,9 @@
       "os": [
         "not-your-os"
       ],
+      "cpu": [
+        "not-your-cpu"
+      ],
       "_id": "[email protected]",
       "_nodeVersion": "12.18.4",
       "_npmVersion": "6.14.6",

workspaces/arborist/test/fixtures/registry-mocks/content/platform-specifying-test-package.min.json

@@ -15,6 +15,9 @@
       },
       "os": [
         "not-your-os"
+      ],
+      "cpu": [
+        "not-your-cpu"
       ]
     }
   },