fix(query): properly return :missing nodes (#7320)

Fixes #7316

Author: wraithgar

lib/commands/query.js

@@ -113,10 +113,12 @@ class Query extends BaseCommand {
   // builds a normalized inventory
   buildResponse (items) {
     for (const node of items) {
-      if (!this.#seen.has(node.target.location)) {
+      if (!node.target.location || !this.#seen.has(node.target.location)) {
         const item = new QuerySelectorItem(node)
         this.#response.push(item)
-        this.#seen.add(item.location)
+        if (node.target.location) {
+          this.#seen.add(item.location)
+        }
       }
     }
   }

tap-snapshots/test/lib/commands/query.js.test.cjs

@@ -99,6 +99,31 @@ exports[`test/lib/commands/query.js TAP linked node > should return linked node
 ]
 `
 
+exports[`test/lib/commands/query.js TAP missing > should return missing node 1`] = `
+[
+  {
+    "name": "b",
+    "version": "^1.0.0",
+    "_id": "b@^1.0.0",
+    "pkgid": "b@^1.0.0",
+    "path": null,
+    "realpath": null,
+    "resolved": null,
+    "from": [
+      ""
+    ],
+    "to": [],
+    "dev": true,
+    "inBundle": false,
+    "deduped": false,
+    "overridden": false,
+    "queryContext": {
+      "missing": true
+    }
+  }
+]
+`
+
 exports[`test/lib/commands/query.js TAP package-lock-only with package lock > should return valid response with only lock info 1`] = `
 [
   {

test/lib/commands/query.js

@@ -320,3 +320,25 @@ t.test('expect entries', t => {
   })
   t.end()
 })
+
+t.test('missing', async t => {
+  const { npm, joinedOutput } = await loadMockNpm(t, {
+    prefixDir: {
+      node_modules: {
+        a: {
+          name: 'a',
+          version: '1.0.0',
+        },
+      },
+      'package.json': JSON.stringify({
+        name: 'project',
+        dependencies: {
+          a: '^1.0.0',
+          b: '^1.0.0',
+        },
+      }),
+    },
+  })
+  await npm.exec('query', [':missing'])
+  t.matchSnapshot(joinedOutput(), 'should return missing node')
+})

workspaces/arborist/lib/query-selector-all.js

@@ -257,7 +257,12 @@ class Results {
       for (const edge of node.edgesOut.values()) {
         if (edge.missing) {
           const pkg = { name: edge.name, version: edge.spec }
-          res.push(new this.#targetNode.constructor({ pkg }))
+          const item = new this.#targetNode.constructor({ pkg })
+          item.queryContext = {
+            missing: true,
+          }
+          item.edgesIn = new Set([edge])
+          res.push(item)
         }
       }
       return res