fix: workspace can use only latest ci version of root

lib/config.js

@@ -216,9 +216,13 @@ const getFullConfig = async ({
   }
 
   if (pkgConfig.ciVersions) {
-    const versions = pkgConfig.ciVersions
-    const defaultVersions = defaultConfig.ciVersions
-    const parsed = parseCIVersions(versions === 'latest' ? defaultVersions.slice(-1) : versions)
+    let versions = pkgConfig.ciVersions
+    if (versions === 'latest') {
+      const defaultVersions = [rootPkgConfig, defaultConfig].find(c => Array.isArray(c.ciVersions))
+      versions = defaultVersions.ciVersions.slice(-1)
+    }
+
+    const parsed = parseCIVersions(versions)
     derived.ciVersions = parsed.targets
     derived.engines = pkgConfig.engines || parsed.engines
   }

test/apply/engines.js

@@ -33,3 +33,37 @@ t.test('latest ci versions', async (t) => {
   const pkg = await s.readJson('package.json')
   t.equal(pkg.engines.node, '>=18.0.0')
 })
+
+t.test('latest ci versions in workspace', async (t) => {
+  const s = await setup(t, {
+    package: {
+      templateOSS: {
+        content: 'content',
+        ciVersions: ['12.x', '14.x', '16.x'],
+      },
+    },
+    workspaces: {
+      a: {
+        templateOSS: {
+          ciVersions: 'latest',
+        },
+      },
+    },
+    testdir: {
+      content: {
+        'source.json': '{ "node": {{{ json engines }}} }',
+        'index.js': `module.exports={
+          rootRepo:{add:{'target.json':'source.json'}},
+          workspaceRepo:{add:{'target-{{ pkgNameFs }}.json':'source.json'}}
+        }`,
+      },
+    },
+  })
+  await s.apply()
+
+  const root = await s.readJson('target.json')
+  const workspace = await s.readJson('target-a.json')
+
+  t.equal(root.node, '^12.0.0 || ^14.0.0 || >=16.0.0')
+  t.equal(workspace.node, '>=16.0.0')
+})