fix: skip non-semver nvmrc

lib/manager/nvm/extract.js

+const semver = require('../../versioning/semver');
+
 module.exports = {
   extractDependencies,
 };
 
 function extractDependencies(content) {
-  const deps = [
-    {
-      depName: 'node',
-      currentVersion: content.trim(),
-      purl: 'pkg:github/nodejs/node?clean=true',
-      versionScheme: 'semver',
-    },
-  ];
-  return { deps };
+  const dep = {
+    depName: 'node',
+    currentVersion: content.trim(),
+    purl: 'pkg:github/nodejs/node?clean=true',
+    versionScheme: 'semver',
+  };
+  if (!semver.isPinnedVersion(dep.currentVersion)) {
+    dep.skipReason = 'unsupported-version';
+  }
+  return { deps: [dep] };
 }

test/manager/nvm/__snapshots__/extract.spec.js.snap

@@ -10,3 +10,15 @@ Array [
   },
 ]
 `;
+
+exports[`lib/manager/nvm/extract extractDependencies() skips non-pinned 1`] = `
+Array [
+  Object {
+    "currentVersion": "8.4",
+    "depName": "node",
+    "purl": "pkg:github/nodejs/node?clean=true",
+    "skipReason": "unsupported-version",
+    "versionScheme": "semver",
+  },
+]
+`;

test/manager/nvm/extract.spec.js

@@ -6,5 +6,9 @@ describe('lib/manager/nvm/extract', () => {
       const res = extractDependencies('8.4.0\n');
       expect(res.deps).toMatchSnapshot();
     });
+    it('skips non-pinned', () => {
+      const res = extractDependencies('8.4\n');
+      expect(res.deps).toMatchSnapshot();
+    });
   });
 });