fix(docs): create tags route if only tags exists (#5606)

Author: lex111

packages/docusaurus-plugin-content-docs/src/__tests__/__snapshots__/index.test.ts.snap

@@ -1019,8 +1019,6 @@ Object {
   },
   \\"sidebar\\": \\"community\\"
 }",
-  "tags-list-1-0-0-prop-483.json": "[]",
-  "tags-list-current-prop-15a.json": "[]",
   "version-1-0-0-metadata-prop-608.json": "{
   \\"pluginId\\": \\"community\\",
   \\"version\\": \\"1.0.0\\",
@@ -1102,22 +1100,6 @@ Object {
 
 exports[`versioned website (community) content: route config 1`] = `
 Array [
-  Object {
-    "component": "@theme/DocTagsListPage",
-    "exact": true,
-    "modules": Object {
-      "tags": "~docs/tags-list-current-prop-15a.json",
-    },
-    "path": "/community/next/tags",
-  },
-  Object {
-    "component": "@theme/DocTagsListPage",
-    "exact": true,
-    "modules": Object {
-      "tags": "~docs/tags-list-1-0-0-prop-483.json",
-    },
-    "path": "/community/tags",
-  },
   Object {
     "component": "@theme/DocPage",
     "exact": false,
@@ -1654,8 +1636,6 @@ Object {
   ],
   \\"allTagsPath\\": \\"/docs/next/tags\\"
 }",
-  "tags-list-1-0-0-prop-483.json": "[]",
-  "tags-list-1-0-1-prop-c39.json": "[]",
   "tags-list-current-prop-15a.json": "[
   {
     \\"name\\": \\"barTag 1\\",
@@ -1673,7 +1653,6 @@ Object {
     \\"count\\": 1
   }
 ]",
-  "tags-list-with-slugs-prop-1ca.json": "[]",
   "version-1-0-0-metadata-prop-608.json": "{
   \\"pluginId\\": \\"default\\",
   \\"version\\": \\"1.0.0\\",
@@ -1970,14 +1949,6 @@ Object {
 
 exports[`versioned website content: route config 1`] = `
 Array [
-  Object {
-    "component": "@theme/DocTagsListPage",
-    "exact": true,
-    "modules": Object {
-      "tags": "~docs/tags-list-1-0-0-prop-483.json",
-    },
-    "path": "/docs/1.0.0/tags",
-  },
   Object {
     "component": "@theme/DocTagsListPage",
     "exact": true,
@@ -2010,22 +1981,6 @@ Array [
     },
     "path": "/docs/next/tags/barTag-3-permalink",
   },
-  Object {
-    "component": "@theme/DocTagsListPage",
-    "exact": true,
-    "modules": Object {
-      "tags": "~docs/tags-list-1-0-1-prop-c39.json",
-    },
-    "path": "/docs/tags",
-  },
-  Object {
-    "component": "@theme/DocTagsListPage",
-    "exact": true,
-    "modules": Object {
-      "tags": "~docs/tags-list-with-slugs-prop-1ca.json",
-    },
-    "path": "/docs/withSlugs/tags",
-  },
   Object {
     "component": "@theme/DocPage",
     "exact": false,

packages/docusaurus-plugin-content-docs/src/index.ts

@@ -328,18 +328,22 @@ export default function pluginContentDocs(
             permalink: tagValue.permalink,
             count: tagValue.docIds.length,
           }));
-          const tagsPropPath = await createData(
-            `${docuHash(`tags-list-${loadedVersion.versionName}-prop`)}.json`,
-            JSON.stringify(tagsProp, null, 2),
-          );
-          addRoute({
-            path: loadedVersion.tagsPath,
-            exact: true,
-            component: options.docTagsListComponent,
-            modules: {
-              tags: aliasedSource(tagsPropPath),
-            },
-          });
+
+          // Only create /tags page if there are tags.
+          if (Object.keys(tagsProp).length > 0) {
+            const tagsPropPath = await createData(
+              `${docuHash(`tags-list-${loadedVersion.versionName}-prop`)}.json`,
+              JSON.stringify(tagsProp, null, 2),
+            );
+            addRoute({
+              path: loadedVersion.tagsPath,
+              exact: true,
+              component: options.docTagsListComponent,
+              modules: {
+                tags: aliasedSource(tagsPropPath),
+              },
+            });
+          }
         }
 
         async function createTagDocListPage(tag: VersionTag) {