Change "docs/home" to "docs" (#1257)

* Move /doc/home to /doc

- Change sidebar.json to point Home to the new url and keep the same label.
- Change DocsPage model to generate home at new url.
- Swap /doc -> /doc/home redirect to the other way around.
- Change link component to allow empty strings that aren't undefined.

* Re-add 307 code to swapped redirect

* remove unnecessary falsy checks

* remove old comment

* Don't use '/' in doc home path creation

* Change up redirects so new docs home never has a trailing slash

* Remove old reversed redirect

* Change instance of /doc/home to /doc

* Fix slightly messed up redirects list

content/blog/2020-04-30-gsod-ideas-2020.md

@@ -121,10 +121,10 @@ few skills we look for in applicants.
    friendly wording as much as possible and pay close attention to consistency
    in our terminology. Our team will help with copy editing.
 
-1. **Command line experience.** [DVC](/doc/home) is a command line tool that
-   builds on top of [Git](https://git-scm.com/), so being able to play with it
-   and test the features will be very useful. Creating and managing files,
-   GNU/Linux commands, file and permission administration are desired skills.
+1. **Command line experience.** [DVC](/doc) is a command line tool that builds
+   on top of [Git](https://git-scm.com/), so being able to play with it and test
+   the features will be very useful. Creating and managing files, GNU/Linux
+   commands, file and permission administration are desired skills.
 
 1. **People skills.** We put a high value on communication: the ability to
    discuss ideas, explain your goals, report progress, and work kindly with more

content/docs/sidebar.json

@@ -1,6 +1,7 @@
 [
   {
-    "slug": "home",
+    "slug": "",
+    "label": "Home",
     "source": "index.md"
   },
   {

redirects-list.json

@@ -19,7 +19,6 @@
   "^/((?:deb|rpm)/.+)                                                                     https://s3-us-east-2.amazonaws.com/dvc-s3-repo/$1 303",
   "^/(?:help|chat)/?$                                                                     https://discordapp.com/invite/dvwXA2N 303",
   "^/(?:docs|documentation)(/.*)?$                                                        /doc$1",
-  "^/doc/?$                                                                               /doc/home 307",
   "^/doc/get-started(/.*)?$                                                               /doc/tutorials/get-started$1",
   "^/doc/tutorial/?$                                                                      /doc/tutorials",
   "^/doc/tutorial/(.*)?                                                                   /doc/tutorials/deep/$1",

src/gatsby/models/docs/onCreateMarkdownContentNode.js

@@ -9,11 +9,7 @@ function createMarkdownDocsNode(api, { parentNode }) {
   const { name, relativePath } = parentNode
   splitDir[0] = 'doc'
 
-  // Make a special exemption for the root doc.
-  const slug =
-    parentNode.relativePath === 'docs/index.md'
-      ? '/doc/home'
-      : path.posix.join('/', ...splitDir, name === 'index' ? '/' : name)
+  const slug = path.posix.join('/', ...splitDir, name === 'index' ? '' : name)
 
   const fieldData = {
     slug,

src/utils/shared/sidebar.js

@@ -28,7 +28,7 @@ const FILE_EXTENSION = '.md'
 function validateRawItem({ slug, source, children }) {
   const isSourceDisabled = source === false
 
-  if (!slug) {
+  if (typeof slug !== 'string') {
     throw Error("'slug' field is required in objects in sidebar.json")
   }