Remove use of site-shared as a git submodule (#12494)

Simplifies site contribution setup and slightly reduces CI workflow
times.

We temporarily need to vendor the inject_dartpad script but that will go
away in the future once we use it as a library from Jaspr code.

Helps prepare for #12405

Author: parlough

.devcontainer/devcontainer.json

@@ -21,14 +21,6 @@ updates:
       - "auto.dependencies"
       - "auto.npm"
       - "lang.javascript"
-  # Automatically update submodules
-  - package-ecosystem: 'gitsubmodule'
-    directory: '/'
-    schedule:
-      interval: 'daily'
-    labels:
-      - "auto.dependencies"
-      - "auto.submodules"
   - package-ecosystem: "pub"
     versioning-strategy: "increase-if-necessary"
     directories:

.github/dependabot.yml

@@ -34,8 +34,6 @@ jobs:
     continue-on-error: ${{ matrix.experimental }}
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
-        with:
-          submodules: recursive
       - uses: subosito/flutter-action@e938fdf56512cc96ef2f93601a5a40bde3801046
         with:
           channel: ${{ matrix.branch }}
@@ -58,8 +56,6 @@ jobs:
     if: github.repository == 'flutter/website'
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
-        with:
-          submodules: recursive
       - uses: dart-lang/setup-dart@e51d8e571e22473a2ddebf0ef8a2123f0ab2c02c
         with:
           sdk: beta
@@ -74,8 +70,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
-        with:
-          submodules: recursive
       - name: Enable Corepack
         run: npm i -g corepack@latest && corepack enable
       - uses: actions/setup-node@a0853c24544627f65ddf259abe73b1d18a591444
@@ -104,8 +98,6 @@ jobs:
     if: github.repository == 'flutter/website'
     steps:
       - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8
-        with:
-          submodules: recursive
       - uses: dart-lang/setup-dart@e51d8e571e22473a2ddebf0ef8a2123f0ab2c02c
         with:
           sdk: beta

.github/workflows/test.yml

@@ -22,5 +22,5 @@ package-lock.json
 pubspec.lock
 tmp/
 
-# Temporary as codelabs used to be a submodule
-examples/codelabs
+# Temporary as site-shared used to be a submodule.
+site-shared/

.gitignore

@@ -38,7 +38,6 @@
     workspace = {
       # Runs when a workspace is first created
       onCreate = {
-        get-submodule = "git submodule update --init --recursive";
         pnpm-install = "pnpm install";
       };
       # Runs when the workspace is (re)started

.gitmodules

@@ -75,10 +75,6 @@ you probably don't need to build this site.
 Often you can make changes using the GitHub UI.
 If needed, we can stage the changes automatically in your pull request.
 
-> [!IMPORTANT] 
-> If you are cloning this repository locally,
-> follow the below instruction on cloning with its submodule.
-
 If your change involves code samples, adds/removes pages, or affects navigation,
 do consider building and testing your work before submitting.
 
@@ -133,52 +129,28 @@ follow the update instructions for how you originally installed it.
 [Node.js download archive]: https://nodejs.org/en/download/
 [nvm]: https://github.com/nvm-sh/nvm
 
-### Clone this repo and its submodules
-
-> [!NOTE]
-> This repository has git _submodules_, which affects how you clone it.
-> The GitHub documentation has general help on
-> [forking][] and [cloning][] repos.
+### Clone this repo
 
 If you're not a member of the Flutter organization,
-we recommend you **create a fork** of this repo under your own account,
+we recommend you [create a fork][] of this repo under your own account,
 and then submit a PR from that fork.
 
 Once you have a fork (or you're a Flutter org member),
-_choose one_ of the following submodule-cloning techniques:
-
-1. Clone the repo and its submodule at the same time
-   using the `--recurse-submodules` option:
-
-   ```console
-   git clone --recurse-submodules https://github.com/flutter/website.git
-   ```
+clone the repository with `git clone`:
 
-2. If you've already cloned the repo without its submodule,
-   then run this command from the root of the repository:
-
-   ```console
-   git submodule update --init --recursive
-   ```
-
-> [!NOTE]
-> At any time during development
-> you can use the `git submodule` command to refresh submodules:
->
-> ```console
-> git pull && git submodule update --init --recursive
-> ```
+```bash
+git clone https://github.com/flutter/website.git
+```
 
-[cloning]: https://docs.github.com/repositories/creating-and-managing-repositories/cloning-a-repository
-[forking]: https://docs.github.com/pull-requests/collaborating-with-pull-requests/working-with-forks/fork-a-repo
+[create a fork]: https://docs.github.com/pull-requests/collaborating-with-pull-requests/working-with-forks/fork-a-repo
 
 ## Set up your local environment and serve changes
 
 Before you continue setting up the site infrastructure,
 verify the correct versions of Flutter and Node.js are set up and available by
 following the instructions in [Get the prerequisites](#get-the-prerequisites).
 
-1. _Optional:_ After cloning the repo and its submodules,
+1. _Optional:_ After cloning the repo,
    create a branch for your changes:
 
    ```console

.idx/dev.nix

@@ -1,2 +1,2 @@
 analyzer:
-  exclude: [_site, flutter, site-shared, src, tmp]
+  exclude: [_site, flutter, src, tmp]

README.md

@@ -1,6 +1,4 @@
 steps:
-  - name: gcr.io/cloud-builders/git
-    args: ['submodule', 'update', '--init', '--recursive']
   - name: gcr.io/cloud-builders/git
     args: ['fetch', '--unshallow']
   - name: gcr.io/flutter-dev-230821/firebase-ghcli

analysis_options.yaml

@@ -1,8 +1,6 @@
 steps:
-  - name: gcr.io/cloud-builders/git
-    args: ['submodule', 'update', '--init', '--recursive']
   - name: gcr.io/flutter-dev-230821/firebase-ghcli
-    # Set up, build, deploy site to staging, then comment link on PR
+    # Build the site, deploy it to staging, then comment the link on the PR.
     entrypoint: '/bin/bash'
     args:
       - '-c'