.github: add a new external link checker (pingcap#7121)

.github/exclude-links.txt

@@ -0,0 +1,19 @@
+http://\$ip:10080/
+http://grafana_ip:3000/
+http://__grafana_ip__:3000
+http:/ip:status_port/config
+http:/pd_ip:pd_port/
+http:/DASHBOARD_IP:PORT/
+https://download.pingcap.org
+https://kms.us-west-2.amazonaws.com/
+http://9.9.9.9:2379/
+http://ip:2379/
+http://spark-master-hostname:8080/
+http:/\$%7Btidb-server-ip%7D:\$%7Btidb-server-status-port%7D/
+http:/\$%7BPD_IP%7D:\$%7BPD_PORT%7D
+http://__tidb_ip__:10080
+https://s3.amazonaws.com/
+http:/192.168.0.16:2379
+http:/192.168.0.15:2379
+http:/192.168.0.14:2379
+https://www.crunchbase.com/organization/

.github/workflows/link.yaml

@@ -0,0 +1,31 @@
+name: Links
+
+on:
+  repository_dispatch:
+  workflow_dispatch:
+  schedule:
+    - cron: "0 0 * * 1"
+
+jobs:
+  linkChecker:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Link Checker
+        uses: lycheeverse/lychee-action@v1.1.1
+        with:
+          # For parameter description, see https://github.com/lycheeverse/lychee#commandline-parameters
+          args: -E --exclude-mail -v -i -n -a 429 -t 45 --exclude-file ./.github/exclude-links.txt -- **/*.md
+        env:
+          GITHUB_TOKEN: ${{secrets.GITHUB_TOKEN}}
+
+      - name: Create Issue From File
+        uses: peter-evans/create-issue-from-file@v3
+        with:
+          title: Broken Link Detected
+          content-filepath: ./lychee/out.md
+          assignees: TomShawn
+
+#      - name: Fail if there were link errors
+#        run: exit ${{ steps.lychee.outputs.exit_code }}

README.md

@@ -13,9 +13,9 @@ Currently, the official documentation supports two languages:
 
 You can use Google Translate to view the documentation in different languages. For example:
 
-- `fr`: [documentation in French](http://translate.google.com/translate?hl=en&sl=en&tl=fr&u=https%3A%2F%2Fgithub.com%2Fpingcap%2Fdocs%2Fblob%2Fmaster%2FTOC.md)
-- `ja`: [documentation in Japanese](http://translate.google.com/translate?hl=en&sl=en&tl=ja&u=https%3A%2F%2Fgithub.com%2Fpingcap%2Fdocs%2Fblob%2Fmaster%2FTOC.md)
-- `ko`: [documentation in Korean](http://translate.google.com/translate?hl=en&sl=en&tl=ko&u=https%3A%2F%2Fgithub.com%2Fpingcap%2Fdocs%2Fblob%2Fmaster%2FTOC.md)
+- `fr`: [documentation in French](https://translate.google.com/translate?hl=en&sl=en&tl=fr&u=https%3A%2F%2Fgithub.com%2Fpingcap%2Fdocs%2Fblob%2Fmaster%2FTOC.md)
+- `ja`: [documentation in Japanese](https://translate.google.com/translate?hl=en&sl=en&tl=ja&u=https%3A%2F%2Fgithub.com%2Fpingcap%2Fdocs%2Fblob%2Fmaster%2FTOC.md)
+- `ko`: [documentation in Korean](https://translate.google.com/translate?hl=en&sl=en&tl=ko&u=https%3A%2F%2Fgithub.com%2Fpingcap%2Fdocs%2Fblob%2Fmaster%2FTOC.md)
 
 ## Documentation versions
 

connectors-and-apis.md

@@ -44,7 +44,7 @@ The third-party APIs are not developed by Oracle. The following table lists the
 
 | Environment    | API                                      | Type                             | Notes                                    |
 | -------------- | ---------------------------------------- | -------------------------------- | ---------------------------------------- |
-| Ada            | GNU Ada MySQL Bindings                   | `libmysqlclient`                 | See [MySQL Bindings for GNU Ada](http://gnade.sourceforge.net/) |
+| Ada            | GNU Ada MySQL Bindings                   | `libmysqlclient`                 | See MySQL Bindings for GNU Ada. |
 | C              | C API                                    | `libmysqlclient`                 | See [MySQL C API](https://dev.mysql.com/doc/refman/5.7/en/c-api-info.html) |
 | C++            | Connector/C++                            | `libmysqlclient`                 | See [MySQL Connector/C++ Developer Guide](https://dev.mysql.com/doc/connector-cpp/en/) |
 |                | MySQL++                                  | `libmysqlclient`                 | See [MySQL++ Web site](http://tangentsoft.net/mysql++/doc/) |