Merge branch 'source-install-yarn-2' into 'master'

Install 'yarn' globally to avoid PATH issues

See merge request !13273

doc/install/installation.md

@@ -168,8 +168,10 @@ are out of date, so we'll need to install through the following commands:
     curl --location https://deb.nodesource.com/setup_7.x | sudo bash -
     sudo apt-get install -y nodejs
-    # install yarn
-    curl --location https://yarnpkg.com/install.sh | bash -
+    curl --silent --show-error https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+    echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+    sudo apt-get update
+    sudo apt-get install yarn
 Visit the official websites for [node](https://nodejs.org/en/download/package-manager/) and [yarn](https://yarnpkg.com/en/docs/install/) if you have any trouble with these steps.

doc/update/8.17-to-9.0.md

@@ -65,7 +65,10 @@ Since 8.17, GitLab requires the use of yarn `>= v0.17.0` to manage
 JavaScript dependencies.
 ```bash
-curl --location https://yarnpkg.com/install.sh | bash -
+curl --silent --show-error https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+sudo apt-get update
+sudo apt-get install yarn
 ```
 More information can be found on the [yarn website](https://yarnpkg.com/en/docs/install).

doc/update/9.0-to-9.1.md

@@ -65,7 +65,10 @@ Since 8.17, GitLab requires the use of yarn `>= v0.17.0` to manage
 JavaScript dependencies.
 ```bash
-curl --location https://yarnpkg.com/install.sh | bash -
+curl --silent --show-error https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+sudo apt-get update
+sudo apt-get install yarn
 ```
 More information can be found on the [yarn website](https://yarnpkg.com/en/docs/install).

doc/update/9.1-to-9.2.md

@@ -65,7 +65,10 @@ Since 8.17, GitLab requires the use of yarn `>= v0.17.0` to manage
 JavaScript dependencies.
 ```bash
-curl --location https://yarnpkg.com/install.sh | bash -
+curl --silent --show-error https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+sudo apt-get update
+sudo apt-get install yarn
 ```
 More information can be found on the [yarn website](https://yarnpkg.com/en/docs/install).

doc/update/9.2-to-9.3.md

@@ -65,7 +65,10 @@ Since 8.17, GitLab requires the use of yarn `>= v0.17.0` to manage
 JavaScript dependencies.
 ```bash
-curl --location https://yarnpkg.com/install.sh | bash -
+curl --silent --show-error https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+sudo apt-get update
+sudo apt-get install yarn
 ```
 More information can be found on the [yarn website](https://yarnpkg.com/en/docs/install).

doc/update/9.3-to-9.4.md

@@ -65,7 +65,10 @@ Since 8.17, GitLab requires the use of yarn `>= v0.17.0` to manage
 JavaScript dependencies.
 ```bash
-curl --location https://yarnpkg.com/install.sh | bash -
+curl --silent --show-error https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
+echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
+sudo apt-get update
+sudo apt-get install yarn
 ```
 More information can be found on the [yarn website](https://yarnpkg.com/en/docs/install).