Install GitHUB CLI on Ubuntu (#851)

* Install GitHub CLI on linux images

* Install latest release

* remove unneeded sudo

* Remove help cli options

* Add helper doc

* Resolve comments

Co-authored-by: Sergey Dolin <v-sedoli@micorosoft.com>

images/linux/scripts/installers/github-cli.sh

@@ -0,0 +1,26 @@
+#!/bin/bash
+################################################################################
+##  File:  github-cli.sh
+##  Desc:  Installs GitHub CLI
+##         Must be run as non-root user after homebrew
+################################################################################
+
+# Source the helpers for use with the script
+source $HELPER_SCRIPTS/document.sh
+
+# Install GitHub CLI
+url=$(curl -s https://api.github.com/repos/cli/cli/releases/latest | jq -r '.assets[].browser_download_url|select(contains("linux") and contains("amd64") and contains(".deb"))')
+wget $url
+apt install ./gh_*_linux_amd64.deb
+rm gh_*_linux_amd64.deb
+
+# Run tests to determine that the software installed as expected
+echo "Testing to make sure that script performed as expected, and basic scenarios work"
+if ! gh --version; then
+    echo "GitHub CLI was not installed"
+    exit 1
+fi
+
+# Document what was added to the image
+echo "Lastly, documenting what we added to the metadata file"
+DocumentInstalledItem "GitHub CLI $(gh --version|awk 'FNR==1 {print $3}')"

images/linux/ubuntu1604.json

@@ -197,6 +197,7 @@
                 "{{template_dir}}/scripts/installers/gcc.sh",
                 "{{template_dir}}/scripts/installers/gfortran.sh",
                 "{{template_dir}}/scripts/installers/git.sh",
+                "{{template_dir}}/scripts/installers/github-cli.sh",
                 "{{template_dir}}/scripts/installers/google-chrome.sh",
                 "{{template_dir}}/scripts/installers/google-cloud-sdk.sh",
                 "{{template_dir}}/scripts/installers/haskell.sh",

images/linux/ubuntu1804.json

@@ -200,6 +200,7 @@
                 "{{template_dir}}/scripts/installers/gcc.sh",
                 "{{template_dir}}/scripts/installers/gfortran.sh",
                 "{{template_dir}}/scripts/installers/git.sh",
+                "{{template_dir}}/scripts/installers/github-cli.sh",
                 "{{template_dir}}/scripts/installers/google-chrome.sh",
                 "{{template_dir}}/scripts/installers/google-cloud-sdk.sh",
                 "{{template_dir}}/scripts/installers/haskell.sh",