Merge pull request #1425 from PowerShell/RaghuS-Demo

Install script for *nix platforms

demos/0-Install.sh.ps1

@@ -1,17 +0,0 @@
-#region Download the package from GitHub to Ubuntu (14/16)
-# TODO: Update the url
-# TODO: Update to apt-get, if that is available
-curl https://github.com/PowerShell/PowerShell/releases/download/v0.5.0/powershell_0.5.0-1_amd64.deb
-#endregion
-
-#region Install PowerShell and its dependencies
-# TODO: Fix the version
-sudo apt-get install libunwind8 libicu52
-sudo dpkg -i powershell_0.5.0-1_amd64.deb
-#endregion
-
-#region Launch PowerShell
-# TODO: Launch a new terminal
-clear
-PowerShell
-#endregion

demos/Install.sh

@@ -0,0 +1,102 @@
+#!/usr/bin/env bash
+
+clear
+echo "Script to download latest release of PowerShell on *nix platforms" 
+
+echo "Verify if GITHUB_TOKEN variable is defined"
+[[ -n $GITHUB_TOKEN ]] || { echo >&2 "GITHUB_TOKEN variable is undefined, Generate one using https://help.github.com/articles/creating-an-access-token-for-command-line-use/"; exit 1; }
+
+# Authorizes with read-only access to GitHub API
+curl_() {
+    curl -s -i -H "Authorization: token $GITHUB_TOKEN" "$@"
+}
+
+# Retrieves asset ID and package name of asset ending in argument
+# $info looks like: "id": 1698239, "name": "powershell_0.4.0-1_amd64.deb",
+get_info() {
+    curl_ https://api.github.com/repos/PowerShell/PowerShell/releases/latest | grep -B 1 "name.*$1"
+}
+
+echo "Get OS specific asset ID and package name"
+case "$OSTYPE" in
+    linux*)
+        source /etc/os-release
+        echo $ID
+        # Install curl and wget to download package
+        case "$ID" in
+            centos*)
+                sudo yum install -y curl wget
+                info=$(get_info rpm)
+                ;;
+            ubuntu)
+                sudo apt-get install -y curl wget
+                info=$(get_info deb)
+                ;;
+            *)
+                exit 2 >&2 "Package $NAME is not supported on $OSTYPE!"
+        esac
+        ;;
+    darwin*)
+        info=$(get_info pkg)
+        ;;
+    *)
+        exit 2 >&2 "$OSTYPE is not supported!"
+        ;;
+esac
+
+# Parses $info for asset ID and package name
+read asset package <<< $(echo $info | sed 's/[,"]//g' | awk '{ print $2; print $4 }')
+
+# Downloads asset to file
+curl_ -H 'Accept: application/octet-stream' https://api.github.com/repos/PowerShell/PowerShell/releases/assets/$asset |
+    grep location | sed 's/location: //g' | wget -i - -O $package
+
+# Installs PowerShell package
+case "$OSTYPE" in
+    linux*)
+        source /etc/os-release
+        # Install dependencies
+        case "$ID" in
+            centos)
+                sudo yum install -y libicu libunwind
+                sudo yum install "./$package"
+                ;;
+            ubuntu)
+                sudo apt-get install -y libunwind8 libicu52
+                sudo dpkg -i "./$package"
+                ;;
+            *)
+        esac
+        ;;
+    darwin*)
+        sudo installer -pkg ./$package -target /
+        ;;
+esac
+
+get_smadll_location() {
+    dpkg-query --listfiles PowerShell | grep "System.Management.Automation.dll"
+}
+
+get_powershell_location() {
+    dirname $(get_smadll_location)
+}
+
+get_powershell_symlink() {
+	dir /usr/bin/powershell
+}
+
+install_location=$(get_powershell_location)
+powershell_symlink=$(get_powershell_symlink)
+
+if [ $install_location ]
+then
+	echo "Congratulations! PowerShell \"$package\" is installed @ \"$install_location\""
+fi
+
+if [ $powershell_symlink ]
+then
+	echo "Symlink is available @ \"$powershell_symlink\""
+else
+	echo "PowerShell install failed! Check this script's output for information"
+	exit -1
+fi