added swift support

images/linux/scripts/installers/swift.sh

@@ -0,0 +1,24 @@
+#!/bin/bash
+################################################################################
+##  File:  swift.sh
+##  Desc:  Installs Swift
+################################################################################
+
+# Install # Install
+image_label="$(lsb_release -rs)"
+wget https://swift.org/builds/swift-5.1.5-release/ubuntu${image_label//./}/swift-5.1.5-RELEASE/swift-5.1.5-RELEASE-ubuntu$image_label.tar.gz
+tar xzf swift-5.1.5-RELEASE-ubuntu$image_label.tar.gz
+sudo mv swift-5.1.5-RELEASE-ubuntu$image_label /usr/share/swift
+sudo echo "PATH=/usr/share/swift/usr/bin:$PATH" | sudo tee -a /etc/environment
+source  ~/.bashrc
+
+# 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 ! command -v swift; then
+    echo "Swift was not installed"
+    exit 1
+fi
+
+# Document what was added to the image
+echo "Lastly, documenting what we added to the metadata file"
+DocumentInstalledItem "$(swift --version)"