Merge pull request #1 from githedgehog/add_fabric_tester_testfab

adding testfab (fabric tester) installer file.

Author: mkoperator

testfab

@@ -0,0 +1,100 @@
+#!/usr/bin/env bash
+
+# Copyright The Hedgehog Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# The install script is based off of the Helm v3 install script:
+# https://github.com/helm/helm/blob/main/scripts/get-helm-3
+
+: ${BINARY_NAME:="testfab"}
+: ${USE_SUDO:="true"}
+: ${DEBUG:="false"}
+: ${INSTALL_DIR:="/usr/local/bin"}
+: ${TAG:="latest"}
+
+HAS_ORAS="$(type "oras" &> /dev/null && echo true || echo false)"
+
+# initArch discovers the architecture for this system.
+initArch() {
+  ARCH=$(uname -m)
+  case $ARCH in
+    armv5*) ARCH="armv5";;
+    armv6*) ARCH="armv6";;
+    armv7*) ARCH="arm";;
+    aarch64) ARCH="arm64";;
+    x86) ARCH="386";;
+    x86_64) ARCH="amd64";;
+    i686) ARCH="386";;
+    i386) ARCH="386";;
+  esac
+}
+
+# initOS discovers the operating system for this system.
+initOS() {
+  OS=$(echo `uname`|tr '[:upper:]' '[:lower:]')
+
+  case "$OS" in
+    # Minimalist GNU for Windows
+    mingw*|cygwin*) OS='windows';;
+  esac
+}
+
+# runs the given command as root (detects if we are root already)
+runAsRoot() {
+  HOME=${HOME:-/tmp}
+  if [ $EUID -ne 0 -a "$USE_SUDO" = "true" ]; then
+    sudo HOME=$HOME "${@}"
+  else
+    HOME=$HOME "${@}"
+  fi
+}
+
+# verifySupported checks that the os/arch combination is supported for
+# binary builds, as well whether or not necessary tools are present.
+verifySupported() {
+  local supported="linux-amd64"
+  if ! echo "${supported}" | grep -q "${OS}-${ARCH}"; then
+    echo "No prebuilt binary for ${OS}-${ARCH}."
+    echo "To build from source, go to https://github.com/githedgehog/testfab"
+    exit 1
+  fi
+
+  if [ "${HAS_ORAS}" != "true" ] ; then
+    echo "Oras required, you can install it by running: curl -fsSL https://i.hhdev.io/oras | bash"
+    exit 1
+  fi
+}
+
+installFile() {
+  runAsRoot oras pull -o /usr/local/bin/ ghcr.io/githedgehog/testfab:"${TAG}"
+  runAsRoot chmod +x /usr/local/bin/testfab
+
+  echo "$BINARY_NAME installed into $INSTALL_DIR/$BINARY_NAME"
+}
+
+# Execution
+
+#Stop execution on any error
+set -e
+set -o pipefail
+
+# Set debug if desired
+if [ "${DEBUG}" == "true" ]; then
+  set -x
+fi
+
+initArch
+initOS
+verifySupported
+installFile