Add installation script for Linux OSes (#13)

* Add installation script for Linux OSes

* install to /usr/local/bin/benchi

* print version

* print version

* hopefully standardize shell stuff

* update installation instructions

Author: hariso

README.md

@@ -30,6 +30,12 @@ install it using Go:
 go install github.com/conduitio/benchi/cmd/benchi@latest
 ```
 
+Alternatively, you can install just the Benchi binary on a Linux OS with:
+
+```shell
+curl https://raw.githubusercontent.com/ConduitIO/benchi/main/install.sh | sh
+```
+
 ## Usage
 
 ### Running Benchmarks

install.sh

@@ -0,0 +1,232 @@
+#!/bin/bash
+
+# Copyright © 2024 Meroxa, Inc.
+#
+# 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 MIT-licensed script from glide,
+# the package manager for Go: https://github.com/Masterminds/glide.sh/blob/master/get
+
+PROJECT_NAME="benchi"
+
+# Define color codes
+reset="\033[0m"
+conduit_blue="\033[38;5;45m"
+red="\033[31m"
+
+fail() {
+  echo "$1"
+  exit 1
+}
+
+# Function to print a string in bright blue
+coloredEcho() {
+  local text=$1
+  printf "${conduit_blue}${text}${reset}\n"
+}
+
+initArch() {
+  ARCH=$(uname -m)
+  case $ARCH in
+  aarch64) ARCH="arm64" ;;
+  arm64) ARCH="arm64" ;;
+  x86) ARCH="i386" ;;
+  x86_64) ARCH="x86_64" ;;
+  i686) ARCH="i386" ;;
+  i386) ARCH="i386" ;;
+  *)
+    fail "Error: Unsupported architecture: $ARCH"
+    ;;
+  esac
+}
+
+initOS() {
+  OS=$(echo $(uname))
+  # We support Linux and Darwin, Windows (mingw, msys) are not supported.
+  if [[ "$OS" != "Linux" && "$OS" != "Darwin" ]]; then
+    fail "Error: Unsupported operating system: $OS"
+  fi
+}
+
+initDownloadTool() {
+  if type "curl" >/dev/null; then
+    DOWNLOAD_TOOL="curl"
+  elif type "wget" >/dev/null; then
+    DOWNLOAD_TOOL="wget"
+  else
+    fail "You need 'curl' or 'wget' as a download tool. Please install it first before continuing."
+  fi
+}
+
+getLatestTag() {
+  # GitHub releases URL
+  local url="https://github.com/ConduitIO/benchi/releases/latest"
+  local latest_url # Variable to store the redirected URL
+
+  # Check if DOWNLOAD_TOOL is set to curl or wget
+  if [[ "$DOWNLOAD_TOOL" == "curl" ]]; then
+    # Use curl to get the redirected link
+    latest_url=$(curl -sL -o /dev/null -w "%{url_effective}" "$url")
+  elif [[ "$DOWNLOAD_TOOL" == "wget" ]]; then
+    # Use wget to get the redirected link
+    latest_url=$(wget --spider --server-response --max-redirect=2 "$url" 2>&1 | grep "Location" | tail -1 | awk '{print $2}')
+  else
+    fail "Error: DOWNLOAD_TOOL is not set or not recognized. Use 'curl' or 'wget'."
+  fi
+
+  # Extract the tag from the redirected URL (everything after the last "/")
+  TAG=$(echo "$latest_url" | grep -oE "[^/]+$")
+}
+
+get() {
+  local url="$2"
+  local body
+  local httpStatusCode
+  echo "Getting $url"
+  if [ "$DOWNLOAD_TOOL" = "curl" ]; then
+    httpResponse=$(curl -sL --write-out HTTPSTATUS:%{http_code} "$url")
+    httpStatusCode=$(echo $httpResponse | tr -d '\n' | sed -e 's/.*HTTPSTATUS://')
+    body=$(echo "$httpResponse" | sed -e 's/HTTPSTATUS\:.*//g')
+  elif [ "$DOWNLOAD_TOOL" = "wget" ]; then
+    tmpFile=$(mktemp)
+    body=$(wget --server-response --content-on-error -q -O - "$url" 2>$tmpFile || true)
+    httpStatusCode=$(cat $tmpFile | awk '/^  HTTP/{print $2}' | tail -1)
+    rm -f $tmpFile
+  fi
+  if [ "$httpStatusCode" != 200 ]; then
+    echo "Request fail with http status code $httpStatusCode"
+    fail "Body: $body"
+  fi
+  eval "$1='$body'"
+}
+
+getFile() {
+  local url="$1"
+  local filePath="$2"
+  local httpStatusCode
+
+  if [ "$DOWNLOAD_TOOL" = "curl" ]; then
+    httpStatusCode=$(curl --progress-bar -w '%{http_code}' -L "$url" -o "$filePath")
+    echo "$httpStatusCode"
+  elif [ "$DOWNLOAD_TOOL" = "wget" ]; then
+    tmpFile=$(mktemp)
+    wget --server-response --content-on-error -q -O "$filePath" "$url" 2>$tmpFile
+    if [ $? -ne 0 ]; then
+      httpStatusCode=$(cat $tmpFile | awk '/^  HTTP/{print $2}' | tail -1)
+      rm -f $tmpFile
+      echo "$httpStatusCode"
+      return 1
+    fi
+    rm -f $tmpFile
+    echo "200"
+  fi
+}
+
+install() {
+  coloredEcho "Installing Benchi $TAG..."
+  printf "\n"
+
+  local version="${TAG#v}" # Remove the leading 'v' from TAG and store it in 'version'
+  BENCHI_DIST="benchi_${version}_${OS}_${ARCH}.tar.gz"
+  EXTRACTION_DIR="/tmp/benchi_${version}_${OS}_${ARCH}"
+
+  DOWNLOAD_URL="https://github.com/ConduitIO/benchi/releases/download/$TAG/$BENCHI_DIST"
+  BENCHI_TMP_FILE="/tmp/$BENCHI_DIST"
+  echo "Downloading $DOWNLOAD_URL"
+
+  # Download the file
+  httpStatusCode=$(getFile "$DOWNLOAD_URL" "$BENCHI_TMP_FILE")
+  if [ "$httpStatusCode" -ne 200 ]; then
+    echo "Did not find a release for your system: $OS $ARCH"
+    echo "Trying to find a release on the github api."
+    LATEST_RELEASE_URL="https://api.github.com/repos/conduitio/$PROJECT_NAME/releases/tags/$TAG"
+    get LATEST_RELEASE_JSON $LATEST_RELEASE_URL
+    # || true forces this command to not catch error if grep does not find anything
+    DOWNLOAD_URL=$(echo "$LATEST_RELEASE_JSON" | grep 'browser_' | cut -d\" -f4 | grep "$BENCHI_DIST") || true
+    if [ -z "$DOWNLOAD_URL" ]; then
+      echo "Sorry, we dont have a dist for your system: $OS $ARCH"
+      fail "You can ask one here: https://github.com/conduitio/$PROJECT_NAME/issues"
+    else
+      echo "Downloading $DOWNLOAD_URL"
+      httpStatusCode=$(getFile "$DOWNLOAD_URL" "$BENCHI_TMP_FILE")
+      if [ "$httpStatusCode" -ne 200 ]; then
+        fail "Failed to download from $DOWNLOAD_URL"
+      fi
+    fi
+  fi
+
+  # Create extraction directory if it doesn't exist
+  mkdir -p "$EXTRACTION_DIR"
+  if [ $? -ne 0 ]; then
+    fail "Failed to create extraction directory $EXTRACTION_DIR"
+  fi
+
+  # Extract the tar file
+  tar -xf "$BENCHI_TMP_FILE" -C "$EXTRACTION_DIR"
+  if [ $? -ne 0 ]; then
+    fail "Failed to extract $BENCHI_TMP_FILE to $EXTRACTION_DIR"
+  fi
+
+  # Check if binary exists after extraction
+  if [ ! -f "$EXTRACTION_DIR/benchi" ]; then
+    fail "Could not find benchi binary in extracted files"
+  fi
+
+  # Move the binary to /usr/local/bin with sudo (since it requires admin privileges)
+  sudo mv "$EXTRACTION_DIR/benchi" /usr/local/bin/
+  if [ $? -ne 0 ]; then
+    fail "Failed to move benchi to /usr/local/bin/"
+  fi
+
+  # Make sure it has the correct permissions
+  sudo chmod 755 /usr/local/bin/benchi
+  if [ $? -ne 0 ]; then
+    fail "Failed to set permissions on /usr/local/bin/benchi"
+  fi
+
+  # Clean up temporary files
+  rm -f "$BENCHI_TMP_FILE"
+  rm -rf "$EXTRACTION_DIR"
+}
+
+bye() {
+  result=$?
+  if [ "$result" != "0" ]; then
+    echo -e "${red}Failed to install Benchi${reset}"
+  fi
+  exit $result
+}
+
+testVersion() {
+  set +e
+  BENCHI_BIN="$(which $PROJECT_NAME)"
+  if [ "$?" = "1" ]; then
+    fail "$PROJECT_NAME not found."
+  fi
+  set -e
+  BENCHI_VERSION=$($PROJECT_NAME -v)
+  coloredEcho "\n$BENCHI_VERSION installed successfully"
+}
+
+# Execution
+
+#Stop execution on any error
+trap "bye" EXIT
+set -e
+
+initArch
+initOS
+initDownloadTool
+getLatestTag
+install
+testVersion