feat: add an install script for easy install (#95)

install.sh

@@ -0,0 +1,89 @@
+#!/usr/bin/env bash
+
+ARCH="$(uname -m)"
+OS="$(uname)"
+
+# convert to standard arch names used in files
+if [ "x${ARCH}" = "xx86_64" ]; then
+    ARCH="amd64"
+fi
+
+# convert to standard os names used in files
+# TODO: support Windows
+if [ "x${OS}" = "xDarwin" ]; then
+    OS="darwin"
+else
+    OS="linux"
+fi
+
+# either specify the version in an environment variable or get the latest from GitHub
+if [ "x${ADC_VERSION}" = "x" ]; then
+    ADC_VERSION=$(curl -L -s https://github.com/api7/adc/releases/latest |
+        grep "adc/releases/tag/" | head -1 | awk -F '"' '{print $4}' |
+        awk -F '/' '{print $NF}')
+fi
+
+if [ "x${ADC_VERSION}" = "x" ]; then
+    printf "Unable to find the latest version of ADC. Please set the ADC_VERSION environment variable and try again. For example, export ADC_VERSION=0.5.0\n"
+    exit 1
+fi
+
+# if version has v in prefix, remove it
+ADC_VERSION=${ADC_VERSION#v}
+
+FILENAME="adc_${ADC_VERSION}_${OS}_${ARCH}.tar.gz"
+
+# example download URL format: https://github.com/api7/adc/releases/download/v0.5.0/adc_0.5.0_darwin_arm64.tar.gz
+URL="https://github.com/api7/adc/releases/download/v${ADC_VERSION}/${FILENAME}"
+
+printf "Downloading ADC v${ADC_VERSION} for ${OS} ${ARCH}...\n\n"
+# printf "Download URL: %s\n" "$URL"
+
+curl -L ${URL} -o ${PWD}/adc.tar.gz
+if [ $? -ne 0 ]; then
+    echo "Error downloading ADC. Please check your internet connection and try again."
+    exit 1
+fi
+
+# temporary folder name to extract the downloaded file
+TEMP_FOLDER_NAME=$(tr -dc A-Za-z0-9 </dev/urandom 2>/dev/null | head -c 16)
+if [ -z "$TEMP_FOLDER_NAME" ]; then
+    TEMP_FOLDER_NAME="TEMP_ADC_FOLDER"
+fi
+
+mkdir $TEMP_FOLDER_NAME
+
+printf "\nExtracting ADC to temporary folder %s...\n" "$TEMP_FOLDER_NAME"
+
+tar -xzf "${PWD}/adc.tar.gz" -C "${PWD}/${TEMP_FOLDER_NAME}"
+if [ $? -ne 0 ]; then
+    echo "Error extracting ADC. The downloaded file might be corrupted. Please try again and make sure that you are installing the correct version."
+    exit 1
+fi
+
+INSTALL_DIR=${ADC_DIR}
+if [ -z "$INSTALL_DIR" ]; then
+    INSTALL_DIR="/usr/local/bin"
+fi
+
+printf "Installing ADC in $INSTALL_DIR...\n"
+
+WHOAMI=$(whoami)
+
+# install adc binary, use sudo if user doesn't have permission to install in INSTALL_DIR
+if mv "${PWD}/$TEMP_FOLDER_NAME/adc" "$INSTALL_DIR/adc" >/dev/null 2>&1; then
+    echo "ADC installed successfully!"
+else
+    if sudo mv ${PWD}/$TEMP_FOLDER_NAME/adc $INSTALL_DIR/adc; then
+        echo "ADC installed successfully with sudo permissions!"
+    else
+        echo "Unable to install ADC. Please check the permissions of the user $WHOAMI for the directory $INSTALL_DIR."
+        exit 1
+    fi
+fi
+
+# clean up temporary files
+printf "Removing temporary files...\n"
+rm -rf adc.tar.gz ${PWD}/$TEMP_FOLDER_NAME/
+
+printf "Done!\n"