build/mvn - auron - Git at Google

 #!/usr/bin/env bash

 #
 # Licensed to the Apache Software Foundation (ASF) under one or more
 # contributor license agreements.  See the NOTICE file distributed with
 # this work for additional information regarding copyright ownership.
 # The ASF licenses this file to You 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.
 #

 # Determine the current working directory
 _DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 # Preserve the calling directory
 _CALLING_DIR="$(pwd)"
 # Options used during compilation
 _COMPILE_JVM_OPTS="-Xms2g -Xmx2g -XX:ReservedCodeCacheSize=1g -Xss128m"

 if [ "$CI" ]; then
   export MAVEN_CLI_OPTS="--no-transfer-progress --errors --fail-fast"
 fi

 # ---------------------------------------------------------------
 # Function: install_app
 # Installs an application tarball if not already present.
 # Arguments:
 #   1 - Base URL of the tarball
 #   2 - Tarball name
 #   3 - Optional path to a binary to check for existing installation
 #   4 - Optional URL query suffix
 # ---------------------------------------------------------------
 install_app() {
   local remote_tarball="$1/$2$4"
   local local_tarball="${_DIR}/$2"
   local binary="${_DIR}/$3"
   local target_dir="${_DIR}/${3%/bin/mvn}"

   # setup `curl` and `wget` silent options if we're running on Jenkins
   local curl_opts="-L"
   local wget_opts=""
   curl_opts="--progress-bar ${curl_opts}"
   wget_opts="--progress=bar:force ${wget_opts}"

   # Check if Maven is already installed in target_dir
   # If valid, skip installation. Otherwise, remove and reinstallation.
   if [ -d "${target_dir}" ]; then
     if "$binary" --version >/dev/null 2>&1; then
       echo "[INFO] Valid Maven installation found at $binary. Skipping installation." 1>&2
       return 0
     else
       echo "[WARN] Invalid Maven installation detected at $binary. Cleaning up before reinstallation." 1>&2
       rm -rf "${target_dir}"
     fi
   fi

   # Check if the tarball already exists locally
   if [ -f "${local_tarball}" ]; then
       echo "[INFO] Found existing tarball ${local_tarball}, reusing it." 1>&2
   else
     # Download the tarball using curl or wget
     download_tool=""

     if [ $(command -v curl) ]; then
       echo "[INFO] Downloading with curl..." 1>&2
       if curl ${curl_opts} "${remote_tarball}" > "${local_tarball}"; then
         download_tool="curl"
       else
         echo "[WARN] curl download failed" 1>&2
       fi
     fi

     if [ -z "$download_tool" ] && [ $(command -v wget) ]; then
       echo "[INFO] Falling back to wget..." 1>&2
       if wget ${wget_opts} -O "${local_tarball}" "${remote_tarball}"; then
         download_tool="wget"
       else
         echo "[WARN] wget download failed" 1>&2
       fi
     fi

     if [ -z "$download_tool" ]; then
       echo -n "[ERROR] Cannot download $2 with cURL or wget; " 1>&2 && \
       echo "Ensure curl/wget works and network is up." 1>&2 && \
       exit 2
     fi

     echo "[INFO] Successfully downloaded with $download_tool" 1>&2
   fi

   # Extract tarball to target directory
   cd "${_DIR}"
   echo "[INFO] Extracting ${local_tarball} to ${target_dir}..." 1>&2
   if ! tar -xzf "${local_tarball}"; then
     echo "[INFO] Cleaning up partial files..." 1>&2
     echo "  - ${local_tarball}"
     echo "  - ${target_dir}"

     rm -f "${local_tarball}"
     rm -rf "${target_dir}"

     echo "[ERROR] Extraction failed. Please retry after cleaning up." 1>&2
     exit 2
   fi

   echo "[INFO] Removing downloaded tarball: ${local_tarball}" 1>&2
   rm -rf "$local_tarball"
 }

 # ---------------------------------------------------------------
 # Function: install_mvn
 # Detects Maven version from pom.xml and installs required Maven
 # if not present or version mismatch under build/.
 # ---------------------------------------------------------------
 install_mvn() {
   local MVN_REQUIRED_VERSION=`grep "<maven.version>" "${_DIR}/../pom.xml" | head -n1 | awk -F '[<>]' '{print $3}'`

   # Check if MVN_HOME is set and Maven binary exists
   if [ -n "$MVN_HOME" ]; then
     MVN_BIN="${MVN_HOME%/}/bin/mvn"
     if [ ! -x "$MVN_BIN" ]; then
       echo "[WARN] MVN_HOME is set but $MVN_BIN not found or not executable." 1>&2
     else
       echo "[INFO] Found mvn via MVN_HOME: $MVN_BIN" 1>&2
     fi
   else
     # Check if Maven is available in PATH
     MVN_BIN="$(command -v mvn || true)"
     if [ -z "$MVN_BIN" ]; then
       echo "[WARN] No Maven detected, will install required version" 1>&2
     else
       echo "[INFO] Found mvn via PATH: $MVN_BIN" 1>&2
     fi
   fi

   # Detect installed Maven version
    MVN_DETECTED_VERSION=""
    if [ -n "$MVN_BIN" ] && [ -x "$MVN_BIN" ]; then
      MVN_DETECTED_VERSION="$("$MVN_BIN" --version 2>/dev/null | head -n1 | awk '{print $3}' | grep -oE '[0-9]+\.[0-9]+\.[0-9]+')"
    fi

   # Helper function to normalize version for numeric comparison
   # See simple version normalization: http://stackoverflow.com/questions/16989598/bash-comparing-version-numbers
   function version { echo "$@" | awk -F. '{ printf("%03d%03d%03d\n", $1,$2,$3); }'; }

   # If version mismatch, download and install required Maven
   if [ "$(version "$MVN_DETECTED_VERSION")" -ne "$(version "$MVN_REQUIRED_VERSION")" ]; then
     echo "[WARN] Maven version mismatch:" 1>&2
     echo "       Detected: $MVN_DETECTED_VERSION" 1>&2
     echo "       Required: $MVN_REQUIRED_VERSION" 1>&2
     echo "[INFO] You can:" 1>&2
     echo "       1. Set MVN_HOME to point to a correct Maven installation" 1>&2
     echo "       2. Let this script download the required version automatically" 1>&2
     echo "[INFO] Proceeding with Maven setup..." 1>&2

     local APACHE_MIRROR=${APACHE_MIRROR:-'https://www.apache.org/dyn/closer.lua'}
     local MIRROR_URL_QUERY="?action=download"
     local MVN_TARBALL="apache-maven-${MVN_REQUIRED_VERSION}-bin.tar.gz"
     local FILE_PATH="maven/maven-3/${MVN_REQUIRED_VERSION}/binaries"

     # Check if the tarball exists on mirror, fallback if necessary
     if command -v curl >/dev/null 2>&1; then
       if ! curl -L --output /dev/null --silent --head --fail "${APACHE_MIRROR}/${FILE_PATH}/${MVN_TARBALL}${MIRROR_URL_QUERY}" ; then
         APACHE_MIRROR="https://archive.apache.org/dist"
         MIRROR_URL_QUERY=""
       fi
     fi

     # Download and install Maven
     install_app \
       "${APACHE_MIRROR}/${FILE_PATH}" \
       "${MVN_TARBALL}" \
       "apache-maven-${MVN_REQUIRED_VERSION}/bin/mvn" \
       "${MIRROR_URL_QUERY}"

     MVN_BIN="${_DIR}/apache-maven-${MVN_REQUIRED_VERSION}/bin/mvn"
   fi
 }

 # Execute Maven installation check
 install_mvn

 cd "${_CALLING_DIR}"

 # Set any `mvn` options if not already present
 export MAVEN_OPTS=${MAVEN_OPTS:-"$_COMPILE_JVM_OPTS"}

 # Final validation and Maven execution
 if [ -n "$MVN_BIN" ] && [ -x "$MVN_BIN" ]; then
   echo "[INFO] Using Maven: $MVN_BIN" 1>&2
   "$MVN_BIN" -version 1>&2
 else
   echo "[ERROR] No valid Maven installation found or executable is broken. Please try again." 1>&2
   exit 1
 fi

 # Execute Maven with provided arguments
 ${MVN_BIN} $MAVEN_CLI_OPTS "$@"
	#!/usr/bin/env bash

	#
	# Licensed to the Apache Software Foundation (ASF) under one or more
	# contributor license agreements. See the NOTICE file distributed with
	# this work for additional information regarding copyright ownership.
	# The ASF licenses this file to You 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.
	#

	# Determine the current working directory
	_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
	# Preserve the calling directory
	_CALLING_DIR="$(pwd)"
	# Options used during compilation
	_COMPILE_JVM_OPTS="-Xms2g -Xmx2g -XX:ReservedCodeCacheSize=1g -Xss128m"

	if [ "$CI" ]; then
	export MAVEN_CLI_OPTS="--no-transfer-progress --errors --fail-fast"
	fi

	# ---------------------------------------------------------------
	# Function: install_app
	# Installs an application tarball if not already present.
	# Arguments:
	# 1 - Base URL of the tarball
	# 2 - Tarball name
	# 3 - Optional path to a binary to check for existing installation
	# 4 - Optional URL query suffix
	# ---------------------------------------------------------------
	install_app() {
	local remote_tarball="$1/$2$4"
	local local_tarball="${_DIR}/$2"
	local binary="${_DIR}/$3"
	local target_dir="${_DIR}/${3%/bin/mvn}"

	# setup `curl` and `wget` silent options if we're running on Jenkins
	local curl_opts="-L"
	local wget_opts=""
	curl_opts="--progress-bar ${curl_opts}"
	wget_opts="--progress=bar:force ${wget_opts}"

	# Check if Maven is already installed in target_dir
	# If valid, skip installation. Otherwise, remove and reinstallation.
	if [ -d "${target_dir}" ]; then
	if "$binary" --version >/dev/null 2>&1; then
	echo "[INFO] Valid Maven installation found at $binary. Skipping installation." 1>&2
	return 0
	else
	echo "[WARN] Invalid Maven installation detected at $binary. Cleaning up before reinstallation." 1>&2
	rm -rf "${target_dir}"
	fi
	fi

	# Check if the tarball already exists locally
	if [ -f "${local_tarball}" ]; then
	echo "[INFO] Found existing tarball ${local_tarball}, reusing it." 1>&2
	else
	# Download the tarball using curl or wget
	download_tool=""

	if [ $(command -v curl) ]; then
	echo "[INFO] Downloading with curl..." 1>&2
	if curl ${curl_opts} "${remote_tarball}" > "${local_tarball}"; then
	download_tool="curl"
	else
	echo "[WARN] curl download failed" 1>&2
	fi
	fi

	if [ -z "$download_tool" ] && [ $(command -v wget) ]; then
	echo "[INFO] Falling back to wget..." 1>&2
	if wget ${wget_opts} -O "${local_tarball}" "${remote_tarball}"; then
	download_tool="wget"
	else
	echo "[WARN] wget download failed" 1>&2
	fi
	fi

	if [ -z "$download_tool" ]; then
	echo -n "[ERROR] Cannot download $2 with cURL or wget; " 1>&2 && \
	echo "Ensure curl/wget works and network is up." 1>&2 && \
	exit 2
	fi

	echo "[INFO] Successfully downloaded with $download_tool" 1>&2
	fi

	# Extract tarball to target directory
	cd "${_DIR}"
	echo "[INFO] Extracting ${local_tarball} to ${target_dir}..." 1>&2
	if ! tar -xzf "${local_tarball}"; then
	echo "[INFO] Cleaning up partial files..." 1>&2
	echo " - ${local_tarball}"
	echo " - ${target_dir}"

	rm -f "${local_tarball}"
	rm -rf "${target_dir}"

	echo "[ERROR] Extraction failed. Please retry after cleaning up." 1>&2
	exit 2
	fi

	echo "[INFO] Removing downloaded tarball: ${local_tarball}" 1>&2
	rm -rf "$local_tarball"
	}

	# ---------------------------------------------------------------
	# Function: install_mvn
	# Detects Maven version from pom.xml and installs required Maven
	# if not present or version mismatch under build/.
	# ---------------------------------------------------------------
	install_mvn() {
	local MVN_REQUIRED_VERSION=`grep "<maven.version>" "${_DIR}/../pom.xml" \| head -n1 \| awk -F '[<>]' '{print $3}'`

	# Check if MVN_HOME is set and Maven binary exists
	if [ -n "$MVN_HOME" ]; then
	MVN_BIN="${MVN_HOME%/}/bin/mvn"
	if [ ! -x "$MVN_BIN" ]; then
	echo "[WARN] MVN_HOME is set but $MVN_BIN not found or not executable." 1>&2
	else
	echo "[INFO] Found mvn via MVN_HOME: $MVN_BIN" 1>&2
	fi
	else
	# Check if Maven is available in PATH
	MVN_BIN="$(command -v mvn \|\| true)"
	if [ -z "$MVN_BIN" ]; then
	echo "[WARN] No Maven detected, will install required version" 1>&2
	else
	echo "[INFO] Found mvn via PATH: $MVN_BIN" 1>&2
	fi
	fi

	# Detect installed Maven version
	MVN_DETECTED_VERSION=""
	if [ -n "$MVN_BIN" ] && [ -x "$MVN_BIN" ]; then
	MVN_DETECTED_VERSION="$("$MVN_BIN" --version 2>/dev/null \| head -n1 \| awk '{print $3}' \| grep -oE '[0-9]+\.[0-9]+\.[0-9]+')"
	fi

	# Helper function to normalize version for numeric comparison
	# See simple version normalization: http://stackoverflow.com/questions/16989598/bash-comparing-version-numbers
	function version { echo "$@" \| awk -F. '{ printf("%03d%03d%03d\n", $1,$2,$3); }'; }

	# If version mismatch, download and install required Maven
	if [ "$(version "$MVN_DETECTED_VERSION")" -ne "$(version "$MVN_REQUIRED_VERSION")" ]; then
	echo "[WARN] Maven version mismatch:" 1>&2
	echo " Detected: $MVN_DETECTED_VERSION" 1>&2
	echo " Required: $MVN_REQUIRED_VERSION" 1>&2
	echo "[INFO] You can:" 1>&2
	echo " 1. Set MVN_HOME to point to a correct Maven installation" 1>&2
	echo " 2. Let this script download the required version automatically" 1>&2
	echo "[INFO] Proceeding with Maven setup..." 1>&2

	local APACHE_MIRROR=${APACHE_MIRROR:-'https://www.apache.org/dyn/closer.lua'}
	local MIRROR_URL_QUERY="?action=download"
	local MVN_TARBALL="apache-maven-${MVN_REQUIRED_VERSION}-bin.tar.gz"
	local FILE_PATH="maven/maven-3/${MVN_REQUIRED_VERSION}/binaries"

	# Check if the tarball exists on mirror, fallback if necessary
	if command -v curl >/dev/null 2>&1; then
	if ! curl -L --output /dev/null --silent --head --fail "${APACHE_MIRROR}/${FILE_PATH}/${MVN_TARBALL}${MIRROR_URL_QUERY}" ; then
	APACHE_MIRROR="https://archive.apache.org/dist"
	MIRROR_URL_QUERY=""
	fi
	fi

	# Download and install Maven
	install_app \
	"${APACHE_MIRROR}/${FILE_PATH}" \
	"${MVN_TARBALL}" \
	"apache-maven-${MVN_REQUIRED_VERSION}/bin/mvn" \
	"${MIRROR_URL_QUERY}"

	MVN_BIN="${_DIR}/apache-maven-${MVN_REQUIRED_VERSION}/bin/mvn"
	fi
	}

	# Execute Maven installation check
	install_mvn

	cd "${_CALLING_DIR}"

	# Set any `mvn` options if not already present
	export MAVEN_OPTS=${MAVEN_OPTS:-"$_COMPILE_JVM_OPTS"}

	# Final validation and Maven execution
	if [ -n "$MVN_BIN" ] && [ -x "$MVN_BIN" ]; then
	echo "[INFO] Using Maven: $MVN_BIN" 1>&2
	"$MVN_BIN" -version 1>&2
	else
	echo "[ERROR] No valid Maven installation found or executable is broken. Please try again." 1>&2
	exit 1
	fi

	# Execute Maven with provided arguments
	${MVN_BIN} $MAVEN_CLI_OPTS "$@"