build/mvn

#!/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.

# This script downloads and installs Apache Maven if it's not already installed
# Usage: build/mvn <maven-args>
#

# Determine the current working directory
GLUTEN_HOME="$(cd "$(dirname "$0")"/.. && pwd)" || exit 1
DOWNLOAD_DIR="${GLUTEN_HOME}/build"
MVN_DOWNLOAD_DIR="${DOWNLOAD_DIR}/.mvn"

# Global variable for Maven binary path
MVN_BIN=""

# Read Maven version from pom.xml if not set
install_mvn() {
    # Check for system Maven first
    local SYSTEM_MVN
    SYSTEM_MVN="$(command -v mvn)"

    if [ -n "$SYSTEM_MVN" ]; then
        local MVN_DETECTED_VERSION
        MVN_DETECTED_VERSION="$(mvn --version 2>/dev/null | grep '^Apache Maven' | awk '{print $3}')"
        echo "Using system Maven: $SYSTEM_MVN (version $MVN_DETECTED_VERSION)" >&2
        MVN_BIN="$SYSTEM_MVN"
        return 0
    fi

    # Get Maven version from pom.xml using grep and sed
    local VERSION
    VERSION=$(grep "<maven.version>" "${GLUTEN_HOME}/pom.xml" | head -n1 | \
              awk -F '[<>]' '{print $3}')

    if [ -z "$VERSION" ]; then
        echo "ERROR: Could not read maven.version from pom.xml. Please define <maven.version> in ${GLUTEN_HOME}/pom.xml" >&2
        exit 1
    fi

    local MVN_LOCAL_BIN="${MVN_DOWNLOAD_DIR}/apache-maven-${VERSION}/bin/mvn"

    if [ ! -f "${MVN_LOCAL_BIN}" ]; then
        echo "Maven ${VERSION} not found locally. Downloading..." >&2

        # Create download directory
        mkdir -p "${MVN_DOWNLOAD_DIR}"

        local MVN_TAR="${MVN_DOWNLOAD_DIR}/apache-maven-${VERSION}-bin.tar.gz"

        if [ ! -f "${MVN_TAR}" ]; then
            # Use Maven Central repository for download
            local DOWNLOAD_URL="https://repo1.maven.org/maven2/org/apache/maven/apache-maven/${VERSION}/apache-maven-${VERSION}-bin.tar.gz"

            echo "Downloading Maven ${VERSION} from Maven Central..." >&2
            echo "URL: ${DOWNLOAD_URL}" >&2

            if command -v curl > /dev/null 2>&1; then
                curl -f -L --retry 3 --retry-delay 3 \
                     --connect-timeout 30 --max-time 600 \
                     -o "${MVN_TAR}" "${DOWNLOAD_URL}" || {
                    echo "ERROR: Failed to download Maven from ${DOWNLOAD_URL}" >&2
                    rm -f "${MVN_TAR}"
                    exit 1
                }
            elif command -v wget > /dev/null 2>&1; then
                wget --tries=3 --waitretry=3 \
                     --connect-timeout=30 --read-timeout=600 \
                     -O "${MVN_TAR}" "${DOWNLOAD_URL}" || {
                    echo "ERROR: Failed to download Maven from ${DOWNLOAD_URL}" >&2
                    rm -f "${MVN_TAR}"
                    exit 1
                }
            else
                echo "ERROR: Neither curl nor wget found. Please install one of them or install Maven manually." >&2
                exit 1
            fi

            echo "Download completed successfully" >&2
        fi

        # Extract Maven
        echo "Extracting Maven to ${MVN_DOWNLOAD_DIR}..." >&2
        if ! tar -xzf "${MVN_TAR}" -C "${MVN_DOWNLOAD_DIR}"; then
            echo "ERROR: Failed to extract Maven" >&2
            rm -f "${MVN_TAR}"
            exit 1
        fi

        # Clean up tar file
        rm -f "${MVN_TAR}"

        echo "Maven ${VERSION} installed successfully to ${MVN_DOWNLOAD_DIR}/apache-maven-${VERSION}" >&2
    else
        echo "Using downloaded Maven: ${MVN_LOCAL_BIN} (version ${VERSION})" >&2
    fi

    # Set global variable
    MVN_BIN="${MVN_LOCAL_BIN}"
}

# Install Maven if needed
install_mvn

# Verify Maven binary is set
if [ -z "${MVN_BIN}" ]; then
    echo "ERROR: Maven binary not found. Please install Maven or check your installation." >&2
    exit 1
fi

# Verify Maven binary exists
if [ ! -f "${MVN_BIN}" ]; then
    echo "ERROR: Maven binary does not exist: ${MVN_BIN}" >&2
    exit 1
fi

_COMPILE_JVM_OPTS="-Xss128m -Xmx4g -XX:ReservedCodeCacheSize=2g"
# Set any `mvn` options if not already present
export MAVEN_OPTS=${MAVEN_OPTS:-"$_COMPILE_JVM_OPTS"}

echo "MAVEN_OPTS: ${MAVEN_OPTS}" >&2

"${MVN_BIN}" "$@"

MVN_RETCODE=$?

exit $MVN_RETCODE