initializr/mvnw

#!/bin/sh
# ----------------------------------------------------------------------------
# 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
#
#    https://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.
# ----------------------------------------------------------------------------

# ----------------------------------------------------------------------------
# Apache Maven Wrapper startup batch script, version 3.2.0
#
# Required ENV vars:
# ------------------
#   JAVA_HOME - location of a JDK home dir
#
# Optional ENV vars
# -----------------
#   MAVEN_OPTS - parameters passed to the Java VM when running Maven
#     e.g. to debug Maven itself, use
#       set MAVEN_OPTS=-Xdebug -Xrunjdwp:transport=dt_socket,server=y,suspend=y,address=8000
#   MAVEN_SKIP_RC - flag to disable loading of mavenrc files
# ----------------------------------------------------------------------------

if [ -z "$MAVEN_SKIP_RC" ] ; then

  if [ -f /usr/local/etc/mavenrc ] ; then
    . /usr/local/etc/mavenrc
  fi

  if [ -f /etc/mavenrc ] ; then
    . /etc/mavenrc
  fi

  if [ -f "$HOME/.mavenrc" ] ; then
    . "$HOME/.mavenrc"
  fi

fi

# OS specific support.  $var _must_ be set to either true or false.
cygwin=false;
darwin=false;
mingw=false
case "$(uname)" in
  CYGWIN*) cygwin=true ;;
  MINGW*) mingw=true;;
  Darwin*) darwin=true
    # Use /usr/libexec/java_home if available, otherwise fall back to /Library/Java/Home
    # See https://developer.apple.com/library/mac/qa/qa1170/_index.html
    if [ -z "$JAVA_HOME" ]; then
      if [ -x "/usr/libexec/java_home" ]; then
        JAVA_HOME="$(/usr/libexec/java_home)"; export JAVA_HOME
      else
        JAVA_HOME="/Library/Java/Home"; export JAVA_HOME
      fi
    fi
    ;;
esac

if [ -z "$JAVA_HOME" ] ; then
  if [ -r /etc/gentoo-release ] ; then
    JAVA_HOME=$(java-config --jre-home)
  fi
fi

# For Cygwin, ensure paths are in UNIX format before anything is touched
if $cygwin ; then
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME=$(cygpath --unix "$JAVA_HOME")
  [ -n "$CLASSPATH" ] &&
    CLASSPATH=$(cygpath --path --unix "$CLASSPATH")
fi

# For Mingw, ensure paths are in UNIX format before anything is touched
if $mingw ; then
  [ -n "$JAVA_HOME" ] && [ -d "$JAVA_HOME" ] &&
    JAVA_HOME="$(cd "$JAVA_HOME" || (echo "cannot cd into $JAVA_HOME."; exit 1); pwd)"
fi

if [ -z "$JAVA_HOME" ]; then
  javaExecutable="$(which javac)"
  if [ -n "$javaExecutable" ] && ! [ "$(expr "\"$javaExecutable\"" : '\([^ ]*\)')" = "no" ]; then
    # readlink(1) is not available as standard on Solaris 10.
    readLink=$(which readlink)
    if [ ! "$(expr "$readLink" : '\([^ ]*\)')" = "no" ]; then
      if $darwin ; then
        javaHome="$(dirname "\"$javaExecutable\"")"
        javaExecutable="$(cd "\"$javaHome\"" && pwd -P)/javac"
      else
        javaExecutable="$(readlink -f "\"$javaExecutable\"")"
      fi
      javaHome="$(dirname "\"$javaExecutable\"")"
      javaHome=$(expr "$javaHome" : '\(.*\)/bin')
      JAVA_HOME="$javaHome"
      export JAVA_HOME
    fi
  fi
fi

if [ -z "$JAVACMD" ] ; then
  if [ -n "$JAVA_HOME"  ] ; then
    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
      # IBM's JDK on AIX uses strange locations for the executables
      JAVACMD="$JAVA_HOME/jre/sh/java"
    else
      JAVACMD="$JAVA_HOME/bin/java"
    fi
  else
    JAVACMD="$(\unset -f command 2>/dev/null; \command -v java)"
  fi
fi

if [ ! -x "$JAVACMD" ] ; then
  echo "Error: JAVA_HOME is not defined correctly." >&2
  echo "  We cannot execute $JAVACMD" >&2
  exit 1
fi

if [ -z "$JAVA_HOME" ] ; then
  echo "Warning: JAVA_HOME environment variable is not set."
fi

# traverses directory structure from process work directory to filesystem root
# first directory with .mvn subdirectory is considered project base directory
find_maven_basedir() {
  if [ -z "$1" ]
  then
    echo "Path not specified to find_maven_basedir"
    return 1
  fi

  basedir="$1"
  wdir="$1"
  while [ "$wdir" != '/' ] ; do
    if [ -d "$wdir"/.mvn ] ; then
      basedir=$wdir
      break
    fi
    # workaround for JBEAP-8937 (on Solaris 10/Sparc)
    if [ -d "${wdir}" ]; then
      wdir=$(cd "$wdir/.." || exit 1; pwd)
    fi
    # end of workaround
  done
  printf '%s' "$(cd "$basedir" || exit 1; pwd)"
}

# concatenates all lines of a file
concat_lines() {
  if [ -f "$1" ]; then
    # Remove \r in case we run on Windows within Git Bash
    # and check out the repository with auto CRLF management
    # enabled. Otherwise, we may read lines that are delimited with
    # \r\n and produce $'-Xarg\r' rather than -Xarg due to word
    # splitting rules.
    tr -s '\r\n' ' ' < "$1"
  fi
}

log() {
  if [ "$MVNW_VERBOSE" = true ]; then
    printf '%s\n' "$1"
  fi
}

BASE_DIR=$(find_maven_basedir "$(dirname "$0")")
if [ -z "$BASE_DIR" ]; then
  exit 1;
fi

MAVEN_PROJECTBASEDIR=${MAVEN_BASEDIR:-"$BASE_DIR"}; export MAVEN_PROJECTBASEDIR
log "$MAVEN_PROJECTBASEDIR"

##########################################################################################
# Extension to allow automatically downloading the maven-wrapper.jar from Maven-central
# This allows using the maven wrapper in projects that prohibit checking in binary data.
##########################################################################################
wrapperJarPath="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar"
if [ -r "$wrapperJarPath" ]; then
    log "Found $wrapperJarPath"
else
    log "Couldn't find $wrapperJarPath, downloading it ..."

    if [ -n "$MVNW_REPOURL" ]; then
      wrapperUrl="$MVNW_REPOURL/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
    else
      wrapperUrl="https://repo.maven.apache.org/maven2/org/apache/maven/wrapper/maven-wrapper/3.2.0/maven-wrapper-3.2.0.jar"
    fi
    while IFS="=" read -r key value; do
      # Remove '\r' from value to allow usage on windows as IFS does not consider '\r' as a separator ( considers space, tab, new line ('\n'), and custom '=' )
      safeValue=$(echo "$value" | tr -d '\r')
      case "$key" in (wrapperUrl) wrapperUrl="$safeValue"; break ;;
      esac
    done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
    log "Downloading from: $wrapperUrl"

    if $cygwin; then
      wrapperJarPath=$(cygpath --path --windows "$wrapperJarPath")
    fi

    if command -v wget > /dev/null; then
        log "Found wget ... using wget"
        [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--quiet"
        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
            wget $QUIET "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
        else
            wget $QUIET --http-user="$MVNW_USERNAME" --http-password="$MVNW_PASSWORD" "$wrapperUrl" -O "$wrapperJarPath" || rm -f "$wrapperJarPath"
        fi
    elif command -v curl > /dev/null; then
        log "Found curl ... using curl"
        [ "$MVNW_VERBOSE" = true ] && QUIET="" || QUIET="--silent"
        if [ -z "$MVNW_USERNAME" ] || [ -z "$MVNW_PASSWORD" ]; then
            curl $QUIET -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
        else
            curl $QUIET --user "$MVNW_USERNAME:$MVNW_PASSWORD" -o "$wrapperJarPath" "$wrapperUrl" -f -L || rm -f "$wrapperJarPath"
        fi
    else
        log "Falling back to using Java to download"
        javaSource="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.java"
        javaClass="$MAVEN_PROJECTBASEDIR/.mvn/wrapper/MavenWrapperDownloader.class"
        # For Cygwin, switch paths to Windows format before running javac
        if $cygwin; then
          javaSource=$(cygpath --path --windows "$javaSource")
          javaClass=$(cygpath --path --windows "$javaClass")
        fi
        if [ -e "$javaSource" ]; then
            if [ ! -e "$javaClass" ]; then
                log " - Compiling MavenWrapperDownloader.java ..."
                ("$JAVA_HOME/bin/javac" "$javaSource")
            fi
            if [ -e "$javaClass" ]; then
                log " - Running MavenWrapperDownloader.java ..."
                ("$JAVA_HOME/bin/java" -cp .mvn/wrapper MavenWrapperDownloader "$wrapperUrl" "$wrapperJarPath") || rm -f "$wrapperJarPath"
            fi
        fi
    fi
fi
##########################################################################################
# End of extension
##########################################################################################

# If specified, validate the SHA-256 sum of the Maven wrapper jar file
wrapperSha256Sum=""
while IFS="=" read -r key value; do
  case "$key" in (wrapperSha256Sum) wrapperSha256Sum=$value; break ;;
  esac
done < "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.properties"
if [ -n "$wrapperSha256Sum" ]; then
  wrapperSha256Result=false
  if command -v sha256sum > /dev/null; then
    if echo "$wrapperSha256Sum  $wrapperJarPath" | sha256sum -c > /dev/null 2>&1; then
      wrapperSha256Result=true
    fi
  elif command -v shasum > /dev/null; then
    if echo "$wrapperSha256Sum  $wrapperJarPath" | shasum -a 256 -c > /dev/null 2>&1; then
      wrapperSha256Result=true
    fi
  else
    echo "Checksum validation was requested but neither 'sha256sum' or 'shasum' are available."
    echo "Please install either command, or disable validation by removing 'wrapperSha256Sum' from your maven-wrapper.properties."
    exit 1
  fi
  if [ $wrapperSha256Result = false ]; then
    echo "Error: Failed to validate Maven wrapper SHA-256, your Maven wrapper might be compromised." >&2
    echo "Investigate or delete $wrapperJarPath to attempt a clean download." >&2
    echo "If you updated your Maven version, you need to update the specified wrapperSha256Sum property." >&2
    exit 1
  fi
fi

MAVEN_OPTS="$(concat_lines "$MAVEN_PROJECTBASEDIR/.mvn/jvm.config") $MAVEN_OPTS"

# For Cygwin, switch paths to Windows format before running java
if $cygwin; then
  [ -n "$JAVA_HOME" ] &&
    JAVA_HOME=$(cygpath --path --windows "$JAVA_HOME")
  [ -n "$CLASSPATH" ] &&
    CLASSPATH=$(cygpath --path --windows "$CLASSPATH")
  [ -n "$MAVEN_PROJECTBASEDIR" ] &&
    MAVEN_PROJECTBASEDIR=$(cygpath --path --windows "$MAVEN_PROJECTBASEDIR")
fi

# Provide a "standardized" way to retrieve the CLI args that will
# work with both Windows and non-Windows executions.
MAVEN_CMD_LINE_ARGS="$MAVEN_CONFIG $*"
export MAVEN_CMD_LINE_ARGS

WRAPPER_LAUNCHER=org.apache.maven.wrapper.MavenWrapperMain

# shellcheck disable=SC2086 # safe args
exec "$JAVACMD" \
  $MAVEN_OPTS \
  $MAVEN_DEBUG_OPTS \
  -classpath "$MAVEN_PROJECTBASEDIR/.mvn/wrapper/maven-wrapper.jar" \
  "-Dmaven.multiModuleProjectDirectory=${MAVEN_PROJECTBASEDIR}" \
  ${WRAPPER_LAUNCHER} $MAVEN_CONFIG "$@"