#!/usr/bin/env bash

# This variant of the lein script is meant for downstream packagers.
# It has all the cross-platform stuff stripped out as well as the
# logic for running from a source checkout and self-install/upgrading.

export LEIN_VERSION="2.10.0"

if [[ "$CLASSPATH" != "" ]]; then
    cat <<-'EOS' 1>&2
	WARNING: You have $CLASSPATH set, probably by accident.
	It is strongly recommended to unset this before proceeding.
	EOS
fi

if [[ "$OSTYPE" == "cygwin" ]] || [[ "$OSTYPE" == "msys" ]]; then
    delimiter=";"
else
    delimiter=":"
fi

if [[ "$OSTYPE" == "cygwin" ]]; then
  cygwin=true
else
  cygwin=false
fi

function msg {
    echo "$@" 1>&2
}

function command_not_found {
    msg "Leiningen couldn't find $1 in your \$PATH ($PATH), which is required."
    exit 1
}

function make_native_path {
    # ensure we have native paths
    if $cygwin && [[ "$1"  == /* ]]; then
    echo -n "$(cygpath -wp "$1")"
    elif [[ "$OSTYPE" == "msys" && "$1"  == /?/* ]]; then
    echo -n "$(sh -c "(cd $1 2</dev/null && pwd -W) || echo $1 | sed 's/^\\/\([a-z]\)/\\1:/g'")"
    else
    echo -n "$1"
    fi
}

#  usage : add_path PATH_VAR [PATH]...
function add_path {
    local path_var="$1"
    shift
    while [ -n "$1" ];do
        # http://bashify.com/?Useful_Techniques:Indirect_Variables:Indirect_Assignment
        if [[ -z ${!path_var} ]]; then
          export ${path_var}="$(make_native_path "$1")"
        else
          export ${path_var}="${!path_var}${delimiter}$(make_native_path "$1")"
        fi
    shift
    done
}

function run_from_checkout() {
    add_path CLASSPATH "$LEIN_JAR"

    if [ "$LEIN_USE_BOOTCLASSPATH" != "no" ]; then
        LEIN_JVM_OPTS="-Xbootclasspath/a:$LEIN_JAR $LEIN_JVM_OPTS"
    fi
}

function cmd_run {
    if $cygwin; then
        # When running on Cygwin, use Windows-style paths for java
        ORIGINAL_PWD=$(cygpath -w "$ORIGINAL_PWD")
    fi

    # apply context specific CLASSPATH entries
    if [ -f .lein-classpath ]; then
        add_path CLASSPATH "$(cat .lein-classpath)"
    fi

    if [ -n "$DEBUG" ]; then
        msg "Leiningen's classpath: $CLASSPATH"
    fi

    if [ -r .lein-fast-trampoline ]; then
        export LEIN_FAST_TRAMPOLINE='y'
    fi

    if [ "$LEIN_FAST_TRAMPOLINE" != "" ] && [ -r project.clj ]; then
        INPUTS="$* $(cat project.clj) $LEIN_VERSION $(test -f "$LEIN_HOME/profiles.clj" && cat "$LEIN_HOME/profiles.clj") $(test -f profiles.clj && cat profiles.clj)"

        INPUT_CHECKSUM=$(echo "$INPUTS" | $SHASUM_CMD | cut -f 1 -d " ")
        # Just don't change :target-path in project.clj, mkay?
        TRAMPOLINE_FILE="target/trampolines/$INPUT_CHECKSUM"
    else
        if hash mktemp 2>/dev/null; then
            # Check if mktemp is available before using it
            TRAMPOLINE_FILE="$(mktemp -t lein-trampoline-XXXXXXXXXXXXX)"
        else
            TRAMPOLINE_FILE="/tmp/lein-trampoline-$$"
        fi
        trap 'rm -f $TRAMPOLINE_FILE' EXIT
    fi

    if $cygwin; then
        TRAMPOLINE_FILE=$(cygpath -w "$TRAMPOLINE_FILE")
    fi

    if [ "$INPUT_CHECKSUM" != "" ] && [ -r "$TRAMPOLINE_FILE" ]; then
        if [ -n "$DEBUG" ]; then
            msg "Fast trampoline with $TRAMPOLINE_FILE."
        fi
        exec sh -c "exec $(cat "$TRAMPOLINE_FILE")"
    else
        export TRAMPOLINE_FILE
        "$LEIN_JAVA_CMD" \
            -Dfile.encoding=UTF-8 \
            -Dmaven.wagon.http.ssl.easy=false \
            -Dmaven.wagon.rto=10000 \
            $LEIN_JVM_OPTS \
            -Dleiningen.input-checksum="$INPUT_CHECKSUM" \
            -Dleiningen.original.pwd="$ORIGINAL_PWD" \
            -Dleiningen.script="$SCRIPT" \
            -classpath "$CLASSPATH" \
            clojure.main -m leiningen.core.main "$@"

        EXIT_CODE=$?

        if $cygterm ; then
          stty icanon echo > /dev/null 2>&1
        fi

        if [ -r "$TRAMPOLINE_FILE" ] && [ "$LEIN_TRAMPOLINE_WARMUP" = "" ]; then
            TRAMPOLINE="$(cat "$TRAMPOLINE_FILE")"
            if [ "$INPUT_CHECKSUM" = "" ]; then # not using fast trampoline
                rm "$TRAMPOLINE_FILE"
            fi
            if [ "$TRAMPOLINE" = "" ]; then
                exit $EXIT_CODE
            else
                exec sh -c "exec $TRAMPOLINE"
            fi
        else
            exit $EXIT_CODE
        fi
    fi
}

# cd to the project root, if applicable
NOT_FOUND=1
ORIGINAL_PWD="$PWD"
while [ ! -r "$PWD/project.clj" ] && [ "$PWD" != "/" ] && [ $NOT_FOUND -ne 0 ]
do
    cd ..
    if [ "$(dirname "$PWD")" = "/" ]; then
        NOT_FOUND=0
        cd "$ORIGINAL_PWD"
    fi
done

# User init
export LEIN_HOME="${LEIN_HOME:-"$HOME/.lein"}"

for f in "/etc/leinrc" "$LEIN_HOME/leinrc" ".leinrc"; do
  if [ -e "$f" ]; then
    source "$f"
  fi
done

if $cygwin; then
    export LEIN_HOME=$(cygpath -w "$LEIN_HOME")
fi

# normalize $0 on certain BSDs
if [ "$(dirname "$0")" = "." ]; then
    SCRIPT="$(which "$(basename "$0")")"
    if [ -z "$SCRIPT" ]; then
        SCRIPT="$0"
    fi
else
    SCRIPT="$0"
fi

# resolve symlinks to the script itself portably
while [ -h "$SCRIPT" ] ; do
    ls=$(ls -ld "$SCRIPT")
    link=$(expr "$ls" : '.*-> \(.*\)$')
    if expr "$link" : '/.*' > /dev/null; then
        SCRIPT="$link"
    else
        SCRIPT="$(dirname "$SCRIPT"$)/$link"
    fi
done

BIN_DIR="$(dirname "$SCRIPT")"

# If you're not using an uberjar you'll need to list each dependency
# and add them individually to the classpath/bootclasspath as well.

LEIN_JAR=/usr/share/java/leiningen-$LEIN_VERSION-standalone.jar

export LEIN_JVM_OPTS="${LEIN_JVM_OPTS-"-XX:+TieredCompilation -XX:TieredStopAtLevel=1"}"

# This needs to be defined before we call SHASUM_CMD below
if [ "$SHASUM_CMD" = "" ]; then
    if type -p sha256sum >/dev/null 2>&1; then
        export SHASUM_CMD="sha256sum"
    elif type -p shasum >/dev/null 2>&1; then
        export SHASUM_CMD="shasum --algorithm 256"
    elif type -p sha256 >/dev/null 2>&1; then
        export SHASUM_CMD="sha256 -q"
    else
        command_not_found sha256sum
    fi
fi

# When :eval-in :classloader we need more memory
grep -E -q '^\s*:eval-in\s+:classloader\s*$' project.clj 2> /dev/null && \
    export LEIN_JVM_OPTS="$LEIN_JVM_OPTS -Xms64m -Xmx512m"

run_from_checkout "$1"

if [ ! -x "$JAVA_CMD" ] && ! type -f java >/dev/null
then
    msg "Leiningen couldn't find 'java' executable, which is required."
    msg "Please either set JAVA_CMD or put java (>=1.6) in your \$PATH ($PATH)."
    exit 1
fi

export LEIN_JAVA_CMD="${LEIN_JAVA_CMD:-${JAVA_CMD:-java}}"

if [[ -z "${DRIP_INIT+x}" && "$(basename "$LEIN_JAVA_CMD")" == *drip* ]]; then
    export DRIP_INIT="$(printf -- '-e\n(require (quote leiningen.repl))')"
    export DRIP_INIT_CLASS="clojure.main"
fi

# Support $JAVA_OPTS for backwards-compatibility.
export JVM_OPTS="${JVM_OPTS:-"$JAVA_OPTS"}"

# Handle jline issue with cygwin not propagating OSTYPE through java subprocesses: https://github.com/jline/jline2/issues/62
cygterm=false
if $cygwin; then
  case "$TERM" in
    rxvt* | xterm* | vt*) cygterm=true ;;
  esac
fi

if $cygterm; then
  LEIN_JVM_OPTS="$LEIN_JVM_OPTS -Djline.terminal=jline.UnixTerminal"
  stty -icanon min 1 -echo > /dev/null 2>&1
fi

if [ "$1" = "upgrade" ]; then
    echo "This version of Leiningen was installed with a package manager, but"
    echo "the upgrade task is intended for manual installs. Please use your"
    echo "package manager's built-in upgrade facilities instead."
    exit 1
fi

cmd_run "$@"