Perl 6 Install Script

install.sh

#!/usr/bin/env sh

set -e

INSTALL_DIR=$HOME/rakudo
LATEST_TAR="rakudo-star-latest.tar.gz"
URL="http://rakudo.org/downloads/star"

echo "\033[1;33m
This script will install Rakudo Star
A useful, usable Perl 6 production distribution

MINIMAL REQUIREMENTS FOR INSTALLATION
  * 2GB RAM or 1GB RAM + 1024MB swap
  * Build tools (ie. gcc, make) 
  * Perl v5.10.1 or greater
\033[0m"

Oops() {
    echo -n "\033[1;31mOOPS: \033[0m"
    echo >&2 $1
    exit 1;
}

Note() {
    echo "\033[0;33m"
    echo $1
    echo "\033[0m"
}

perl -e 'use v5.10.1' || {
    Oops "Please install perl v5.10.1 or greater and try again."
}

command -v make 2>&1 >/dev/null || {
    Oops "The 'make' command is required. Please install it and try again."
}

for BIN in 'curl' 'wget'; do
    echo -n "Checking for $BIN... "
    command -v $BIN 2>&1 >/dev/null && {
        echo "$BIN installed"
        DOWNLOAD_CMD=$BIN
        break
    }
    echo "$BIN not installed"
done

if [ "$DOWNLOAD_CMD" = "curl" ]; then
    DOWNLOAD_CMD="curl -L -O $URL/$LATEST_TAR -o $LATEST_TAR"
elif [ "$DOWNLOAD_CMD" = "wget" ]; then
    DOWNLOAD_CMD="wget $URL/$LATEST_TAR -O $LATEST_TAR"
else
    Oops "Either 'curl' or 'wget' is required. Please install one and try again."
fi

Note "# Downloading latest Rakudo release"

$DOWNLOAD_CMD || {
    Oops "Download failed. Please check your internet connection and try again."
}

tar -xzf $LATEST_TAR || {
    Oops "Could not extract achive. It may have been corrupted. Please try again."
}

test -d $INSTALL_DIR || mkdir $INSTALL_DIR

RELEASE=$(tar -tf $LATEST_TAR | head -n 1 | awk -F/ '{print $1}')

Note "# Installing release: $RELEASE"

cd $RELEASE
perl Configure.pl --gen-moar --backends=moar --prefix=$INSTALL_DIR
make
make install
cd ..

echo "export PATH=$INSTALL_DIR/bin:$INSTALL_DIR/share/perl6/site/bin:$PATH" > ~/rakudo/setpath.sh
grep -q rakudo/setpath.sh ~/.profile || echo ". ~/rakudo/setpath.sh" >> ~/.profile

Note "# Removing installation files"

test -d $RELEASE && rm -r $RELEASE
test -e $LATEST_TAR && rm $LATEST_TAR

echo "\033[1;33m
INSTALLATION COMPLETE!
\033[0m"

Shouldn't the perl -e 'use v5.10.1' line also have an '|| { Oops ... }'?

Hmm yeah... My logic was... set -e forces a shell script to exit if you don't handle exit codes. Hence, running this script on a system with perl v5.8.8 will exit the script with the last output being perl's error message Perl v5.10.1 required--this is only v5.8.8 but I'm assuming a linux world where almost everyone has perl. I forgot to account for users who might have no perl. I will amend.