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#!/bin/bash
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# Copyright (C) 2013 Ole Tange and Free Software Foundation, Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This script downloads the latest version of GNU Parallel, checks
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# the signature and installs it.
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#
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# It first tries to install it globally.
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# If that fails, it does a personal installation.
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# If that fails, it copies to $HOME/bin
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# Download and run the script directly by:
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# (wget -O - pi.dk/3 || curl pi.dk/3/ || fetch -o - http://pi.dk/3) | bash
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# tail on openindiana must be /usr/xpg4/bin/tail
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TAIL=$(echo | tail -n 1 2>/dev/null && echo tail || (echo | /usr/xpg4/bin/tail -n 1 && echo /usr/xpg4/bin/tail))
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# grep on openindiana must be /usr/xpg4/bin/grep
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GREP=$(echo | grep -vE . 2>/dev/null && echo grep || (echo | /usr/xpg4/bin/grep -vE . && echo /usr/xpg4/bin/grep))
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# FreeBSD prefers 'fetch', MacOS prefers 'curl', Linux prefers 'wget'
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GET=$(
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(fetch -o /dev/null file:///bin/sh && echo fetch -o -) ||
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(curl -h >/dev/null && echo curl -L) ||
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(wget -h >/dev/null && echo wget -qO -) ||
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echo 'No wget, curl, fetch: Please inform parallel@gnu.org what you use for downloading URLs' >&2
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)
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if test "$GET" = ""; then
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exit 1
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fi
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if ! perl -e 1; then
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echo No perl installed. GNU Parallel depends on perl. Install perl and retry
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exit 1
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fi
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LANG=C
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LATEST=$($GET http://ftpmirror.gnu.org/parallel | perl -ne '/.*(parallel-\d{8})/ and print $1."\n"' | sort | $TAIL -n1)
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if test \! -e $LATEST.tar.bz2; then
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# Source tar does not exist
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rm -f $LATEST.tar.bz2 $LATEST.tar.bz2.sig
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$GET http://ftpmirror.gnu.org/parallel/$LATEST.tar.bz2 > $LATEST.tar.bz2
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$GET http://ftpmirror.gnu.org/parallel/$LATEST.tar.bz2.sig > $LATEST.tar.bz2.sig
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fi
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# Check signature - in case ftpmirror.gnu.org is compromised
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if gpg -h 2>/dev/null >/dev/null; then
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# GnuPG installed
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# Setup .gnupg/gpg.conf if not already done
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echo | gpg 2>/dev/null >/dev/null
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gpg --keyserver keys.gnupg.net --recv-key FFFFFFF1
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gpg --keyserver keys.gnupg.net --recv-key 88888888
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if gpg --with-fingerprint $LATEST.tar.bz2.sig 2>&1 | $GREP -E '^Primary key fingerprint: BE9C B493 81DE 3166 A3BC 66C1 2C62 29E2 FFFF FFF1|^Primary key fingerprint: CDA0 1A42 08C4 F745 0610 7E7B D1AB 4516 8888 8888' ; then
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# Source code signed by Ole Tange <ole@tange.dk> KeyID FFFFFFF1/88888888
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true
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else
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# GnuPG signature failed
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echo
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echo "The signature on $LATEST.tar.bz2 is wrong. This may indicate that a criminal has changed the code."
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echo "THIS IS BAD AND THE CODE WILL NOT BE INSTALLED."
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echo
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echo "See http://git.savannah.gnu.org/cgit/parallel.git/tree/README for other installation methods."
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exit 1
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fi
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else
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# GnuPG not installed
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echo "GnuPG (gpg) is not installed so the signature cannot be checked."
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echo "This means that if the code has been changed by criminals, you will not discover that!"
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echo
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echo "Continue anyway? (y/n)"
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read YN </dev/tty
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if test "$YN" = "n"; then
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# Stop
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exit 2
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else
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# Continue
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true
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fi
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fi
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bzip2 -dc $LATEST.tar.bz2 | tar xf -
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cd $LATEST || exit 2
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if ./configure && make && make install; then
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echo
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echo GNU $LATEST installed globally
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else
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if ./configure --prefix=$HOME && make && make install; then
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echo
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echo GNU $LATEST installed in $HOME/bin
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else
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mkdir -p $HOME/bin/;
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chmod 755 src/*;
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cp src/parallel src/sem src/sql src/niceload $HOME/bin;
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echo
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echo GNU $LATEST copied to $HOME/bin
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fi
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# Is $HOME/bin already in $PATH?
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if echo $PATH | grep $HOME/bin >/dev/null; then
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# $HOME/bin is already in $PATH
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true
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else
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# Add $HOME/bin to $PATH for both bash and csh
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echo 'PATH=$PATH:$HOME/bin' >> $HOME/.bashrc
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echo 'setenv PATH ${PATH}:${HOME}/bin' >> $HOME/.cshrc
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fi
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# Is $HOME/share/man already in $MANPATH?
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if echo $MANPATH | grep $HOME/share/man >/dev/null; then
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# $HOME/share/man is already in $MANPATH
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true
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else
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# Add $HOME/share/man to $MANPATH for both bash and csh
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echo 'MANPATH=$MANPATH:$HOME/share/man' >> $HOME/.bashrc
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echo 'setenv MANPATH ${MANPATH}:${HOME}/share/man' >> $HOME/.cshrc
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fi
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fi
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