install.sh
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Created: Sun, Dec 29, 14:55

install.sh
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	#!/bin/sh

	# A word about this shell script:
	#
	# It must work everywhere, including on systems that lack
	# a /bin/bash, map 'sh' to ksh, ksh97, bash, ash, or zsh,
	# and potentially have either a posix shell or bourne
	# shell living at /bin/sh.
	#
	# See this helpful document on writing portable shell scripts:
	# http://www.gnu.org/s/hello/manual/autoconf/Portable-Shell.html
	#
	# The only shell it won't ever work on is cmd.exe.

	if [ "x$0" = "xsh" ]; then
	# run as curl \| sh
	# on some systems, you can just do cat>npm-install.sh
	# which is a bit cuter. But on others, &1 is already closed,
	# so catting to another script file won't do anything.
	# Follow Location: headers, and fail on errors
	curl -f -L -s https://www.npmjs.org/install.sh > npm-install-$$.sh
	ret=$?
	if [ $ret -eq 0 ]; then
	(exit 0)
	else
	rm npm-install-$$.sh
	echo "Failed to download script" >&2
	exit $ret
	fi
	sh npm-install-$$.sh
	ret=$?
	rm npm-install-$$.sh
	exit $ret
	fi

	# See what "npm_config_*" things there are in the env,
	# and make them permanent.
	# If this fails, it's not such a big deal.
	configures="`env \| grep 'npm_config_' \| sed -e 's\|^npm_config_\|\|g'`"

	npm_config_loglevel="error"
	if [ "x$npm_debug" = "x" ]; then
	(exit 0)
	else
	echo "Running in debug mode."
	echo "Note that this requires bash or zsh."
	set -o xtrace
	set -o pipefail
	npm_config_loglevel="verbose"
	fi
	export npm_config_loglevel

	# make sure that node exists
	node=`which node 2>&1`
	ret=$?
	if [ $ret -eq 0 ] && [ -x "$node" ]; then
	(exit 0)
	else
	echo "npm cannot be installed without node.js." >&2
	echo "Install node first, and then try again." >&2
	echo "" >&2
	echo "Maybe node is installed, but not in the PATH?" >&2
	echo "Note that running as sudo can change envs." >&2
	echo ""
	echo "PATH=$PATH" >&2
	exit $ret
	fi

	# set the temp dir
	TMP="${TMPDIR}"
	if [ "x$TMP" = "x" ]; then
	TMP="/tmp"
	fi
	TMP="${TMP}/npm.$$"
	rm -rf "$TMP" \|\| true
	mkdir "$TMP"
	if [ $? -ne 0 ]; then
	echo "failed to mkdir $TMP" >&2
	exit 1
	fi

	BACK="$PWD"

	ret=0
	tar="${TAR}"
	if [ -z "$tar" ]; then
	tar="${npm_config_tar}"
	fi
	if [ -z "$tar" ]; then
	tar=`which tar 2>&1`
	ret=$?
	fi

	if [ $ret -eq 0 ] && [ -x "$tar" ]; then
	echo "tar=$tar"
	echo "version:"
	$tar --version
	ret=$?
	fi

	if [ $ret -eq 0 ]; then
	(exit 0)
	else
	echo "No suitable tar program found."
	exit 1
	fi



	# Try to find a suitable make
	# If the MAKE environment var is set, use that.
	# otherwise, try to find gmake, and then make.
	# If no make is found, then just execute the necessary commands.

	# XXX For some reason, make is building all the docs every time. This
	# is an annoying source of bugs. Figure out why this happens.
	MAKE=NOMAKE

	if [ "x$MAKE" = "x" ]; then
	make=`which gmake 2>&1`
	if [ $? -eq 0 ] && [ -x "$make" ]; then
	(exit 0)
	else
	make=`which make 2>&1`
	if [ $? -eq 0 ] && [ -x "$make" ]; then
	(exit 0)
	else
	make=NOMAKE
	fi
	fi
	else
	make="$MAKE"
	fi

	if [ -x "$make" ]; then
	(exit 0)
	else
	# echo "Installing without make. This may fail." >&2
	make=NOMAKE
	fi

	# If there's no bash, then don't even try to clean
	if [ -x "/bin/bash" ]; then
	(exit 0)
	else
	clean="no"
	fi

	node_version=`"$node" --version 2>&1`
	ret=$?
	if [ $ret -ne 0 ]; then
	echo "You need node to run this program." >&2
	echo "node --version reports: $node_version" >&2
	echo "with exit code = $ret" >&2
	echo "Please install node before continuing." >&2
	exit $ret
	fi

	t="${npm_install}"
	if [ -z "$t" ]; then
	# switch based on node version.
	# note that we can only use strict sh-compatible patterns here.
	case $node_version in
	0.[01234567].* \| v0.[01234567].*)
	echo "You are using an outdated and unsupported version of" >&2
	echo "node ($node_version). Please update node and try again." >&2
	exit 99
	;;
	*)
	echo "install npm@latest"
	t="latest"
	;;
	esac
	fi

	# need to echo "" after, because Posix sed doesn't treat EOF
	# as an implied end of line.
	url=`(curl -SsL https://registry.npmjs.org/npm/$t; echo "") \
	\| sed -e 's/^.*tarball":"//' \
	\| sed -e 's/".*$//'`

	ret=$?
	if [ "x$url" = "x" ]; then
	ret=125
	# try without the -e arg to sed.
	url=`(curl -SsL https://registry.npmjs.org/npm/$t; echo "") \
	\| sed 's/^.*tarball":"//' \
	\| sed 's/".*$//'`
	ret=$?
	if [ "x$url" = "x" ]; then
	ret=125
	fi
	fi
	if [ $ret -ne 0 ]; then
	echo "Failed to get tarball url for npm/$t" >&2
	exit $ret
	fi


	echo "fetching: $url" >&2

	cd "$TMP" \
	&& curl -SsL "$url" \
	\| $tar -xzf - \
	&& cd "$TMP"/* \
	&& (ver=`"$node" bin/read-package-json.js package.json version`
	isnpm10=0
	if [ $ret -eq 0 ]; then
	if [ -d node_modules ]; then
	if "$node" node_modules/semver/bin/semver -v "$ver" -r "1"
	then
	isnpm10=1
	fi
	else
	if "$node" bin/semver -v "$ver" -r ">=1.0"; then
	isnpm10=1
	fi
	fi
	fi

	ret=0
	if [ $isnpm10 -eq 1 ] && [ -f "scripts/clean-old.sh" ]; then
	if [ "x$skipclean" = "x" ]; then
	(exit 0)
	else
	clean=no
	fi
	if [ "x$clean" = "xno" ] \
	\|\| [ "x$clean" = "xn" ]; then
	echo "Skipping 0.x cruft clean" >&2
	ret=0
	elif [ "x$clean" = "xy" ] \|\| [ "x$clean" = "xyes" ]; then
	NODE="$node" /bin/bash "scripts/clean-old.sh" "-y"
	ret=$?
	else
	NODE="$node" /bin/bash "scripts/clean-old.sh" </dev/tty
	ret=$?
	fi
	fi

	if [ $ret -ne 0 ]; then
	echo "Aborted 0.x cleanup. Exiting." >&2
	exit $ret
	fi) \
	&& (if [ "x$configures" = "x" ]; then
	(exit 0)
	else
	echo "./configure $configures"
	echo "$configures" > npmrc
	fi) \
	&& (if [ "$make" = "NOMAKE" ]; then
	(exit 0)
	elif "$make" uninstall install; then
	(exit 0)
	else
	make="NOMAKE"
	fi
	if [ "$make" = "NOMAKE" ]; then
	"$node" cli.js rm npm -gf
	"$node" cli.js install -gf
	fi) \
	&& cd "$BACK" \
	&& rm -rf "$TMP" \
	&& echo "It worked"

	ret=$?
	if [ $ret -ne 0 ]; then
	echo "It failed" >&2
	fi
	exit $ret

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