Refactor .ssh/ssh into shared libs

test "${SOURCED_CONSTANTS-}" && return

SOURCED_CONSTANTS=yes

KERNEL=`uname -s`

case $KERNEL in

	Linux*) KERNEL=linux ;;

	Darwin*) KERNEL=xnu PLATFORM=darwin ;;

	NT*) KERNEL=nt ;;

esac

PLATFORM=`uname -o 2>/dev/null || uname`

case $PLATFORM in

	GNU*) PLATFORM=gnu ;;

	CYGWIN*) PLATFORM=gnu ;;

	MING*) PLATFORM=windows ;;

	Darwin*) PLATFORM=xnu ;;

esac

export SOURCED_CONSTANTS KERNEL PLATFORM

SCRIPT_NAME=`basename $0`

BOLD=`tput bold`

UNBOLD=`tput sgr0`

if [ -n "${ZSH_NAME:-}" ]; then

	CURRENT_SHELL=zsh

elif [ -n "${BASH:-}" ]; then

	CURRENT_SHELL=bash

else

	CURRENT_SHELL=sh

fi

die() {

	[ ${CODE:=$?} -gt 1 ] || CODE=2

	echo >&2 "${BOLD}${SCRIPT_NAME}:${UNBOLD} $*"

	exit $CODE

}

. ~/.shell/lib/constants.sh

. ~/.shell/lib/shared.sh

: ${SSH_BIN:=`which ssh`}; export SSH_BIN

if [ $PLATFORM = windows ]; then

	if ! has sed; then

		die "This script requires 'sed'"

	fi

	# Hope it's GNU sed?

	PLATFORM=gnu

fi

ssh_version() {

	eval `${SSH_BIN} -V 2>&1 | sed -n \

		's/OpenSSH_\([0-9]\{1,\}\)\.\([0-9]\{1,\}\).*/SSH_MAJOR="\1" SSH_MINOR="\2"/p'`

}

config_sed() {

	case $PLATFORM in

		darwin|bsd) SED_WORD_START='[[:<:]]' SED_WORD_END='[[:>:]]' ;;

		gnu) case "$CURRENT_SHELL" in

			bash) SED_WORD_START='\b' SED_WORD_END='\b' ;;

			zsh|sh) SED_WORD_START='\\b' SED_WORD_END='\\b' ;;

		esac ;;

	esac

}

runtime() {

	if [ -n "${XDG_RUNTIME_DIR:-}" ] && [ -d "$XDG_RUNTIME_DIR" ]; then

		RUNTIME="$XDG_RUNTIME_DIR/ssh"

	elif [ -d /tmp ]; then

		RUNTIME=/tmp/user/`id -u`/ssh

	else

		RUNTIME=$HOME/.ssh/.runtime

	fi

	if ! [ -d "$RUNTIME" ]; then

		mkdir -p "$RUNTIME"

		chmod 0750 `dirname $RUNTIME`

	fi >&2

}

make_config() {

	[ -z "${SSH_CONFIG-}" ] || return 0

	ssh_version && runtime && config_sed

	PLATFORM_UNIQ="$PLATFORM:$KERNEL:`hostname -f 2>/dev/null || hostname`:$SSH_MAJOR.$SSH_MINOR"

	PLATFORM_ID=`echo "$PLATFORM_UNIQ" | md5sum | cut -f1 -d' '`

	SSH_CONFIG="$RUNTIME/config-$PLATFORM_ID"

	if [ -f "$SSH_CONFIG" ] &&

		[ "$SSH_CONFIG" -nt ~/.ssh/config ] &&

		[ "$SSH_CONFIG" -nt $0 ] &&

		(! [ -r ~/.ssh/config.local ] || [ "$SSH_CONFIG" -nt ~/.ssh/config.local ])

	then

		return

	fi

	cat ~/.ssh/config ~/.ssh/config.local 2>/dev/null |

		sed >"$SSH_CONFIG" "

			`rule_unix_sockets`

			`rule_canonisation`

			`rule_runtime`

		"

}

# Filter rules

rule_unix_sockets() {

	# Windows has no unix sockets so disable shared connections

	# (Control* settings)

	if [ $KERNEL = nt ]; then

		echo '/^\s*Control.*/d;'

	fi

}

rule_canonisation() {

	# OpenSSH < 6.6 does not have name canonisation

	# (Canonical* settings)

	if [ $SSH_MAJOR -gt 6 ]; then return; fi

	if [ $SSH_MAJOR -lt 6 ] || [ $SSH_MINOR -lt 6 ]; then

		echo '/Canonical/d;'

	fi

}

rule_runtime() {

	# Replace RUNTIME with the value of the RUNTIME variable

	[ -n "$RUNTIME" ] || die "RUNTIME not set"

	echo "s!${SED_WORD_START}RUNTIME${SED_WORD_END}!${RUNTIME-.}!g;"

}

#!/bin/sh

set -eu

: ${SSH_BIN:=`which ssh`}; export SSH_BIN

. ~/.shell/lib/ssh.sh

. ~/.shell/funcs

die() {

	[ ${CODE:=$?} -gt 1 ] || CODE=2

	echo >&2 "$*"

	exit $CODE

}

ssh_version() {

	eval `${SSH_BIN} -V 2>&1 | sed -n \

		's/OpenSSH_\([0-9]\{1,\}\)\.\([0-9]\{1,\}\).*/SSH_MAJOR="\1" SSH_MINOR="\2"/p'`

}

platform() {

	case `uname` in

		Linux*) PLATFORM=linux ;;

		CYGWIN*) PLATFORM=windows ;;

		MING*) PLATFORM=windows ;;

		Darwin*) PLATFORM=darwin ;;

		*) echo >&2 "Unrecognised platform: `uname`"; exit 2 ;;

	esac

	if [ -n "${ZSH_NAME:-}" ]; then

		SHELL=zsh

	elif [ -n "${BASH:-}" ]; then

		SHELL=bash

	else

		SHELL=sh

	fi

}

config_sed() {

	case $PLATFORM in

		darwin|bsd) SED_WORD_START='[[:<:]]' SED_WORD_END='[[:>:]]'; return ;;

	esac

	case "$SHELL" in

		bash) SED_WORD_START='\b' SED_WORD_END='\b' ;;

		zsh|sh) SED_WORD_START='\\b' SED_WORD_END='\\b' ;;

	esac

}

runtime() {

	if [ -n "${XDG_RUNTIME_DIR:-}" ] && [ -d "$XDG_RUNTIME_DIR" ]; then

		RUNTIME="$XDG_RUNTIME_DIR/ssh"

	elif [ -d /tmp ]; then

		RUNTIME=/tmp/user/`id -u`/ssh

	else

		RUNTIME=$HOME/.ssh/.runtime

	fi

	if ! [ -d "$RUNTIME" ]; then

		mkdir -p "$RUNTIME"

		chmod 0750 `dirname $RUNTIME`

	fi >&2

}

rule_unix_sockets() {

	# Windows has no unix sockets so disable shared connections

	# (Control* settings)

	if [ $PLATFORM = windows ]; then

		echo '/^\s*Control.*/d;'

	fi

}

rule_canonisation() {

	# OpenSSH < 6.6 does not have name canonisation

	# (Canonical* settings)

	if [ $SSH_MAJOR -gt 6 ]; then return; fi

	if [ $SSH_MAJOR -lt 6 ] || [ $SSH_MINOR -lt 6 ]; then

		echo '/Canonical/d;'

	fi

}

rule_runtime() {

	# Replace RUNTIME with the value of the RUNTIME variable

	[ -n "$RUNTIME" ] || die "RUNTIME not set"

	echo "s!${SED_WORD_START}RUNTIME${SED_WORD_END}!${RUNTIME-.}!g;"

}

make_config() {

	[ -z "${CONFIG-}" ] || return 0

	platform && ssh_version && runtime && config_sed

	PLATFORM_UNIQ="$PLATFORM:`hostname -f 2>/dev/null || hostname`:$SSH_MAJOR.$SSH_MINOR"

	PLATFORM_ID=`echo "$PLATFORM_UNIQ" | md5sum | cut -f1 -d' '`

	CONFIG="$RUNTIME/config-$PLATFORM_ID"

	if [ -f "$CONFIG" ] &&

		[ "$CONFIG" -nt ~/.ssh/config ] &&

		[ "$CONFIG" -nt $0 ] &&

		(! [ -r ~/.ssh/config.local ] || [ "$CONFIG" -nt ~/.ssh/config.local ])

	then

		return

	fi

	cat ~/.ssh/config ~/.ssh/config.local 2>/dev/null |

		sed >"$CONFIG" "

			`rule_unix_sockets`

			`rule_canonisation`

			`rule_runtime`

		"

}

# Ensure the GPG agent is running if installed

if has gpg-agent; then

	gpg-connect-agent /bye

	*' -F'*) exec ${SSH_BIN} "$@" ;;

	' --make-config'*) 

		make_config

		echo "$CONFIG"

		echo "$SSH_CONFIG"

		;;

	*)

		make_config

		PATH="`dirname $0`:$PATH"; export PATH

		exec ${SSH_BIN} -F "$CONFIG" "$@"

		exec ${SSH_BIN} -F "$SSH_CONFIG" "$@"

		;;

esac