e4s-info-install.sh

#!/usr/bin/sh

argError()
{
	echo
	echo "Invalid arguments -- \"$ARGS\""
	echo "Please use \"./e4s-info-install.sh -h\" or \"./e4s-info-install.sh --help\" to display more information"
	echo
	exit 1
}

argPath()
{
	echo
	echo "No access to directory: FIXME"
	echo "Please use \"./e4s-info-install.sh -h\" or \"./e4s-info-install.sh --help\" to display more information"
	echo
        exit 2
}

help()
{
	# Display Help
        echo "Usage: ./install.sh [OPTION]... [DIRECTORY]... "
        echo "Installs the e4s-info command and command manual"
	echo
        echo "Options:"
        echo "  -h	--help		Displays information about the command"
        echo "  --prefix=foo		Specifies the directory the e4s-info command will reside after execution; the path must be"
        echo "  --mandir=foo		Specifies the directory the manual entry for the e4s-info command will reside after execution"
	echo
        echo "Examples"
        echo "  ./install.sh						Installs the e4s-info command and manual files in the default locations, which are /usr/local/bin/ and /usr/local/share/man/man1/ respectively"
        echo "  ./install.sh --prefix=~/bin/				Installs the e4s-info command in ~/bin/ and the manual file in the default location"
	echo "  ./install.sh --mandir=~/man/man1/			Installs the e4s-info command in the default location and the manual file in ~/man/man1"
	echo "  ./install.sh --prefix=~/bin/ --mandir=~/man/man1/	Installs the e4s-info command in ~/bin/ and the manual file in ~/man/man1/"
	echo "  sudo ./install.sh					Installs the e4s-info command and manual files in the default locations, but uses sudo if permission was denied without sudo"
        echo
        echo "Exit Status:"
        echo " 0  if okay"
        echo " 1  if invalid arguments are passed"
        echo " 2  if an invalid --prefix=foo or --mandir is passed"
	echo " 3  if there is an error while making a directory or copying files"
        echo
	exit 0
}


ARGS=$*
PATHVAR=
MANPATHVAR=

while [ "$1" != "" ]; do
    case $1 in
    --prefix=*)
        PATHVAR="$(echo "$1" | cut -c 10-)"
	;;
    --mandir=*)
        MANPATHVAR="$(echo "$1" | cut -c 10-)"
        ;;
    -h | --help)
        help # run help function
        ;;
    *)
        # invalid option
	argError
        ;;
    esac
    shift # remove the current value for `$1` and use the next
done

echo

echo "Checking command PATH..."
if [ -z "$PATHVAR" ]; then
	echo "Setting command PATH to default (/usr/local/bin/)"
	PATHVAR="/usr/local/bin/"
else
	echo "Using specified command PATH"
	PATHVAR1=$(dirname "$PATHVAR")
	PATHVAR2=$(basename "$PATHVAR")
	PATHVAR="${PATHVAR1}/${PATHVAR2}/bin/"
fi

echo

echo "Checking command MANPATH..."
if [ -z "$MANPATHVAR" ]; then
	echo "Setting command MANPATH to default (/usr/local/share/man/man1/)"
	MANPATHVAR="/usr/local/share/man/man1/"
else
	echo "Using specified command MANPATH"
	MANVAR1=$(dirname "$MANPATHVAR")
	MANVAR2=$(basename "$MANPATHVAR")
	MANPATHVAR="${MANVAR1}/${MANVAR2}/man/man1/"
fi

echo

echo "PATH for command will be set to: $PATHVAR"
echo "MANPATH for the manual page will be set to: $MANPATHVAR"

echo

echo "Copying e4s-info command to $PATHVAR"

mkdir -p "$PATHVAR"
CHECKRET=$?
[ $CHECKRET -eq 0 ] || { echo "Problems making directory: $PATHVAR. Either use \"sudo\" before command if permission was denied, check target directory for name collisions, or check the command \"mkdir\" error code: $CHECKRET"; echo; exit 3; }
echo "Directory either already exists or was created"
cp -r e4s-info-command/* "$PATHVAR"
CHECKRET=$?
[ $CHECKRET -eq 0 ] || { echo "Problems copying command. Either use \"sudo\" before command if permission was denied, check target directory for name collisions, or check the command \"cp\" error code: $CHECKRET"; echo; exit 3; }

echo "Successfully copied e4s-info command to $PATHVAR"

echo

echo "Copying e4s-info manual file to $MANPATHVAR"
mkdir -p "$MANPATHVAR"
CHECKRET=$?
[ $CHECKRET -eq 0 ] || { echo "Problems making directory $MANPATHVAR. Either use \"sudo\" before command if permission was denied, check target directory for name collisions, or check the command \"mkdir\" error code: $CHECKRET"; echo; exit 3; }
echo "Directory either already exists or was created"
cp e4s-info-manual/e4s-info.1.gz "$MANPATHVAR"
CHECKRET=$?
[ $CHECKRET -eq 0 ] || { echo "Problems copying manual file. Either use \"sudo\" before command if permission was denied, check target directory for name collisions, or check the command \"cp\" error code: $CHECKRET"; echo; rm -r "${PATHVAR}"; exit 3; }

echo

echo "Successfully installed \"e4s-info\" command and manual page."
echo

BASEMANPATH=$(dirname "$MANPATHVAR")

echo "     export PATH=\$PATH:$PATHVAR"
echo "     export MANPATH=\$MANPATH:$BASEMANPATH"

echo

exit 0