di-calibre.sh

#!/usr/bin/env zsh -f
# Purpose: Download and install new version of Calibre
#
# From:	Tj Luo.ma
# Mail:	luomat at gmail dot com
# Web: 	http://RhymesWithDiploma.com
# Date:	2014-07-25

NAME="$0:t:r"

[[ -e "$HOME/.path" ]] && source "$HOME/.path"

[[ -e "$HOME/.config/di/defaults.sh" ]] && source "$HOME/.config/di/defaults.sh"

INSTALL_TO="${INSTALL_DIR_ALTERNATE-/Applications}/calibre.app"

HOMEPAGE="https://calibre-ebook.com"

DOWNLOAD_PAGE="https://calibre-ebook.com/download_osx"

SUMMARY="calibre is a powerful and easy to use e-book manager."

LATEST_VERSION=$(curl -sfL 'http://status.calibre-ebook.com/latest')

	# curent version is empty, something went wrong
[[ "$LATEST_VERSION" = "" ]] && exit 1

URL="http://download.calibre-ebook.com/${LATEST_VERSION}/calibre-${LATEST_VERSION}.dmg"

if [[ -e "$INSTALL_TO" ]]
then

	INSTALLED_VERSION=$(defaults read "${INSTALL_TO}/Contents/Info" CFBundleShortVersionString)

	autoload is-at-least

	is-at-least "$LATEST_VERSION" "$INSTALLED_VERSION"

	VERSION_COMPARE="$?"

	if [ "$VERSION_COMPARE" = "0" ]
	then
		echo "$NAME: Up-To-Date ($INSTALLED_VERSION / $LATEST_VERSION)"
		exit 0
	fi

	echo "$NAME: Outdated: $INSTALLED_VERSION vs $LATEST_VERSION"

	FIRST_INSTALL='no'

else

	FIRST_INSTALL='yes'
fi

########################################################################################################################

FILENAME="$HOME/Downloads/$INSTALL_TO:t:r-${LATEST_VERSION}.dmg"

########################################################################################################################

if (( $+commands[lynx] ))
then

	RELEASE_NOTES_URL="https://calibre-ebook.com/whats-new"

	( echo "$NAME: Release Notes for $INSTALL_TO:t:r\n" ;
		curl -sfL "${RELEASE_NOTES_URL}" \
		| sed '1,/<div class="release">/d; /<div class="release">/,$d' \
		| lynx -dump -nomargins -width='10000' -assume_charset=UTF-8 -pseudo_inlines -stdin ;
		echo "\nSource: <$RELEASE_NOTES_URL>" ) \
	| tee "$FILENAME:r.txt"

fi

########################################################################################################################

echo "$NAME: Downloading '$URL' to '$FILENAME':"

curl --continue-at - --fail --location --output "$FILENAME" "$URL"

EXIT="$?"

	## exit 22 means 'the file was already fully downloaded'
[ "$EXIT" != "0" -a "$EXIT" != "22" ] && echo "$NAME: Download of $URL failed (EXIT = $EXIT)" && exit 0

[[ ! -e "$FILENAME" ]] && echo "$NAME: $FILENAME does not exist." && exit 0

[[ ! -s "$FILENAME" ]] && echo "$NAME: $FILENAME is zero bytes." && rm -f "$FILENAME" && exit 0

(cd "$FILENAME:h" ; echo "\nLocal sha256:" ; shasum -a 256 "$FILENAME:t" ) >>| "$FILENAME:r.txt"

####|####|####|####|####|####|####|####|####|####|####|####|####|####|####
#
#		Installation
#

echo "$NAME: Mounting $FILENAME:"

MNTPNT=$(hdiutil attach -nobrowse -plist "$FILENAME" 2>/dev/null \
	| fgrep -A 1 '<key>mount-point</key>' \
	| tail -1 \
	| sed 's#</string>.*##g ; s#.*<string>##g')

if [[ "$MNTPNT" == "" ]]
then
	echo "$NAME: MNTPNT is empty"
	exit 1
else
	echo "$NAME: MNTPNT is $MNTPNT"
fi

if [[ -e "$INSTALL_TO" ]]
then
		# Quit app, if running
	pgrep -xq "$INSTALL_TO:t:r" \
	&& LAUNCH='yes' \
	&& osascript -e "tell application \"$INSTALL_TO:t:r\" to quit"

		# move installed version to trash
	mv -vf "$INSTALL_TO" "$HOME/.Trash/$INSTALL_TO:t:r.${INSTALLED_VERSION}_${INSTALLED_BUILD}.app"

	EXIT="$?"

	if [[ "$EXIT" != "0" ]]
	then

		echo "$NAME: failed to move '$INSTALL_TO' to Trash. ('mv' \$EXIT = $EXIT)"

		exit 1
	fi

fi

echo "$NAME: Installing '$MNTPNT/$INSTALL_TO:t' to '$INSTALL_TO': "

ditto --noqtn -v "$MNTPNT/$INSTALL_TO:t" "$INSTALL_TO"

EXIT="$?"

if [[ "$EXIT" == "0" ]]
then
	echo "$NAME: Successfully installed $INSTALL_TO"
else
	echo "$NAME: ditto failed"

	exit 1
fi

[[ "$LAUNCH" = "yes" ]] && open -a "$INSTALL_TO"

echo -n "$NAME: Unmounting $MNTPNT: " && diskutil eject "$MNTPNT"

exit 0
#
#EOF