di-acorn.sh

#!/usr/bin/env zsh -f
# Purpose: Download and install/update the latest version of Acron
#
# From:	Timothy J. Luoma
# Mail:	luomat at gmail dot com
# Date:	2019-10-24

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

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

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

NAME="$0:t:r"

	## Only the most recent version is in feed
XML_FEED="https://www.flyingmeat.com/download/acorn7update.xml"

	# save XML_FEED locally so we can refer to it without having to download it multiple times
TEMPFILE="${TMPDIR-/tmp}/${NAME}.${TIME}.$$.$RANDOM.xml"

curl -sfLS "$XML_FEED" > "$TEMPFILE"

INFO=($(awk '/<enclosure /{i++}i==1' "$TEMPFILE" | tr ' ' '\012' | egrep '^(url|sparkle:(shortVersionString|version))="' | sort | tr '"' ' ' | awk '{print $NF}'))

LATEST_VERSION="$INFO[1]"

LATEST_BUILD="$INFO[2]"

URL="$INFO[3]"

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

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

	INSTALLED_BUILD=$(defaults read "${INSTALL_TO}/Contents/Info" CFBundleVersion)

	autoload is-at-least

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

	VERSION_COMPARE="$?"

	is-at-least "$LATEST_BUILD" "$INSTALLED_BUILD"

	BUILD_COMPARE="$?"

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

	echo "$NAME: Outdated: $INSTALLED_VERSION/$INSTALLED_BUILD vs $LATEST_VERSION/$LATEST_BUILD"

	FIRST_INSTALL='no'

else

	FIRST_INSTALL='yes'
fi

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

RELEASE_NOTES_TXT="$FILENAME:r.txt"

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

	cat "$RELEASE_NOTES_TXT"

else

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

			# we are either going to use this once (if we also have 'html2text.py')
			# or twice if we do not

		alias lynx_dump='lynx -dump -nomargins -width=10000 -assume_charset=UTF-8 -display_charset=UTF-8 -pseudo_inlines -stdin'

		if (( $+commands[html2text.py] ))
		then

			alias final_cmd='html2text.py'

		else

			alias final_cmd='lynx_dump'

		fi

			# Putting this tidy command in the RELEASE_NOTES section was just too ugly for me
			# normally I would put this in a tidy config file, but I want this to be self-contained
			# but having it separate allows it to be modified easier later on
			# I tried to group all the 'no' and all of the 'yes' together
			# with all of the other options in the first line
		alias tidy_up_html='tidy --char-encoding utf8 --wrap 0 --show-errors 0 \
				--tidy-mark no --input-xml no --output-xml no --quote-nbsp no --show-warnings no --uppercase-attributes no --uppercase-tags no \
				--clean yes --force-output yes --join-classes yes --join-styles yes --indent yes --markup yes --output-xhtml yes \
				--quiet yes --quote-ampersand yes --quote-marks yes'

		RELEASE_NOTES=$(awk '/<description>/{i++}i==2' "$TEMPFILE" \
			| sed -e '/<\/description>/,$d' -e 's#<description>##g' \
			| lynx_dump \
			| tidy_up_html \
			| final_cmd )

			echo "${RELEASE_NOTES}\n\nSource: ${XML_FEED}\nVersion: ${LATEST_VERSION} / ${LATEST_BUILD}\nURL: ${URL}" \
			| tee "$RELEASE_NOTES_TXT"

	fi

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

egrep -q '^Local sha256:$' "$FILENAME:r.txt" 2>/dev/null

EXIT="$?"

if [ "$EXIT" = "1" -o ! -e "$FILENAME:r.txt" ]
then
	(cd "$FILENAME:h" ; \
	echo "\n\nLocal sha256:" ; \
	shasum -a 256 "$FILENAME:t" \
	) >>| "$FILENAME:r.txt"
fi


## make sure that the .zip is valid before we proceed
(command unzip -l "$FILENAME" 2>&1 )>/dev/null

EXIT="$?"

if [ "$EXIT" = "0" ]
then
	echo "$NAME: '$FILENAME' is a valid zip file."

else
	echo "$NAME: '$FILENAME' is an invalid zip file (\$EXIT = $EXIT)"

	mv -fv "$FILENAME" "$HOME/.Trash/"

	mv -fv "$FILENAME:r".* "$HOME/.Trash/"

	exit 0

fi

## unzip to a temporary directory
UNZIP_TO=$(mktemp -d "${TMPDIR-/tmp/}${NAME}-XXXXXXXX")

echo "$NAME: Unzipping '$FILENAME' to '$UNZIP_TO':"

ditto -xk --noqtn "$FILENAME" "$UNZIP_TO"

EXIT="$?"

if [[ "$EXIT" == "0" ]]
then
	echo "$NAME: Unzip successful"
else
		# failed
	echo "$NAME failed (ditto -xkv '$FILENAME' '$UNZIP_TO')"

	exit 1
fi

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

	pgrep -xq "$INSTALL_TO:t:r" \
	&& LAUNCH='yes' \
	&& osascript -e "tell application \"$INSTALL_TO:t:r\" to quit"

	echo "$NAME: Moving existing (old) '$INSTALL_TO' to '$HOME/.Trash/'."

	mv -vf "$INSTALL_TO" "$HOME/.Trash/$INSTALL_TO:t:r.$INSTALLED_VERSION.app"

	EXIT="$?"

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

		echo "$NAME: failed to move existing $INSTALL_TO to $HOME/.Trash/"

		exit 1
	fi
fi

echo "$NAME: Moving new version of '$INSTALL_TO:t' (from '$UNZIP_TO') to '$INSTALL_TO'."

	# Move the file out of the folder
mv -vn "$UNZIP_TO/$INSTALL_TO:t" "$INSTALL_TO"

EXIT="$?"

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

	echo "$NAME: Successfully installed '$UNZIP_TO/$INSTALL_TO:t' to '$INSTALL_TO'."

else
	echo "$NAME: Failed to move '$UNZIP_TO/$INSTALL_TO:t' to '$INSTALL_TO'."

	exit 1
fi

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

exit 0
#EOF