#!/bin/bash
# Copyright (c) Luke Davis, 2023, all rights reserved.
# This script is contributed to the public domain, and by using it you agree to assume all responsibility for whatever happens by using it.
# Feel free to fold, mutilate, spindle, or twist it out of all recognition. Just don't come cryin' to me when it breaks.

set -e

# To change the diffing or sorting options from defaults, alter the below
diffOpts=""
sortOpts=""

function usage {
echo 1>&2 "Usage: $0 OLD_LIBRARY_ZIP NEW_LIBRARY_ZIP"
echo 1>&2 "Outputs a diff to STDOUT, you may want to redirect."
exit 255
}

# Need two files
[[ -z "$1" || -z "$2" ]] && usage
# Files must exist
[[ -f "$1" && -f "$2" ]] || {
echo 1>&2 "One or both of the input files does not exist or can not be read."
usage
}

# Create a temporary directory, and delete it when done
tmpDir=$(mktemp -qd)
trap 'rm -r "$tmpDir"' EXIT

mkdir "$tmpDir"/{1,2}

echo 1>&2 "Unzipping..."
unzip -qd "$tmpDir/1" "$1"
unzip -qd "$tmpDir/2" "$2"

# Change the list below, to control what gets excluded from the diff.
# It's okay if it appears in one, the other, both, or neither library.
# By default, it attempts to exclude obvious NVDA modules.
echo 1>&2 "Removing NVDA modules..."
xargs -r -I XXX <<"EOD" rm -rf "$tmpDir"/{1,2}/"XXX"
addonAPIVersion.pyc
addonHandler
_addonStore
addonStore
api.pyc
appModuleHandler.pyc
appModules
characterProcessing.pyc
buildVersion.pyc
_buildVersion.pyc
browseMode.pyc
braille.pyc
brailleTables.pyc
brailleViewer
brailleDisplayDrivers
brailleInput.pyc
bdDetect.pyc
baseObject.pyc
autoSettingsUtils
audioDucking.pyc
aria.pyc
colors.pyc
comHelper.pyc
comInterfaces
compoundDocuments.pyc
COMRegistrationFixes
config
contentRecog
controlTypes
core.pyc
cursorManager.pyc
diffHandler.pyc
displayModel.pyc
documentationUtils.pyc
documentBase.pyc
documentNavigation
driverHandler.pyc
easeOfAccess.pyc
editableText.pyc
eventHandler.pyc
exceptions.pyc
extensionPoints
fileUtils.pyc
garbageHandler.pyc
globalCommands.pyc
globalPluginHandler.pyc
globalPlugins
globalVars.pyc
gui
hidpi.pyc
hwIo
hwPortUtils.pyc
IAccessibleHandler
inputCore.pyc
installer.pyc
JABHandler.pyc
keyboardHandler.pyc
keyLabels.pyc
languageHandler.pyc
locale.pyc
localesData.pyc
locationHelper.pyc
logHandler.pyc
louisHelper.pyc
__main__.pyc
mathPres
mathType.pyc
monkeyPatches
mouseHandler.pyc
msoAutoShapeTypes.pyc
nvdaBuiltin.pyc
NVDAHelper.pyc
NVDAObjects
NVDAState.pyc
nvwave.pyc
objbase.pyc
objidl.pyc
oleacc.pyc
oleTypes.pyc
pythonConsole.pyc
queueHandler.pyc
review.pyc
RPCConstants.pyc
screenBitmap.pyc
screenExplorer.pyc
scriptHandler.pyc
sourceEnv.pyc
speech
speechDictHandler
speechViewer.pyc
speechXml.pyc
synthDriverHandler.pyc
synthDrivers
synthSettingsRing.pyc
systemUtils.pyc
tableUtils.pyc
textInfos
textUtils.pyc
tones.pyc
touchHandler.pyc
touchTracker.pyc
treeInterceptorHandler.pyc
UIAHandler
ui.pyc
updateCheck.pyc
utils
versionInfo.pyc
virtualBuffers
vision
visionEnhancementProviders
vkCodes.pyc
watchdog.pyc
wave.pyc
winAPI
winConsoleHandler.pyc
windowUtils.pyc
winGDI.pyc
winInputHook.pyc
winKernel.pyc
winUser.pyc
winVersion.pyc
XMLFormatting.pyc
EOD

echo 1>&2 "Sorting and diffing..."
cd "$tmpDir"
diff $diffOpts <(find 1 -type f -printf '%P\n' | sort $sortOpts) <(find 2 -type f -printf '%P\n' | sort $sortOpts)
cd - > /dev/null 2>&1