Create pkg MacOS installer with macos-installer-builder

We are going to create a pkg that copies some files to the /Library directory. We will use the tool macos-installer-builder, which could be downloaded from https://github.com/KosalaHerath/macos-installer-builder

The usage of this tool has been well explained in the github page. The default build-macos-x64.sh script requires two parameters: product name and product version. We are going to modify this script to generate a pkg installer that copies the application files into a fixed directory.

1. copy the application's files into ./application/ folder
2. comment the section in #Argument validation which validates the product name and product version parameters. Since we are not going to use the input parameters.
3. change PRODUCT and VERSION variables to strings.
4. change in function copyBuildDirectory the three commands below #Copy cellery product to /Library/Cellery, \${PRODUCT}/\${VERSION} to the fixed target directory
5. comment createUninstaller command, since I don't use it.
6. add commands in postinstall script, such as changing the permission.

Finally, run bash build-macos-x64.sh to generate the pkg installer.

Compile and load kext

The problem is that I use MacOS 10.15, and the sdk is already installed in the folder:

/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/

So if I do "ls" to this folder, it shows:

DriverKit19.0.sdk MacOSX.sdk MacOSX10.15.sdk

Now I need to copy 10.14 sdk to this folder. The first thing I did is "svn export" the 10.14 sdk from

https://github.com/alexey-lysiuk/macos-sdk/tree/master/MacOSX10.14.sdk

I use this command, replace "tree/master" by "trunk":

svn export https://github.com/alexey-lysiuk/macos-sdk/trunk/MacOSX10.14.sdk

Then I "sudo cp -r" this folder to my SDKs folder. For compiling the project, I used:

xcodebuild -project "projectName.xcodeproj" -scheme "schemeName" -sdk macosx10.14 -derivedDataPath build clean build

Finally I changed the ownership of the kext:

sudo chown -R root:wheel yourKext.kext