Extract the Augmented Transaction List from the setup log of Cygwin, which is a list showing which packages we installed in a clear way.
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Cygwin's official installer is the Package Manager for Cygwin packages. However, it doesn't keep track which packages were installed manually and which are just dependencies. (the "Picked" filter won't show libraries)
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By extracting the transaction list, we can figure out when, and ideally why, a package has been installed by ourselves.
