I recently had to upgrade DataMapper which has lots of separate gems for different bits of functionality. Rather than typing them all in manually, I wrote a one-liner to do it. Firstly, we have a list of gems on the computer, and then we grep for "dm":
So we have a list of gems.. but we need to remove the version number brackets (0.10.2, 0.10.1). To do this there are a number of options, but we will use sed:
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