FIX Ensuring composer can write to it's cache directory #122
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Resolves #121 . This pulls and slightly modifies the logic linked in the issue. In addition to that code this patch will check that the provided
HOME
environment variable is also writable before blindly assuming it's okay.This fix is not compatible with the SS3 line of this module and although we're in "Security fixes only" for that line I'll still PR a SS3 fix for this as it's a fairly critical bug.