Skip migration if cache is empty or doesn’t exist.
Skip migration if cache is empty or doesn’t exist.

nandub/brew,Linuxbrew/brew,claui/brew,maxim-belkin/brew,DomT4/brew,vitorgalvao/brew,Homebrew/brew,DomT4/brew,vitorgalvao/brew,mahori/brew,konqui/brew,nandub/brew,MikeMcQuaid/brew,Linuxbrew/brew,MikeMcQuaid/brew,DomT4/brew,claui/brew,sjackman/homebrew,maxim-belkin/brew,mahori/brew,Homebrew/brew,Linuxbrew/brew,nandub/brew,JCount/brew,vitorgalvao/brew,claui/brew,reitermarkus/brew,reitermarkus/brew,reitermarkus/brew,JCount/brew,EricFromCanada/brew,sjackman/homebrew,EricFromCanada/brew,Homebrew/brew,sjackman/homebrew,Linuxbrew/brew,mahori/brew,MikeMcQuaid/brew,Homebrew/brew,konqui/brew,mahori/brew,konqui/brew,EricFromCanada/brew,maxim-belkin/brew,vitorgalvao/brew,konqui/brew,JCount/brew,MikeMcQuaid/brew,nandub/brew,reitermarkus/brew,EricFromCanada/brew,JCount/brew,sjackman/homebrew,claui/brew,DomT4/brew