years ago I used a change management system ( maybe PVCS ) where you could add code to the files so that the metadata ( commit date, comment ) showed up in the file you were downloading. Does GitHub have anything like this ?

CodePudding user response：

1. Any "keyword expansion" is a feature of tool, while GitHub is just service on top of tool (Git)
2. As noted by @phd, you can have (beware of headache) keyword expansion in Git with gitattibutes, but more native and natural way is using own smudge clean filters, not hardcoded subset of keywords