On Tue, Jun 15, 2021 at 11:33:58AM +0900, Junio C Hamano wrote: > Johannes Schindelin <Johannes.Schindelin@xxxxxx> writes: > > >> `test FILE1 -ef FILE2` checks wether the inode is the same. And it's > >> POSIX, so I'm assuming that it's sufficiently portable, though I > >> haven't actually tested whether things other than Bash implement it. > > > > It's not POSIX. From > > https://pubs.opengroup.org/onlinepubs/009695399/utilities/test.html: > > > > Some additional primaries newly invented or from the KornShell > > appeared in an early proposal as part of the conditional command > > ([[]]): s1 > s2, s1 < s2, str = pattern, str != pattern, > > f1 -nt f2, f1 -ot f2, and f1 -ef f2. > > > > Having said that, it appears that Bash implements it (what non-standard > > behavior _doesn't_ it implement ;-)) > > > > And since Git for Windows ships with Bash, we can actually use it! > > So,... is contrib/subtree for Windows only? I read it as "this workaround is needed only on Windows, and will kick in only there; on other platforms, the "-ef" code will not run at all, so we don't have to worry about its portability". But having seen the earlier part of the thread, it looks like "are we on Windows" is predicated on "! type -p cygpath", which seems a bit loose. I also think "-p" is a bash-ism, so we'd want to avoid it before determining whether we're on Windows to avoid a chicken-and-egg on other platforms. -Peff
