which returns: -
[WARN] Unable to checkout crypto/tls
[ERROR] Error looking for crypto/tls: Cannot detect VCS
I'm using Glide 0.13.2, and Go versions 1.10.6 and 1.11.5.
Using the more detailed glide --debug update, I found a wee bit more detail: -
[DEBUG] ImportDir error on /Users/hayd/.glide/cache/src/https-crypto-tls: cannot find package "." in:
*BUT* this did lead me to look at my Git source folder - $GOPATH/src - which, amongst other things had this: -
drwxr-xr-x 3 hayd staff 96 29 Mar 19:31 crypto
which was a directory containing a sinmgle empty subdirectory: -
drwxr-xr-x 2 hayd staff 64 29 Mar 19:33 tls
So this kinda tied up with the symptom shown up in the --debug trace i.e. cannot find package "." even though it was in a completely different place.
Once I did rm -Rf $GOPATH/src/crypto, the glide update worked a treat.
I'd previously gone down a rabbit hole with glide clear-cache and glide mirror, both of which were poisson rouge.
Hope this helps others in the same situation :-)