gomplate w/vault error: user: Current not implemented on linux/amd64

[drmdrew]

Example failure using gomplate inside a linux docker container:

nobody@5f067e23aa9a:/srv$ gomplate -v
gomplate version 1.2.1
nobody@5f067e23aa9a:/srv$ echo -n "{{(datasource \"vault\" \"secret\")}}" | gomplate -d vault="vault://"
2016/11/19 22:58:14 user: Current not implemented on linux/amd64

This looks to be due to os/user having a dependency on libc which is broken if CGO_ENABLED=0 when gomplate was built (see golang/go#11797)

vault/token_strategy.go:54:     u, err := user.Current()
vault/token_strategy_test.go:26:        u, err := user.Current()

[drmdrew]

Since cross-compiling several platforms with CGO_ENABLED is the very definition of non-trivial ... one approach would be to look for HOME (Mac+Linux) and USERPROFILE (Windows) environment variables and use those to locate ~/.vault-token for each supported platform.

[hairyhenderson]

Aw man, I'm so fired. I totally ran across this a week or 2 ago, too... 😞