Install fails with command not found

[bilus]

$ curl https://oya.sh/get | bash
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  3039  100  3039    0     0  13563      0 --:--:-- --:--:-- --:--:-- 13566
Checking required tools:
 Sops -> OK (sops 3.2.0 (latest))
Installing Oya v0.0.4
bash: line 107: sha256sum: command not found
usage: grep [-abcDEFGHhIiJLlmnOoqRSsUVvwxZ] [-A num] [-B num] [-C[num]]
    [-e pattern] [-f file] [--binary-files=value] [--color=when]
    [--context[=num]] [--directories=action] [--label] [--line-buffered]
    [--null] [pattern] [file ...]
downloaded archive checksum failed
Done.

[magdalenasliwinska]

I had this issue on macOS mojave 10.14.3 and I solved it by upgrading coreutils package with following commands:

brew upgrade coreutils
brew link --overwrite coreutils

[bart84ek]

As i see this problem is related with MacOSX and coreutils ^. All even alipine images got sha256sum installed.
In this case we can:

• Inform user that we can't verify SHAsum, and ask if we want to process [y/n]. and install without checking.
• Inform that he needs to update coreutils and quit without installing.

[bart84ek]

no prompt, just warning that checksum will not be validated.
v0.0.8