tree 3090b60b03fac4dad1f246fbff2888e7174f7799
parent 049125e9b574bfcf819c2a1693862237c80bdd4b
author Wesley Moy <wesleymoy@google.com> 1593033491 -0700
committer CQ Bot <commit-bot@chromium.org> 1600130995 +0000

[fx][gn-sdk] Replace default key location

This allows for a per-user, per-workstation Fuchsia identity (SSH
keypair) that can be shared between fx and the GN SDK.

If //.fx-ssh-path doesn't exist, the message printed by 'fx gen' is:

```
ERROR at //third_party/openssh-portable/fuchsia/developer-keys/BUILD.gn:10:24: Could not read file.
  manifest = read_file("//.fx-ssh-path", "list lines")
                       ^---------------
I resolved this to ".../fuchsia/.fx-ssh-path".
See //products/core.gni:68:3: which caused the file to be included.
  "//third_party/openssh-portable/fuchsia/developer-keys:ssh_config",
  ^-----------------------------------------------------------------
```

Unfortunately GN doesn't have an easy way to either catch this error
or test if a file exists to print a more user-friendly error message, so
this CL adds an explanation to the BUILD.gn in case the affected user
looks into the file mentioned in the error message.

Change-Id: I1cd0f8193612be2fdbf91cf4cf4d833826cd8f26
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/openssh-portable/+/402175
Commit-Queue: Wesley Moy <wesleymoy@google.com>
Reviewed-by: Renato Mangini Dias <mangini@google.com>
Reviewed-by: James Tucker <raggi@google.com>