Hi,
I would like to have a variable assignment happen after the execution of
one file promise, before a second one happens. I'm finding this
difficult, as I can't see a way to set a class depending on a variable
promise, which would seem to be the obvious way. To illustrate with the
code I'm trying to get working:-
bundle agent add_sshkeys_to_user(u, keys)
{
vars:
"keystore" string => "/var/cfengine3/ssh_cache";
"u_home" string => execresult("/bin/echo ~${u}", "useshell");
"key[$(keys)]" string => readfile("$(keystore)/$(keys).pub", "1024");
files:
"$(keystore)/."
comment => "Create the local cache directory if needed",
create => "true",
perms => mog("0700","root","root");
"$(keystore)/$(keys).pub"
comment => "Copy public keys from remote cache",
perms => mog("600","root", "root"),
copy_from => secure_cp("$(g.mst)/pub/$(keys).pub","$(g.phst)"),
action => if_elapsed("30");
"$(u_home)/.ssh/."
comment => "Create the .ssh directory if required",
create => "true",
perms => mog("0700", "$(u)", "$(u)"),
"$(u_home)/.ssh/authorized_keys"
comment => "Add defined keys to the authorized_keys file",
create => "true",
perms => mog("0600", "$(u)", "$(u)"),
edit_line => append_if_no_line("$(key[$(keys)])");
}
This bundle is called from a method: promise, and I'm trying to use it
to add ssh keys to already existing users. However, if the keys haven't
yet been copied to the local cache, then my readfile() calls fail, and I
end up with corrupt lines like $(key[username]) in my authorized keys file.
I need a way to force evaluation of the "key" array only after the files
have been copied locally, *and* then to execute the files: promises for
the authorized_keys file only once that evaluation has happened. I can
do the first bit by setting a class on completion of the copy file
promise, but I can't see a way to make the rest happen. I suppose I
could put the key variable evaluation and the later two file promises in
a separate bundle and call that with a method: promise, but I was hoping
there was a neater way.
Any help would be appreciated.
Thanks,
Mike
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