Building on b10564a, adding tweaks that allow the module var count
search to act recursively, ensuring that a sitaution where something
like var.top gets passed to module middle, as var.middle, and then to
module bottom, as var.bottom, which is then used in a resource count.
A new problem was introduced by the prior fixes for destroy
interpolation messages when resources depend on module variables with
a _count_ attribute, this makes the variable crucial for properly
building the graph - even in destroys. So removing all module variables
from the graph as noops was overzealous.
By borrowing the logic in `DestroyEdgeInclude` we are able to determine
if we need to keep a given module variable relatively easily.
I'd like to overhaul the `Destroy: true` implementation so that it does
not depend on config at all, but I want to continue for now with the
targeted fixes that we can backport into the 0.6 series.
`azurerm_storage_account` access keys
Please note that we do NOT have the ability to manage the access keys -
we are just getting the keys that the account creates for us. To manage
the keys, you would need to use the azure portal still
Provider nodes interpolate their config during the input walk, but this
is very early and so it's pretty likely that any resources referenced are
entirely absent from the state.
As a special case then, we tolerate the normally-fatal case of having
an entirely missing resource variable so that the input walk can complete,
albeit skipping the providers that have such interpolations.
If these interpolations end up still being unresolved during refresh
(e.g. because the config references a resource that hasn't been created
yet) then we will catch that error on the refresh pass, or indeed on the
plan pass if -refresh=false is used.
A companion to the null_resource resource, this is here primarily to
enable manual quick testing of data sources workflows without depending
on any external services.
The "inputs" map gets copied to the computed "outputs" map on read,
"rand" gives a random number to exercise cases with constantly-changing
values (an anti-pattern!), and "has_computed_default" is settable in
config but computed if not set.
Internally a data source read is represented as a creation diff for the
resource, but in the UI we'll show it as a distinct icon and color so that
the user can more easily understand that these operations won't affect
any real infrastructure.
Unfortunately by the time we get to formatting the plan in the UI we
only have the resource names to work with, and can't get at the original
resource mode. Thus we're forced to infer the resource mode by exploiting
knowledge of the naming scheme.
New resources logically don't have "old values" for their attributes, so
showing them as updates from the empty string is misleading and confusing.
Instead, we'll skip showing the old value in a creation diff.
