This is a basic implementation of FilesystemMirrorSource for now aimed
only at the specific use-case of scanning the cache of provider plugins
Terraform will keep under the ".terraform" directory, as part of our
interim provider installer implementation for Terraform 0.13.
The full functionality of this will grow out in later work when we
implement explicit local filesystem mirrors, but for now the goal is to
use this just to inspect the work done by the automatic installer once
we switch it to the new provider-FQN-aware directory structure.
The various FIXME comments in this are justified by the limited intended
scope of this initial implementation, and they should be resolved by
later work to use FilesystemMirrorSource explicitly for user-specified
provider package mirrors.
These are utility functions to ease processing of lists of PackageMeta
elsewhere, once we have functionality that works with multiple packages
at once. The local filesystem mirror source will be the first example of
this, so these methods are motivated mainly by its needs.
This is just to have a centralized set of logic for converting from a
platform string (like "linux_amd64") to a Platform object, so we can do
normalization and validation consistently.
Although we tend to return these in contexts where at least one of these
values is implied, being explicit means that PackageMeta values are
self-contained and less reliant on such external context.
When making lists of providers (or lists that contain providers) it's
helpful to have a canonical ordering in order to produce deterministic
results.
This ordering has no semantic meaning and is just here for the sake of
having a predictable standard.
Previously the templatefile function would permit any arbitrary string as
a variable name, but due to the HCL template syntax it would be impossible
to refer to one that isn't a valid HCL identifier without causing an
HCL syntax error.
The HCL syntax errors are correct, but don't really point to the root
cause of the problem. Instead, we'll pre-verify that the variable names
are valid before we even try to render the template, and given a
specialized error message that refers to the vars argument expression as
the problematic part, which will hopefully make the resolution path
clearer for a user encountering this situation.
The syntax error still remains for situations where all of the variable
names are correct but e.g. the user made a typo referring to one, which
makes sense because in that case the problem _is_ inside the template.
This function has a number of different error cases with hopefully-helpful
error messages for each, so it's good to test we're getting the error
message we were actually expecting in each case.
* WIP: dynamic expand
* WIP: add variable and local support
* WIP: outputs
* WIP: Add referencer
* String representation, fixing tests it impacts
* Fixes TestContext2Apply_outputOrphanModule
* Fix TestContext2Apply_plannedDestroyInterpolatedCount
* Update DestroyOutputTransformer and associated types to reflect PlannableOutputs
* Remove comment about locals
* Remove module count enablement
* Removes allowing count for modules, and reverts the test,
while adding a Skip()'d test that works when you re-enable
the config
* update TargetDownstream signature to match master
* remove unnecessary method
Co-authored-by: James Bardin <j.bardin@gmail.com>
During destroy, the for expression may be unknown and evaluation will
fail. Destroy provisioners however can only reference the key value,
which is known in the address.
The provider FQN is becoming our primary identifier for a provider, so
it's important that we are clear about the equality rules for these
addresses and what characters are valid within them.
We previously had a basic regex permitting ASCII letters and digits for
validation and no normalization at all. We need to do at least case
folding and UTF-8 normalization because these names will appear in file
and directory names in case-insensitive filesystems and in repository
names such as on GitHub.
Since we're already using DNS-style normalization and validation rules
for the hostname part, rather than defining an entirely new set of rules
here we'll just treat the provider namespace and type as if they were
single labels in a DNS name. Aside from some internal consistency, that
also works out nicely because systems like GitHub use organization and
repository names as part of hostnames (e.g. with GitHub Pages) and so
tend to apply comparable constraints themselves.
This introduces the possibility of names containing letters from alphabets
other than the latin alphabet, and for latin letters with diacritics.
That's consistent with our introduction of similar support for identifiers
in the language in Terraform 0.12, and is intended to be more friendly to
Terraform users throughout the world that might prefer to name their
products using a different alphabet. This is also a further justification
for using the DNS normalization rules: modern companies tend to choose
product names that make good domain names, and now such names will be
usable as Terraform provider names too.
configs.Module is accessible.
Continuing the work of removing all calls to addrs.NewLegacyProvider,
this commit uses configs.Module.ProviderForLocalConfig wherever the
caller has access to that Module.
EvalContext.InitProvider no longer needs the redundant typ String
terraform.contextComponentFactory refactored to take an addrs.Provider
instead of a string.
Added configs.Module.ProviderForLocalProviderConfig which allows
terraform.ProviderTransformer to get the provider FQN from the module,
instead of assuming NewLegacyProvider.
We're not far enough along yet to be able to actually use the
RepetitionData instances provided by the instances package, but having
these types be considered identical will help us to gradually migrate over
as we prepare the rest of Terraform to properly populate the Expander.
This is a minimal integration of instances.Expander used just for resource
count and for_each, for now just forcing modules to always be singletons
because the rest of Terraform Core isn't ready to deal with expanding
module calls yet.
This doesn't integrate super cleanly yet because we still have some
cleanup work to do in the design of the plan walk, to make it explicit
that the nodes in the plan graph represent static configuration objects
rather than expanded instances, including for modules. To make this work
in the meantime, there is some shimming between addrs.Module and
addrs.ModuleInstance to correct for the discontinuities that result from
the fact that Terraform currently assumes that modules are always
singletons.
This is not used yet, but in future commits will be used as a
"blackboard" to centrally aggregate the information pertaining to
expansion of resources and modules (using "count" or "for_each") to help
ensure consistent treatment of the expansion process during a graph walk.
In practice this only really makes sense for the plan walk, because the
apply walk doesn't do any dynamic expansion.
This package aims to encapsulate the module/resource repetition problem
so that Terraform Core's graph node DynamicExpand implementations can be
simpler.
This is also a building block on the path towards module repetition, by
modelling the recursive expansion of modules and their contents. This will
allow the Terraform Core plan graph to have one node per configuration
construct, each of which will DynamicExpand into as many sub-nodes as
necessary to cover all of the recursive module instantiations.
For the moment this is just dead code, because Terraform Core isn't yet
updated to use it.
When ModuleInstanceStep values appear alone in debug messages, it's easier
to read them in a compact, HCL-like form than as the default struct
printing style.
Martin Atkins