Commit Graph

12 Commits

Author SHA1 Message Date
James Bardin b515ab583a make blocktoattr an hcldec.UnknownBody
This will allow any dynamic blocks that are fixed up as a blocktoattr
still decode into an unknown value.
2021-04-13 18:42:15 -04:00
James Bardin dd8a8bdea1 add benchmark used for DecoderSpec
Not a great benchmark, but record it here for posterity. Practical
testing with the AWS provider gives us a 98% speedup for simple plans.
2020-10-14 09:19:26 -04:00
Martin Atkins 39e609d5fd vendor: switch to HCL 2.0 in the HCL repository
Previously we were using the experimental HCL 2 repository, but now we'll
shift over to the v2 import path within the main HCL repository as part of
actually releasing HCL 2.0 as stable.

This is a mechanical search/replace to the new import paths. It also
switches to the v2.0.0 release of HCL, which includes some new code that
Terraform didn't previously have but should not change any behavior that
matters for Terraform's purposes.

For the moment the experimental HCL2 repository is still an indirect
dependency via terraform-config-inspect, so it remains in our go.sum and
vendor directories for the moment. Because terraform-config-inspect uses
a much smaller subset of the HCL2 functionality, this does still manage
to prune the vendor directory a little. A subsequent release of
terraform-config-inspect should allow us to completely remove that old
repository in a future commit.
2019-10-02 15:10:21 -07:00
Pam Selle 234c1c482a Add a comment 2019-08-02 16:15:18 -04:00
Pam Selle cd83e6108d Fixes issue where attribute in nested is not of list type/is invalid and would panic 2019-08-02 16:08:16 -04:00
James Bardin 6e222375c7 invlaid use of dynamic with attrs should not panic
Mistakenly using dynamic on an attribute will lead to a panic when
attempting to resolve variable references with a partial body, because
the dynamic blocks have yet to be expanded and validated. Check that the
block element type is actually an object before generating a schema.
2019-07-22 17:16:18 -04:00
James Bardin 0133dda311 allow empty dynamic blocks with ConfigModeAttr
If a dynamic block is evaluated zero times, the body content will
contain 0 blocks. Allow the probe for ConfigModeAttr to accept that no
blocks with a matching attribute should still be converted to a block if
they are called with dynamicExpand.
2019-05-31 16:31:24 -05:00
Martin Atkins ffcf9fc51b lang/blocktoattr: Apply fixup within already-fixed-up blocks too
When a top-level list-of-object contains an attribute that is also
list-of-object we need to do the fixup again inside the nested body (using
our synthetic attributes-only schema) so that the attr-as-blocks mechanism
can apply within the nested blocks too.
2019-04-05 14:22:41 -07:00
Martin Atkins 6c5819f910 configs/configupgrade: Prefer block syntax for list-of-object attributes
In order to preserve pre-v0.12 idiom for list-of-object attributes, we'll
prefer to use block syntax for them except for the special situation where
the user explicitly assigns an empty list, where attribute syntax is
required in order to allow existing provider logic to differentiate from
an implicit lack of blocks.
2019-04-01 13:30:24 -07:00
Martin Atkins 003317d7c8 lang: Detect references when a list/set attr is defined using blocks
For compatibility with documented patterns from existing providers we are
now allowing (via a pre-processing step) any attribute whose type is a
list-of-object or set-of-object type to optionally be assigned using one
or more blocks whose type is the attribute name.

The pre-processing functionality was implemented in previous commits but
we were not correctly detecting references within these blocks that are,
from the perspective of the primary schema, invalid. Now we'll use an
alternative implementation of variable detection that is able to apply the
same schema rewriting technique we used to implement the transform and
thus can find all of the references as if they were already in their
final locations.
2019-03-28 10:41:01 -07:00
Martin Atkins 8746e9e8ad lang/blocktoattr: ExpandedVariables function
Because we handle FixUpBlockAttrs after dynamic block expansion, when
resolving variables we unfortunately need to consider the possibility of
both dynamic block expansion _and_ the block attrs fixup.

To accommodate this we have a variant of dynblock.VariablesHCLDec that
instead walks using the configschema.Block representation of the schema
and applies the same opportunistic schema rewrite used by FixUpBlockAttrs
at each body encountered during the walk.
2019-03-28 10:41:01 -07:00
Martin Atkins 6dcf8195b8 lang/blocktoattr: Selectively allow block syntax to be used for attributes
This preprocessing step allows users to use nested block syntax to specify
elements of an attribute that is defined as being a list or set of an
object type.

This restores part of the unintended flexibility permitted in Terraform
v0.11 so that we can work around a few tricky edges where provider
implementations were relying on Terraform's failure to validate this in
earlier versions.

For any body that is pre-processed using this new helper, we will
recognize when a configuration author uses nested block syntax with a
name that is specified in the schema as an attribute of a suitable type
and tweak the schema just in time before decoding to expect that usage
and then fix up the result on the way out to conform to the original
schema.

Achieving this requires an abstraction inversion because only Terraform's
high-level schema has enough information to decide how to rewrite the
incoming low-level schema. We must therefore here implement HCL's
lowest-level API interface in terms of the higher-level abstractions of
hcldec and Terraform's configschema.

Because of the abstraction inversion this fixup mechanism cannot be used
generally for arbitrary HCL bodies but we can use it carefully inside the
lang package where its own API can guarantee the necessary invariants for
this to work.
2019-03-28 10:41:01 -07:00