[Dependabot](deps): Bump github.com/hashicorp/hcl/v2 from 2.15.0 to 2.18.0

[dependabot]

Bumps github.com/hashicorp/hcl/v2 from 2.15.0 to 2.18.0.

Release notes

Sourced from github.com/hashicorp/hcl/v2's releases.

v2.18.0

Enhancements

• HCL now uses the tables from Unicode 15 when performing string normalization and character segmentation. HCL was previously using the Unicode 13 tables.

  For calling applications where consistent Unicode support is important, consider also upgrading to Go 1.21 at the same time as adopting HCL v2.18.0 so that the standard library unicode tables (used for case folding, etc) will also be from Unicode 15.

v2.17.1

Enhancements

• hclsyntax: When evaluating string templates that have a long known constant prefix, HCL will truncate the known prefix to avoid creating excessively-large refinements. String prefix refinements are intended primarily for relatively-short fixed prefixes, such as https:// at the start of a URL known to use that scheme. (#617)
• ext/tryfunc: The "try" and "can" functions now handle unknown values slightly more precisely, and so can return known values in more situations when given expressions referring to unknown symbols. (#622)

Bugs Fixed

• ext/typeexpr: Will no longer try to refine unknown values of unknown type when dealing with a user-specified type constraint containing the any keyword, avoiding an incorrect panic at runtime. (#625)
• ext/typeexpr: Now correctly handles attempts to declare the same object type attribute multiple times by returning an error. Previously this could potentially panic by creating an incoherent internal state. (#624)

v2.17.0

Enhancements

• HCL now uses a newer version of the upstream cty library which has improved treatment of unknown values: it can now track additional optional information that reduces the range of an unknown value, which allows some operations against unknown values to return known or partially-known results. (#590)

  Note: This change effectively passes on cty's notion of backward compatibility whereby unknown values can become "more known" in later releases. In particular, if your caller is using cty.Value.RawEquals in its tests against the results of operations with unknown values then you may see those tests begin failing after upgrading, due to the values now being more "refined".

  If so, you should review the refinements with consideration to the cty refinements docs and update your expected results to match only if the reported refinements seem correct for the given situation. The RawEquals method is intended only for making exact value comparisons in test cases, so main application code should not use it; use Equals instead for real logic, which will take refinements into account automatically.

v2.16.2

Bugs Fixed

• ext/typeexpr: Verify type assumptions when applying default values, and ignore input values that do not match type assumptions. (#594)

v2.16.1

Bugs Fixed

• hclsyntax: Report correct Range.End for FunctionCall with incomplete argument (#588)

v2.16.0

Enhancements

• ext/typeexpr: Modify the Defaults functionality to implement additional flexibility. HCL will now upcast lists and sets into tuples, and maps into objects, when applying default values if the applied defaults cause the elements within a target collection to have differing types. Previously, this would have resulted in a panic, now HCL will return a modified overall type. (hashicorp/hcl#574)

  Users should return to the advice provided by v2.14.0, and apply the go-cty convert functionality after setting defaults on a given cty.Value, rather than before.

• hclfmt: Avoid rewriting unchanged files. (hashicorp/hcl#576)

• hclsyntax: Simplify the AST for certain string expressions. (hashicorp/hcl#584)

Bugs Fixed

... (truncated)

Changelog

Sourced from github.com/hashicorp/hcl/v2's changelog.

v2.18.0 (August 30, 2023)

Enhancements

• HCL now uses the tables from Unicode 15 when performing string normalization and character segmentation. HCL was previously using the Unicode 13 tables.

  For calling applications where consistent Unicode support is important, consider also upgrading to Go 1.21 at the same time as adopting HCL v2.18.0 so that the standard library unicode tables (used for case folding, etc) will also be from Unicode 15.

v2.17.1 (August 30, 2023)

Enhancements

• hclsyntax: When evaluating string templates that have a long known constant prefix, HCL will truncate the known prefix to avoid creating excessively-large refinements. String prefix refinements are intended primarily for relatively-short fixed prefixes, such as https:// at the start of a URL known to use that scheme. (#617)
• ext/tryfunc: The "try" and "can" functions now handle unknown values slightly more precisely, and so can return known values in more situations when given expressions referring to unknown symbols. (#622)

Bugs Fixed

• ext/typeexpr: Will no longer try to refine unknown values of unknown type when dealing with a user-specified type constraint containing the any keyword, avoiding an incorrect panic at runtime. (#625)
• ext/typeexpr: Now correctly handles attempts to declare the same object type attribute multiple times by returning an error. Previously this could potentially panic by creating an incoherent internal state. (#624)

v2.17.0 (May 31, 2023)

Enhancements

• HCL now uses a newer version of the upstream cty library which has improved treatment of unknown values: it can now track additional optional information that reduces the range of an unknown value, which allows some operations against unknown values to return known or partially-known results. (#590)

  Note: This change effectively passes on cty's notion of backward compatibility whereby unknown values can become "more known" in later releases. In particular, if your caller is using cty.Value.RawEquals in its tests against the results of operations with unknown values then you may see those tests begin failing after upgrading, due to the values now being more "refined".

  If so, you should review the refinements with consideration to the cty refinements docs and update your expected results to match only if the reported refinements seem correct for the given situation. The RawEquals method is intended only for making exact value comparisons in test cases, so main application code should not use it; use Equals instead for real logic, which will take refinements into account automatically.

v2.16.2 (March 9, 2023)

Bugs Fixed

• ext/typeexpr: Verify type assumptions when applying default values, and ignore input values that do not match type assumptions. (#594)

v2.16.1 (February 13, 2023)

Bugs Fixed

• hclsyntax: Report correct Range.End for FunctionCall with incomplete argument (#588)

v2.16.0 (January 30, 2023)

Enhancements

• ext/typeexpr: Modify the Defaults functionality to implement additional flexibility. HCL will now upcast lists and sets into tuples, and maps into objects, when applying default values if the applied defaults cause the elements within a target collection to have differing types. Previously, this would have resulted in a panic, now HCL will return a modified overall type. (#574)

  Users should return to the advice provided by v2.14.0, and apply the go-cty convert functionality after setting defaults on a given cty.Value, rather than before.

• hclfmt: Avoid rewriting unchanged files. (#576)

... (truncated)

Commits

• b82f55a v2.18.0 release
• edfd5c9 Use Unicode 15 tables for unicode normalization and segmentation
• fef0406 v2.17.1 release
• 6b8265e Merge pull request #624 from hashicorp/terraform-33757
• 3617411 hcldec: A test case for attributes set to cty.DynamicVal with refinements
• ed6d4bf ext/typeexpr: Avoid refinements on dynamic values
• 4259e4b Check for duplicate keys in objects when building types from expressions
• a9f8d65 Merge pull request #622 from hashicorp/jbardin/can-try-unknowns
• 6af2870 Allow can and try functions to handle more unknown
• 527ec31 hclsyntax: Impose an upper limit on a refined prefix in TemplateExpr
• Additional commits viewable in compare view

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[kaidaguerre]

@dependabot rebase.