terraform/configs/provider_requirements.go

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package configs
import (
version "github.com/hashicorp/go-version"
"github.com/hashicorp/hcl/v2"
"github.com/hashicorp/terraform/addrs"
)
// RequiredProvider represents a declaration of a dependency on a particular
// provider version or source without actually configuring that provider. This
// is used in child modules that expect a provider to be passed in from their
// parent.
type RequiredProvider struct {
Name string
Source Source
Requirement VersionConstraint
}
type Source struct {
SourceStr string
DeclRange hcl.Range
}
// ProviderRequirements represents merged provider version constraints.
// VersionConstraints come from terraform.require_providers blocks and provider
// blocks.
type ProviderRequirements struct {
Type addrs.Provider
VersionConstraints []VersionConstraint
}
func decodeRequiredProvidersBlock(block *hcl.Block) ([]*RequiredProvider, hcl.Diagnostics) {
attrs, diags := block.Body.JustAttributes()
var reqs []*RequiredProvider
for name, attr := range attrs {
expr, err := attr.Expr.Value(nil)
if err != nil {
diags = append(diags, err...)
}
switch {
case expr.Type().IsPrimitiveType():
vc, reqDiags := decodeVersionConstraint(attr)
diags = append(diags, reqDiags...)
reqs = append(reqs, &RequiredProvider{
Name: name,
Requirement: vc,
})
case expr.Type().IsObjectType():
ret := &RequiredProvider{Name: name}
if expr.Type().HasAttribute("version") {
vc := VersionConstraint{
DeclRange: attr.Range,
}
constraintStr := expr.GetAttr("version").AsString()
constraints, err := version.NewConstraint(constraintStr)
if err != nil {
// NewConstraint doesn't return user-friendly errors, so we'll just
// ignore the provided error and produce our own generic one.
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Invalid version constraint",
Detail: "This string does not use correct version constraint syntax.",
Subject: attr.Expr.Range().Ptr(),
})
} else {
vc.Required = constraints
ret.Requirement = vc
}
}
if expr.Type().HasAttribute("source") {
ret.Source.SourceStr = expr.GetAttr("source").AsString()
ret.Source.DeclRange = attr.Range
}
reqs = append(reqs, ret)
default:
// should not happen
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Invalid provider_requirements syntax",
Detail: "provider_requirements entries must be strings or objects.",
Subject: attr.Expr.Range().Ptr(),
})
reqs = append(reqs, &RequiredProvider{Name: name})
return reqs, diags
}
}
return reqs, diags
}