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package configs
import (
"fmt"
"github.com/hashicorp/hcl2/gohcl"
"github.com/hashicorp/hcl2/hcl"
"github.com/hashicorp/hcl2/hcl/hclsyntax"
)
// ModuleCall represents a "module" block in a module or file.
type ModuleCall struct {
Name string
SourceAddr string
SourceAddrRange hcl.Range
SourceSet bool
Config hcl.Body
Version VersionConstraint
Count hcl.Expression
ForEach hcl.Expression
Providers []PassedProviderConfig
DependsOn []hcl.Traversal
DeclRange hcl.Range
}
func decodeModuleBlock(block *hcl.Block, override bool) (*ModuleCall, hcl.Diagnostics) {
mc := &ModuleCall{
Name: block.Labels[0],
DeclRange: block.DefRange,
}
schema := moduleBlockSchema
if override {
schema = schemaForOverrides(schema)
}
content, remain, diags := block.Body.PartialContent(schema)
mc.Config = remain
if !hclsyntax.ValidIdentifier(mc.Name) {
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Invalid module instance name",
Detail: badIdentifierDetail,
Subject: &block.LabelRanges[0],
})
}
if attr, exists := content.Attributes["source"]; exists {
valDiags := gohcl.DecodeExpression(attr.Expr, nil, &mc.SourceAddr)
diags = append(diags, valDiags...)
mc.SourceAddrRange = attr.Expr.Range()
mc.SourceSet = true
}
if attr, exists := content.Attributes["version"]; exists {
var versionDiags hcl.Diagnostics
mc.Version, versionDiags = decodeVersionConstraint(attr)
diags = append(diags, versionDiags...)
}
if attr, exists := content.Attributes["count"]; exists {
mc.Count = attr.Expr
// We currently parse this, but don't yet do anything with it.
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Reserved argument name in module block",
Detail: fmt.Sprintf("The name %q is reserved for use in a future version of Terraform.", attr.Name),
Subject: &attr.NameRange,
})
}
if attr, exists := content.Attributes["for_each"]; exists {
mc.ForEach = attr.Expr
// We currently parse this, but don't yet do anything with it.
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Reserved argument name in module block",
Detail: fmt.Sprintf("The name %q is reserved for use in a future version of Terraform.", attr.Name),
Subject: &attr.NameRange,
})
}
if attr, exists := content.Attributes["depends_on"]; exists {
deps, depsDiags := decodeDependsOn(attr)
diags = append(diags, depsDiags...)
mc.DependsOn = append(mc.DependsOn, deps...)
// We currently parse this, but don't yet do anything with it.
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Reserved argument name in module block",
Detail: fmt.Sprintf("The name %q is reserved for use in a future version of Terraform.", attr.Name),
Subject: &attr.NameRange,
})
}
if attr, exists := content.Attributes["providers"]; exists {
seen := make(map[string]hcl.Range)
pairs, pDiags := hcl.ExprMap(attr.Expr)
diags = append(diags, pDiags...)
for _, pair := range pairs {
key, keyDiags := decodeProviderConfigRef(pair.Key, "providers")
diags = append(diags, keyDiags...)
value, valueDiags := decodeProviderConfigRef(pair.Value, "providers")
diags = append(diags, valueDiags...)
if keyDiags.HasErrors() || valueDiags.HasErrors() {
continue
}
matchKey := key.String()
if prev, exists := seen[matchKey]; exists {
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Duplicate provider address",
Detail: fmt.Sprintf("A provider configuration was already passed to %s at %s. Each child provider configuration can be assigned only once.", matchKey, prev),
Subject: pair.Value.Range().Ptr(),
})
continue
}
rng := hcl.RangeBetween(pair.Key.Range(), pair.Value.Range())
seen[matchKey] = rng
mc.Providers = append(mc.Providers, PassedProviderConfig{
InChild: key,
InParent: value,
})
}
}
// Reserved block types (all of them)
for _, block := range content.Blocks {
diags = append(diags, &hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Reserved block type name in module block",
Detail: fmt.Sprintf("The block type name %q is reserved for use by Terraform in a future version.", block.Type),
Subject: &block.TypeRange,
})
}
return mc, diags
}
// PassedProviderConfig represents a provider config explicitly passed down to
// a child module, possibly giving it a new local address in the process.
type PassedProviderConfig struct {
InChild *ProviderConfigRef
InParent *ProviderConfigRef
}
var moduleBlockSchema = &hcl.BodySchema{
Attributes: []hcl.AttributeSchema{
{
Name: "source",
Required: true,
},
{
Name: "version",
},
{
Name: "count",
},
{
Name: "for_each",
},
{
Name: "depends_on",
},
{
Name: "providers",
},
},
Blocks: []hcl.BlockHeaderSchema{
// These are all reserved for future use.
{Type: "lifecycle"},
{Type: "locals"},
{Type: "provider", LabelNames: []string{"type"}},
},
}
|
