85 lines
3.0 KiB
Go
85 lines
3.0 KiB
Go
package backend
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import (
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"fmt"
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"github.com/hashicorp/hcl2/hcl"
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"github.com/hashicorp/terraform/configs"
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"github.com/hashicorp/terraform/terraform"
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"github.com/hashicorp/terraform/tfdiags"
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)
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// UnparsedVariableValue represents a variable value provided by the caller
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// whose parsing must be deferred until configuration is available.
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//
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// This exists to allow processing of variable-setting arguments (e.g. in the
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// command package) to be separated from parsing (in the backend package).
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type UnparsedVariableValue interface {
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// ParseVariableValue information in the provided variable configuration
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// to parse (if necessary) and return the variable value encapsulated in
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// the receiver.
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//
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// If error diagnostics are returned, the resulting value may be invalid
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// or incomplete.
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ParseVariableValue(mode configs.VariableParsingMode) (*terraform.InputValue, tfdiags.Diagnostics)
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}
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func ParseVariableValues(vv map[string]UnparsedVariableValue, decls map[string]*configs.Variable) (terraform.InputValues, tfdiags.Diagnostics) {
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var diags tfdiags.Diagnostics
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ret := make(terraform.InputValues, len(vv))
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for name, rv := range vv {
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var mode configs.VariableParsingMode
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config, declared := decls[name]
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if declared {
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mode = config.ParsingMode
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} else {
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mode = configs.VariableParseLiteral
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}
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val, valDiags := rv.ParseVariableValue(mode)
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diags = diags.Append(valDiags)
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if valDiags.HasErrors() {
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continue
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}
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if !declared {
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switch val.SourceType {
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case terraform.ValueFromConfig, terraform.ValueFromFile:
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// These source types have source ranges, so we can produce
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// a nice error message with good context.
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diags = diags.Append(&hcl.Diagnostic{
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Severity: hcl.DiagError,
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Summary: "Value for undeclared variable",
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Detail: fmt.Sprintf("The root module does not declare a variable named %q. To use this value, add a \"variable\" block to the configuration.", name),
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Subject: val.SourceRange.ToHCL().Ptr(),
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})
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case terraform.ValueFromEnvVar:
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// We allow and ignore undeclared names for environment
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// variables, because users will often set these globally
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// when they are used across many (but not necessarily all)
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// configurations.
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case terraform.ValueFromCLIArg:
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diags = diags.Append(tfdiags.Sourceless(
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tfdiags.Error,
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"Value for undeclared variable",
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fmt.Sprintf("A variable named %q was assigned on the command line, but the root module does not declare a variable of that name. To use this value, add a \"variable\" block to the configuration.", name),
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))
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default:
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// For all other source types we are more vague, but other situations
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// don't generally crop up at this layer in practice.
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diags = diags.Append(tfdiags.Sourceless(
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tfdiags.Error,
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"Value for undeclared variable",
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fmt.Sprintf("A variable named %q was assigned a value, but the root module does not declare a variable of that name. To use this value, add a \"variable\" block to the configuration.", name),
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))
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}
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continue
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}
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ret[name] = val
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}
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return ret, diags
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}
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