databricks-cli/bundle/config/mutator/set_variables.go

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package mutator
import (
"context"
"github.com/databricks/cli/bundle"
"github.com/databricks/cli/bundle/config/variable"
"github.com/databricks/cli/libs/diag"
"github.com/databricks/cli/libs/env"
)
const bundleVarPrefix = "BUNDLE_VAR_"
type setVariables struct{}
func SetVariables() bundle.Mutator {
return &setVariables{}
}
func (m *setVariables) Name() string {
return "SetVariables"
}
func setVariable(ctx context.Context, v *variable.Variable, name string) diag.Diagnostics {
// case: variable already has value initialized, so skip
if v.HasValue() {
return nil
}
// case: read and set variable value from process environment
envVarName := bundleVarPrefix + name
if val, ok := env.Lookup(ctx, envVarName); ok {
if v.IsComplex() {
return diag.Errorf(`setting via environment variables (%s) is not supported for complex variable %s`, envVarName, name)
}
err := v.Set(val)
if err != nil {
return diag.Errorf(`failed to assign value "%s" to variable %s from environment variable %s with error: %v`, val, name, envVarName, err)
}
return nil
}
// case: Defined a variable for named lookup for a resource
// It will be resolved later in ResolveResourceReferences mutator
if v.Lookup != nil {
return nil
}
// case: Set the variable to its default value
if v.HasDefault() {
err := v.Set(v.Default)
if err != nil {
return diag.Errorf(`failed to assign default value from config "%s" to variable %s with error: %v`, v.Default, name, err)
}
return nil
}
// We should have had a value to set for the variable at this point.
return diag.Errorf(`no value assigned to required variable %s. Assignment can be done through the "--var" flag or by setting the %s environment variable`, name, bundleVarPrefix+name)
}
func (m *setVariables) Apply(ctx context.Context, b *bundle.Bundle) diag.Diagnostics {
var diags diag.Diagnostics
for name, variable := range b.Config.Variables {
diags = diags.Extend(setVariable(ctx, variable, name))
if diags.HasError() {
return diags
}
}
return diags
}