2020-07-02 12:02:19 -04:00
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package hcl2template
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import (
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"context"
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"fmt"
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"github.com/hashicorp/hcl/v2"
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"github.com/hashicorp/hcl/v2/hcldec"
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"github.com/hashicorp/packer/packer"
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"github.com/zclconf/go-cty/cty"
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)
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2020-07-06 05:38:12 -04:00
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// HCL2Provisioner has a reference to the part of the HCL2 body where it is
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// defined, allowing to completely reconfigure the Provisioner right before
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// calling Provision: with contextual variables.
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// This permits using "${build.ID}" values for example.
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2020-07-02 12:02:19 -04:00
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type HCL2Provisioner struct {
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Provisioner packer.Provisioner
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provisionerBlock *ProvisionerBlock
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evalContext *hcl.EvalContext
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builderVariables map[string]string
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}
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func (p *HCL2Provisioner) ConfigSpec() hcldec.ObjectSpec {
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return p.Provisioner.ConfigSpec()
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}
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func (p *HCL2Provisioner) HCL2Prepare(buildVars map[string]interface{}) error {
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var diags hcl.Diagnostics
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ectx := p.evalContext
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if len(buildVars) > 0 {
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ectx = p.evalContext.NewChild()
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buildValues := map[string]cty.Value{}
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for k, v := range buildVars {
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switch v := v.(type) {
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case string:
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buildValues[k] = cty.StringVal(v)
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default:
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return fmt.Errorf("unhandled builvar type: %T", v)
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}
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}
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ectx.Variables = map[string]cty.Value{
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buildAccessor: cty.ObjectVal(buildValues),
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}
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}
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flatProvisionerCfg, moreDiags := decodeHCL2Spec(p.provisionerBlock.HCL2Ref.Rest, ectx, p.Provisioner)
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diags = append(diags, moreDiags...)
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if diags.HasErrors() {
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return diags
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}
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return p.Provisioner.Prepare(p.builderVariables, flatProvisionerCfg)
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}
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func (p *HCL2Provisioner) Prepare(args ...interface{}) error {
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return p.Provisioner.Prepare(args...)
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}
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func (p *HCL2Provisioner) Provision(ctx context.Context, ui packer.Ui, c packer.Communicator, vars map[string]interface{}) error {
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err := p.HCL2Prepare(vars)
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if err != nil {
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return err
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}
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return p.Provisioner.Provision(ctx, ui, c, vars)
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}
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