83 lines
1.4 KiB
Go
83 lines
1.4 KiB
Go
package random
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import (
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"github.com/hashicorp/terraform/helper/schema"
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)
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func resourceShuffle() *schema.Resource {
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return &schema.Resource{
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Create: CreateShuffle,
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Read: schema.Noop,
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Delete: schema.RemoveFromState,
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Schema: map[string]*schema.Schema{
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"keepers": {
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Type: schema.TypeMap,
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Optional: true,
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ForceNew: true,
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},
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"seed": {
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Type: schema.TypeString,
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Optional: true,
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ForceNew: true,
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},
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"input": {
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Type: schema.TypeList,
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Required: true,
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ForceNew: true,
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Elem: &schema.Schema{
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Type: schema.TypeString,
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},
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},
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"result": {
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Type: schema.TypeList,
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Computed: true,
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Elem: &schema.Schema{
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Type: schema.TypeString,
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},
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},
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"result_count": {
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Type: schema.TypeInt,
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Optional: true,
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ForceNew: true,
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},
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},
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}
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}
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func CreateShuffle(d *schema.ResourceData, _ interface{}) error {
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input := d.Get("input").([]interface{})
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seed := d.Get("seed").(string)
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resultCount := d.Get("result_count").(int)
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if resultCount == 0 {
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resultCount = len(input)
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}
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result := make([]interface{}, 0, resultCount)
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rand := NewRand(seed)
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// Keep producing permutations until we fill our result
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Batches:
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for {
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perm := rand.Perm(len(input))
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for _, i := range perm {
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result = append(result, input[i])
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if len(result) >= resultCount {
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break Batches
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}
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}
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}
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d.SetId("-")
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d.Set("result", result)
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return nil
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}
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