73 lines
2.4 KiB
Go
73 lines
2.4 KiB
Go
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package customdiff
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import (
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"github.com/hashicorp/go-multierror"
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"github.com/hashicorp/terraform/helper/schema"
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)
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// All returns a CustomizeDiffFunc that runs all of the given
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// CustomizeDiffFuncs and returns all of the errors produced.
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//
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// If one function produces an error, functions after it are still run.
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// If this is not desirable, use function Sequence instead.
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//
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// If multiple functions returns errors, the result is a multierror.
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//
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// For example:
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//
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// &schema.Resource{
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// // ...
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// CustomizeDiff: customdiff.All(
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// customdiff.ValidateChange("size", func (old, new, meta interface{}) error {
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// // If we are increasing "size" then the new value must be
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// // a multiple of the old value.
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// if new.(int) <= old.(int) {
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// return nil
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// }
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// if (new.(int) % old.(int)) != 0 {
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// return fmt.Errorf("new size value must be an integer multiple of old value %d", old.(int))
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// }
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// return nil
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// }),
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// customdiff.ForceNewIfChange("size", func (old, new, meta interface{}) bool {
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// // "size" can only increase in-place, so we must create a new resource
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// // if it is decreased.
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// return new.(int) < old.(int)
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// }),
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// customdiff.ComputedIf("version_id", func (d *schema.ResourceDiff, meta interface{}) bool {
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// // Any change to "content" causes a new "version_id" to be allocated.
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// return d.HasChange("content")
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// }),
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// ),
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// }
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//
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func All(funcs ...schema.CustomizeDiffFunc) schema.CustomizeDiffFunc {
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return func(d *schema.ResourceDiff, meta interface{}) error {
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var err error
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for _, f := range funcs {
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thisErr := f(d, meta)
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if thisErr != nil {
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err = multierror.Append(err, thisErr)
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}
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}
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return err
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}
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}
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// Sequence returns a CustomizeDiffFunc that runs all of the given
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// CustomizeDiffFuncs in sequence, stopping at the first one that returns
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// an error and returning that error.
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//
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// If all functions succeed, the combined function also succeeds.
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func Sequence(funcs ...schema.CustomizeDiffFunc) schema.CustomizeDiffFunc {
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return func(d *schema.ResourceDiff, meta interface{}) error {
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for _, f := range funcs {
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err := f(d, meta)
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if err != nil {
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return err
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}
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}
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return nil
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}
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}
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