Merge pull request #19226 from hashicorp/jbardin/no-diff

prefer prior state when there is no plan diff
This commit is contained in:
James Bardin 2018-10-30 17:10:31 -04:00 committed by GitHub
commit 6383ffc2aa
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4 changed files with 115 additions and 5 deletions

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@ -21,6 +21,7 @@ func Provider() terraform.ResourceProvider {
"test_resource_gh12183": testResourceGH12183(),
"test_resource_with_custom_diff": testResourceCustomDiff(),
"test_resource_timeout": testResourceTimeout(),
"test_resource_diff_suppress": testResourceDiffSuppress(),
},
DataSourcesMap: map[string]*schema.Resource{
"test_data_source": testDataSource(),

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@ -0,0 +1,57 @@
package test
import (
"strings"
"github.com/hashicorp/terraform/helper/schema"
)
func testResourceDiffSuppress() *schema.Resource {
return &schema.Resource{
Create: testResourceDiffSuppressCreate,
Read: testResourceDiffSuppressRead,
Update: testResourceDiffSuppressUpdate,
Delete: testResourceDiffSuppressDelete,
Importer: &schema.ResourceImporter{
State: schema.ImportStatePassthrough,
},
Schema: map[string]*schema.Schema{
"val_to_upper": {
Type: schema.TypeString,
Required: true,
ForceNew: true,
StateFunc: func(val interface{}) string {
return strings.ToUpper(val.(string))
},
DiffSuppressFunc: func(k, old, new string, d *schema.ResourceData) bool {
return strings.ToUpper(old) == strings.ToUpper(new)
},
},
"optional": {
Type: schema.TypeString,
Optional: true,
},
},
}
}
func testResourceDiffSuppressCreate(d *schema.ResourceData, meta interface{}) error {
d.SetId("testId")
return testResourceRead(d, meta)
}
func testResourceDiffSuppressRead(d *schema.ResourceData, meta interface{}) error {
return nil
}
func testResourceDiffSuppressUpdate(d *schema.ResourceData, meta interface{}) error {
return nil
}
func testResourceDiffSuppressDelete(d *schema.ResourceData, meta interface{}) error {
d.SetId("")
return nil
}

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@ -0,0 +1,47 @@
package test
import (
"strings"
"testing"
"github.com/hashicorp/terraform/helper/resource"
)
func TestResourceDiffSuppress_create(t *testing.T) {
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
CheckDestroy: testAccCheckResourceDestroy,
Steps: []resource.TestStep{
resource.TestStep{
Config: strings.TrimSpace(`
resource "test_resource_diff_suppress" "foo" {
val_to_upper = "foo"
}
`),
},
},
})
}
func TestResourceDiffSuppress_update(t *testing.T) {
resource.UnitTest(t, resource.TestCase{
Providers: testAccProviders,
CheckDestroy: testAccCheckResourceDestroy,
Steps: []resource.TestStep{
resource.TestStep{
Config: strings.TrimSpace(`
resource "test_resource_diff_suppress" "foo" {
val_to_upper = "foo"
}
`),
},
resource.TestStep{
Config: strings.TrimSpace(`
resource "test_resource_diff_suppress" "foo" {
val_to_upper = "bar"
optional = "more"
}
`),
},
},
})
}

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@ -476,11 +476,16 @@ func (s *GRPCProviderServer) PlanResourceChange(_ context.Context, req *proto.Pl
}
if diff == nil {
// schema.Provider.Diff returns nil if it ends up making a diff with
// no changes, but our new interface wants us to return an actual
// change description that _shows_ there are no changes, so we return
// the proposed change that produces no diff.
// schema.Provider.Diff returns nil if it ends up making a diff with no
// changes, but our new interface wants us to return an actual change
// description that _shows_ there are no changes. This is usually the
// PriorSate, however if there was no prior state and no diff, then we
// use the ProposedNewState.
if !priorStateVal.IsNull() {
resp.PlannedState = req.PriorState
} else {
resp.PlannedState = req.ProposedNewState
}
return resp, nil
}