From 16b57adad325ea48513c24d531a2ca4f61a56edf Mon Sep 17 00:00:00 2001
From: Martin Atkins <mart@degeneration.co.uk>
Date: Sun, 8 May 2016 03:39:53 -0700
Subject: [PATCH] provider/null: null_data_source data source

A companion to the null_resource resource, this is here primarily to
enable manual quick testing of data sources workflows without depending
on any external services.

The "inputs" map gets copied to the computed "outputs" map on read,
"rand" gives a random number to exercise cases with constantly-changing
values (an anti-pattern!), and "has_computed_default" is settable in
config but computed if not set.
---
 builtin/providers/null/data_source.go | 54 +++++++++++++++++++++++++++
 builtin/providers/null/provider.go    |  4 ++
 2 files changed, 58 insertions(+)
 create mode 100644 builtin/providers/null/data_source.go

diff --git a/builtin/providers/null/data_source.go b/builtin/providers/null/data_source.go
new file mode 100644
index 000000000000..065029e7ea99
--- /dev/null
+++ b/builtin/providers/null/data_source.go
@@ -0,0 +1,54 @@
+package null
+
+import (
+	"fmt"
+	"math/rand"
+	"time"
+
+	"github.com/hashicorp/terraform/helper/schema"
+)
+
+func init() {
+	rand.Seed(time.Now().Unix())
+}
+
+func dataSource() *schema.Resource {
+	return &schema.Resource{
+		Read: dataSourceRead,
+
+		Schema: map[string]*schema.Schema{
+			"inputs": &schema.Schema{
+				Type:     schema.TypeMap,
+				Optional: true,
+			},
+			"outputs": &schema.Schema{
+				Type:     schema.TypeMap,
+				Computed: true,
+			},
+			"random": &schema.Schema{
+				Type:     schema.TypeString,
+				Computed: true,
+			},
+			"has_computed_default": &schema.Schema{
+				Type:     schema.TypeString,
+				Optional: true,
+				Computed: true,
+			},
+		},
+	}
+}
+
+func dataSourceRead(d *schema.ResourceData, meta interface{}) error {
+
+	inputs := d.Get("inputs")
+	d.Set("outputs", inputs)
+
+	d.Set("random", fmt.Sprintf("%d", rand.Int()))
+	if d.Get("has_computed_default") == "" {
+		d.Set("has_computed_default", "default")
+	}
+
+	d.SetId("static")
+
+	return nil
+}
diff --git a/builtin/providers/null/provider.go b/builtin/providers/null/provider.go
index 7e2a70c6cd10..7f67877fd026 100644
--- a/builtin/providers/null/provider.go
+++ b/builtin/providers/null/provider.go
@@ -13,5 +13,9 @@ func Provider() terraform.ResourceProvider {
 		ResourcesMap: map[string]*schema.Resource{
 			"null_resource": resource(),
 		},
+
+		DataSourcesMap: map[string]*schema.Resource{
+			"null_data_source": dataSource(),
+		},
 	}
 }