Added docs for SourceAMI and BuildRegion template

website/source/docs/builders/amazon-chroot.html.md

@@ -75,7 +75,11 @@ each category, the available configuration keys are alphabetized.
 ### Optional:
 
 -   `ami_description` (string) - The description to set for the
-    resulting AMI(s). By default this description is empty.
+    resulting AMI(s). By default this description is empty. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with name of the region where this
+    is built.
 
 -   `ami_groups` (array of strings) - A list of groups that have access to
     launch the resulting AMI(s). By default no groups have permission to launch
@@ -210,7 +214,11 @@ each category, the available configuration keys are alphabetized.
     validation of the `ami_regions` configuration option. Default `false`.
 
 -   `snapshot_tags` (object of key/value strings) - Tags to apply to snapshot.
-     They will override AMI tags if already applied to snapshot.
+    They will override AMI tags if already applied to snapshot. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with name of the region where this
+    is built.
 
 -   `snapshot_groups` (array of strings) - A list of groups that have access to
     create volumes from the snapshot(s). By default no groups have permission to create
@@ -250,7 +258,12 @@ each category, the available configuration keys are alphabetized.
     -   `most_recent` (bool) - Selects the newest created image when true.
          This is most useful for selecting a daily distro build.
 
--   `tags` (object of key/value strings) - Tags applied to the AMI.
+-   `tags` (object of key/value strings) - Tags applied to the AMI. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with name of the region where this
+    is built.
+
 
 ## Basic Example
 

website/source/docs/builders/amazon-ebs.html.md

@@ -105,7 +105,10 @@ builder.
         volumes
 
 -   `ami_description` (string) - The description to set for the
-    resulting AMI(s). By default this description is empty.
+    resulting AMI(s). By default this description is empty. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `ami_groups` (array of strings) - A list of groups that have access to
     launch the resulting AMI(s). By default no groups have permission to launch
@@ -182,11 +185,17 @@ builder.
 
 -   `run_tags` (object of key/value strings) - Tags to apply to the instance
     that is *launched* to create the AMI. These tags are *not* applied to the
-    resulting AMI unless they're duplicated in `tags`.
+    resulting AMI unless they're duplicated in `tags`. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `run_volume_tags` (object of key/value strings) - Tags to apply to the volumes
     that are *launched* to create the AMI. These tags are *not* applied to the
-    resulting AMI unless they're duplicated in `tags`.
+    resulting AMI unless they're duplicated in `tags`. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `security_group_id` (string) - The ID (*not* the name) of the security group
     to assign to the instance. By default this is not set and Packer will
@@ -214,7 +223,10 @@ builder.
     user creating the AMI has permissions to create volumes from the backing snapshot(s).
 
 -   `snapshot_tags` (object of key/value strings) - Tags to apply to snapshot.
-     They will override AMI tags if already applied to snapshot.
+     They will override AMI tags if already applied to snapshot. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `source_ami_filter` (object) - Filters used to populate the `source_ami` field.
     Example:
@@ -283,7 +295,10 @@ builder.
     required if you are using an non-default VPC.
 
 -   `tags` (object of key/value strings) - Tags applied to the AMI and
-    relevant snapshots.
+    relevant snapshots. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `temporary_key_pair_name` (string) - The name of the temporary keypair
     to generate. By default, Packer generates a name with a UUID.

website/source/docs/builders/amazon-ebsvolume.html.md

@@ -79,7 +79,10 @@ builder.
         volumes, `io1` for Provisioned IOPS (SSD) volumes, and `standard` for Magnetic
         volumes
     -   `tags` (map) - Tags to apply to the volume. These are retained after the
-        builder completes.
+        builder completes. This is a [configuration template]
+        (/docs/templates/configuration-templates.html) where the `SourceAMI`
+        variable is replaced with the source AMI ID and `BuildRegion` variable
+        is replaced with the value of `region`.
 
 -   `associate_public_ip_address` (boolean) - If using a non-default VPC, public
     IP addresses are not provided by default. If this is toggled, your new
@@ -102,7 +105,10 @@ builder.
 
 -   `run_tags` (object of key/value strings) - Tags to apply to the instance
     that is *launched* to create the AMI. These tags are *not* applied to the
-    resulting AMI unless they're duplicated in `tags`.
+    resulting AMI unless they're duplicated in `tags`. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `security_group_id` (string) - The ID (*not* the name) of the security group
     to assign to the instance. By default this is not set and Packer will

website/source/docs/builders/amazon-instance.html.md

@@ -127,7 +127,10 @@ builder.
         volumes
 
 -   `ami_description` (string) - The description to set for the
-    resulting AMI(s). By default this description is empty.
+    resulting AMI(s). By default this description is empty. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `ami_groups` (array of strings) - A list of groups that have access to
     launch the resulting AMI(s). By default no groups have permission to launch
@@ -198,7 +201,10 @@ builder.
 
 -   `run_tags` (object of key/value strings) - Tags to apply to the instance
     that is *launched* to create the AMI. These tags are *not* applied to the
-    resulting AMI unless they're duplicated in `tags`.
+    resulting AMI unless they're duplicated in `tags`. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `security_group_id` (string) - The ID (*not* the name) of the security group
     to assign to the instance. By default this is not set and Packer will
@@ -290,7 +296,10 @@ builder.
     `subnet-12345def`, where Packer will launch the EC2 instance. This field is
     required if you are using an non-default VPC.
 
--   `tags` (object of key/value strings) - Tags applied to the AMI.
+-   `tags` (object of key/value strings) - Tags applied to the AMI. This is a
+    [configuration template](/docs/templates/configuration-templates.html)
+    where the `SourceAMI` variable is replaced with the source AMI ID and
+    `BuildRegion` variable is replaced with the value of `region`.
 
 -   `temporary_key_pair_name` (string) - The name of the temporary key pair
     to generate. By default, Packer generates a name with an UUID.