ansible-local/ansible: Add extra-vars packer_*

Added:
- `packer_build_name`
- `packer_builder_type`
- `packer_http_addr` - `ansible-local` only

Closes: #4820

provisioner/ansible-local/provisioner.go

@@ -294,9 +294,10 @@ func (p *Provisioner) executeAnsible(ui packer.Ui, comm packer.Communicator) err
 	playbook := filepath.ToSlash(filepath.Join(p.config.StagingDir, filepath.Base(p.config.PlaybookFile)))
 	inventory := filepath.ToSlash(filepath.Join(p.config.StagingDir, filepath.Base(p.config.InventoryFile)))
 
-	extraArgs := ""
+	extraArgs := fmt.Sprintf(" --extra-vars \"packer_build_name=%s packer_builder_type=%s packer_http_addr=%s\" ",
+		p.config.PackerBuildName, p.config.PackerBuilderType, common.GetHTTPAddr())
 	if len(p.config.ExtraArguments) > 0 {
-		extraArgs = " " + strings.Join(p.config.ExtraArguments, " ")
+		extraArgs = extraArgs + strings.Join(p.config.ExtraArguments, " ")
 	}
 
 	// Fetch external dependencies

provisioner/ansible/provisioner.go

@@ -305,7 +305,9 @@ func (p *Provisioner) executeAnsible(ui packer.Ui, comm packer.Communicator, pri
 	inventory := p.config.inventoryFile
 	var envvars []string
 
-	args := []string{playbook, "-i", inventory}
+	args := []string{"--extra-vars", fmt.Sprintf("packer_build_name=%s packer_builder_type=%s",
+		p.config.PackerBuildName, p.config.PackerBuilderType),
+		"-i", inventory, playbook}
 	if len(privKeyFile) > 0 {
 		args = append(args, "--private-key", privKeyFile)
 	}
@@ -354,7 +356,7 @@ func (p *Provisioner) executeAnsible(ui packer.Ui, comm packer.Communicator, pri
 	go repeat(stdout)
 	go repeat(stderr)
 
-	log.Printf("Executing Ansible: %s", strings.Join(cmd.Args, " "))
+	ui.Say(fmt.Sprintf("Executing Ansible: %s", strings.Join(cmd.Args, " ")))
 	if err := cmd.Start(); err != nil {
 		return err
 	}

website/source/docs/provisioners/ansible-local.html.md

@@ -136,3 +136,24 @@ chi-appservers
     able to create directories and write into this folder. If the permissions
     are not correct, use a shell provisioner prior to this to configure it
     properly.
+
+## Default Extra Variables
+
+In addition to being able to specify extra arguments using the
+`extra_arguments` configuration, the provisioner automatically defines certain
+commonly useful Ansible variables:
+
+- `packer_build_name` is set to the name of the build that Packer is running.
+    This is most useful when Packer is making multiple builds and you want to
+    distinguish them slightly when using a common playbook.
+
+- `packer_builder_type` is the type of the builder that was used to create the
+    machine that the script is running on. This is useful if you want to run
+    only certain parts of the playbook on systems built with certain builders.
+
+- `packer_http_addr` If using a builder that provides an http server for file
+    transfer (such as hyperv, parallels, qemu, virtualbox, and vmware), this
+    will be set to the address. You can use this address in your provisioner to
+    download large files over http. This may be useful if you're experiencing
+    slower speeds using the default file provisioner. A file provisioner using
+    the `winrm` communicator may experience these types of difficulties.

website/source/docs/provisioners/ansible.html.md

@@ -113,6 +113,22 @@ Optional Parameters:
 - `user` (string) - The `ansible_user` to use. Defaults to the user running
   packer.
 
+
+## Default Extra Variables
+
+In addition to being able to specify extra arguments using the
+`extra_arguments` configuration, the provisioner automatically defines certain
+commonly useful Ansible variables:
+
+- `packer_build_name` is set to the name of the build that Packer is running.
+    This is most useful when Packer is making multiple builds and you want to
+    distinguish them slightly when using a common playbook.
+
+- `packer_builder_type` is the type of the builder that was used to create the
+    machine that the script is running on. This is useful if you want to run
+    only certain parts of the playbook on systems built with certain builders.
+
+
 ## Limitations
 
 ### Redhat / CentOS