document HTTPConfig from struct

common/http_config.go

@@ -1,3 +1,5 @@
+//go:generate struct-markdown
+
 package common
 
 import (
@@ -6,11 +8,29 @@ import (
 	"github.com/hashicorp/packer/template/interpolate"
 )
 
-// HTTPConfig contains configuration for the local HTTP Server
+// Packer will create an http server serving `http_directory` when it is set, a
+// random free port will be selected and the architecture of the directory
+// referenced will be available in your builder.
+//
+// Example usage from a builder:
+//
+//   `wget http://{{ .HTTPIP }}:{{ .HTTPPort }}/foo/bar/preseed.cfg`
 type HTTPConfig struct {
-	HTTPDir     string `mapstructure:"http_directory"`
-	HTTPPortMin int    `mapstructure:"http_port_min"`
-	HTTPPortMax int    `mapstructure:"http_port_max"`
+	// Path to a directory to serve using an HTTP server. The files in this
+	// directory will be available over HTTP that will be requestable from the
+	// virtual machine. This is useful for hosting kickstart files and so on.
+	// By default this is an empty string, which means no HTTP server will be
+	// started. The address and port of the HTTP server will be available as
+	// variables in `boot_command`. This is covered in more detail below.
+	HTTPDir string `mapstructure:"http_directory"`
+	// These are the minimum and maximum port to use for the HTTP server
+	// started to serve the `http_directory`. Because Packer often runs in
+	// parallel, Packer will choose a randomly available port in this range to
+	// run the HTTP server. If you want to force the HTTP server to be on one
+	// port, make this minimum and maximum port the same. By default the values
+	// are `8000` and `9000`, respectively.
+	HTTPPortMin int `mapstructure:"http_port_min"`
+	HTTPPortMax int `mapstructure:"http_port_max"`
 }
 
 func (c *HTTPConfig) Prepare(ctx *interpolate.Context) []error {

website/source/docs/builders/qemu.html.md.erb

@@ -90,7 +90,14 @@ Linux server and have not enabled X11 forwarding (`ssh -X`).
 
 <%= partial "partials/common/ISOConfig-not-required" %>
 
-## Specific Configuration Reference
+## Http directory configuration reference
+
+<%= partial "partials/common/HTTPConfig" %>
+### Optional:
+
+<%= partial "partials/common/HTTPConfig-not-required" %>
+
+## Qemu Configuration Reference
 
 ### Optional:
 <%= partial "partials/builder/qemu/Config-not-required" %>
@@ -129,20 +136,6 @@ DADA
     listed files must not exceed 1.44 MB. The supported ways to move large
     files into the OS are using `http_directory` or [the file provisioner](https://www.packer.io/docs/provisioners/file.html).
 
--   `http_directory` (string) - Path to a directory to serve using an
-    HTTP server. The files in this directory will be available over HTTP that
-    will be requestable from the virtual machine. This is useful for hosting
-    kickstart files and so on. By default this is an empty string, which means
-    no HTTP server will be started. The address and port of the HTTP server will
-    be available as variables in `boot_command`. This is covered in more detail
-    below.
-
--   `http_port_min` and `http_port_max` (number) - These are the minimum and
-    maximum port to use for the HTTP server started to serve the
-    `http_directory`. Because Packer often runs in parallel, Packer will choose
-    a randomly available port in this range to run the HTTP server. If you want
-    to force the HTTP server to be on one port, make this minimum and maximum
-    port the same. By default the values are `8000` and `9000`, respectively.
 
 ## Boot Command
 

website/source/partials/common/_HTTPConfig-not-required.html.md

@@ -0,0 +1,17 @@
+<!-- Code generated from the comments of the HTTPConfig struct in common/http_config.go; DO NOT EDIT MANUALLY -->
+
+-   `http_directory` (string) - Path to a directory to serve using an HTTP server. The files in this
+    directory will be available over HTTP that will be requestable from the
+    virtual machine. This is useful for hosting kickstart files and so on.
+    By default this is an empty string, which means no HTTP server will be
+    started. The address and port of the HTTP server will be available as
+    variables in `boot_command`. This is covered in more detail below.
+    
+-   `http_port_min` (int) - These are the minimum and maximum port to use for the HTTP server
+    started to serve the `http_directory`. Because Packer often runs in
+    parallel, Packer will choose a randomly available port in this range to
+    run the HTTP server. If you want to force the HTTP server to be on one
+    port, make this minimum and maximum port the same. By default the values
+    are `8000` and `9000`, respectively.
+    
+-   `http_port_max` (int) - HTTP Port Max

website/source/partials/common/_HTTPConfig.html.md

@@ -0,0 +1,8 @@
+<!-- Code generated from the comments of the HTTPConfig struct in common/http_config.go; DO NOT EDIT MANUALLY -->
+Packer will create an http server serving `http_directory` when it is set, a
+random free port will be selected and the architecture of the directory
+referenced will be available in your builder.
+
+Example usage from a builder:
+
+  `wget http://{{ .HTTPIP }}:{{ .HTTPPort }}/foo/bar/preseed.cfg`