From d50472f52bb5b8d3e0a63f236b6714c26e7a1edf Mon Sep 17 00:00:00 2001
From: Tonis Tiigi <tonistiigi@gmail.com>
Date: Fri, 12 May 2017 17:12:10 -0700
Subject: [PATCH] =?UTF-8?q?docs:=20add=20docs=20for=20build=20=E2=80=94tar?=
 =?UTF-8?q?get?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
---
 docs/reference/commandline/build.md | 19 +++++++++++++++++++
 man/docker-build.1.md               |  4 ++++
 2 files changed, 23 insertions(+)

diff --git a/docs/reference/commandline/build.md b/docs/reference/commandline/build.md
index 57480dcd0f..9f587372c6 100644
--- a/docs/reference/commandline/build.md
+++ b/docs/reference/commandline/build.md
@@ -57,6 +57,7 @@ Options:
                                 or `g` (gigabytes). If you omit the unit, the system uses bytes.
       --squash                  Squash newly built layers into a single new layer (**Experimental Only**)
   -t, --tag value               Name and optionally a tag in the 'name:tag' format (default [])
+      --target string           Set the target build stage to build.
       --ulimit value            Ulimit options (default [])
 ```
 
@@ -454,6 +455,24 @@ more `--add-host` flags. This example adds a static address for a host named
 
     $ docker build --add-host=docker:10.180.0.1 .
 
+### Specifying target build stage (--target)
+
+When building a Dockerfile with multiple build stages, `--target` can be used to
+specify an intermediate build stage by name as a final stage for the resulting
+image. Commands after the target stage will be skipped.
+
+```Dockerfile
+FROM debian AS build-env
+...
+
+FROM alpine AS production-env
+...
+```
+
+```bash
+$ docker build -t mybuildimage --target build-env .
+```
+
 ### Squash an image's layers (--squash) **Experimental Only**
 
 #### Overview
diff --git a/man/docker-build.1.md b/man/docker-build.1.md
index 59eba003a0..1fe51811a3 100644
--- a/man/docker-build.1.md
+++ b/man/docker-build.1.md
@@ -31,6 +31,7 @@ docker-build - Build an image from a Dockerfile
 [**--cpu-quota**[=*0*]]
 [**--cpuset-cpus**[=*CPUSET-CPUS*]]
 [**--cpuset-mems**[=*CPUSET-MEMS*]]
+[**--target**[=*[]*]]
 [**--ulimit**[=*[]*]]
 PATH | URL | -
 
@@ -233,6 +234,9 @@ two memory nodes.
   If the path is not absolute, the path is considered relative to the `cgroups` path of the init process.
 Cgroups are created if they do not already exist.
 
+**--target**=""
+   Set the target build stage name.
+
 **--ulimit**=[]
   Ulimit options