Create buildx image

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

.github/workflows/build.yml

@@ -12,6 +12,7 @@ on:
       - 'master'
 
 env:
+  REPO_SLUG: "docker/buildx-bin"
   REPO_SLUG_ORIGIN: "moby/buildkit:master"
   CACHEKEY_BINARIES: "binaries"
   PLATFORMS: "linux/amd64,linux/arm/v6,linux/arm/v7,linux/arm64,linux/s390x,linux/ppc64le,linux/riscv64"
@@ -173,6 +174,38 @@ jobs:
           name: buildx
           path: ./release-out/*
           if-no-files-found: error
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+      -
+        name: Docker meta
+        id: meta
+        uses: docker/metadata-action@v3
+        with:
+          images: |
+            ${{ env.REPO_SLUG }}
+          tags: |
+            type=ref,event=branch
+            type=ref,event=pr
+            type=semver,pattern={{version}}
+      -
+        name: Login to DockerHub
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      -
+        name: Build and push image
+        uses: docker/build-push-action@v2
+        with:
+          context: .
+          target: binaries
+          push: ${{ github.event_name != 'pull_request' }}
+          cache-from: type=local,src=/tmp/.buildx-cache/${{ env.CACHEKEY_BINARIES }}
+          platforms: ${{ env.PLATFORMS }},darwin/amd64,darwin/arm64,windows/amd64,windows/arm64
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}
       -
         name: GitHub Release
         if: startsWith(github.ref, 'refs/tags/v')

README.md

@@ -20,25 +20,28 @@ Key features:
 # Table of Contents
 
 - [Installing](#installing)
+  - [Docker](#docker)
+  - [Binary release](#binary-release)
+  - [From `Dockerfile`](#from-dockerfile)
 - [Building](#building)
-    + [with Docker 18.09+](#with-docker-1809)
-    + [with buildx or Docker 19.03](#with-buildx-or-docker-1903)
+  - [with Docker 18.09+](#with-docker-1809)
+  - [with buildx or Docker 19.03](#with-buildx-or-docker-1903)
 - [Getting started](#getting-started)
-  * [Building with buildx](#building-with-buildx)
-  * [Working with builder instances](#working-with-builder-instances)
-  * [Building multi-platform images](#building-multi-platform-images)
-  * [High-level build options](#high-level-build-options)
-- [Documentation](#documentation)
-    + [`buildx build [OPTIONS] PATH | URL | -`](docs/reference/buildx_build.md)
-    + [`buildx create [OPTIONS] [CONTEXT|ENDPOINT]`](docs/reference/buildx_create.md)
-    + [`buildx use NAME`](docs/reference/buildx_use.md)
-    + [`buildx inspect [NAME]`](docs/reference/buildx_inspect.md)
-    + [`buildx ls`](docs/reference/buildx_ls.md)
-    + [`buildx stop [NAME]`](docs/reference/buildx_stop.md)
-    + [`buildx rm [NAME]`](docs/reference/buildx_rm.md)
-    + [`buildx bake [OPTIONS] [TARGET...]`](docs/reference/buildx_bake.md)
-    + [`buildx imagetools create [OPTIONS] [SOURCE] [SOURCE...]`](docs/reference/buildx_imagetools_create.md)
-    + [`buildx imagetools inspect NAME`](docs/reference/buildx_imagetools_inspect.md)
+  - [Building with buildx](#building-with-buildx)
+  - [Working with builder instances](#working-with-builder-instances)
+  - [Building multi-platform images](#building-multi-platform-images)
+  - [High-level build options](#high-level-build-options)
+- [Documentation](docs/reference)
+  - [`buildx build [OPTIONS] PATH | URL | -`](docs/reference/buildx_build.md)
+  - [`buildx create [OPTIONS] [CONTEXT|ENDPOINT]`](docs/reference/buildx_create.md)
+  - [`buildx use NAME`](docs/reference/buildx_use.md)
+  - [`buildx inspect [NAME]`](docs/reference/buildx_inspect.md)
+  - [`buildx ls`](docs/reference/buildx_ls.md)
+  - [`buildx stop [NAME]`](docs/reference/buildx_stop.md)
+  - [`buildx rm [NAME]`](docs/reference/buildx_rm.md)
+  - [`buildx bake [OPTIONS] [TARGET...]`](docs/reference/buildx_bake.md)
+  - [`buildx imagetools create [OPTIONS] [SOURCE] [SOURCE...]`](docs/reference/buildx_imagetools_create.md)
+  - [`buildx imagetools inspect NAME`](docs/reference/buildx_imagetools_inspect.md)
 - [Setting buildx as default builder in Docker 19.03+](#setting-buildx-as-default-builder-in-docker-1903)
 - [Contributing](#contributing)
 
@@ -60,6 +63,17 @@ Change the permission to execute:
 chmod a+x ~/.docker/cli-plugins/docker-buildx
 ```
 
+### From `Dockerfile`
+
+Here is how to use buildx inside a Dockerfile through the [`docker/buildx-bin`](https://hub.docker.com/r/docker/buildx-bin) image:
+
+```Dockerfile
+FROM docker
+COPY --from=docker/buildx-bin:latest /buildx /usr/libexec/docker/cli-plugins/docker-buildx
+RUN docker buildx version
+```
+
+
 # Building