ci: add github action

.github/workflows/book.yml

@@ -0,0 +1,35 @@
+name: Book
+
+on:
+  push:
+    branches: [ master ]
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build the book
+    runs-on: ubuntu-latest
+  setep:
+    - name: Prepare
+      run: sudo apt install po4a python3-polib libxml2 xsltproc docbook-xml docbook-xsl tidy fop gettext subversion
+    - name: Checkout
+      uses: actions/checkout@v2
+      with:
+        fetch-depth: 0
+    - name: English Book SVN Checkout
+      run: svn co http://svn.linuxfromscratch.org/lfs/trunk/BOOK $HOME/lfs-en
+    - name: Update po Files
+      run: make MLANG=zh_CN pofiles LFS_EN=$HOME/lfs-en
+    - name: Generate Translated XML Files:
+      run: make MLANG=zh_CN booksrc MLANG=zh_CN
+    - name: Generate Translated Book (sysv):
+      run: make MLANG=zh_CN REV=sysv BASEDIR=$HOME/lfs-sysv html nochunks pdf
+    - name: Generate Translated Book (systemd):
+      run: make MLANG=zh_CN REV=systemd BASRDIR=$HOME/lfs-systemd html nochunks pdf
+    - name: Upload Artifacts
+      uses: actions/upload-artifact@v2
+      with:
+        name: book
+        path: |
+          $HOME/lfs-sysv 
+          $HOME/lfs-systemd