Add simple Github workflow

.github/workflows/ubuntu.yml

@@ -0,0 +1,50 @@
+name: Ubuntu Workflow
+
+on:
+  pull_request:
+    branches: [ master-with-README ]
+  push:
+  # manual run in actions tab - for all branches
+  workflow_dispatch:
+
+jobs:
+  build:
+    name: Build, test and provide nightly
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+        include:
+          - os: ubuntu-latest
+            skip_test: true
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      # Checks-out your repository under $GITHUB_WORKSPACE, so your job can access it
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Install packages
+        run: |
+          sudo apt-get update
+          sudo apt-get install texlive texlive-latex-extra texlive-plain-generic
+
+      - name: Set git user
+        run: |
+          git config --global user.name github-actions
+          git config --global user.email github-actions-bot@users.noreply.github.com
+
+      - name: Generate PDFs
+        run: |
+          cd guide
+          make pdf
+
+      - name: Upload all pdfs
+        uses: actions/upload-artifact@v3.1.0
+        with:
+          name: gnucobol-docs-all-pdfs
+          path: guide/PDFs/*.pdf
+          if-no-files-found: error
+          retention-days: 0

guide/Makefile

@@ -125,23 +125,23 @@ info-clean:
 	@rm -rvf info/gnucob*.info
 
 
-publish: HTML/gnucobpg.html $(CSS)
+publish:: HTML/gnucobpg.html $(CSS)
 	test "$(WWW)"
 	scp HTML/gnucobpg.html $(WWW)
 	scp css/gnucobpg.css   $(WWW)/css/
 	scp js/tree.js         $(WWW)/js/
 
-publish-css: HTML/gnucobpg.html $(CSS)
+publish-css:: HTML/gnucobpg.html $(CSS)
 	test "$(WWW)"
 	scp css/gnucobpg.css    $(WWW)/css/
 	scp js/tree.js          $(WWW)/js/
 
-publish-css: HTML/gnucobpr.html $(CSS)
+publish-css:: HTML/gnucobpr.html $(CSS)
 	test "$(WWW)"
 	scp css/gnucobpr.css    $(WWW)/css/
 	scp js/tree.js          $(WWW)/js/
 
-publish: HTML/gnucobpr.html $(CSS)
+publish:: HTML/gnucobpr.html $(CSS)
 	test "$(WWW)"
 	scp HTML/gnucobpr.html $(WWW)
 	scp css/gnucobpr.css   $(WWW)/css/