add workflow with triplet (#13)

.github/workflows/hosted-ninja-vcpkg_submod-triplet.yml

@@ -0,0 +1,66 @@
+# Copyright (c) 2019-2020-2021 Luca Cappa
+# Released under the term specified in file LICENSE.txt
+# SPDX short identifier: MIT
+#
+# The peculiarity of this workflow is that assumes vcpkg stored as a submodule of this repository.
+# This workflow does the following:
+# - Restores vcpkg artifacts from cache.
+# - Sets up vcpkg if needed, then run CMake with CMakePreset.json using a configuration
+#   that leverages the vcpkg's toolchain file. This will automatically run vcpkg to install dependencies
+#   described by the vcpkg.json manifest file. It will be a no-op if those are restored from cache.
+# - Finally builds the sources with Ninja.
+name: hosted-ninja-vcpkg_submod-triplet-autocache
+on: [push, workflow_dispatch]
+
+jobs:
+  job:
+    name: ${{ matrix.os }}-${{ github.workflow }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+        include:
+          - os: windows-latest
+            triplet: x64-windows
+          - os: ubuntu-latest
+            triplet: x64-linux
+          - os: macos-latest
+            triplet: x64-osx
+
+    env:
+      VCPKG_DEFAULT_TRIPLET: ${{ matrix.triplet }}
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: true
+
+      - uses: lukka/get-cmake@latest
+      - name: dir
+        run: find $RUNNER_WORKSPACE
+        shell: bash
+
+      - name: Restore artifacts, or setup vcpkg for building artifacts
+        uses: lukka/run-vcpkg@v10
+        id: runvcpkg
+        with:
+          # This one is not needed, as it is the default value anyway.
+          # vcpkgDirectory: '${{ github.workspace }}/vcpkg'
+          vcpkgJsonGlob: '**/cmakepresets/vcpkg.json'
+
+      - name: List $RUNNER_WORKSPACE before build
+        run: find $RUNNER_WORKSPACE
+        shell: bash
+      - name: Prints output of run-vcpkg's action.
+        run: echo "root='${{ steps.runvcpkg.outputs.RUNVCPKG_VCPKG_ROOT_OUT }}', triplet='${{ steps.runvcpkg.outputs.RUNVCPKG_VCPKG_DEFAULT_TRIPLET_OUT }}' "
+      - name: Run CMake+vcpkg+Ninja
+        uses: lukka/run-cmake@v10
+        id: runcmake
+        with:
+          cmakeListsTxtPath: '${{ github.workspace }}/cmakepresets/CMakeLists.txt'
+          configurePreset: 'ninja-multi-vcpkg'
+          buildPreset: 'ninja-multi-vcpkg'
+      - name: List $RUNNER_WORKSPACE after build
+        run: find $RUNNER_WORKSPACE
+        shell: bash

cmakepresets/CMakeLists.txt

@@ -1,11 +1,22 @@
 # CMakeLists.txt
+
+# Ensure to pick up the default triplet from the environment if any. This helps 
+# driving the vcpkg triplet in the same way either when starting vcpkg directly,
+# or when letting CMake start vcpkg at configure/generate time.
+# Note: this logic must happen before PROJECT command.
+if(DEFINED ENV{VCPKG_DEFAULT_TRIPLET} AND NOT DEFINED VCPKG_TARGET_TRIPLET)
+  set(VCPKG_TARGET_TRIPLET "$ENV{VCPKG_DEFAULT_TRIPLET}" CACHE STRING "The vcpkg triplet")
+endif()
+
 cmake_minimum_required(VERSION 3.0)
 project(test)
 
+
 find_package(unofficial-sqlite3 CONFIG REQUIRED)
 find_package(fmt CONFIG REQUIRED)
 
 add_executable(main)
 target_sources(main PRIVATE test.cpp)
 target_link_libraries(main PRIVATE unofficial::sqlite3::sqlite3 fmt::fmt)
 set_property(TARGET main PROPERTY CXX_STANDARD 20)
+