Update CPM.cmake and cache dependencies in workflows (#70)

* update CPM.cmake to 0.28.0

* cache CPM.cmake dependencies

* create modules directory if it doesn't exist on windows

* experiment with env variable

* experiment 2

* experiment 3

* use env for all workflows

* make cache keys OS dependent

* replace env.GITHUB_ with github.workspace

* format workflow files

* update cache key

* use unique key for each workflow

.github/workflows/documentation.yaml

@@ -3,7 +3,7 @@ name: Documentation
 on:
   push:
     tags:
-      - '*'
+      - "*"
 
 jobs:
   build:
@@ -12,14 +12,21 @@ jobs:
     steps:
       - uses: actions/checkout@v1
 
+      - uses: actions/cache@v2
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.action }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
       - name: Install dependencies
         run: |
           brew install doxygen
           pip3 install jinja2 Pygments
 
       - name: Build
+        env:
+          CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
         run: |
-          cmake -Hdocumentation -Bbuild
+          cmake -Sdocumentation -Bbuild
           cmake --build build --target GenerateDocs
 
       - name: Publish

.github/workflows/install.yml

@@ -13,12 +13,16 @@ env:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v1
 
+      - uses: actions/cache@v2
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.action }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
       - name: build and install library
         run: |
           cmake -H. -Bbuild -DCMAKE_BUILD_TYPE=Release
@@ -26,7 +30,9 @@ jobs:
           rm -rf build
 
       - name: configure
-      run: cmake -Htest -Bbuild -DTEST_INSTALLED_VERSION=1
+        env:
+          CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+        run: cmake -Stest -Bbuild -DTEST_INSTALLED_VERSION=1
 
       - name: build
         run: cmake --build build --config Debug -j4

.github/workflows/macos.yml

@@ -13,14 +13,20 @@ env:
 
 jobs:
   build:
-
     runs-on: macos-latest
 
     steps:
       - uses: actions/checkout@v1
 
+      - uses: actions/cache@v2
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.action }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
       - name: configure
-      run: cmake -Htest -Bbuild -DCMAKE_BUILD_TYPE=Debug
+        env:
+          CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+        run: cmake -Stest -Bbuild -DCMAKE_BUILD_TYPE=Debug
 
       - name: build
         run: cmake --build build -j4

.github/workflows/standalone.yml

@@ -10,14 +10,20 @@ on:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v1
 
+      - uses: actions/cache@v2
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.action }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
       - name: configure
-      run: cmake -Hstandalone -Bbuild -DCMAKE_BUILD_TYPE=Debug
+        env:
+          CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+        run: cmake -Sstandalone -Bbuild -DCMAKE_BUILD_TYPE=Debug -DCMAKE_BUILD_TYPE=Debug
 
       - name: build
         run: cmake --build build -j4

.github/workflows/style.yml

@@ -10,19 +10,25 @@ on:
 
 jobs:
   build:
-
     runs-on: macos-latest
 
     steps:
       - uses: actions/checkout@v1
 
+      - uses: actions/cache@v2
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.action }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
       - name: Install format dependencies
         run: |
           brew install clang-format
           pip3 install cmake_format==0.6.11 pyyaml
 
       - name: configure
-      run: cmake -Htest -Bbuild
+        env:
+          CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+        run: cmake -Stest -Bbuild
 
       - name: check style
         run: cmake --build build --target check-format

.github/workflows/ubuntu.yml

@@ -14,14 +14,20 @@ env:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v1
 
+      - uses: actions/cache@v2
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.action }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
       - name: configure
-      run: cmake -Htest -Bbuild -DENABLE_TEST_COVERAGE=1 -DCMAKE_BUILD_TYPE=Debug
+        env:
+          CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+        run: cmake -Stest -Bbuild -DENABLE_TEST_COVERAGE=1 -DCMAKE_BUILD_TYPE=Debug
 
       - name: build
         run: cmake --build build -j4

.github/workflows/windows.yml

@@ -13,14 +13,20 @@ env:
 
 jobs:
   build:
-
     runs-on: windows-latest
 
     steps:
       - uses: actions/checkout@v1
 
+      - uses: actions/cache@v2
+        with:
+          path: "**/cpm_modules"
+          key: ${{ github.action }}-cpm-modules-${{ hashFiles('**/CMakeLists.txt', '**/*.cmake') }}
+
       - name: configure
-      run: cmake -Htest -Bbuild
+        env:
+          CPM_SOURCE_CACHE: ${{ github.workspace }}/cpm_modules
+        run: cmake -Stest -Bbuild
 
       - name: build
         run: cmake --build build --config Debug -j4

cmake/CPM.cmake

@@ -1,4 +1,4 @@
-set(CPM_DOWNLOAD_VERSION 0.27.2)
+set(CPM_DOWNLOAD_VERSION 0.28.0)
 
 if(CPM_SOURCE_CACHE)
   set(CPM_DOWNLOAD_LOCATION "${CPM_SOURCE_CACHE}/cpm/CPM_${CPM_DOWNLOAD_VERSION}.cmake")