Github workflow build cache (#4150)

Cache intermediary build artefacts to speed up build time.

.github/actions/restore-git-mtimes/action.yml

@@ -0,0 +1,14 @@
+name: "restore-git-mtimes"
+description: "Restore file modification timestamps from git commit timestamps"
+runs:
+  using: "composite"
+  steps:
+    - uses: actions/checkout@v3
+      with:
+        repository: "MestreLion/git-tools"
+        ref: a42a069bc755f0fa81316965335cb33dbf22a968 # pin latest commit
+        path: "git-tools"
+    - run: $GITHUB_WORKSPACE/git-tools/git-restore-mtime
+      shell: bash
+    - run: git submodule foreach --recursive '$GITHUB_WORKSPACE/git-tools/git-restore-mtime'
+      shell: bash

.github/workflows/unit_tests.yml

@@ -26,6 +26,18 @@ jobs:
         uses: actions/checkout@v3
         with:
           submodules: "recursive"
+          fetch-depth: 0 # full history needed for restoring file timestamps
+
+      - name: Restore Timestamps
+        uses: ./.github/actions/restore-git-mtimes
+        continue-on-error: true
+
+      - name: Restore Build Cache
+        uses: actions/cache/restore@v3
+        continue-on-error: true
+        with:
+          path: build
+          key: ${{ runner.os }}-build-cache
 
       - name: Fetch Deps
         run: TEST=1 ci/actions/osx/install_deps.sh
@@ -33,6 +45,15 @@ jobs:
       - name: Build Tests
         run: ci/build-ci.sh "/tmp/qt/lib/cmake/Qt5";
 
+      - name: Save Build Cache
+        # only save build cache from develop to avoid polluting it by other branches / PRs
+        if: github.ref == 'refs/heads/develop' && success()
+        uses: actions/cache/save@v3
+        continue-on-error: true
+        with:
+          path: build
+          key: ${{ runner.os }}-build-cache
+
       - name: Run Tests
         run: cd build && sudo TEST_USE_ROCKSDB=$TEST_USE_ROCKSDB ../ci/test.sh .
         env:
@@ -60,6 +81,18 @@ jobs:
         uses: actions/checkout@v3
         with:
           submodules: "recursive"
+          fetch-depth: 0 # full history needed for restoring file timestamps
+
+      - name: Restore Timestamps
+        uses: ./.github/actions/restore-git-mtimes
+        continue-on-error: true
+
+      - name: Restore Build Cache
+        uses: actions/cache/restore@v3
+        continue-on-error: true
+        with:
+          path: build
+          key: ${{ runner.os }}-${{ env.COMPILER }}-build-cache
 
       - name: Fetch Deps
         run: ci/actions/linux/install_deps.sh
@@ -67,6 +100,15 @@ jobs:
       - name: Build Tests
         run: docker run -e TEST_USE_ROCKSDB  -e RELEASE -v ${PWD}:/workspace nanocurrency/nano-env:${{ matrix.COMPILER }} /bin/bash -c "cd /workspace && ./ci/build-ci.sh /usr/lib/x86_64-linux-gnu/cmake/Qt5"
 
+      - name: Save Build Cache
+        # only save build cache from develop to avoid polluting it by other branches / PRs
+        if: github.ref == 'refs/heads/develop' && success()
+        uses: actions/cache/save@v3
+        continue-on-error: true
+        with:
+          path: build
+          key: ${{ runner.os }}-${{ env.COMPILER }}-build-cache
+
       - name: Run Tests
         run: docker run -e RELEASE -e TEST_USE_ROCKSDB -e DEADLINE_SCALE_FACTOR -v ${PWD}:/workspace nanocurrency/nano-env:${{ matrix.COMPILER }} /bin/bash -c "cd /workspace/build && ../ci/test.sh ."
         env:
@@ -92,6 +134,18 @@ jobs:
         uses: actions/checkout@v3
         with:
           submodules: "recursive"
+          fetch-depth: 0 # full history needed for restoring file timestamps
+
+      - name: Restore Timestamps
+        uses: ./.github/actions/restore-git-mtimes
+        continue-on-error: true
+
+      - name: Restore Build Cache
+        uses: actions/cache/restore@v3
+        continue-on-error: true
+        with:
+          path: build
+          key: ${{ runner.os }}-build-cache
 
       - name: Windows Defender
         run: ci/actions/windows/disable_windows_defender.ps1
@@ -102,6 +156,15 @@ jobs:
       - name: Build Tests
         run: ci/actions/windows/build.ps1
 
+      - name: Save Build Cache
+        # only save build cache from develop to avoid polluting it by other branches / PRs
+        if: github.ref == 'refs/heads/develop' && success()
+        uses: actions/cache/save@v3
+        continue-on-error: true
+        with:
+          path: build
+          key: ${{ runner.os }}-build-cache
+
       - name: Run Tests [TEST_USE_ROCKSDB=${{ env.TEST_USE_ROCKSDB }}]
         run: ci/actions/windows/run.ps1
         env:

ci/build-ci.sh

@@ -3,15 +3,12 @@
 qt_dir=${1}
 build_target=${2:-all}
 
-set -o errexit
-set -o nounset
-set -o xtrace
 OS=$(uname)
 
 source "$(dirname "$BASH_SOURCE")/impl/code-inspector.sh"
 code_inspect "${ROOTPATH:-.}"
 
-mkdir build
+mkdir -p build
 pushd build
 
 if [[ "${RELEASE:-false}" == "true" ]]; then
@@ -49,7 +46,6 @@ cmake \
 -DPORTABLE=1 \
 -DNANO_WARN_TO_ERR=ON \
 -DCMAKE_BUILD_TYPE=${BUILD_TYPE:-Debug} \
--DCMAKE_VERBOSE_MAKEFILE=ON \
 -DQt5_DIR=${qt_dir} \
 -DCI_TEST="1" \
 ${BACKTRACE:-} \