Installing dependencies with conan on github actions takes too long - cmake

Question

I have built a Github workflow that installs Conan to manage a bunch of C++ dependencies along with CMake. It works great and I can test that:
my environment works
my library builds
tests pass
at every commit.
However, it is not very convenient for repeated pushes, as the Conan install dependencies step takes too long. Is there a way to:
Bypass the Conan installation and reuse previous workspace if dependencies are unchanged (that is, most of the time)
If not, what is the "standard" to have an equivalent system configuration in place on my system for tests (Does Conan has a Python virtual environment equivalent, or should I use a Docker, or ... ?)
My workflow is the following:
name: CMake
on:
push:
branches: [ main ]
pull_request:
branches: [ main ]
env:
# Customize the CMake build type here (Release, Debug, RelWithDebInfo, etc.)
BUILD_TYPE: Release
jobs:
build:
# The CMake configure and build commands are platform agnostic and should work
# equally well on Windows or Mac.
# You can convert this to a matrix build if you need cross-platform coverage.
# See: https://docs.github.com/en/free-pro-team#latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
runs-on: ubuntu-latest
steps:
- uses: actions/checkout#v2
with:
fetch-depth: 0
- name: Get GCC-10
run: |
sudo apt update
sudo apt install gcc-10 g++-10
shell: bash
- name: Install Doxygen
run: sudo apt-get update && sudo apt-get install -y --no-install-recommends doxygen graphviz
- name: Conan installation
id: conan
uses: turtlebrowser/get-conan#v1.0
- name: Conan version
run: echo "${{ steps.conan.outputs.version }}"
- name: Create default Conan profile
run: conan profile new default --detect
- name: Conan configure remotes
run: |
conan remote add bincrafters https://bincrafters.jfrog.io/artifactory/api/conan/public-conan
conan config set general.revisions_enabled=1
- name: Conan profile update
run: |
conan profile update settings.compiler=gcc default
conan profile update settings.compiler.version=10 default
conan profile update settings.compiler.cppstd=20 default
conan profile update env.CC=[/usr/bin/gcc-10] default
conan profile update env.CXX=[/usr/bin/g++-10] default
conan profile update conf.tools.cmake.cmaketoolchain:generator=Ninja default
conan profile show default
- name: Conan install dependencies
run: |
conan install . \
-s build_type=${{env.BUILD_TYPE}} \
--install-folder=${{github.workspace}}/build \
-pr default \
-b=missing
- name: CMake configuration
# Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
# See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
run: |
cmake -B ${{github.workspace}}/build \
-DCMAKE_TOOLCHAIN_FILE=conan_toolchain.cmake \
-DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
shell: bash
env:
CC: gcc-10
CXX: g++-10
- name: Cmake build
run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
- name: Cmake test
working-directory: ${{github.workspace}}/build
run: ctest -C ${{env.BUILD_TYPE}}
- name: Doxygen documentation generation
working-directory: ${{github.workspace}}/build
run: make doc
- name: Documentation moving generated files
run: mv ${{github.workspace}}/build/doc/html ./doc/api
- name: Documentation deploy to Github Pages
uses: peaceiris/actions-gh-pages#v3
with:
github_token: ${{ secrets.GITHUB_TOKEN }}
publish_dir: ./doc/api