Initialize project from github.com/triqs/app4triqs@4de9b2a

.clang-format

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+BasedOnStyle: LLVM
+
+AccessModifierOffset: 0
+AlignAfterOpenBracket: Align
+AlignConsecutiveAssignments: true
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlinesLeft: false
+AlignOperands: false
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: false
+AllowShortBlocksOnASingleLine: true
+AllowShortCaseLabelsOnASingleLine: true
+AllowShortFunctionsOnASingleLine: All
+AllowShortIfStatementsOnASingleLine: true
+AllowShortLoopsOnASingleLine: true
+AlwaysBreakBeforeMultilineStrings: true
+AlwaysBreakTemplateDeclarations: false
+BinPackArguments: true
+BinPackParameters: true 
+BreakBeforeBinaryOperators: NonAssignment
+BreakBeforeBraces: Attach
+BreakBeforeTernaryOperators: false
+BreakConstructorInitializersBeforeComma: false
+BreakStringLiterals: false
+ColumnLimit: 150
+ConstructorInitializerAllOnOneLineOrOnePerLine: true
+ConstructorInitializerIndentWidth: 3
+ContinuationIndentWidth: 3
+Cpp11BracedListStyle: true
+DerivePointerBinding : false
+IndentCaseLabels: true
+IndentWidth: 2
+Language: Cpp
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation : All
+PointerAlignment: Right
+ReflowComments: false
+SortIncludes: false
+SpaceAfterControlStatementKeyword: true
+SpaceBeforeAssignmentOperators: true
+SpaceInEmptyParentheses: false
+SpacesInParentheses: false
+Standard: Cpp11
+TabWidth: 2
+UseTab: Never

.clang-tidy

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+Checks: '-*,modernize-*,cppcoreguidelines-*,-modernize-use-trailing-return-type'
+HeaderFilterRegex: 'app4triqs'

.dockerignore

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+.travis.yml
+Dockerfile
+Jenkinsfile
+.git/objects/pack
+build*

.github/ISSUE_TEMPLATE/bug.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: Bug report
+labels: bug
+
+---
+
+### Prerequisites
+
+* Please check that a similar issue isn't already filed: https://github.com/issues?q=is%3Aissue+user%3Atriqs
+
+### Description
+
+[Description of the issue]
+
+### Steps to Reproduce
+
+1. [First Step]
+2. [Second Step]
+3. [and so on...]
+
+or paste a minimal code example to reproduce the issue.
+
+**Expected behavior:** [What you expect to happen]
+
+**Actual behavior:** [What actually happens]
+
+### Versions
+
+Please provide the application version that you used.
+
+You can get this information from copy and pasting the output of
+```bash
+python -c "from app4triqs.version import *; show_version(); show_git_hash();"
+```
+from the command line. Also, please include the OS you are running and its version.
+
+### Formatting
+
+Please use markdown in your issue message. A useful summary of commands can be found [here](https://guides.github.com/pdfs/markdown-cheatsheet-online.pdf).
+
+### Additional Information
+
+Any additional information, configuration or data that might be necessary to reproduce the issue.

.github/ISSUE_TEMPLATE/feature.md

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+---
+name: Feature request
+about: Suggest an idea for this project
+title: Feature request
+labels: feature
+
+---
+
+### Summary
+
+One paragraph explanation of the feature.
+
+### Motivation
+
+Why is this feature of general interest?
+
+### Implementation
+
+What user interface do you suggest?
+
+### Formatting
+
+Please use markdown in your issue message. A useful summary of commands can be found [here](https://guides.github.com/pdfs/markdown-cheatsheet-online.pdf).

.github/workflows/build.yml

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+name: build
+
+on:
+  push:
+    branches: [ unstable ]
+  pull_request:
+    branches: [ unstable ]
+
+jobs:
+  build:
+
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - {os: ubuntu-20.04, cc: gcc-10, cxx: g++-10}
+          - {os: ubuntu-20.04, cc: clang-10, cxx: clang++-10}
+          - {os: macos-10.15, cc: gcc-10, cxx: g++-10}
+          - {os: macos-10.15, cc: /usr/local/opt/llvm/bin/clang, cxx: /usr/local/opt/llvm/bin/clang++}
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Install ubuntu dependencies
+      if: matrix.os == 'ubuntu-20.04'
+      run: >
+        sudo apt-get update &&
+        sudo apt-get install
+        clang-10
+        g++-10
+        gfortran
+        hdf5-tools
+        libblas-dev
+        libboost-dev
+        libclang-10-dev
+        libc++-10-dev
+        libc++abi-10-dev
+        libfftw3-dev
+        libgfortran4
+        libgmp-dev
+        libhdf5-dev
+        liblapack-dev
+        libopenmpi-dev
+        openmpi-bin
+        openmpi-common
+        openmpi-doc
+        python3-clang-10
+        python3-dev
+        python3-mako
+        python3-matplotlib
+        python3-mpi4py
+        python3-numpy
+        python3-pip
+        python3-scipy
+        python3-sphinx
+        python3-nbsphinx
+
+    - name: Install homebrew dependencies
+      if: matrix.os == 'macos-10.15'
+      run: |
+        brew install gcc@10 llvm boost fftw hdf5 open-mpi openblas
+        pip3 install mako numpy scipy mpi4py
+        pip3 install -r requirements.txt
+
+    - name: Build & Install TRIQS
+      env:
+        CC: ${{ matrix.cc }}
+        CXX: ${{ matrix.cxx }}
+      run: |
+        git clone https://github.com/TRIQS/triqs --branch unstable
+        mkdir triqs/build && cd triqs/build
+        cmake .. -DBuild_Tests=OFF -DCMAKE_INSTALL_PREFIX=$HOME/install
+        make -j1 install VERBOSE=1
+        cd ../
+
+    - name: Build app4triqs
+      env:
+        CC: ${{ matrix.cc }}
+        CXX: ${{ matrix.cxx }}
+        LIBRARY_PATH: /usr/local/opt/llvm/lib
+      run: |
+        source $HOME/install/share/triqs/triqsvars.sh
+        mkdir build && cmake -B build
+        cmake --build build -j2
+
+    - name: Test app4triqs
+      env:
+        DYLD_FALLBACK_LIBRARY_PATH: /usr/local/opt/llvm/lib
+      run: |
+        source $HOME/install/share/triqs/triqsvars.sh
+        cd build
+        ctest -j2 --output-on-failure

.gitignore

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+compile_commands.json
+doc/cpp2rst_generated

CMakeLists.txt

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+# ##############################################################################
+#
+# app4triqs - An example application using triqs and cpp2py
+#
+# Copyright (C) ...
+#
+# app4triqs is free software: you can redistribute it and/or modify it under the
+# terms of the GNU General Public License as published by the Free Software
+# Foundation, either version 3 of the License, or (at your option) any later
+# version.
+#
+# app4triqs is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+# A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License along with
+# app4triqs (in the file COPYING.txt in this directory). If not, see
+# <http://www.gnu.org/licenses/>.
+#
+# ##############################################################################
+
+cmake_minimum_required(VERSION 3.9.6 FATAL_ERROR)
+cmake_policy(VERSION 3.9.6)
+if(POLICY CMP0074)
+  cmake_policy(SET CMP0074 NEW)
+endif()
+if(POLICY CMP0077)
+  cmake_policy(SET CMP0077 NEW)
+endif()
+
+# ############
+# Define Project
+project(app4triqs VERSION 3.0.0 LANGUAGES C CXX)
+get_directory_property(IS_SUBPROJECT PARENT_DIRECTORY)
+
+# ############
+# Load TRIQS and CPP2PY
+find_package(TRIQS 3.0 REQUIRED)
+
+# Get the git hash & print status
+triqs_get_git_hash_of_source_dir(PROJECT_GIT_HASH)
+message(STATUS "${PROJECT_NAME} version : ${PROJECT_VERSION}")
+message(STATUS "${PROJECT_NAME} Git hash: ${PROJECT_GIT_HASH}")
+
+# Enforce Consistent Versioning
+if(NOT ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR} VERSION_EQUAL ${TRIQS_VERSION_MAJOR}.${TRIQS_VERSION_MINOR})
+  message(FATAL_ERROR "The ${PROJECT_NAME} version ${PROJECT_VERSION} is not compatible with TRIQS version ${TRIQS_VERSION}.")
+endif()
+
+# Default Install directory to TRIQS_ROOT if not given or invalid.
+if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT OR (NOT IS_ABSOLUTE ${CMAKE_INSTALL_PREFIX}))
+  message(STATUS "No install prefix given (or invalid). Defaulting to TRIQS_ROOT")
+  set(CMAKE_INSTALL_PREFIX ${TRIQS_ROOT} CACHE PATH "default install path" FORCE)
+  set(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT FALSE)
+endif()
+if(NOT IS_SUBPROJECT)
+  message(STATUS "-------- CMAKE_INSTALL_PREFIX: ${CMAKE_INSTALL_PREFIX} --------")
+endif()
+set(${PROJECT_NAME}_BINARY_DIR ${PROJECT_BINARY_DIR} CACHE STRING "Binary directory of the ${PROJECT_NAME} Project")
+
+# Make additional Find Modules available
+list(APPEND CMAKE_MODULE_PATH ${PROJECT_SOURCE_DIR}/share/cmake/Modules)
+
+# ############
+# CMake Options
+
+# Default to Release build type
+if(NOT CMAKE_BUILD_TYPE)
+  set(CMAKE_BUILD_TYPE Release CACHE STRING "Type of build" FORCE)
+endif()
+if(NOT IS_SUBPROJECT)
+  message(STATUS "-------- BUILD-TYPE: ${CMAKE_BUILD_TYPE} --------")
+endif()
+
+# Python Support
+if(NOT TRIQS_WITH_PYTHON_SUPPORT)
+  message(FATAL_ERROR "TRIQS was installed without Python support. Cannot build the Python Interface. Disable the build with -DPythonSupport=OFF")
+endif()
+
+# Documentation
+option(Build_Documentation "Build documentation" OFF)
+
+# Testing
+option(Build_Tests "Build tests" ON)
+if(Build_Tests)
+  enable_testing()
+endif()
+
+# #############
+# Build Project
+
+# Find / Build dependencies
+add_subdirectory(deps)
+
+# Tests
+if(Build_Tests)
+  add_subdirectory(test)
+endif()
+
+# Python
+add_subdirectory(python/${PROJECT_NAME})
+
+# Docs
+if(Build_Documentation)
+  add_subdirectory(doc)
+endif()
+
+# Additional configuration files
+add_subdirectory(share)
+
+# #############
+# Debian Package
+
+option(BUILD_DEBIAN_PACKAGE "Build a deb package" OFF)
+if(BUILD_DEBIAN_PACKAGE AND NOT IS_SUBPROJECT)
+  if(NOT CMAKE_INSTALL_PREFIX STREQUAL "/usr")
+    message(FATAL_ERROR "CMAKE_INSTALL_PREFIX must be /usr for packaging")
+  endif()
+  set(CPACK_PACKAGE_NAME ${PROJECT_NAME})
+  set(CPACK_GENERATOR "DEB")
+  set(CPACK_PACKAGE_VERSION ${PROJECT_VERSION})
+  set(CPACK_PACKAGE_CONTACT "https://github.com/TRIQS/${PROJECT_NAME}")
+  execute_process(COMMAND dpkg --print-architecture OUTPUT_VARIABLE CMAKE_DEBIAN_PACKAGE_ARCHITECTURE OUTPUT_STRIP_TRAILING_WHITESPACE)
+  set(CPACK_DEBIAN_PACKAGE_DEPENDS "triqs (>= 3.0)")
+  set(CPACK_DEBIAN_PACKAGE_SHLIBDEPS ON)
+  set(CPACK_DEBIAN_PACKAGE_GENERATE_SHLIBS ON)
+  include(CPack)
+endif()