Add restored mavlink contents as static library

src/modules/mavlink/mavlink/.github/stale.yml

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+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: false
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - pinned
+  - security
+# Label to use when marking an issue as stale
+staleLabel: stale
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. Thank you for your contributions.
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false

src/modules/mavlink/mavlink/.github/workflows/test_and_deploy.yml

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+name: Test and deploy
+
+on:
+  push:
+    branches:
+    - 'master'
+  pull_request:
+    branches:
+    - '*'
+
+# paths:
+# - "*"
+# - "!README.md" <-- don't rebuild on doc change
+
+permissions:
+  contents: read
+
+jobs:
+  format:
+    name: Formatting check
+    runs-on: ubuntu-20.04
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+      - run: |
+          sudo apt update
+          sudo apt install -y libxml2-dev libxml2-utils
+      - name: Check formatting
+        run: |
+          ./scripts/test.sh format
+
+  python-tests:
+    name: Python ${{ matrix.python-version }} tests
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        python-version: ['2.7', '3.7', '3.8', '3.9', '3.10', '3.11']
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+      - name: Set up Python ${{ matrix.python-version }}
+        uses: actions/setup-python@v2
+        with:
+          python-version: ${{ matrix.python-version }}
+      - name: Install dependencies
+        run: |
+          pip install future lxml
+      - name : Test Python generator
+        run: |
+          ./scripts/test.sh py
+
+  build-cmake-c-example:
+    name: Build cmake C example
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+      - name: Install dependencies
+        run: |
+          sudo apt update
+          sudo apt install -y python3 python3-pip
+      - name: Install MAVLink headers
+        run: |
+          cmake -Bbuild -H. -DCMAKE_INSTALL_PREFIX=install
+          cmake --build build --target install
+      - name: Build example
+        run: |
+          cd examples/c
+          cmake -Bbuild -H. -DCMAKE_PREFIX_PATH=$(pwd)/../../install
+          cmake --build build
+
+  node-tests:
+    name: Node ${{ matrix.node-version }} test
+    runs-on: ubuntu-20.04
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: ['12', '14'] # 15 fails for some weird reason
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Install dependencies
+        run: |
+          pip install future lxml
+      - uses: actions/setup-node@v2
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - name : Test mavlink
+        run: |
+          ./scripts/test.sh node
+
+  deploy:
+    name: Generate and push C headers
+    needs: [format, python-tests, node-tests]
+    runs-on: ubuntu-20.04
+    if: github.ref == 'refs/heads/master'
+    env:
+      GH_TOKEN: ${{ secrets.GH_TOKEN }}
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          submodules: 'recursive'
+      - name: Set up Python 3.8
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.8
+      - name: Install dependencies
+        run: |
+          pip install future lxml
+      - name: Run deploy script
+        run: |
+          ./scripts/update_generated_repos.sh

src/modules/mavlink/mavlink/.gitignore

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+*~
+tags
+doc/html
+doc/messages
+doc/*.log
+.DS_Store
+build*
+install*
+.nfs*
+share/
+__pycache__
+pymavlink/generator/C/
+pymavlink/generator/C/
+pymavlink/generator/python/
+pymavlink/generator/python/
+apidocs/
+pymavlink/generator/message_definitions
+*.swp
+pymavlink/dialects/
+pymavlink/MANIFEST
+pymavlink/dist
+pymavlink.egg-info/
+.pydevproject
+.project
+.ropeproject
+*.cproject
+include/
+.tags*
+*.pyc
+include/mavlink/v1.0
+.idea
+/.vscode

src/modules/mavlink/mavlink/.gitmodules

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+[submodule "pymavlink"]
+	path = pymavlink
+	url = https://github.com/ardupilot/pymavlink.git

src/modules/mavlink/mavlink/CMakeLists.txt

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+cmake_minimum_required(VERSION 3.13)
+
+project(mavlink)
+
+find_package(Python COMPONENTS Interpreter REQUIRED)
+
+# We automatically install the pip dependencies locally below.
+# Therefore, we check whether pip is available here.
+execute_process(
+    COMMAND ${Python_EXECUTABLE} -m pip -V
+    RESULT_VARIABLE EXIT_CODE
+    OUTPUT_QUIET
+)
+if (NOT ${EXIT_CODE} EQUAL 0)
+    message(FATAL_ERROR "Python pip not found, pip is required")
+endif()
+
+if (NOT MAVLINK_DIALECT)
+    set(MAVLINK_DIALECT common)
+endif()
+message(STATUS "MAVLink dialect: ${MAVLINK_DIALECT}")
+
+if (NOT MAVLINK_VERSION)
+    set(MAVLINK_VERSION 2.0)
+endif()
+message(STATUS "MAVLink version: ${MAVLINK_VERSION}")
+
+set(EXAMPLE_HEADER ${CMAKE_CURRENT_BINARY_DIR}/include/mavlink/${MAVLINK_DIALECT}/mavlink.h)
+
+add_custom_command(OUTPUT ${EXAMPLE_HEADER}
+    COMMAND ${Python_EXECUTABLE}
+        -m pip install -r pymavlink/requirements.txt --upgrade -t ${CMAKE_CURRENT_BINARY_DIR}/pip-dependencies/
+        COMMAND ${CMAKE_COMMAND} -E env "PYTHONPATH=${CMAKE_CURRENT_BINARY_DIR}/pip-dependencies/" ${Python_EXECUTABLE}
+        -m pymavlink.tools.mavgen
+        --lang=C
+        --wire-protocol=${MAVLINK_VERSION}
+        --output ${CMAKE_CURRENT_BINARY_DIR}/include/mavlink/
+        message_definitions/v1.0/${MAVLINK_DIALECT}.xml
+        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+    DEPENDS message_definitions/v1.0/${MAVLINK_DIALECT}.xml
+    COMMENT "Generating C headers")
+
+# Unfortunately, the dependencies don't work for INTERFACE libraries.
+# The only way I could make it work is to add ALL which means it
+# will do the file generation every time even when nothing has changed.
+add_custom_target(generate_c_headers
+    ALL
+    DEPENDS ${EXAMPLE_HEADER})
+
+add_library(mavlink INTERFACE)
+
+add_dependencies(mavlink generate_c_headers)
+
+include(GNUInstallDirs)
+
+target_include_directories(mavlink
+    INTERFACE
+    $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+)
+
+install(TARGETS mavlink
+    EXPORT MAVLinkTargets
+    PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+)
+
+install(DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/include/mavlink"
+    DESTINATION "${CMAKE_INSTALL_INCLUDEDIR}"
+    FILES_MATCHING PATTERN "*.h"
+)
+
+install(EXPORT MAVLinkTargets
+    FILE MAVLinkTargets.cmake
+    NAMESPACE MAVLink::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/MAVLink
+)
+
+# For the build tree
+configure_file(MAVLinkConfig.cmake.in
+    "${PROJECT_BINARY_DIR}/MAVLinkConfig.cmake" @ONLY)
+# For the install tree
+configure_file(MAVLinkConfig.cmake.in
+    "${PROJECT_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/MAVLinkConfig.cmake" @ONLY)
+
+install(FILES
+    "${PROJECT_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/MAVLinkConfig.cmake"
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/MAVLink
+)

src/modules/mavlink/mavlink/CONTRIBUTING.md

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+# Contributing to MAVLink
+
+See [Contributing](https://mavlink.io/en/contributing/contributing.html) (MAVLink Developer Guide).