Remove Debian Jessie from CI. (#1713)

It has reached end-of-life with the
end of LTS on June 30, 2020.

Signed-off-by: Wolfgang Hess <whess@lyft.com>

.travis.yml

@@ -25,7 +25,6 @@ env:
   - LSB_RELEASE=xenial DOCKER_CACHE_FILE=/home/travis/docker/xenial-cache.tar.gz CC=gcc CXX=g++
   - LSB_RELEASE=bionic DOCKER_CACHE_FILE=/home/travis/docker/bionic-cache.tar.gz CC=gcc CXX=g++
   - LSB_RELEASE=focal DOCKER_CACHE_FILE=/home/travis/docker/focal-cache.tar.gz CC=gcc CXX=g++
-  - LSB_RELEASE=jessie DOCKER_CACHE_FILE=/home/travis/docker/jessie-cache.tar.gz CC=gcc CXX=g++
   - LSB_RELEASE=stretch DOCKER_CACHE_FILE=/home/travis/docker/stretch-cache.tar.gz CC=gcc CXX=g++
 
 before_install: scripts/load_docker_cache.sh

Dockerfile.jessie

@@ -1,36 +0,0 @@
-# Copyright 2016 The Cartographer Authors
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-FROM debian:jessie
-
-ARG cc
-ARG cxx
-
-# Set the preferred C/C++ compiler toolchain, if given (otherwise default).
-ENV CC=$cc
-ENV CXX=$cxx
-
-# This base image doesn't ship with sudo.
-RUN apt-get update && apt-get install -y sudo && rm -rf /var/lib/apt/lists/*
-
-COPY scripts/install_debs_cmake.sh cartographer/scripts/
-RUN cartographer/scripts/install_debs_cmake.sh && rm -rf /var/lib/apt/lists/*
-COPY scripts/install_abseil.sh cartographer/scripts/
-RUN cartographer/scripts/install_abseil.sh && rm -rf /var/lib/apt/lists/*
-COPY scripts/install_ceres.sh cartographer/scripts/
-RUN cartographer/scripts/install_ceres.sh && rm -rf ceres-solver
-COPY scripts/install_proto3.sh cartographer/scripts/
-RUN cartographer/scripts/install_proto3.sh && rm -rf protobuf
-COPY . cartographer
-RUN cartographer/scripts/install_cartographer_cmake.sh && rm -rf cartographer

scripts/install_debs_cmake.sh

@@ -19,21 +19,9 @@ set -o verbose
 
 # Install the required libraries that are available as debs.
 sudo apt-get update
-
-# Install CMake 3.2 for Debian Jessie.
-sudo apt-get install lsb-release -y
-if [[ "$(lsb_release -sc)" = "jessie" ]]
-then
-  sudo sh -c "echo 'deb [check-valid-until=no] http://archive.debian.org/debian jessie-backports main' >> /etc/apt/sources.list"
-  sudo sh -c "echo 'Acquire::Check-Valid-Until \"false\";' >> /etc/apt/apt.conf"
-  sudo apt-get update
-  sudo apt-get -t jessie-backports install cmake -y
-else
-  sudo apt-get install cmake -y
-fi
-
 sudo apt-get install -y \
     clang \
+    cmake \
     g++ \
     git \
     google-mock \
@@ -45,6 +33,7 @@ sudo apt-get install -y \
     libgoogle-glog-dev \
     liblua5.2-dev \
     libsuitesparse-dev \
+    lsb-release \
     ninja-build \
     stow