travis: run void host in docker to compile/test

The current CI runs in ubuntu containers, which do not provide a
recent enough version of libarchive. This uses official Void
docker images to compile and run tests on the xbps repo.

Closes: #39 [via git-merge-pr]

.travis.yml

@@ -1,25 +1,21 @@
-language: c
-compiler:
-        - gcc
-        - clang
+language: generic
+
+notifications:
+  email: false
+
+services:
+ - docker
 
-addons:
-  apt:
-    sources:
-        - gdb
-        - liblua5.2-0
-        - liblua5.2-dev
-        - libsqlite3-0
-        - libsqlite3-dev
-        - pkg-config
-        - sqlite3
-        - libssl-dev
-        - libarchive-dev
 env:
-        - PKG_CONFIG_PATH=/tmp/usr/lib/pkgconfig LD_LIBRARY_PATH=/tmp/usr/lib
+  global:
+   - MAKEJOBS = -j4
+  matrix:
+   - CC=gcc DEPENDENCY_PACKAGES="bash kyua zlib-devel libarchive-devel base-devel atf-devel"
+   - CC=clang DEPENDENCY_PACKAGES="clang bash kyua zlib-devel libarchive-devel base-devel atf-devel"
 
-before_install:
-        - ./admin/travis-install-deps.sh
+install:
+ - docker pull voidlinux/voidlinux
+ - docker run -v "$PWD":/tmp/build-dir voidlinux/voidlinux /bin/sh -c "xbps-install -Syu && xbps-install -y $DEPENDENCY_PACKAGES && cd /tmp/build-dir && CC=$CC ./configure --enable-tests --enable-debug && make $MAKEJOBS && make check"
 
 script:
-        - LDFLAGS="-L/tmp/usr/lib -Wl,-R/tmp/usr/lib" ./configure --enable-tests --enable-debug && make -j16 && make check
+ - echo BUILDS PASSED

admin/travis-install-deps.sh

@@ -1,62 +0,0 @@
-#! /bin/sh
-# Copyright 2014 Google Inc.
-# All rights reserved.
-#
-# Redistribution and use in source and binary forms, with or without
-# modification, are permitted provided that the following conditions are
-# met:
-#
-# * Redistributions of source code must retain the above copyright
-#   notice, this list of conditions and the following disclaimer.
-# * Redistributions in binary form must reproduce the above copyright
-#   notice, this list of conditions and the following disclaimer in the
-#   documentation and/or other materials provided with the distribution.
-# * Neither the name of Google Inc. nor the names of its contributors
-#   may be used to endorse or promote products derived from this software
-#   without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-set -e -x
-
-install_from_github() {
-    local project="${1}"; shift
-    local name="${1}"; shift
-    local release="${1}"; shift
-
-    local distname="${name}-${release}"
-
-    local baseurl="https://github.com/jmmv/${project}"
-    wget --no-check-certificate \
-        "${baseurl}/releases/download/${distname}/${distname}.tar.gz"
-    tar -xzvf "${distname}.tar.gz"
-
-    cd "${distname}"
-    ./configure \
-        --prefix=/tmp/usr \
-        --disable-developer \
-        --without-atf \
-        --without-doxygen \
-        CPPFLAGS="-I/usr/local/include" \
-        LDFLAGS="-L/usr/local/lib -Wl,-R/usr/local/lib" \
-        PKG_CONFIG_PATH="/usr/local/lib/pkgconfig"
-    make -j16
-    make install
-    cd -
-
-    rm -rf "${distname}" "${distname}.tar.gz"
-}
-
-install_from_github atf atf 0.21
-install_from_github lutok lutok 0.4
-install_from_github kyua kyua 0.12