build: add Travis build configuration

sys/.travis.yml

@@ -0,0 +1,38 @@
+sudo: required
+dist: trusty
+
+language: rust
+rust:
+  - stable
+  - beta
+  - nightly
+matrix:
+  allow_failures:
+    - rust: nightly
+addons:
+  apt:
+    packages:
+      - build-essential
+before_install:
+  - sudo apt-get update -q
+  # From https://trac.ffmpeg.org/wiki/CompilationGuide/Ubuntu
+  - sudo apt-get -y --force-yes install autoconf automake build-essential libass-dev libfreetype6-dev libsdl1.2-dev libtheora-dev libtool libva-dev libvdpau-dev libvorbis-dev libxcb1-dev libxcb-shm0-dev libxcb-xfixes0-dev pkg-config texinfo zlib1g-dev
+  - sudo apt-get install yasm
+  - pushd ~
+  - git clone https://github.com/FFmpeg/FFmpeg.git
+  - cd FFmpeg
+  - git checkout release/2.8
+  - mkdir ~/FFmpeg-build
+  - cd ~/FFmpeg-build
+  - ../FFmpeg/configure --disable-ffprobe --disable-ffserver --disable-doc --enable-avresample
+  - make -j
+  - sudo make install
+  - make distclean
+  - popd
+
+script:
+  # Current Travis Ubuntu version uses libav which doesn't come with libswresample
+  - cargo build --verbose --no-default-features --features "avcodec avfilter avformat avresample swscale"
+  - cargo test  --verbose --no-default-features --features "avcodec avfilter avformat avresample swscale"
+after_failure:
+  - find /usr -type f 2>/dev/null | grep -E 'lib(avcodec/version|avcodec/avcodec).h$' | xargs -I THEFILE -- sh -c 'echo "=== THEFILE ==="; cat THEFILE'

sys/tests/data/ffmpeg-structs.c

@@ -1,3 +1,5 @@
+#include <stdio.h>
+
 #include <libavcodec/avcodec.h>
 
 int main()

sys/tests/lib.rs

@@ -2,10 +2,10 @@ extern crate libc;
 extern crate ffmpeg_sys;
 
 use std::env;
-use std::fs::{create_dir, File};
+use std::fs::{create_dir, File, symlink_metadata};
 use std::io::Write;
 use std::mem;
-use std::path::PathBuf;
+use std::path::{Path, PathBuf};
 use std::process::Command;
 use std::str;
 
@@ -14,8 +14,11 @@ use libc::c_void;
 use ffmpeg_sys::AVCodecContext;
 
 fn output() -> PathBuf {
-	let ret = PathBuf::from("tmp");
-	create_dir(&ret).ok();
+	let mut ret = std::env::current_dir().unwrap();
+	ret.push(&Path::new("tmp"));
+	if symlink_metadata(&ret).is_err() {
+		create_dir(&ret).expect("Failed to create temporary output dir");
+	}
 	ret
 }