ci: Migrate from Travis to GitLab CI

This makes more sense now since we're using FDO GitLab for all the other
development infra.

.gitlab-ci.yml

@@ -0,0 +1,13 @@
+image: registry.freedesktop.org/pipewire/pipewire/fedora:31
+
+build:
+  stage: build
+  script:
+     - ./autogen.sh -Ddocs=true -Daudiomixer=true -Daudiotestsrc=true -Dtest=true -Dvideotestsrc=true -Dvolume=true
+     - make
+     - make test
+     - DESTDIR=$PWD/build/i make install
+     - PREFIX=$PWD/build/i/usr/local ./check_missing_headers.sh
+  artifacts:
+    paths:
+      - build/

.travis.yml

@@ -1,28 +0,0 @@
-sudo: required
-language: minimal
-services:
-  - docker
-addons:
-  apt:
-    packages:
-      - docker-ce
-before_install:
-  - docker pull gkiagia/pipewire_build_environment:latest
-script:
-  - >
-    docker run -it --rm -v $PWD:/workdir gkiagia/pipewire_build_environment:latest bash -c
-    'cd /workdir \
-      && env MESON=meson ./autogen.sh \
-        -Ddocs=true \
-        -Daudiomixer=true \
-        -Daudiotestsrc=true \
-        -Dffmpeg=true \
-        -Dtest=true \
-        -Dvideotestsrc=true \
-        -Dvolume=true \
-        -Dvulkan=false \
-      && make \
-      && make test \
-      && env DESTDIR=$PWD/build/i make install \
-      && env PREFIX=$PWD/build/i/usr/local ./check_missing_headers.sh \
-    '

Dockerfile

@@ -6,6 +6,7 @@ LABEL description="Fedora-based environment for building PipeWire" \
 
 # Install pipewire dependencies
 RUN dnf -y install \
+    which \
     gcc \
     meson \
     systemd-devel \