Migrate from Travis CI to GitHub Actions

This removes all CI builds from travis-ci, due to their recent changes
in policy and harsh limitations on builds. With build times over 2
hours, it was a significant hindrance to development.

Instead of Travis CI, the CI is now split on Sourcehut and GitHub. Since
Sourcehut only supports Linux/BSD, all builds on those operating systems
are executed there. The GitHub Actions CI is used to build for
Windows/macOS, which are not available on Sourcehut.

Since asset deployment for releases requires builds on all platforms,
this is also done on GitHub actions. Though the new `upload_asset.sh`
script makes sure that migration in the future is fairly simple and we
do not tie ourselves to the overly complicated GitHub Actions ecosystem.

3 files changed, 60 insertions, 20 deletions

diff --git a/.builds/freebsd.yml b/.builds/freebsd.yml
index 10f0333a..ec2e1616 100644
--- a/.builds/freebsd.yml
+++ b/.builds/freebsd.yml
@@ -1,4 +1,5 @@
 image: freebsd/latest
+
 packages:
   - devel/cmake
   - devel/pkgconf
@@ -7,21 +8,30 @@ packages:
   - x11-fonts/fontconfig
   - x11-fonts/dejavu
   - x11/libxcb
+
 sources:
   - https://github.com/alacritty/alacritty
+
+environment:
+  PATH: /home/build/.cargo/bin:/bin:/usr/bin:/usr/local/bin
+
 tasks:
   - rustup: |
       curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain stable --profile minimal
-      $HOME/.cargo/bin/rustup toolchain install --profile minimal 1.43.1
-  - 1-43-1: |
+  - test: |
       cd alacritty
-      $HOME/.cargo/bin/cargo +1.43.1 test
-  - 1-43-1-wayland: |
+      cargo test
+  - clippy: |
+      cd alacritty
+      rustup component add clippy
+      cargo clippy --all-targets
+  - oldstable: |
+      cd alacritty
+      rustup toolchain install --profile minimal 1.43.1
+      cargo +1.43.1 test
+  - feature-wayland: |
       cd alacritty/alacritty
-      $HOME/.cargo/bin/cargo +1.43.1 test --no-default-features --features=wayland
-  - 1-43-1-x11: |
+      cargo test --no-default-features --features=wayland
+  - feature-x11: |
       cd alacritty/alacritty
-      $HOME/.cargo/bin/cargo +1.43.1 test --no-default-features --features=x11
-  - stable: |
-      cd alacritty
-      $HOME/.cargo/bin/cargo +stable test
+      cargo test --no-default-features --features=x11
diff --git a/.builds/linux.yml b/.builds/linux.yml
new file mode 100644
index 00000000..90c31836
--- /dev/null
+++ b/.builds/linux.yml
@@ -0,0 +1,40 @@
+image: archlinux
+
+packages:
+  - pkg-config
+  - cmake
+  - make
+  - freetype2
+  - fontconfig
+  - libxcb
+
+sources:
+  - https://github.com/alacritty/alacritty
+
+environment:
+  PATH: /home/build/.cargo/bin:/usr/bin/
+
+tasks:
+  - rustup: |
+      curl https://sh.rustup.rs -sSf | sh -s -- -y --default-toolchain stable --profile minimal
+  - test: |
+      cd alacritty
+      cargo test
+  - rustfmt: |
+      cd alacritty
+      rustup toolchain install nightly -c rustfmt
+      cargo +nightly fmt -- --check
+  - clippy: |
+      cd alacritty
+      rustup component add clippy
+      cargo clippy --all-targets
+  - oldstable: |
+      cd alacritty
+      rustup toolchain install --profile minimal 1.43.1
+      cargo +1.43.1 test
+  - feature-wayland: |
+      cd alacritty/alacritty
+      cargo +1.43.1 test --no-default-features --features=wayland
+  - feature-x11: |
+      cd alacritty/alacritty
+      cargo +1.43.1 test --no-default-features --features=x11
diff --git a/.builds/rustfmt.yml b/.builds/rustfmt.yml
deleted file mode 100644
index 52836217..00000000
--- a/.builds/rustfmt.yml
+++ /dev/null
@@ -1,10 +0,0 @@
-image: archlinux
-sources:
-  - https://github.com/alacritty/alacritty
-tasks:
-  - rustup: |
-      curl https://sh.rustup.rs -sSf | sh -s -- -y --profile minimal --default-toolchain none
-      $HOME/.cargo/bin/rustup toolchain install nightly -c rustfmt
-  - rustfmt: |
-      cd alacritty
-      $HOME/.cargo/bin/cargo fmt -- --check