Fix i386 CI releases

The i386 CI releases were still using x86_64 platforms for building the
output binaries, as a result the produced binaries did not work properly
on i386 systems.

The maximum time of 50 minutes was exceeded when Alacritty tries to build
for all Linux platforms, this was because it was effectively compiling
Alacritty from scratch four times.

By making use of the previous build artifacts, it's possible to cut this
down to two compiles using the `--no-build` option of `cargo-deb`.

.travis.yml

@@ -18,6 +18,11 @@ rust:
 
 matrix:
   fast_finish: true
+  include:
+    - if: tag IS present
+      os: linux
+      rust: stable
+      env: ARCH=i386
   allow_failures:
     - rust: nightly
     - os: windows

ci/before_deploy.sh

@@ -24,32 +24,36 @@ name="Alacritty-${TRAVIS_TAG}"
 if [ "$TRAVIS_OS_NAME" == "osx" ]; then
     make dmg
     mv "./target/release/osx/Alacritty.dmg" "./target/deploy/${name}.dmg"
-elif [ "$TRAVIS_OS_NAME" == "linux" ]; then
-    cargo install cargo-deb
+elif [ "$TRAVIS_OS_NAME" == "linux" ] && [ "$ARCH" != "i386" ]; then
+    docker pull undeadleech/alacritty-ubuntu
 
     # x86_64
-    docker pull undeadleech/alacritty-ubuntu
     docker run -v "$(pwd):/source" undeadleech/alacritty-ubuntu \
         /root/.cargo/bin/cargo build --release --manifest-path /source/Cargo.toml
-    sudo chown -R $USER:$USER "./target"
     tar -cvzf "./target/deploy/${name}-x86_64.tar.gz" -C "./target/release/" "alacritty"
 
     # x86_64 deb
-    DEB=$(cargo deb --no-build)
-    mv "$DEB" "./target/deploy/${name}_amd64.deb"
+    docker run -v "$(pwd):/source" undeadleech/alacritty-ubuntu \
+        sh -c "cd /source && \
+        /root/.cargo/bin/cargo deb --no-build --output ./target/deploy/${name}_amd64.deb"
 
-    rm -rf "./target/release"
+    # Make sure all files can be uploaded without permission errors
+    sudo chown -R $USER:$USER "./target"
+elif [ "$TRAVIS_OS_NAME" == "linux" ] && [ "$ARCH" == "i386" ]; then
+    docker pull undeadleech/alacritty-ubuntu-i386
 
     # i386
-    docker pull undeadleech/alacritty-ubuntu-i386
-    docker run -v "$(pwd):/source" undeadleech/alacritty-ubuntu \
+    docker run -v "$(pwd):/source" undeadleech/alacritty-ubuntu-i386 \
         /root/.cargo/bin/cargo build --release --manifest-path /source/Cargo.toml
-    sudo chown -R $USER:$USER "./target"
     tar -cvzf "./target/deploy/${name}-i386.tar.gz" -C "./target/release/" "alacritty"
 
     # i386 deb
-    DEB=$(cargo deb --no-build)
-    mv "$DEB" "./target/deploy/${name}_i386.deb"
+    docker run -v "$(pwd):/source" undeadleech/alacritty-ubuntu-i386 \
+        sh -c "cd /source && \
+        /root/.cargo/bin/cargo deb --no-build --output ./target/deploy/${name}_i386.deb"
+
+    # Make sure all files can be uploaded without permission errors
+    sudo chown -R $USER:$USER "./target"
 elif [ "$TRAVIS_OS_NAME" == "windows" ]; then
     mv "./target/release/alacritty.exe" "./target/deploy/${name}.exe"
     mv "./target/release/winpty-agent.exe" "./target/deploy/winpty-agent.exe"

ci/i386/Dockerfile

@@ -6,3 +6,4 @@ RUN apt-get update && apt-get install -y cmake libfreetype6-dev libfontconfig1-d
 
 RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
 RUN /root/.cargo/bin/rustup default stable-i686-unknown-linux-gnu
+RUN /root/.cargo/bin/cargo install cargo-deb

ci/x86_64/Dockerfile

@@ -5,3 +5,4 @@ ENV USER root
 RUN apt-get update && apt-get install -y cmake libfreetype6-dev libfontconfig1-dev curl
 
 RUN curl https://sh.rustup.rs -sSf | sh -s -- -y
+RUN /root/.cargo/bin/cargo install cargo-deb