use stable, rustfmt-preview and ignore rustfmt errors

Author: japaric

.travis.yml

@@ -12,37 +12,26 @@ matrix:
   include:
     # Nightly, for testing
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=Atmel
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=Freescale
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=Fujitsu
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=Holtek
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=Nordic
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=Nuvoton
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=NXP
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=SiliconLabs
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=Spansion
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=STMicro
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=Toshiba
-      rust: beta
 
     - env: TARGET=x86_64-unknown-linux-gnu VENDOR=OTHER
       rust: nightly

ci/install.sh

@@ -19,14 +19,7 @@ main() {
            --git japaric/cross \
            --tag $tag
 
-    if [ ! -z ${VENDOR-} ]; then
-        curl -LSfs https://japaric.github.io/trust/install.sh | \
-            sh -s -- \
-               --crate rustfmt \
-               --force \
-               --git japaric/rustfmt-bin \
-               --tag v0.8.4-20170605
-    fi
+    rustup component add rustfmt-preview
 }
 
 main

ci/script.sh

@@ -14,7 +14,8 @@ test_svd() {
 
     mv lib.rs src/lib.rs
 
-    rustfmt src/lib.rs
+    # ignore rustfmt errors
+    rustfmt src/lib.rs || true
     popd
 
     cargo check --manifest-path $td/Cargo.toml