Merge pull request #1534 from Xanewok/travis-fix-rustfmt

Travis: Pin nightly version for Rustfmt

Author: Xanewok

.travis.yml

@@ -5,7 +5,9 @@ cache:
 rust:
   - nightly
 install:
-  - rustup component add rustfmt
+  # Use last well-known nightly for Rustfmt
+  - rustup toolchain install nightly-2019-08-01
+  - rustup component add rustfmt --toolchain nightly-2019-08-01
   # Required for Racer autoconfiguration
   - rustup component add rust-src
   - rustup component add rust-analysis
@@ -19,18 +21,18 @@ matrix:
       if: commit_message =~ /(?i:^update.*\b(clippy)\b)/
 script:
   - |
-    if [ ${CLIPPY} = true ]; then
+    if [ "${CLIPPY}" = true ]; then
       cargo build -v --features "clippy"
       cargo test -v --features "clippy"
     else
       # Since the rls-* subcrates use crates.io-based dependencies of themselves it
       # makes sense to test them in isolation rather than just RLS itself
-      (cd rls-analysis && cargo test -v && cargo fmt -- --check)
-      (cd rls-data && cargo test -v && cargo fmt -- --check)
-      (cd rls-rustc && cargo test -v && cargo fmt -- --check)
-      (cd rls-span && cargo test -v && cargo fmt -- --check)
-      (cd rls-vfs && cargo test -v && cargo fmt -- --check)
-      cargo fmt -- --check
+      (cd rls-analysis && cargo test -v && cargo +nightly-2019-08-01 fmt -- --check)
+      (cd rls-data && cargo test -v && cargo +nightly-2019-08-01 fmt -- --check)
+      (cd rls-rustc && cargo test -v && cargo +nightly-2019-08-01 fmt -- --check)
+      (cd rls-span && cargo test -v && cargo +nightly-2019-08-01 fmt -- --check)
+      (cd rls-vfs && cargo test -v && cargo +nightly-2019-08-01 fmt -- --check)
+      cargo +nightly-2019-08-01 fmt -- --check
       cargo build -v
       cargo test -v
       cargo test test_tooltip_std -- --ignored