From d319f2b257596bfb434cad8ccd2854953b903ad4 Mon Sep 17 00:00:00 2001
From: Atul Bhosale <atul1bhosale@gmail.com>
Date: Fri, 6 Sep 2019 22:57:02 +0530
Subject: [PATCH] Use the latest toolchain with rustfmt available if rustfmt is
 unavailable on the latest nightly

---
 .travis.yml | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 260a75381..9664ed9ce 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,8 +18,14 @@ matrix:
     - name: fmt
       rust: nightly
       os: linux
-      before_script:
-        - rustup component add rustfmt
+      before_script: |
+        if ! rustup component add rustfmt; then
+          target=`curl https://rust-lang.github.io/rustup-components-history/x86_64-unknown-linux-gnu/rustfmt`;
+          echo "'rustfmt' is unavailable on the toolchain 'nightly', use the toolchain 'nightly-$target' instead";
+          rustup toolchain install nightly-$target;
+          rustup default nightly-$target;
+          rustup component add rustfmt;
+        fi
       script:
         - cargo fmt --all -- --check