From 0971aac7cd29e073dddfe0cdbf38eb0a9304adcb Mon Sep 17 00:00:00 2001
From: Behnam Esfahbod <behnam@zwnj.org>
Date: Sun, 10 Sep 2017 17:45:59 -0700
Subject: [PATCH] [travis] Enable cache for $HOME/.cargo/bin/

This should accelerate the `cargo install mdbook` step under `install`,
which is currently called on all linux+nightly setups.
---
 .travis.yml | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index b925208bc..c2f7ca36c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -6,6 +6,10 @@ dist: trusty
 git:
   depth: 1
 
+cache:
+  directories:
+    - $HOME/.cargo/bin/
+
 matrix:
   include:
     - env: TARGET=x86_64-unknown-linux-gnu
@@ -22,7 +26,7 @@ matrix:
            ALT=i686-unknown-linux-gnu
       rust: nightly
       install:
-        - cargo install mdbook
+        - mdbook --help || cargo install mdbook --force
       script:
         - cargo test
         - cargo doc --no-deps
-- 
2.30.2