Tell Travis to cache Cargo intermediate build products.

The CI builds were using a lot of time downloading and building crates.
8 years ago · 951ff3e6fc
1 changed files with 4 additions and 0 deletions
--- a/.travis.yml
+++ b/.travis.yml
@ -4,3 +4,7 @@ rust:
  - beta
  - nightly
 script: ./test-all.sh
+cache:
+  - cargo
+  - directories:
+    - src/tools/target