Travis: attempt to speed up esy and MacOS builds

.travis.yml

@@ -37,13 +37,11 @@ matrix:
 
 cache:
   directories:
-  - /usr/local/Cellar/opam
-  - /usr/local/Cellar/tidy-html5
-  - $HOME/travis/.opam
-  - $HOME/travis/.esy
-  - $HOME/travis/.nvm
-  - ./_opam
-  - ./_build/default
+    - $HOME/.opam
+    - $HOME/.esy
+    - $HOME/.nvm
+    - ./_opam
+    - ./_build/default
 
 install:
   - ./test/ci/install-deps.sh

test/ci/install-deps.sh

@@ -5,16 +5,11 @@ set -e
 
 # Install Tidy everywhere
 case $TRAVIS_OS_NAME in
-"linux")
-  sudo add-apt-repository -y ppa:robert7/tidy-html5
-  sudo apt-get update
-  sudo apt-get install tidy
-;;
-
-"osx")
-  brew install tidy-html5
-  brew link tidy-html5
-;;
+  "linux")
+    sudo add-apt-repository -y ppa:robert7/tidy-html5
+    sudo apt-get update
+    sudo apt-get install tidy
+  ;;
 esac
 
 # Install esy or opam

test/html/test.ml

@@ -35,14 +35,14 @@ module Env = struct
     | `cases when from_root -> "test/html/cases"
     | `cases -> "cases"
 
-  let running_in_travis =
-    match Sys.getenv "TRAVIS" with
-    | "true" -> true
+  let running_in_travis_on_linux =
+    match Sys.getenv "TRAVIS_OS_NAME" with
+    | "linux" -> true
     | _ -> false
     | exception Not_found -> false
 
   let init () = begin
-    if running_in_travis && not Tidy.is_present_in_path then begin
+    if running_in_travis_on_linux && not Tidy.is_present_in_path then begin
       Alcotest.failf "Could not find `tidy` in $PATH in a CI environment"
     end;