[commit: ghc] wip/fix-docs: circleci: Install sphinx (320f703)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : wip/fix-docs
Link       : http://ghc.haskell.org/trac/ghc/changeset/320f70332e4f74500b7501dcfe49de3870094101/ghc

>---------------------------------------------------------------

commit 320f70332e4f74500b7501dcfe49de3870094101
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Sat Aug 4 00:21:58 2018 -0400

    circleci: Install sphinx


>---------------------------------------------------------------

320f70332e4f74500b7501dcfe49de3870094101
 .circleci/prepare-system.sh | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/.circleci/prepare-system.sh b/.circleci/prepare-system.sh
index c9320ed..fda2f64 100755
--- a/.circleci/prepare-system.sh
+++ b/.circleci/prepare-system.sh
@@ -42,6 +42,12 @@ case "$(uname)" in
         fail "TARGET=$target not supported"
       fi
     else
+      if [[ -e yum ]]; then
+        yum install sphinx-build
+      else
+        sudo apt-get update -qq
+        sudo apt-get install -qy python3-sphinx
+      fi
       cabal update
       cabal install --reinstall hscolour
       sudo ln -s /home/ghc/.cabal/bin/HsColour /usr/local/bin/HsColour || true
@@ -55,6 +61,7 @@ case "$(uname)" in
     # does not work.
     brew upgrade python
     brew install ghc cabal-install ncurses gmp
+    pip3 install sphinx
     cabal update
     cabal install --reinstall alex happy haddock hscolour --index-state=$hackage_index_state
     # put them on the $PATH, don't fail if already installed