[commit: ghc] wip/fix-docs: circleci: Install sphinx (8a7f813)

[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/8a7f8136b1868a5f5dbb281bf395d4ca3de3f82c/ghc

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

commit 8a7f8136b1868a5f5dbb281bf395d4ca3de3f82c
Author: Ben Gamari <ben at smart-cactus.org>
Date:   Sat Aug 4 00:21:58 2018 -0400

    circleci: Install sphinx


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

8a7f8136b1868a5f5dbb281bf395d4ca3de3f82c
 .circleci/prepare-system.sh | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.circleci/prepare-system.sh b/.circleci/prepare-system.sh
index c9320ed..488673e 100755
--- a/.circleci/prepare-system.sh
+++ b/.circleci/prepare-system.sh
@@ -42,6 +42,11 @@ case "$(uname)" in
         fail "TARGET=$target not supported"
       fi
     else
+      if [[ -e yum ]]; then
+        yum install sphinx-build
+      else
+        sudo apt-get install -qy sphinx-doc
+      fi
       cabal update
       cabal install --reinstall hscolour
       sudo ln -s /home/ghc/.cabal/bin/HsColour /usr/local/bin/HsColour || true
@@ -55,6 +60,7 @@ 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