From 9add5b561406cde1245f150deb3d2625e701399c Mon Sep 17 00:00:00 2001
From: Alec Theriault <alec.theriault@gmail.com>
Date: Fri, 20 Jul 2018 00:04:03 -0700
Subject: Add HEAD.hackage overlay (#887)

* Add HEAD.hackage overlay

* Add HCPKG variable
---
 .travis.yml | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/.travis.yml b/.travis.yml
index 1e1a989d..2bcb301a 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -24,14 +24,18 @@ before_cache:
   - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar
   - rm -fv $HOME/.cabal/packages/hackage.haskell.org/01-index.tar.idx
 
+  - rm -rfv $HOME/.cabal/packages/head.hackage
+
 matrix:
   include:
     - compiler: "ghc-head"
+      env: GHCHEAD=true
     # env: TEST=--disable-tests BENCH=--disable-benchmarks
       addons: {apt: {packages: [ghc-ppa-tools,cabal-install-head,ghc-head], sources: [hvr-ghc]}}
 
 before_install:
  - HC=${CC}
+ - HCPKG=${HC/ghc/ghc-pkg}
  - unset CC
  - PATH=/opt/ghc/bin:/opt/ghc-ppa-tools/bin:$PATH
  - PKGNAME='haddock'
@@ -41,10 +45,29 @@ install:
  - echo "$(${HC} --version) [$(${HC} --print-project-git-commit-id 2> /dev/null || echo '?')]"
  - BENCH=${BENCH---enable-benchmarks}
  - TEST=${TEST---enable-tests}
+ - GHCHEAD=${GHCHEAD-false}
  - travis_retry cabal update -v
  - sed -i 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config
  - rm -fv cabal.project.local
  - rm -f cabal.project.freeze
+ # Overlay Hackage Package Index for GHC HEAD: https://github.com/hvr/head.hackage
+ - |
+   if $GHCHEAD; then
+     sed -i 's/-- allow-newer: .*/allow-newer: *:base/' ${HOME}/.cabal/config
+     for pkg in $($HCPKG list --simple-output); do pkg=$(echo $pkg | sed 's/-[^-]*$//'); sed -i "s/allow-newer: /allow-newer: *:$pkg, /" ${HOME}/.cabal/config; done
+
+     echo 'repository head.hackage'                                                        >> ${HOME}/.cabal/config
+     echo '   url: http://head.hackage.haskell.org/'                                       >> ${HOME}/.cabal/config
+     echo '   secure: True'                                                                >> ${HOME}/.cabal/config
+     echo '   root-keys: 07c59cb65787dedfaef5bd5f987ceb5f7e5ebf88b904bbd4c5cbdeb2ff71b740' >> ${HOME}/.cabal/config
+     echo '              2e8555dde16ebd8df076f1a8ef13b8f14c66bad8eafefd7d9e37d0ed711821fb' >> ${HOME}/.cabal/config
+     echo '              8f79fd2389ab2967354407ec852cbe73f2e8635793ac446d09461ffb99527f6e' >> ${HOME}/.cabal/config
+     echo '   key-threshold: 3'                                                            >> ${HOME}/.cabal.config
+
+     grep -Ev -- '^\s*--' ${HOME}/.cabal/config | grep -Ev '^\s*$'
+
+     cabal new-update head.hackage -v
+   fi
  - travis_retry cabal new-build -w ${HC} ${TEST} ${BENCH} --dep -j2 --allow-newer --constraint 'setup.Cabal installed' all
  - travis_retry cabal new-build -w ${HC} --disable-tests --disable-benchmarks --dep -j2 --allow-newer --constraint 'setup.Cabal installed' all
 
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