Install new version of cabal-install in travis.

Author: Philipp Schuster

.travis.yml

@@ -1,16 +1,74 @@
-language: haskell
-ghc: 7.8
-notifications:
-  email: false
+# This file has been generated -- see https://github.com/hvr/multi-ghc-travis
+language: c
+sudo: false
+
+cache:
+  directories:
+    - $HOME/.cabsnap
+    - $HOME/.cabal/packages
+
+before_cache:
+  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/build-reports.log
+  - rm -fv $HOME/.cabal/packages/hackage.haskell.org/00-index.tar
+
+matrix:
+  include:
+    - env: CABALVER=1.24 GHCVER=7.8.4
+      compiler: ": #GHC 7.8.4"
+      addons: {apt: {packages: [cabal-install-1.24,ghc-7.8.4,alex-3.1.7,happy-1.19.5], sources: [hvr-ghc]}}
+    - env: CABALVER=1.24 GHCVER=7.10.1
+      compiler: ": #GHC 7.10.1"
+      addons: {apt: {packages: [cabal-install-1.24,ghc-7.10.1,alex-3.1.7,happy-1.19.5], sources: [hvr-ghc]}}
+    - env: CABALVER=1.24 GHCVER=8.0.1
+      compiler: ": #GHC 8.0.1"
+      addons: {apt: {packages: [cabal-install-1.24,ghc-8.0.1,alex-3.1.7,happy-1.19.5], sources: [hvr-ghc]}}
+
 before_install:
-  - cabal install alex happy cpphs
-  - cp ~/.cabal/bin/cpphs ./
-  - cp ~/.cabal/bin/alex ./
-  - cp ~/.cabal/bin/happy ./
+ - unset CC
+ - export PATH=/opt/ghc/$GHCVER/bin:/opt/cabal/$CABALVER/bin:/opt/alex/3.1.7/bin:/opt/happy/1.19.5/bin:$PATH
+
 install:
-  - cabal sandbox init
-  - cabal install --enable-tests
+ - cabal --version
+ - echo "$(ghc --version) [$(ghc --print-project-git-commit-id 2> /dev/null || echo '?')]"
+ - if [ -f $HOME/.cabal/packages/hackage.haskell.org/00-index.tar.gz ];
+   then
+     zcat $HOME/.cabal/packages/hackage.haskell.org/00-index.tar.gz >
+          $HOME/.cabal/packages/hackage.haskell.org/00-index.tar;
+   fi
+ - travis_retry cabal update -v
+ - sed -i 's/^jobs:/-- jobs:/' ${HOME}/.cabal/config
+ - cabal install --only-dependencies --enable-tests --enable-benchmarks --dry -v > installplan.txt
+ - sed -i -e '1,/^Resolving /d' installplan.txt; cat installplan.txt
+
+# check whether current requested install-plan matches cached package-db snapshot
+ - if diff -u installplan.txt $HOME/.cabsnap/installplan.txt;
+   then
+     echo "cabal build-cache HIT";
+     rm -rfv .ghc;
+     cp -a $HOME/.cabsnap/ghc $HOME/.ghc;
+     cp -a $HOME/.cabsnap/lib $HOME/.cabsnap/share $HOME/.cabsnap/bin $HOME/.cabal/;
+   else
+     echo "cabal build-cache MISS";
+     rm -rf $HOME/.cabsnap;
+     mkdir -p $HOME/.ghc $HOME/.cabal/lib $HOME/.cabal/share $HOME/.cabal/bin;
+     cabal install --only-dependencies --enable-tests --enable-benchmarks;
+   fi
+
+# snapshot package-db on cache miss
+ - if [ ! -d $HOME/.cabsnap ];
+   then
+      echo "snapshotting package-db to build-cache";
+      mkdir $HOME/.cabsnap;
+      cp -a $HOME/.ghc $HOME/.cabsnap/ghc;
+      cp -a $HOME/.cabal/lib $HOME/.cabal/share $HOME/.cabal/bin installplan.txt $HOME/.cabsnap/;
+   fi
+
+# Here starts the actual work to be performed for the package under test;
+# any command which exits with a non-zero exit code causes the build to fail.
 script:
-  - cabal configure --enable-tests
-  - cabal build
-  - ./dist/build/test/test
+ - if [ -f configure.ac ]; then autoreconf -i; fi
+ - cabal configure --enable-tests --enable-benchmarks -v2  # -v2 provides useful information for debugging
+ - cabal build   # this builds all libraries and executables (including tests/benchmarks)
+ - cabal test
+
+# EOF

haskell-names.cabal

@@ -11,6 +11,7 @@ Homepage:               http://documentup.com/haskell-suite/haskell-names
 Stability:              Experimental
 Build-Type:             Simple
 Cabal-Version:          >= 1.10
+Tested-With:            GHC == 7.8.4, GHC == 7.10.1, GHC == 8.0.1
 
 extra-source-files:
   README.md
@@ -243,7 +244,9 @@ Library
     , aeson >= 0.8.0.2 && < 0.12
     , bytestring >= 0.10.4.0 && < 0.11
     , data-lens-light >= 0.1.2.1 && < 0.2
-    , traverse-with-class >= 0.2.0.3 && < 0.3
+              , traverse-with-class >= 0.2.0.3 && < 0.3
+  if impl(ghc <= 7.8)
+    Build-depends: tagged >= 0.8.4 && < 0.9
   Hs-source-dirs:       src
   Ghc-options:          -Wall -fno-warn-name-shadowing