diff options
Diffstat (limited to 'eclass/haskell-cabal.eclass')
| -rw-r--r-- | eclass/haskell-cabal.eclass | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/eclass/haskell-cabal.eclass b/eclass/haskell-cabal.eclass index 2e77bc648b16..bb73c0e4881d 100644 --- a/eclass/haskell-cabal.eclass +++ b/eclass/haskell-cabal.eclass @@ -661,6 +661,23 @@ cabal-is-dummy-lib() { return 1 } +# @FUNCTION: cabal-check-cache +# @DESCRIPTION: +# Check the state of the GHC cache by running 'ghc-pkg check' and looking +# for the string "WARNING: cache is out of date". If the string is not found, +# the cache is considered valid and the function returns 0. If it is found, +# the cache is considered invalid and the function returns 1. +cabal-check-cache() { + if $(ghc-getghcpkg) check 2>&1 \ + | grep -q 'WARNING: cache is out of date' + then + ewarn 'GHC cache is out of date!' + return 1 + else + return 0 + fi +} + # exported function: check if cabal is correctly installed for # the currently active ghc (we cannot guarantee this with portage) haskell-cabal_pkg_setup() { @@ -672,6 +689,13 @@ haskell-cabal_pkg_setup() { fi if cabal-is-dummy-lib; then einfo "${P} is included in ghc-${CABAL_CORE_LIB_GHC_PV}, nothing to install." + else + # bug 916785 + if ! cabal-check-cache; then + # avoid running ghc-recache-db so as not to set _GHC_RECACHE_CALLED + einfo "Recaching GHC package DB" + $(ghc-getghcpkg) recache + fi fi } @@ -711,6 +735,8 @@ haskell-cabal_src_prepare() { } haskell-cabal_src_configure() { + einfo "GHC version: $(ghc-version) $(ghc-pm-version)" + cabal-is-dummy-lib && return pushd "${S}" > /dev/null || die |