Update release script (#2631)

… mostly to remove the dependence on Hydra

Author: Gabriella439

.travis-functions.sh

@@ -1,41 +1,37 @@
 #! /usr/bin/env nix-shell
-#! nix-shell -i bash --packages bash cabal-install cachix curl git skopeo
+#! nix-shell -i bash --packages bash cabal-install cachix git skopeo ghc
 
 set -eux
 
-JOBSET=master
-
-. .travis-functions.sh
+get_cabal_version() {
+  grep '^Version: ' < "$1/$1.cabal" | sed -e 's/^Version:  *//g';
+}
 
 function release {
   NAME="$1"
   VERSION="$(get_cabal_version "${NAME}")"
 
   pushd "${NAME}"
   cabal sdist
-  cabal upload --publish "../dist-newstyle/sdist/${NAME}-${VERSION}.tar.gz"
-  git clean --force -d -x .
+  cabal upload --publish "../dist-newstyle/sdist/${NAME}-${VERSION}.tar.gz" || :
   popd
 
-  nix build --file ./default.nix "${NAME}"
-
-  cachix push dhall result
+  BUILD="$(nix build --file ./default.nix "${NAME}" --print-out-paths)"
 
-  curl --location --output "${NAME}-${VERSION}-x86_64-linux.tar.bz2" "https://hydra.dhall-lang.org/job/dhall-haskell/${JOBSET}/tarball-${NAME}/latest/download/1/${NAME}.tar.bz2"
+  cachix push dhall "${BUILD}"
 
-  DOCKER_ARCHIVE="docker-image-${NAME}.tar.gz"
-
-  curl --location --remote-name "https://hydra.dhall-lang.org/job/dhall-haskell/${JOBSET}/image-${NAME}/latest/download/1/${DOCKER_ARCHIVE}"
+  DOCKER_ARCHIVE_DIRECTORY="$(nix build --file ./release.nix "image-${NAME}" --print-out-paths)"
+  DOCKER_ARCHIVE="${DOCKER_ARCHIVE_DIRECTORY}/docker-image-${NAME}.tar.gz"
 
   skopeo copy --insecure-policy --dest-creds="gabriel439:$(< dockerPassword.txt)" "docker-archive:${DOCKER_ARCHIVE}" "docker://dhallhaskell/${NAME}"
 
   skopeo copy --insecure-policy --dest-creds="gabriel439:$(< dockerPassword.txt)" "docker-archive:${DOCKER_ARCHIVE}" "docker://dhallhaskell/${NAME}:${VERSION}"
-
-  rm "${DOCKER_ARCHIVE}"
 }
 
 git submodule update
 
+git clean --force -d -x -- dhall*
+
 for package in dhall-lsp-server dhall-openapi dhall-toml dhall-csv dhall-json dhall-yaml dhall-bash dhall-nix dhall-nixpkgs dhall-docs dhall; do
   release "${package}"
 done