Add a "predeploy" Travis build for PRs and master

.travis.yml

@@ -38,3 +38,7 @@ jobs:
   - env: MODE=test RESOLVER=lts-10.0           # GHC 8.2
   - env: MODE=test RESOLVER=nightly-2018-03-23 # GHC 8.4
   - env: MODE=test RESOLVER=nightly
+
+  - stage: predeploy
+    if: branch=master
+    env: MODE=predeploy

.travis/predeploy

@@ -0,0 +1,57 @@
+#!/usr/bin/env bash
+
+function msg {
+  pkg=$1
+  file=$2
+  note=$3
+  if [[ -z "$note" ]]; then
+    echo "${pkg}: package version mismatch in ${file}" >&2
+  else
+    echo "${pkg}: package version mismatch in ${file} (${note})" >&2
+  fi
+}
+
+fail=false
+
+for pkg in concurrency dejafu hunit-dejafu tasty-dejafu; do
+  ver=`grep '^version:' ${pkg}/${pkg}.cabal | sed 's/^version: *//'`
+
+  if ! grep -q -E "tag: *${pkg}-${ver}" $pkg/$pkg.cabal; then
+    msg $pkg $pkg/$pkg.cabal
+    fail=true
+  fi
+
+  if ! grep -q "^${ver}" $pkg/CHANGELOG.rst; then
+    msg $pkg $pkg/CHANGELOG.rst "missing header"
+    fail=true
+  fi
+
+  if ! grep -q -E "Git.*${pkg}-${ver}" $pkg/CHANGELOG.rst; then
+    msg $pkg $pkg/CHANGELOG.rst "missing git tag"
+    fail=true
+  fi
+
+  if ! grep -q -E "Hackage.*${pkg}-${ver}" $pkg/CHANGELOG.rst; then
+    msg $pkg $pkg/CHANGELOG.rst "missing hackage link"
+    fail=true
+  fi
+
+  if ! grep -q -E "${pkg}.*${ver}" README.markdown; then
+    msg $pkg README.markdown
+    fail=true
+  fi
+
+  if ! grep -q -E "${pkg}.*${ver}" doc/getting_started.rst; then
+    msg $pkg doc/getting_started.rst
+    fail=true
+  fi
+
+  if git grep -q unreleased $pkg; then
+    echo "${pkg}: 'unreleased' appears in source" >&2
+    fail=true
+  fi
+done
+
+if $fail; then
+  exit 1
+fi