use credo in tests

.credo.exs

@@ -0,0 +1,64 @@
+%{
+  configs: [
+    %{
+      name: "default",
+      check_for_updates: false,
+      files: %{
+        included: ["lib/", "src/", "web/", "apps/", "test/"],
+        excluded: [~r"/_build/", ~r"/deps/"]
+      },
+      checks: [
+        {Credo.Check.Consistency.ExceptionNames},
+        {Credo.Check.Consistency.LineEndings},
+        {Credo.Check.Consistency.SpaceAroundOperators},
+        {Credo.Check.Consistency.SpaceInParentheses},
+        {Credo.Check.Consistency.TabsOrSpaces},
+
+        {Credo.Check.Design.AliasUsage, false},
+
+        {Credo.Check.Design.DuplicatedCode, excluded_macros: [:schema, :setup, :test]},
+
+        {Credo.Check.Design.TagTODO, exit_status: 0},
+        {Credo.Check.Design.TagFIXME, exit_status: 0},
+
+        {Credo.Check.Readability.FunctionNames},
+        {Credo.Check.Readability.LargeNumbers},
+        {Credo.Check.Readability.MaxLineLength, priority: :low, max_length: 90, exit_status: 0},
+        {Credo.Check.Readability.ModuleAttributeNames},
+        {Credo.Check.Readability.ModuleDoc, false},
+        {Credo.Check.Readability.ModuleNames},
+        {Credo.Check.Readability.ParenthesesInCondition},
+        {Credo.Check.Readability.PredicateFunctionNames},
+        {Credo.Check.Readability.TrailingBlankLine},
+        {Credo.Check.Readability.TrailingWhiteSpace},
+        {Credo.Check.Readability.VariableNames},
+
+        {Credo.Check.Refactor.ABCSize},
+        {Credo.Check.Refactor.CondStatements},
+        {Credo.Check.Refactor.FunctionArity},
+        {Credo.Check.Refactor.MatchInCondition},
+        {Credo.Check.Refactor.PipeChainStart},
+        {Credo.Check.Refactor.CyclomaticComplexity},
+        {Credo.Check.Refactor.NegatedConditionsInUnless},
+        {Credo.Check.Refactor.NegatedConditionsWithElse},
+        {Credo.Check.Refactor.Nesting},
+        {Credo.Check.Refactor.UnlessWithElse},
+
+        {Credo.Check.Warning.IExPry},
+        {Credo.Check.Warning.IoInspect},
+        {Credo.Check.Warning.NameRedeclarationByAssignment},
+        {Credo.Check.Warning.NameRedeclarationByCase},
+        {Credo.Check.Warning.NameRedeclarationByDef},
+        {Credo.Check.Warning.NameRedeclarationByFn},
+        {Credo.Check.Warning.OperationOnSameValues},
+        {Credo.Check.Warning.BoolOperationOnSameValues},
+        {Credo.Check.Warning.UnusedEnumOperation},
+        {Credo.Check.Warning.UnusedKeywordOperation},
+        {Credo.Check.Warning.UnusedListOperation},
+        {Credo.Check.Warning.UnusedStringOperation},
+        {Credo.Check.Warning.UnusedTupleOperation},
+        {Credo.Check.Warning.OperationWithConstantResult},
+      ]
+    }
+  ]
+}

.travis.yml

@@ -9,4 +9,4 @@ sudo: false
 before_script:
   - mix deps.get --only test
 script:
-  - mix test
+  - ./bin/checks.sh

bin/checks.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+MIX_ENV=test mix credo --strict && MIX_ENV=test mix test

bin/increment-version

@@ -0,0 +1,89 @@
+#!/bin/bash
+
+# Based on https://github.com/fmahnke/shell-semver
+# The MIT License (MIT)
+# Copyright (c) 2014 Fritz Mahnke
+# Increment a version string using Semantic Versioning (SemVer) terminology.
+# Parse command line options.
+
+
+while getopts ":Mmp" Option
+do
+  case $Option in
+    M ) major=true;;
+    m ) minor=true;;
+    p ) patch=true;;
+  esac
+done
+
+shift $(($OPTIND - 1))
+
+STAGED_COUNT=$(git diff --cached --numstat | wc -l)
+UNSTAGED_COUNT=$(git diff --numstat | wc -l)
+
+## TODO check we are on master
+if [ $STAGED_COUNT -ne "0" ]; then
+    echo "you have staged changes. Aborting".
+    exit 1
+fi
+
+if [ $UNSTAGED_COUNT -ne "0" ]; then
+    echo "you have unstaged changes. Aborting".
+    exit 1
+fi
+
+version="$(mix run --no-compile --no-start -e ":io.format('~s', [PrometheusPhoenix.Mixfile.project()[:version]])")"
+
+echo "Old version: ${version}"
+
+# Build array from version string.
+oa=( ${version//./ } )
+a=( ${version//./ } )
+
+# If version string is missing or has the wrong number of members, show usage message.
+
+if [ ${#a[@]} -ne 3 ]
+then
+  echo "usage: $(basename $0) [-Mmp] TAG_MESSAGE(optional)"
+  exit 1
+fi
+
+# Increment version numbers as requested.
+
+if [ ! -z $major ]
+then
+  ((a[0]++))
+  a[1]=0
+  a[2]=0
+fi
+
+if [ ! -z $minor ]
+then
+  ((a[1]++))
+  a[2]=0
+fi
+
+if [ ! -z $patch ]
+then
+  ((a[2]++))
+fi
+
+new_version="${a[0]}.${a[1]}.${a[2]}"
+
+echo "New version: ${new_version}"
+
+sed -i s/\"${oa[0]}\.${oa[1]}\.${oa[2]}\"/\"${a[0]}\.${a[1]}\.${a[2]}\"/g mix.exs
+sed -i s/\~\>\ ${oa[0]}\.${oa[1]}/\~\>\ ${a[0]}\.${a[1]}/g README.md
+
+git add mix.exs
+git add README.md
+git add doc
+git commit -m "Bump to v${new_version}"
+
+TAG_MESSAGE=${1:-"New version: v${new_version}"}
+
+git tag -a "v${new_version}" -m "${TAG_MESSAGE}"
+git push origin master
+git push origin "v${new_version}"
+
+mix hex.publish

bin/pre-commit.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+if [ $# -eq 0 ]; then
+    git stash -q --keep-index
+    ./bin/checks.sh
+    RESULT=$?
+    git stash pop -q
+    [ $RESULT -ne 0 ] && exit 1
+    exit 0
+else
+    if [ $1 = "install" ]; then
+        ln -s `pwd`/bin/pre-commit.sh .git/hooks/pre-commit
+    elif [ $1 = "uninstall" ]; then
+        rm .git/hooks/pre-commit
+    else
+        echo "Unknown argument $1"
+        exit 1
+    fi
+fi