Add gitattributes and release.sh

.gitattributes

@@ -0,0 +1,12 @@
+* text=auto
+
+*.md diff=markdown
+*.php diff=php
+
+/.github export-ignore
+/bin export-ignore
+/tests export-ignore
+.gitattributes export-ignore
+.gitignore export-ignore
+phpunit.xml export-ignore
+psalm.xml export-ignore

bin/release.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/env bash
+
+set -e
+
+# Make sure the release tag is provided.
+if (( "$#" != 1 ))
+then
+    echo "Tag has to be provided."
+
+    exit 1
+fi
+
+RELEASE_BRANCH="master"
+CURRENT_BRANCH=$(git rev-parse --abbrev-ref HEAD)
+VERSION=$1
+
+# Make sure current branch and release branch match.
+if [[ "$RELEASE_BRANCH" != "$CURRENT_BRANCH" ]]
+then
+    echo "Release branch ($RELEASE_BRANCH) does not match the current active branch ($CURRENT_BRANCH)."
+
+    exit 1
+fi
+
+# Make sure the working directory is clear.
+if [[ ! -z "$(git status --porcelain)" ]]
+then
+    echo "Your working directory is dirty. Did you forget to commit your changes?"
+
+    exit 1
+fi
+
+# Make sure latest changes are fetched first.
+git fetch origin
+
+# Make sure that release branch is in sync with origin.
+if [[ $(git rev-parse HEAD) != $(git rev-parse origin/$RELEASE_BRANCH) ]]
+then
+    echo "Your branch is out of date with its upstream. Did you forget to pull or push any changes before releasing?"
+
+    exit 1
+fi
+
+# Always prepend with "v"
+if [[ $VERSION != v*  ]]
+then
+    VERSION="v$VERSION"
+fi
+
+# Tag PHPEnum
+git tag $VERSION
+git push origin --tags