build: Add release automation script

Add a script for generating a release.

Note, meson's project version is updated only once, either at the
begin of a RC phase or directly when there was no RC.

Signed-off-by: Daniel Wagner <dwagner@suse.de>

diff --git a/release.sh b/release.sh
new file mode 100755 (executable)
index 0000000..2199eac
--- /dev/null
+++ b/release.sh
@@ -0,0 +1,84 @@
+#!/bin/bash
+
+usage() {
+    echo "release.sh: VERSION"
+    echo ""
+    echo "The script does all necessary steps to create a new release."
+    echo ""
+    echo "Note: The version number needs to be exactly"
+    echo "      '^v[\d]+.[\d]+(-rc[0-9]+)?$'"
+    echo ""
+    echo "example:"
+    echo "  release.sh v2.1-rc0     # v2.1 release candidate 0 -> sets the project "
+    echo "                          # version to '1.1' and sets the tag"
+    echo "  release.sh v2.1-rc1     # v2.1 release canditate 1 -> only sets the tag"
+    echo "  release.sh v2.1         # v2.1 release -> sets the final tag"
+}
+
+VERSION=$1
+
+if [ -z "$VERSION" ] ; then
+    usage
+    exit 1
+fi
+
+new_ver=""
+rc=""
+
+re='^v([0-9]+\.[0-9]+)(-rc[0-9]+)?$'
+if [[ "$VERSION" =~ $re ]]; then
+    echo "Valid version $VERSION string"
+    new_ver=${BASH_REMATCH[1]}
+    rc=${BASH_REMATCH[2]}
+else
+    echo "Invalid version string $VERSION"
+    echo ""
+    usage
+    exit 1
+fi
+
+if [[ -n $(git status -s) ]]; then
+    echo "tree is dirty. abort."
+    exit 1
+fi
+
+if [ "$(git rev-parse --abbrev-ref HEAD)" != "master" ] ; then
+    echo "currently not on master branch. abort."
+    exit 1
+fi
+
+# update all docs
+doc_dir=""
+if [ -d "Documentation" ]; then
+    doc_dir="Documentation"
+elif [ -d "doc" ]; then
+    doc_dir="doc"
+else
+    echo "documenation directory not found"
+    exit 1
+fi
+
+./$doc_dir/update-docs.sh
+git add $doc_dir
+git commit -s -m "Regenerate all documentation" \
+              -m "Regenerate documentation for $VERSION release"
+
+# update meson.build
+old_ver=$(sed -n "0,/[ \t]\+version: /s/[ \t]\+version: '\([0-9]\+.[0-9]\+\)',$/\1/p" meson.build)
+if [ "$old_ver" != "$new_ver" ]; then
+    # Only update project version once, that is either
+    # - for the first RC phase or
+    # - for the release when there was no RC
+    sed -i -e "0,/[ \t]version: /s/\([ \t]version: \).*/\1\'$new_ver\',/" meson.build
+    git add meson.build
+fi
+
+git commit -s -m "Release $VERSION"
+git tag -s -m "Release $VERSION" "$VERSION"
+git push --dry-run origin "$VERSION"^{}:master tag "$VERSION"
+
+read -p "All good? Ready to push changes to remote? [Yy]" -n 1 -r
+echo
+if [[ $REPLY =~ ^[Yy]$ ]]; then
+    git push origin "$VERSION"^{}:master tag "$VERSION"
+fi