Add blog post: LibrePCB 2.1.0 Released

build.sh

@@ -3,10 +3,23 @@
 # set shell settings (see https://sipb.mit.edu/doc/safe-shell/)
 set -eu -o pipefail
 
+HUGO_ARGS=""
+
+# Change baseURL for branches other than master. Required to get relative
+# links (like OpenGraph images) working on branches.
+BRANCH_NAME="${GITHUB_REF:-}"
+BRANCH_NAME="${BRANCH_NAME#refs/heads/}"
+BRANCH_SLUG=$(echo $BRANCH_NAME | sed -e 's/[^A-Za-z0-9_-]/_/g')
+if [[ -n "$BRANCH_SLUG" && "$BRANCH_SLUG" != "master" ]]; then
+    BASE_URL="https://librepcb.org/_branches/$BRANCH_SLUG/"
+    HUGO_ARGS+=" -b $BASE_URL"
+    echo "Overriding baseURL for branch: $BASE_URL"
+fi
+
 # Run Hugo with Docker
 docker run -t --rm -u `id -u`:`id -g` -v `pwd`:/work -w /work \
     librepcb/librepcb-dev:webtools-1 \
-    hugo -F
+    hugo -F $HUGO_ARGS
 
 # Make 404.html working on *any* path
 sed -i 's/"\.\//"\//g' public/404.html