Add branch deploy script

tools/branch-deploy.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+# Deploys all branches of a Hugo repository to a structure of folders.
+# Useful for deploying all PRs/branches of a Hugo installation to a test URL for viewing.
+
+# Args: folder
+TARGET_FOLDER="$1"
+
+mkdir -p "${TARGET_FOLDER}"
+
+# Track all remote branches locally
+git branch -r | grep -v '\->' | sed "s,\x1B\[[0-9;]*[a-zA-Z],,g" | while read remote; do git branch --track "${remote#origin/}" "$remote"; done
+
+# Pull the branches
+git pull --all
+git fetch --all
+
+# Iterate each local branch, and check it out into tmp folder, then build into the destination folder
+for BRANCH in $(git for-each-ref --format='%(refname:short)' refs/heads); do
+    echo "Building ${BRANCH}"
+
+    # Make folders
+    mkdir -p "${TARGET_FOLDER}/${BRANCH}"
+    TEMP_FOLDER=`mktemp -d`
+
+    # Checkout the branch
+    git --work-tree="${TEMP_FOLDER}" checkout "${BRANCH}" -- .
+
+    # Build to the destination folder
+    hugo --gc -b "${URL_BASE}/${BRANCH}" -s "${TEMP_FOLDER}" -d "${TARGET_FOLDER}/${BRANCH}"
+
+    # Cleanup the temp folder
+    rm -rf "${TEMP_FOLDER}"
+done