Build from CI cloned repo (and fix netlify previews)

Makefile

@@ -1,14 +1,37 @@
-PLAYBOOK := local-antora-playbook.yml
-ANTORAFLAGS :=
+CURRENT_COMMIT := $(shell git rev-parse HEAD)
 
-build:
+build-dev: build-ui
+	node_modules/.bin/antora generate local-antora-playbook.yml
+
+build-prod: build-ui
+	node_modules/.bin/antora generate antora-playbook.yml --fetch
+
+build-ui:
 	node_modules/.bin/gulp --cwd ui bundle
-	node_modules/.bin/antora generate $(PLAYBOOK) $(ANTORAFLAGS)
 
-.PHONY: clean
 clean:
 	rm -r build
 	# 'cache' is the configured cache dir in the playbook
 	rm -r cache
 
-.PHONY: build
+# The netlify repo is checked out without any blobs. This script
+# iterates through the release branches and checks them out one-by-one
+# to fetch all the files.
+# Then we can build directly from here, making it possible to build
+# with antora using the HEAD (enabling branch previews!)
+netlify-fetch:
+	git submodule update --init --recursive
+	# netlify messes with some files, restore everything to how it was:
+	git reset --hard --recurse-submodule
+	# fetch, because netlify does caching and we want to get the latest commits
+	git fetch --all
+	# checkout all release branches once, so we fetch the files
+	for remote in $(shell git branch -r | grep release/); do \
+		git checkout --recurse-submodules "$${remote#origin/}" ;\
+	done
+	# go back to the initial commit to start the build
+	git -c advice.detachedHead=false checkout --recurse-submodules $(CURRENT_COMMIT)
+
+netlify-build: netlify-fetch build-prod
+
+.PHONY: build-dev build-prod build-ui clean netlify-build netlify-fetch

antora-playbook.yml

@@ -15,7 +15,7 @@ urls:
 
 content:
   sources: 
-    - url: https://github.com/stackabletech/documentation.git
+    - url: .
       branches:
         - HEAD
         - release/23.4

netlify.toml

@@ -1,3 +1,7 @@
+[build]
+  command = "make netlify-build"
+  publish = "build/site"
+
 [[redirects]]
   from = "/airflow/nightly/*"
   to = "/home/nightly/airflow/:splat"