Use full image URLs in feeds

2 files changed, 29 insertions, 1 deletions

diff --git a/Makefile b/Makefile
index 8846a3e..ae1e75d 100644
--- a/Makefile
+++ b/Makefile
@@ -47,7 +47,7 @@ subpages = $(patsubst content/%.md,.cache/meta/%.json, \
         $(shell test -d $(patsubst .cache/meta%,content%,$(1)) && find $(patsubst .cache/meta%,content%,$(1)) -maxdepth 1 -type f -name "*.md" ! -name "index.md") \
         $(shell test -d $(patsubst .cache/meta%,content%,$(1)) && find $(patsubst .cache/meta%,content%,$(1)) -mindepth 2 -maxdepth 2 -type f -name "index.md"))
 
-.cache/meta/%.json: content/%.md $$(call subpages,$$(call namespace,$$@,)) scripts/subpages.jq scripts/metadata_tpl.json | .cache/meta
+.cache/meta/%.json: content/%.md $$(call subpages,$$(call namespace,$$@,)) scripts/subpages.lua scripts/subpages.jq scripts/metadata_tpl.json | .cache/meta
         $(info [META] $< -> $@)
         
         mkdir -p $(@D)
@@ -66,6 +66,9 @@ subpages = $(patsubst content/%.md,.cache/meta/%.json, \
         pandoc \
                 -f markdown-citations \
                 -t html5 \
+                --lua-filter scripts/subpages.lua \
+                $(GLOBAL_METADATA) \
+                --metadata namespace="$(NAMESPACE)" \
                 -o "$@.content" "$<"
         jq '. + { content: $$content }' --rawfile content "$@.content" "$@.meta" > "$@"
         rm "$@.pages"
diff --git a/scripts/subpages.lua b/scripts/subpages.lua
new file mode 100644
index 0000000..95f68f5
--- /dev/null
+++ b/scripts/subpages.lua
@@ -0,0 +1,25 @@
+local path = require 'pandoc.path'
+
+local namespace = ''
+local siteUrl = ''
+
+function meta(meta)
+    namespace = pandoc.utils.stringify(meta.namespace)
+    siteUrl = pandoc.utils.stringify(meta.site.url):gsub("/$", "")
+end
+
+function image(el)
+    if path.is_relative(el.src) then el.src = siteUrl .. path.join({ namespace, el.src }) end
+
+    return el
+end
+
+function link(el)
+    if path.is_relative(el.target) then
+        el.target = siteUrl .. path.join({ namespace, el.target })
+    end
+
+    return el
+end
+
+return { { Meta = meta }, { Image = image, Link = link } }