From 1664a85b1e6a62262ac4c49269e17d1949495de5 Mon Sep 17 00:00:00 2001
From: eug-vs <eugene@eug-vs.xyz>
Date: Wed, 20 Apr 2022 19:14:37 +0300
Subject: feat: add RSS feed generation

---
 .gitignore |  1 +
 Makefile   | 38 ++++++++++++++++++++++++++++++--------
 2 files changed, 31 insertions(+), 8 deletions(-)

diff --git a/.gitignore b/.gitignore
index 07c47a0..55d21d3 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 *.html
+*.xml
 blog/preview.md
diff --git a/Makefile b/Makefile
index 3d48ace..575cb6e 100644
--- a/Makefile
+++ b/Makefile
@@ -5,8 +5,10 @@ MARKDOWN=gfm+emoji
 STYLESHEET=/style.css
 HEAD=head.html
 HEADER=header.html
+RSS_FEED=blog/index.xml
 OPENRING_FOOTER=footer.html
-PANDOC_ARGS=-s --from=$(MARKDOWN) --to=html -c $(STYLESHEET) -B $(HEADER) -H $(HEAD) -M lang="en" --shift-heading-level-by=1 --highlight-style=gruvbox.theme
+PANDOC_ARGS= --from=$(MARKDOWN) --to=html
+PANDOC_HTML_ARGS=-s $(PANDOC_ARGS) -c $(STYLESHEET) -B $(HEADER) -H $(HEAD) -M lang="en" --shift-heading-level-by=1 --highlight-style=gruvbox.theme
 
 LINK_SEDSTRING=s/.md)/.html)/g;
 EMOJI_SEDSTRING=$(shell ./compile_emoji_sedstring.sh)
@@ -18,26 +20,46 @@ OPENRING_ARGS=$(shell ./compile_openring_args.sh)
 
 SOURCES=$(wildcard *.md blog/*.md articles/*.md)
 HTML=$(patsubst %.md, %.html, $(SOURCES))
+XML=$(patsubst %.md, %.xml, $(filter-out blog/preview.md, $(filter-out blog/index.md, $(wildcard blog/*.md))))
 
 
-all: $(HTML)
+all: $(HTML) $(RSS_FEED)
 
 %.html: %.md $(OPENRING_FOOTER)
 	@echo $@
 	@DESCRIPTION=$$(sed '2,/^$$/!d' $< | tr '\n' ' '); \
 		PAGETITLE=$$(sed '/^#/q' $< | sed 's/:[a-z]*://; s/#* //'); \
 		sed "$(LINK_SEDSTRING) $(EMOJI_SEDSTRING)" $< \
-		| pandoc $(PANDOC_ARGS) -M pagetitle="$$PAGETITLE | $(TITLE)" -A $(OPENRING_FOOTER) -M description="$$DESCRIPTION" > $@
+		| pandoc $(PANDOC_HTML_ARGS) -M pagetitle="$$PAGETITLE | $(TITLE)" -A $(OPENRING_FOOTER) -M description="$$DESCRIPTION" > $@
+
+%.xml: %.md
+	@echo $@
+	@echo '<item>' > $@
+	@echo "  <link>https://eug-vs.xyz/$*.html</link>" >> $@
+	@echo "  <pubDate>$*</pubDate>" >> $@
+	@echo "  <title>$$(sed '/^#/q' $< | sed 's/:[a-z]*://; s/#* //')</title>" >> $@
+	@echo "  <description><![CDATA[" >> $@
+	@sed "$(LINK_SEDSTRING) $(EMOJI_SEDSTRING)" $< | pandoc $(PANDOC_ARGS) $< >> $@
+	@echo "  ]]></description>" >> $@
+	@echo '</item>' >> $@
+
+$(RSS_FEED): $(XML)
+	@echo $@
+	@echo '<rss version="2.0"><channel>' > $@
+	@echo "<title>Eugene's Space</title><link>https://eug-vs.xyz</link><description>Eugene's blog</description>" >> $@
+	@cat $$(echo $^ | tr " " "\n" | sort -r | tr "\n" " ") >> $@
+	@echo '</channel></rss>' >> $@
 
 index.html: index.md blog/preview.md
 	@echo $@
 	@DESCRIPTION=$$(sed '2,/^$$/!d' $< | tr '\n' ' '); \
 		sed "/Recent blog posts/r blog/preview.md" $< \
 		| sed "$(LINK_SEDSTRING) $(EMOJI_SEDSTRING)" \
-		| pandoc $(PANDOC_ARGS) -M pagetitle="$(TITLE)" -M description="$$DESCRIPTION"> $@
+		| pandoc $(PANDOC_HTML_ARGS) -M pagetitle="$(TITLE)" -M description="$$DESCRIPTION"> $@
 
 $(OPENRING_FOOTER): openring-template.html
-	openring $(OPENRING_ARGS) < $< > $@
+	@echo $@
+	@openring $(OPENRING_ARGS) < $< > $@
 
 blog/preview.md: blog/index.md
 	@echo $@
@@ -46,9 +68,9 @@ blog/preview.md: blog/index.md
 open: $(HTML)
 	xdg-open index.html
 
-deploy: $(HTML)
+deploy: all
 	$(MAKE) unlocalize
-	rsync -rtvzP --exclude=".git" --exclude="*.md" . $(RSYNC_DESTINATION)
+	rsync -rtvzP --include="$(RSS_FEED)" --exclude=".git" --exclude="*.md" --exclude="*.xml" . $(RSYNC_DESTINATION)
 
 localize: $(HTML)
 	@for file in $^; do sed -i "$(UNLOCALIZE_SEDSTRING) $(LOCALIZE_SEDSTRING)" $$file; done
@@ -57,5 +79,5 @@ unlocalize: $(HTML)
 	@for file in $^; do sed -i "$(UNLOCALIZE_SEDSTRING)" $$file; done
 
 clean:
-	rm -f $(HTML) $(OPENRING_FOOTER) blog/preview.md
+	rm -f $(HTML) $(XML) $(OPENRING_FOOTER) $(RSS_FEED) blog/preview.md
 
-- 
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