From 67ad50492dc882e3ebefded4ab3fe74d03059a72 Mon Sep 17 00:00:00 2001
From: Matthias Kruk <m@m10k.eu>
Date: Tue, 1 Sep 2020 20:33:42 +0900
Subject: [PATCH] doc/man: Add script for crosslinking of generated HTML
 documentation

---
 doc/man/Makefile   | 19 ++++++++++++++-----
 doc/man/linkify.sh | 26 ++++++++++++++++++++++++++
 2 files changed, 40 insertions(+), 5 deletions(-)
 create mode 100755 doc/man/linkify.sh

diff --git a/doc/man/Makefile b/doc/man/Makefile
index 0790b40..0f8a141 100644
--- a/doc/man/Makefile
+++ b/doc/man/Makefile
@@ -1,12 +1,21 @@
-HTMLFILES = paging.html
-PHONY =
+HTMLFILES = memory.10.html
+PHONY = clean
 
 all: $(HTMLFILES)
 
 clean:
-	rm -f $(HTMLFILES)
+	rm -f $(HTMLFILES) *.png
 
 .PHONY: $(PHONY)
 
-%.html: %.9
-	groff -mandoc -Thtml $< > $@
+%.0.html: %.0
+	groff -mandoc -tbl -Thtml $< > $@
+	./linkify.sh $@
+
+%.9.html: %.9
+	groff -mandoc -tbl -Thtml $< > $@
+	./linkify.sh $@
+
+%.10.html: %.10
+	groff -mandoc -tbl -Thtml $< > $@
+	./linkify.sh $@
diff --git a/doc/man/linkify.sh b/doc/man/linkify.sh
new file mode 100755
index 0000000..59c15b9
--- /dev/null
+++ b/doc/man/linkify.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# collect the name of all pages
+pages=()
+
+while read -r page; do
+	pages+=("$(basename "$page")")
+done < <(find . -name "*.0" -or -name "*.9" -or -name "*.10" -type f)
+
+# Iterate over all pages, inserting links to those pages that actually exist. I used a simple
+# regex for this at first, but this would also insert links for pages that don't exist, which
+# is not what we want since there is stuff like "hoge(0)" and references to not-yet-existing
+# articles.
+
+for ((i=1; i<="$#"; i++)); do
+	manpage="${!i}"
+
+	for page in "${pages[@]}"; do
+		pn=$(echo "$page" | cut -d '.' -f 1)
+		ps=$(echo "$page" | cut -d '.' -f 2)
+
+		sed -i -e "s|<b>$pn</b>($ps)|<a href=\"$pn.$ps.html\"><b>$pn</b>($ps)</a>|g" "$manpage"
+	done
+done
+
+exit 0
-- 
2.47.3