1 files changed, 34 insertions, 12 deletions
diff --git a/doc/updt.sh b/doc/updt.sh
index a6292c8..1c9d023 100755
--- a/doc/updt.sh
+++ b/doc/updt.sh
@@ -1,25 +1,47 @@
-#!/bin/sh
+#!/bin/bash
 
-fmd() {
-cat << EOC
-<html>
+# the HTML template
+main='<html>
 <head>
   <link rel="stylesheet" type="text/css" href="doc.css">
   <meta charset="UTF-8">
 </head>
 <body>
-$(cat)
+GENERATED-MARKDOWN-HERE
 </body>
-</html>
-EOC
+</html>'
+
+# substitute the pattern $1 by the content of the file $2
+subst() {
+  awk -v pat="$1" -v rep="$(sed 's:\\:\\\\:g' $2)" '{gsub(pat,rep);gsub(pat,"\\&");print}'
+}
+
+# update the date field of file $1
+updadate() {
+  local x=$1
+  local t=$(git log -n 1 --format=%ct $x)
+  [[ -n "$t" ]] || t=$(stat -c %Y $x)
+  local d=$(LANG= date -d @$t +"%d %B %Y")
+  sed -i "s/^\(    Date: *\).*/\1$d/" $x
 }
 
+# make the html file for $1
+mkhtml() {
+  local x=$1
+  local h=${x%%.md}.html
+  expand -i $x | sed 's:^        :    :' > $h.pre
+  markdown -f toc,autolink $h.pre > $h.toc.no
+  markdown -Tf toc,autolink $h.pre > $h.toc.yes
+  head --bytes=-$(stat -c %s $h.toc.no) $h.toc.yes > $h.toc
+  echo "$main" |
+  subst GENERATED-MARKDOWN-HERE $h.toc.no |
+  subst TABLE-OF-CONTENT-HERE $h.toc > $h
+  rm $h.*
+}
 
+# apply
 for x in *.md; do
-  t=$(stat -c %Y $x)
-  t=$(git log -n 1 --format=%ct $x)
-  d=$(LANG= date -d @$t +"%d %B %Y")
-  sed -i "s/^\(    Date: *\).*/\1$d/" $x
-  markdown -f toc,autolink $x | fmd > ${x%%.md}.html
+  updadate $x
+  mkhtml $x
 done