Refactor post-processing to use sed instead of sd

html-tidy takes care of some post-processing, rendering other
substitutions obsolete. Remove the obsolete regex substitutions.

Now that we did that, the remaining substitutions can be done with
vanilla POSIX or POSIX-Extended regular expressions. Replace sd with
sed, and group the substitutions together into one invocation instead of
multiple invocations piped together. This change speeds up
post-processing to be almost as fast as the initial build step.

linter-configs/tidy.conf

@@ -6,3 +6,5 @@ output-xhtml: yes
 quiet: yes
 indent: no
 tidy-mark: no
+quote-nbsp: no
+sort-attributes: alpha

scripts/populate-webrings.sh

@@ -56,60 +56,20 @@ while getopts "hd" flags; do
 	esac
 done
 
-trim_trailing_comma() {
-	sd ',$' ''
-}
-
-values_to_csv() {
-	tr '\n' ',' | trim_trailing_comma && echo
-}
-
-# values for the GEORGE webring
-# Left bc I quit trying to make a good first-party iframe alternative
-# that conformed to my site design standards while also imparting the
-# message of GEORGE as intended.
-# george() {
-# 	printf 'GEORGE,'
-# 	{
-# 		curl -sSL --compressed 'https://george.gh0.pw/embed.cgi?seirdy' \
-# 		| htmlq -a href 'main p a' 
-# 		echo "null"
-# 	} | values_to_csv
-# }
-#
 endless_orbit() {
 	printf 'Endless Orbit,'
-	{
-		curl -sSL --compressed https://linkyblog.neocities.org/onionring/onionring-variables.js \
-		| grep -C 1 https://seirdy.one/
-		echo "'null',"
-	} | sd https://seirdy.one/ https://linkyblog.neocities.org/webring.html \
-		| sd "\n|'" '' | trim_trailing_comma
-		echo
-}
-
-netizens() {
-	printf 'Netizens,'
-	{
-		curl -sSL --compressed https://netizensring.link/onionring-variables.js \
-		| grep -C 1 https://seirdy.one/
-	} | sd 'https://seirdy.one/,?' 'https://netizensring.link/' \
-		| sd "\n|'|\r" '' | trim_trailing_comma 
-		echo ',null'
-}
-
-print_csv_values() {
-	# george
-	endless_orbit
-	# netizens
+	curl -sSL --compressed https://linkyblog.neocities.org/onionring/onionring-variables.js \
+	| grep -C 1 https://seirdy.one/ \
+	| tr -d "'\n" | sed 's|https://seirdy.one/|https://linkyblog.neocities.org/webring.html|'
+	echo 'null'
 }
 
 if [ "$dry_run" = '1' ]; then
-	print_csv_values
+	endless_orbit
 elif [ -f "$webrings_dest" ]; then
 		echo "webrings file already generated"
 else
-	print_csv_values | cat "$webrings_src" - >"$webrings_dest"
+	endless_orbit | cat "$webrings_src" - >"$webrings_dest"
 fi
 
 # vi:ft=sh

scripts/xhtmlize-single-file.sh

@@ -10,13 +10,13 @@
 # use xmllint to do the formatting.
 # xmllint ruins inline CSS so delete the inline CSS and re-insert it.
 # xmllint also adds extra whitespace around <pre><code> which we remove
-# with "sd". I chose sd since it handles newlines well.
+# with sed.
 # It also decreases indents by one level
 
 set -e -u
 
 html_file="$1"
-tmp_file="$html_file.tmp"
+tmp_file="$(mktemp)"
 xhtml_file=${html_file%*.html}.xhtml
 
 cleanup() {
@@ -30,17 +30,18 @@ run_tidy () {
 
 # delete the stylesheet from the html file; we'll re-insert it later.
 # Also remove two indentation levels
-sed 7d "$html_file" | xmllint --format --encode UTF-8 --noent - | tail -n +2 | sd '^\t(?:\t)?' '' | run_tidy >"$tmp_file"
+sed 7d "$html_file" | xmllint --format --encode UTF-8 --noent - | tail -n +2 | run_tidy >"$tmp_file"
 {
 	head -n7 "$tmp_file"
 	cat "$OUTPUT_DIR/tmp.css"
 	# shellcheck disable=SC2016 # these are regex statements, not shell expressions
-	tail -n +8 "$tmp_file" \
-		| sd '<pre(?: tabindex="0")?>\n(?:\t|\s)*<(code|samp)( |>)' '<pre tabindex="0"><$1$2' \
-		| sd '(?:\n)?</(code|samp)>\n(?:[\t\s]*)?</pre>' '</$1></pre>' \
-		| sd '</span>(?:&nbsp;)?.span itemprop="familyName"' '</span>&#160;<span itemprop="familyName"' \
-		| sd -s '&nbsp;' '&#160;' \
-		| sd -f m 'class="u-photo photo"[^<]*<' 'class="u-photo photo"/> <' \
-		| sd '([a-z])<(data|time)' '$1 <$2' \
-		| sd '</span>(<a[^>]*rel="(?:nofollow ugc|ugc nofollow)"(?:[^>]*)?>liked</a>)' '</span> $1'
+	sed \
+			-e '1,7d' \
+			-e 's|\.svg" width="16" /><span|svg" width="16" /> <span|' \
+			-e 's|</span>(&nbsp;)?.span itemprop="familyName|</span>&#160;<span itemprop="familyName"|' \
+			-E \
+			-e 's|([a-z])<data|\1 <data|' \
+			-e 's#</span>(<a[^>]*rel="(nofollow ugc|ugc nofollow)"([^>]*)?>liked</a>)#</span> \1#' \
+			-e 's#<pre( tabindex="0")?>\n(\t|\s)*<(code|samp)( |>)#<pre tabindex="0"><\3\4#' \
+			"$tmp_file"
 } >"$html_file"