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244
bin/ssg
Executable file
244
bin/ssg
Executable file
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#!/bin/sh -e
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#
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# https://romanzolotarev.com/bin/ssg
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# copyright 2018 roman zolotarev <hi@romanzolotarev.com>
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# copyright 2019-2022 romanzolotarev.com ou <hi@romanzolotarev.com>
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#
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# permission to use, copy, modify, and/or distribute this software for any
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# purpose with or without fee is hereby granted, provided that the above
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# copyright notice and this permission notice appear in all copies.
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#
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# the software is provided "as is" and the author disclaims all warranties
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# with regard to this software including all implied warranties of
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# merchantability and fitness. in no event shall the author be liable for
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# any special, direct, indirect, or consequential damages or any damages
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# whatsoever resulting from loss of use, data or profits, whether in an
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# action of contract, negligence or other tortious action, arising out of
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# or in connection with the use or performance of this software.
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#
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main() {
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test -n "$1" || usage
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test -n "$2" || usage
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test -n "$3" || usage
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test -n "$4" || usage
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test -d "$1" || no_dir "$1"
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test -d "$2" || no_dir "$2"
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src=$(readlink_f "$1")
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dst=$(readlink_f "$2")
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IGNORE=$(
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if ! test -f "$src/.ssgignore"; then
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printf ' ! -path "*/.*"'
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return
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fi
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while read -r x; do
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test -n "$x" || continue
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printf ' ! -path "*/%s*"' "$x"
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done <"$src/.ssgignore"
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)
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# files
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title="$3"
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h_file="$src/_header.html"
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f_file="$src/_footer.html"
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test -f "$f_file" && FOOTER=$(cat "$f_file") && export FOOTER
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test -f "$h_file" && HEADER=$(cat "$h_file") && export HEADER
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list_dirs "$src" |
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(cd "$src" && cpio -pdu "$dst")
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fs=$(
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if test -f "$dst/.files"; then
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list_affected_files "$src" "$dst/.files"
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else
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list_files "$1"
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fi
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)
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if test -n "$fs"; then
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echo "$fs" | tee "$dst/.files"
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if echo "$fs" | grep -q '\.md$'; then
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if test -x "$(which lowdown 2>/dev/null)"; then
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echo "$fs" | grep '\.md$' |
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render_md_files_lowdown "$src" "$dst" "$title"
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else
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if test -x "$(which Markdown.pl 2>/dev/null)"; then
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echo "$fs" | grep '\.md$' |
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render_md_files_Markdown_pl "$src" "$dst" "$title"
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else
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echo "couldn't find lowdown nor Markdown.pl"
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exit 3
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fi
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fi
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fi
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echo "$fs" | grep '\.html$' |
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render_html_files "$src" "$dst" "$title"
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echo "$fs" | grep -Ev '\.md$|\.html$' |
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(cd "$src" && cpio -pu "$dst")
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fi
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printf '[ssg] ' >&2
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print_status 'file, ' 'files, ' "$fs" >&2
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# sitemap
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base_url="$4"
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date=$(date +%Y-%m-%d)
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urls=$(list_pages "$src")
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test -n "$urls" &&
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render_sitemap "$urls" "$base_url" "$date" >"$dst/sitemap.xml"
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print_status 'url' 'urls' "$urls" >&2
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echo >&2
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}
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readlink_f() {
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file="$1"
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cd "$(dirname "$file")"
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file=$(basename "$file")
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while test -L "$file"; do
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file=$(readlink "$file")
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cd "$(dirname "$file")"
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file=$(basename "$file")
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done
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dir=$(pwd -P)
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echo "$dir/$file"
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}
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print_status() {
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test -z "$3" && printf 'no %s' "$2" && return
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echo "$3" | awk -v singular="$1" -v plural="$2" '
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END {
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if (NR==1) printf NR " " singular
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if (NR>1) printf NR " " plural
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}'
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}
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usage() {
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echo "usage: ${0##*/} src dst title base_url" >&2
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exit 1
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}
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no_dir() {
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echo "${0##*/}: $1: No such directory" >&2
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exit 2
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}
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list_dirs() {
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cd "$1" && eval "find . -type d ! -name '.' ! -path '*/_*' $IGNORE"
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}
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list_files() {
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cd "$1" && eval "find . -type f ! -name '.' ! -path '*/_*' $IGNORE"
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}
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list_dependant_files() {
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e="\\( -name '*.html' -o -name '*.md' -o -name '*.css' -o -name '*.js' \\)"
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cd "$1" && eval "find . -type f ! -name '.' ! -path '*/_*' $IGNORE $e"
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}
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list_newer_files() {
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cd "$1" && eval "find . -type f ! -name '.' $IGNORE -newer $2"
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}
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has_partials() {
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grep -qE '^./_.*\.html$|^./_.*\.js$|^./_.*\.css$'
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}
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list_affected_files() {
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fs=$(list_newer_files "$1" "$2")
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if echo "$fs" | has_partials; then
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list_dependant_files "$1"
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else
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echo "$fs"
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fi
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}
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render_html_files() {
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while read -r f; do
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render_html_file "$3" <"$1/$f" >"$2/$f"
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done
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}
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render_md_files_lowdown() {
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while read -r f; do
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lowdown \
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--html-no-escapehtml \
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--html-no-skiphtml \
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--parse-no-metadata \
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--parse-no-autolink <"$1/$f" |
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render_html_file "$3" \
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>"$2/${f%\.md}.html"
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done
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}
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render_md_files_Markdown_pl() {
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while read -r f; do
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Markdown.pl <"$1/$f" |
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render_html_file "$3" \
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>"$2/${f%\.md}.html"
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done
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}
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render_html_file() {
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# h/t Devin Teske
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awk -v title="$1" '
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{ body = body "\n" $0 }
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END {
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body = substr(body, 2)
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if (body ~ /<\/?[Hh][Tt][Mm][Ll]/) {
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print body
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exit
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}
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if (match(body, /<[[:space:]]*[Hh]1(>|[[:space:]][^>]*>)/)) {
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t = substr(body, RSTART + RLENGTH)
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sub("<[[:space:]]*/[[:space:]]*[Hh]1.*", "", t)
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gsub(/^[[:space:]]*|[[:space:]]$/, "", t)
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if (t) title = t " — " title
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}
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n = split(ENVIRON["HEADER"], header, /\n/)
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for (i = 1; i <= n; i++) {
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if (match(tolower(header[i]), "<title></title>")) {
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head = substr(header[i], 1, RSTART - 1)
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tail = substr(header[i], RSTART + RLENGTH)
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print head "<title>" title "</title>" tail
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} else print header[i]
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}
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print body
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print ENVIRON["FOOTER"]
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}'
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}
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list_pages() {
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e="\\( -name '*.html' -o -name '*.md' \\)"
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cd "$1" && eval "find . -type f ! -path '*/.*' ! -path '*/_*' $IGNORE $e" |
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sed 's#^./##;s#.md$#.html#;s#/index.html$#/#'
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}
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render_sitemap() {
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urls="$1"
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base_url="$2"
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date="$3"
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echo '<?xml version="1.0" encoding="UTF-8"?>'
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echo '<urlset'
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echo 'xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"'
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echo 'xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9'
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echo 'http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd"'
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echo 'xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">'
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echo "$urls" |
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sed -E 's#^(.*)$#<url><loc>'"$base_url"'/\1</loc><lastmod>'"$date"'</lastmod><priority>1.0</priority></url>#'
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echo '</urlset>'
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}
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main "$@"
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