web/_scripts/sh/create_pages.sh

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#!/usr/local/bin/bash
#
# Create HTML pages for Categories and Tags in posts.
#
# Usage:
# Call from the '_posts' sibling directory.
#
# v2.2
# https://github.com/cotes2020/jekyll-theme-chirpy
# © 2020 Cotes Chung
# Published under MIT License
set -eu
TYPE_CATEGORY=0
TYPE_TAG=1
category_count=0
tag_count=0
_read_yaml() {
local _endline="$(grep -n "\-\-\-" "$1" | cut -d: -f 1 | sed -n '2p')"
head -"$_endline" "$1"
}
read_categories() {
local _yaml="$(_read_yaml "$1")"
local _categories="$(echo "$_yaml" | grep "^categories:")"
local _category="$(echo "$_yaml" | grep "^category:")"
if [[ ! -z "$_categories" ]]; then
echo "$_categories" | sed "s/categories: *//;s/\[//;s/\].*//;s/, */,/g;s/\"//g;s/'//g"
elif [[ ! -z "_category" ]]; then
echo "$_category" | sed "s/category: *//;s/\[//;s/\].*//;s/, */,/g;s/\"//g;s/'//g"
fi
}
read_tags() {
local _yaml="$(_read_yaml "$1")"
echo "$_yaml" | grep "^tags:" | sed "s/tags: *//;s/\[//;s/\].*//;s/, */,/g;s/\"//g;s/'//g"
}
init() {
if [[ -d categories ]]; then
rm -rf categories
fi
if [[ -d tags ]]; then
rm -rf tags
fi
if [[ ! -d _posts ]]; then
exit 0
fi
mkdir categories tags
}
create_category() {
if [[ ! -z $1 ]]; then
local _name=$1
local _filepath="categories/$(echo "$_name" | sed 's/ /-/g' | awk '{print tolower($0)}').html"
if [[ ! -f "$_filepath" ]]; then
echo "---" > "$_filepath"
echo "layout: category" >> "$_filepath"
echo "title: $_name" >> "$_filepath"
echo "category: $_name" >> "$_filepath"
echo "---" >> "$_filepath"
((category_count=category_count+1))
fi
fi
}
create_tag() {
if [[ ! -z $1 ]]; then
local _name=$1
local _filepath="tags/$( echo "$_name" | sed "s/ /-/g;s/'//g" | awk '{print tolower($0)}' ).html"
if [[ ! -f "$_filepath" ]]; then
echo "---" > "$_filepath"
echo "layout: tag" >> "$_filepath"
echo "title: $_name" >> "$_filepath"
echo "tag: $_name" >> "$_filepath"
echo "---" >> "$_filepath"
((tag_count=tag_count+1))
fi
fi
}
#########################################
# Create HTML pages for Categories/Tags.
# Arguments:
# $1 - an array string
# $2 - type specified option
#########################################
create_pages() {
if [[ ! -z $1 ]]; then
# split string to array
IFS_BAK=$IFS
IFS=','
local _string=$1
case $2 in
$TYPE_CATEGORY)
for i in ${_string#,}; do
create_category "$i"
done
;;
$TYPE_TAG)
for i in ${_string#,}; do
create_tag "$i"
done
;;
*)
;;
esac
IFS=$IFS_BAK
fi
}
main() {
init
for _file in $(find "_posts" -type f \( -iname \*.md -o -iname \*.markdown \))
do
local _categories=$(read_categories "$_file")
local _tags=$(read_tags "$_file")
create_pages "$_categories" $TYPE_CATEGORY
create_pages "$_tags" $TYPE_TAG
done
if [[ $category_count -gt 0 ]]; then
echo "[INFO] Succeed! $category_count category-pages created."
fi
if [[ $tag_count -gt 0 ]]; then
echo "[INFO] Succeed! $tag_count tag-pages created."
fi
}
main