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/target
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# cryogen-core
[Cryogen](https://github.com/lacarmen/cryogen)'s compiler.
## License
Copyright © 2014 Carmen La
Distributed under the Eclipse Public License either version 1.0 or (at
your option) any later version.

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(defproject cryogen-core "0.1.0"
:description "Cryogen's compiler"
:url "https://github.com/lacarmen/cryogen-core"
:license {:name "Eclipse Public License"
:url "http://www.eclipse.org/legal/epl-v10.html"}
:dependencies [[org.clojure/clojure "1.6.0"]
[clj-rss "0.1.9"]
[me.raynes/fs "1.4.4"]
[crouton "0.1.2"]
[cheshire "5.3.1"]
[clj-text-decoration "0.0.2"]
[io.aviso/pretty "0.1.12"]
[hiccup "1.0.5"]
[selmer "0.7.3"]
[markdown-clj "0.9.58"
:exclusions [com.keminglabs/cljx]]])

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(ns cryogen.compiler
(:require [selmer.parser :refer [cache-off! render-file]]
[cryogen.io :refer
[get-resource find-assets create-folder wipe-public-folder copy-resources]]
[cryogen.sitemap :as sitemap]
[cryogen.rss :as rss]
[io.aviso.exception :refer [write-exception]]
[clojure.java.io :refer [copy file reader writer]]
[clojure.string :as s]
[text-decoration.core :refer :all]
[markdown.core :refer [md-to-html-string]]
[cryogen.toc :refer [generate-toc]]
[cryogen.sass :as sass]))
(cache-off!)
(defn root-path [config k]
(if-let [root (k config)]
(str "/" root "/") "/"))
(def public "resources/public")
(defn find-md-assets []
(find-assets "templates" ".md"))
(defn find-posts [{:keys [post-root]}]
(find-assets (str "templates/md" post-root) ".md"))
(defn find-pages [{:keys [page-root]}]
(find-assets (str "templates/md" page-root) ".md"))
(defn parse-post-date [file-name date-fmt]
(let [fmt (java.text.SimpleDateFormat. date-fmt)]
(.parse fmt (.substring file-name 0 10))))
(defn post-uri [file-name {:keys [blog-prefix post-root]}]
(str blog-prefix post-root (s/replace file-name #".md" ".html")))
(defn page-uri [page-name {:keys [blog-prefix page-root]}]
(str blog-prefix page-root (s/replace page-name #".md" ".html")))
(defn read-page-meta [page rdr]
(try
(read rdr)
(catch Exception _
(throw (IllegalArgumentException. (str "Malformed metadata on page: " page))))))
(defn parse-content [rdr]
(md-to-html-string
(->> (java.io.BufferedReader. rdr)
(line-seq)
(s/join "\n"))
:heading-anchors true))
(defn parse-page [is-post? page config]
(with-open [rdr (java.io.PushbackReader. (reader page))]
(let [page-name (.getName page)
file-name (s/replace page-name #".md" ".html")
page-meta (read-page-meta page-name rdr)
content (parse-content rdr)]
(merge
(update-in page-meta [:layout] #(str (name %) ".html"))
{:file-name file-name
:content content
:toc (if (:toc page-meta) (generate-toc content))}
(if is-post?
(let [date (parse-post-date file-name (:post-date-format config))
archive-fmt (java.text.SimpleDateFormat. "yyyy MMMM" (java.util.Locale. "en"))
formatted-group (.format archive-fmt date)]
{:date date
:formatted-archive-group formatted-group
:parsed-archive-group (.parse archive-fmt formatted-group)
:uri (post-uri file-name config)
:tags (set (:tags page-meta))})
{:uri (page-uri file-name config)
:page-index (:page-index page-meta)})))))
(defn read-posts [config]
(->> (find-posts config)
(map #(parse-page true % config))
(sort-by :date)
reverse))
(defn read-pages [config]
(->> (find-pages config)
(map #(parse-page false % config))
(sort-by :page-index)))
(defn tag-post [tags post]
(reduce (fn [tags tag]
(update-in tags [tag] (fnil conj []) (select-keys post [:uri :title])))
tags (:tags post)))
(defn group-by-tags [posts]
(reduce tag-post {} posts))
(defn group-for-archive [posts]
(->> posts
(map #(select-keys % [:title :uri :date :formatted-archive-group :parsed-archive-group]))
(group-by :formatted-archive-group)
(map (fn [[group posts]]
{:group group
:parsed-group (:parsed-archive-group (get posts 0))
:posts (map #(select-keys % [:title :uri :date]) posts)}))
(sort-by :parsed-group)
reverse))
(defn tag-info [{:keys [blog-prefix tag-root]} tag]
{:name (name tag)
:uri (str blog-prefix tag-root (name tag) ".html")})
(defn add-prev-next [pages]
(map (fn [[prev target next]]
(assoc target
:prev (if prev (select-keys prev [:title :uri]) nil)
:next (if next (select-keys next [:title :uri]) nil)))
(partition 3 1 (flatten [nil pages nil]))))
(defn group-pages [pages]
(let [{navbar-pages true
sidebar-pages false} (group-by #(boolean (:navbar? %)) pages)]
(map (partial sort-by :page-index) [navbar-pages sidebar-pages])))
(defn compile-pages [default-params pages {:keys [blog-prefix page-root]}]
(when-not (empty? pages)
(println (blue "compiling pages"))
(create-folder (str blog-prefix page-root))
(doseq [{:keys [uri] :as page} pages]
(println "\t-->" (cyan uri))
(spit (str public uri)
(render-file "templates/html/layouts/page.html"
(merge default-params
{:servlet-context "../"
:page page}))))))
(defn compile-posts [default-params posts {:keys [blog-prefix post-root disqus-shortname]}]
(when-not (empty? posts)
(println (blue "compiling posts"))
(create-folder (str blog-prefix post-root))
(doseq [post posts]
(println "\t-->" (cyan (:uri post)))
(spit (str public (:uri post))
(render-file (str "templates/html/layouts/" (:layout post))
(merge default-params
{:servlet-context "../"
:post post
:disqus-shortname disqus-shortname}))))))
(defn compile-tags [default-params posts-by-tag {:keys [blog-prefix tag-root] :as config}]
(when-not (empty? posts-by-tag)
(println (blue "compiling tags"))
(create-folder (str blog-prefix tag-root))
(doseq [[tag posts] posts-by-tag]
(let [{:keys [name uri]} (tag-info config tag)]
(println "\t-->" (cyan uri))
(spit (str public uri)
(render-file "templates/html/layouts/tag.html"
(merge default-params {:servlet-context "../"
:name name
:posts posts})))))))
(defn compile-index [default-params {:keys [blog-prefix disqus?]}]
(println (blue "compiling index"))
(spit (str public blog-prefix "/index.html")
(render-file "templates/html/layouts/home.html"
(merge default-params
{:home true
:disqus? disqus?
:post (get-in default-params [:latest-posts 0])}))))
(defn compile-archives [default-params posts {:keys [blog-prefix]}]
(println (blue "compiling archives"))
(spit (str public blog-prefix "/archives.html")
(render-file "templates/html/layouts/archives.html"
(merge default-params
{:archives true
:groups (group-for-archive posts)}))))
(defn tag-posts [posts config]
(map #(update-in % [:tags] (partial map (partial tag-info config))) posts))
(defn read-config []
(let [config (-> "templates/config.edn"
get-resource
slurp
read-string
(update-in [:blog-prefix] (fnil str ""))
(update-in [:rss-name] (fnil str "rss.xml"))
(update-in [:sass-src] (fnil str "css"))
(update-in [:sass-dest] (fnil str "css"))
(update-in [:post-date-format] (fnil str "yyyy-MM-dd"))
(update-in [:keep-files] (fnil seq [])))]
(merge
config
{:page-root (root-path :page-root config)
:post-root (root-path :post-root config)
:tag-root (root-path :tag-root config)})))
(defn compile-assets []
(println (green "compiling assets..."))
(let [{:keys [site-url blog-prefix rss-name recent-posts sass-src sass-dest keep-files] :as config} (read-config)
posts (add-prev-next (read-posts config))
pages (add-prev-next (read-pages config))
[navbar-pages sidebar-pages] (group-pages pages)
posts-by-tag (group-by-tags posts)
posts (tag-posts posts config)
default-params {:title (:site-title config)
:tags (map (partial tag-info config) (keys posts-by-tag))
:latest-posts (->> posts (take recent-posts) vec)
:navbar-pages navbar-pages
:sidebar-pages sidebar-pages
:archives-uri (str blog-prefix "/archives.html")
:index-uri (str blog-prefix "/index.html")
:rss-uri (str blog-prefix "/" rss-name)}]
(wipe-public-folder keep-files)
(println (blue "copying resources"))
(copy-resources config)
(compile-pages default-params pages config)
(compile-posts default-params posts config)
(compile-tags default-params posts-by-tag config)
(compile-index default-params config)
(compile-archives default-params posts config)
(println (blue "generating site map"))
(spit (str public blog-prefix "/sitemap.xml") (sitemap/generate site-url))
(println (blue "generating rss"))
(spit (str public blog-prefix "/" rss-name) (rss/make-channel config posts))
(println (blue "compiling sass"))
(sass/compile-sass->css! sass-src sass-dest)))
(defn compile-assets-timed []
(time
(try
(compile-assets)
(catch Exception e
(if
(or (instance? IllegalArgumentException e)
(instance? clojure.lang.ExceptionInfo e))
(println (red "Error:") (yellow (.getMessage e)))
(write-exception e))))))
(defn -main []
(compile-assets-timed))

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(ns cryogen.github
(:require [cheshire.core :as json])
(:import (org.apache.commons.codec.binary Base64 StringUtils)))
(defn get-gist [gist-uri]
(let [gist-id (last (clojure.string/split gist-uri #"/+")) ;;just need id for git api
gist-resp (try (slurp (str "https://api.github.com/gists/" gist-id))
(catch Exception e {:error (.getMessage e)}))]
(when-not (:error gist-resp)
(if-let [gist (-> (json/parse-string gist-resp)
(get "files")
first ;;todo: optionally get all gist files?
val)]
{:content (get gist "content")
:language (get gist "language")
:name (get gist "filename")
:id gist-id}))))
(defn get-src [git-file]
(let [git-re (re-find #"github.com/(.*)/blob/(.+?)/(.+)" git-file) ;;want second and last now (user/repo,file) for git api
git-res (str "https://api.github.com/repos/" (second git-re) "/contents/" (last git-re))
git-resp (try (slurp git-res)
(catch Exception e {:error (.getMessage e)}))]
(when-not (:error git-resp)
(if-let [git-src (json/parse-string git-resp)]
{:content (String. (Base64/decodeBase64 (get git-src "content")) "UTF-8")
:name (get git-src "name")
:uri (get (get git-src "_links") "html")}))))
(defn get-gits-ex []
[(get-gist "https://gist.github.com/viperscape/cec68f0791687f5959f1")
(get-src "https://github.com/viperscape/kuroshio/blob/master/examples/pubsub.clj")])
;(prn (get-gits-ex))

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(ns cryogen.io
(:require [clojure.java.io :refer [file]]
[me.raynes.fs :as fs]))
(def public "resources/public")
(defn get-resource [resource]
(-> (Thread/currentThread)
(.getContextClassLoader)
(.getResource resource)
(.toURI)
(file)))
(defn find-assets [f ext]
(->> (get-resource f)
file-seq
(filter (fn [file] (-> file .getName (.endsWith ext))))))
(defn create-folder [folder]
(let [loc (file (str public folder))]
(when-not (.exists loc)
(.mkdirs loc))))
(defn wipe-public-folder [keep-files]
(let [filenamefilter (reify java.io.FilenameFilter (accept [this _ filename] (not (some #{filename} keep-files))))]
(doseq [path (.listFiles (file public) filenamefilter)]
(fs/delete-dir path))))
(defn copy-resources [{:keys [blog-prefix resources]}]
(doseq [resource resources]
(let [src (str "resources/templates/" resource)
target (str public blog-prefix "/" resource)]
(cond
(not (.exists (file src)))
(throw (IllegalArgumentException. (str "resource " src " not found")))
(.isDirectory (file src))
(fs/copy-dir src target)
:else
(fs/copy src target)))))

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(ns cryogen.rss
(:require [clj-rss.core :as rss]
[clojure.xml :refer [emit]])
(:import java.util.Date))
(defn posts-to-items [site-url author posts]
(map
(fn [{:keys [uri title content date]}]
(let [link (str (if (.endsWith site-url "/") (apply str (butlast site-url)) site-url) uri)]
{:guid link
:link link
:title title
:description content
:pubDate date
:author author}))
posts))
(defn make-channel [config posts]
(apply
(partial rss/channel-xml
false
{:title (:site-title config)
:link (:site-url config)
:description (:description config)
:lastBuildDate (Date.)
:author (:author config)})
(posts-to-items (:site-url config) (:author config) posts)))

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(ns cryogen.sass
(:require [clojure.java.shell :refer [sh]]
[clojure.java.io :as io]))
(defn sass-installed?
"Checks for the installation of Sass."
[]
(= 0 (:exit (sh "sass" "--version"))))
(defn find-sass-files
"Given a Diretory, gets files, filtered to those having scss or sass extention"
[dir]
(->> (.list (io/file dir))
(seq)
(filter (comp not nil? (partial re-find #"(?i:s[ca]ss$)")))))
(defn compile-sass-file!
"Given a sass file which might be in src-sass directory,
output the resulting css in dest-sass. All error handling is
done by sh / launching the sass command."
[sass-file
src-sass
dest-sass]
(sh "sass"
"--update"
(str src-sass "/" sass-file)
(str dest-sass "/" )))
(defn compile-sass->css!
"Given a directory src-sass, looks for all sass files and compiles them into
dest-sass. Prompts you to install sass if he finds sass files and can't find
the command. Shows you any problems it comes across when compiling. "
[src-sass
dest-sass]
(let [sass-files (find-sass-files src-sass)]
(if (seq sass-files)
;; I found sass files,
;; If sass is installed
(if (sass-installed?)
;; I compile all files
(doseq [a-file sass-files]
(println "Compiling Sass File:" a-file)
(let [result (compile-sass-file! a-file src-sass dest-sass)]
(if (zero? (:exit result))
;; no problems in sass compilation
(println "Successfully compiled:" a-file)
;; else I show the error
(println (:err result)))))
;; Else I prompt to install Sass
(println "Sass seems not to be installed, but you have scss / sass files in "
src-sass
" - You might want to install it here: sass-lang.com")))))

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(ns cryogen.sitemap
(:require [clojure.xml :refer [emit]]
[cryogen.io :refer [get-resource find-assets]])
(:import java.util.Date))
;;generate sitemaps using the sitemap spec
;;http://www.sitemaps.org/protocol.html
(defn format-date [date]
(let [fmt (java.text.SimpleDateFormat. "yyyy-MM-dd")]
(.format fmt date)))
(defn loc [f]
(-> f (.getAbsolutePath) (.split "resources/public/") second))
(defn generate [site-url]
(with-out-str
(emit
{:tag :urlset
:attrs {:xmlns "http://www.sitemaps.org/schemas/sitemap/0.9"}
:content
(for [f (find-assets "public" ".html")]
{:tag :url
:content
[{:tag :loc
:content [(str site-url (loc f))]}
{:tag :lastmod
:content [(-> f (.lastModified) (Date.) format-date)]}]})})))

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(ns cryogen.toc
(:require [crouton.html :as html]
[hiccup.core :as hiccup]))
(defn get-headings [content]
(reduce
(fn [headings {:keys [tag attrs content] :as elm}]
(if (some #{tag} [:h1 :h2 :h3])
(conj headings elm)
(if-let [more-headings (get-headings content)]
(into headings more-headings)
headings)))
[] content))
(defn make-links [headings]
(into [:ol.contents]
(for [{[{{name :name} :attrs} title] :content} headings]
[:li [:a {:href (str "#" name)} title]])))
(defn generate-toc [html]
(-> html
(.getBytes)
(java.io.ByteArrayInputStream.)
(html/parse)
:content
(get-headings)
(make-links)
(hiccup/html)))

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(ns cryogen.watcher
(:require [clojure.java.io :refer [file]]))
(defn get-assets [root]
(file-seq (file root)))
(defn sum-times [path]
(->> (get-assets path) (map #(.lastModified %)) (reduce +)))
(defn watch-assets [root action]
(loop [times (sum-times root)]
(Thread/sleep 300)
(let [new-times (sum-times root)]
(when-not (= times new-times)
(action))
(recur new-times))))
(defn start-watcher! [root action]
(doto (Thread. #(watch-assets root action))
(.setDaemon true)
(.start)))