cryogen-core/src/cryogen_core/sass.clj

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(ns cryogen-core.sass
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(:require [clojure.java.shell :refer [sh]]
[clojure.java.io :as io]
[cryogen-core.io :refer [ignore match-re-filter]]))
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(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. Ignores files matching any ignored regexps."
[dir ignored-files]
(let [filename-filter (match-re-filter #"(?i:s[ca]ss$)")]
(->> (.listFiles (io/file dir) filename-filter)
(filter #(not (.isDirectory %)))
(filter (ignore ignored-files))
(map #(.getName %)))))
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(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
ignored-files]
(let [sass-files (find-sass-files src-sass ignored-files)]
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(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")))))