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utils.clj
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utils.clj
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; This file is part of clj-docker-client.
;
; clj-docker-client is free software: you can redistribute it and/or modify
; it under the terms of the GNU Lesser General Public License as published by
; the Free Software Foundation, either version 3 of the License, or
; (at your option) any later version.
;
; clj-docker-client is distributed in the hope that it will be useful,
; but WITHOUT ANY WARRANTY; without even the implied warranty of
; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
; GNU Lesser General Public License for more details.
;
; You should have received a copy of the GNU Lesser General Public License
; along with clj-docker-client. If not, see <http://www.gnu.org/licenses/>.
(ns clj-docker-client.utils
(:require [cheshire.core :as json])
(:import (com.spotify.docker.client.messages HostConfig
ContainerConfig
PortBinding)
(java.util List
Set)
(com.fasterxml.jackson.databind ObjectMapper)))
(def id-length 12)
(defn format-id
"Return docker SHA256 ids in the standard length"
[^String id]
(-> id
(clojure.string/split #":")
(last)
(subs 0 id-length)))
;; TODO: Optimize as mentioned in:
;; https://www.reddit.com/r/Clojure/comments/8zurv4/critical_code_review_and_feedback/
(defn sh-tokenize!
"Tokenizes a shell command given as a string into the command and its args.
Either returns a list of tokens or throws an IllegalStateException.
Sample input: sh -c 'while sleep 1; do echo \\\"${RANDOM}\\\"; done'
Output: [sh, -c, while sleep 1; do echo \"${RANDOM}\"; done]"
[^String command]
(let [[escaped?
current-arg
args
state] (loop [cmd command
escaped? false
state :no-token
current-arg ""
args []]
(if (or (nil? cmd)
(zero? (count cmd)))
[escaped? current-arg args state]
(let [char ^Character (first cmd)]
(if escaped?
(recur (rest cmd) false state (str current-arg char) args)
(case state
:single-quote (if (= char \')
(recur (rest cmd) escaped? :normal current-arg args)
(recur (rest cmd) escaped? state (str current-arg char) args))
:double-quote (case char
\" (recur (rest cmd) escaped? :normal current-arg args)
\\ (let [next (second cmd)]
(if (or (= next \")
(= next \\))
(recur (drop 2 cmd) escaped? state (str current-arg next) args)
(recur (drop 2 cmd) escaped? state (str current-arg char next) args)))
(recur (rest cmd) escaped? state (str current-arg char) args))
(:no-token :normal) (case char
\\ (recur (rest cmd) true :normal current-arg args)
\' (recur (rest cmd) escaped? :single-quote current-arg args)
\" (recur (rest cmd) escaped? :double-quote current-arg args)
(if-not (Character/isWhitespace char)
(recur (rest cmd) escaped? :normal (str current-arg char) args)
(if (= state :normal)
(recur (rest cmd) escaped? :no-token "" (conj args current-arg))
(recur (rest cmd) escaped? state current-arg args))))
(throw (IllegalStateException.
(format "Invalid shell command: %s, unexpected token %s found." command state))))))))]
(if escaped?
(conj args (str current-arg \\))
(if (not= state :no-token)
(conj args current-arg)
args))))
(defn port-binding-default-public
[bind]
(if (clojure.string/includes? bind ":")
(let [[host port] (clojure.string/split bind #":")]
(PortBinding/of ^String host ^String port))
(PortBinding/of "0.0.0.0" ^String bind)))
(defn filter-host
[s]
(if (clojure.string/includes? s ":")
(second (clojure.string/split s #":"))
s))
(defn port-configs-from
[port-mapping]
(let [host-ports (->> port-mapping
(keys)
(map str)
(map #(vector % [(port-binding-default-public %)]))
(reduce (fn [acc [k v]]
(assoc acc (filter-host k) v)) {}))
container-ports (->> port-mapping
(vals)
(map str)
(into #{}))]
{:host-config (if (empty? host-ports)
(.build (HostConfig/builder))
(-> (HostConfig/builder)
(.portBindings host-ports)
(.build)))
:exposed-ports container-ports}))
(defn config-of
([^String image]
(config-of image [] [] {} nil nil))
([^String image ^List cmd]
(config-of image cmd [] {} nil nil))
([^String image ^List cmd ^List env-vars]
(config-of image cmd env-vars {} nil nil))
([^String image ^List cmd ^List env-vars port-bindings ^String working-dir ^String user]
(let [port-config (port-configs-from port-bindings)]
(-> (ContainerConfig/builder)
(.hostConfig (:host-config port-config))
(.env env-vars)
(.image image)
(.exposedPorts ^Set (:exposed-ports port-config))
(.cmd cmd)
(.workingDir working-dir)
(.user user)
(.build)))))
(defn format-env-vars
[env-vars]
(map #(format "%s=%s" (name (first %)) (last %))
env-vars))
(defn spotify-obj->Map
[obj]
(let [mapper (ObjectMapper.)]
(json/parse-string (.writeValueAsString mapper obj) true)))