https://github.com/minhtuannguyen/cljocker

A simple DSL to build Dockerfile
https://github.com/minhtuannguyen/cljocker

clojure docker dockerfile dockerfiles dsl infrastructure infrastructure-as-code

Last synced: 4 months ago
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A simple DSL to build Dockerfile

• Host: GitHub
• URL: https://github.com/minhtuannguyen/cljocker
• Owner: minhtuannguyen
• License: apache-2.0
• Created: 2016-07-08T11:24:25.000Z (almost 10 years ago)
• Default Branch: master
• Last Pushed: 2018-09-05T08:00:11.000Z (almost 8 years ago)
• Last Synced: 2025-06-30T11:52:01.368Z (12 months ago)
• Topics: clojure, docker, dockerfile, dockerfiles, dsl, infrastructure, infrastructure-as-code
• Language: Clojure
• Homepage: https://github.com/minhtuannguyen/cljocker
• Size: 26.4 KB
• Stars: 4
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

          
# cljocker

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A simple DSL to define and generate Dockerfile

## Examples

To generate a Dockerfile from spec:

```clojure

(:require [cljocker.hh.dsl.docker :as d])

            

(defn- heap [heap] (str "-Xmx=" heap "m "))

(defn- port [port] (str "-Dport=" port))

(-> [:from     "java:8"

                :run      (lazy-seq ["mkdir" "-p" "/var/opt/folder"])

                :user     "nobody"

                :add      ["from" "to"]

                :workdir  "/var/opt/folder"

                :cmd      ["java" (heap 512) (port 512) ["-jar" "artifact.jar"]]]

    (d/new-dockerfile)

    (d/write! "path/to/dockerfile"))    

```

The content of the generated Dockerfile will be:

```shell

FROM java:8

RUN mkdir -p /var/opt/folder

USER nobody

ADD from to

WORKDIR /var/opt/folder

CMD java  -Xmx=512m  -Dport=512  -jar artifact.jar    

```

To validate a dockerfile spec:

```clojure

(:require [cljocker.hh.dsl.docker :as d])

            

(is (= [:valid]

       (-> [:from "image" :cmd "echo"]

           (d/new-dockerfile)

           (d/validate))))   

       

(is (= [:invalid "first instruction must be FROM"]

       (-> [:cmd "echo"]

           (d/new-dockerfile)

           (d/validate))))

```

## License

Copyright © 2016 

Distributed under the Eclipse Public License