{"id":15482964,"url":"https://github.com/devth/dec","last_synced_at":"2025-04-22T16:42:04.862Z","repository":{"id":57713631,"uuid":"51680880","full_name":"devth/dec","owner":"devth","description":":cyclone: Deep Environmental Configuration","archived":false,"fork":false,"pushed_at":"2018-09-28T16:11:14.000Z","size":296,"stargazers_count":9,"open_issues_count":0,"forks_count":2,"subscribers_count":2,"default_branch":"master","last_synced_at":"2025-04-14T17:05:46.040Z","etag":null,"topics":["clojure","configuration","minimalist","twelve-factor"],"latest_commit_sha":null,"homepage":"https://devth.com/2018/dec-deep-environmental-config","language":"Clojure","has_issues":true,"has_wiki":null,"has_pages":null,"mirror_url":null,"source_name":null,"license":"epl-1.0","status":null,"scm":"git","pull_requests_enabled":true,"icon_url":"https://github.com/devth.png","metadata":{"files":{"readme":"README.md","changelog":"CHANGELOG.md","contributing":null,"funding":null,"license":"LICENSE","code_of_conduct":null,"threat_model":null,"audit":null,"citation":null,"codeowners":null,"security":null,"support":null}},"created_at":"2016-02-14T05:21:43.000Z","updated_at":"2020-03-10T09:00:04.000Z","dependencies_parsed_at":"2022-09-17T18:53:00.088Z","dependency_job_id":null,"html_url":"https://github.com/devth/dec","commit_stats":null,"previous_names":[],"tags_count":2,"template":false,"template_full_name":null,"repository_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/devth%2Fdec","tags_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/devth%2Fdec/tags","releases_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/devth%2Fdec/releases","manifests_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories/devth%2Fdec/manifests","owner_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners/devth","download_url":"https://codeload.github.com/devth/dec/tar.gz/refs/heads/master","host":{"name":"GitHub","url":"https://github.com","kind":"github","repositories_count":250278967,"owners_count":21404296,"icon_url":"https://github.com/github.png","version":null,"created_at":"2022-05-30T11:31:42.601Z","updated_at":"2022-07-04T15:15:14.044Z","host_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub","repositories_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repositories","repository_names_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/repository_names","owners_url":"https://repos.ecosyste.ms/api/v1/hosts/GitHub/owners"}},"keywords":["clojure","configuration","minimalist","twelve-factor"],"created_at":"2024-10-02T05:10:26.737Z","updated_at":"2025-04-22T16:42:04.840Z","avatar_url":"https://github.com/devth.png","language":"Clojure","funding_links":[],"categories":[],"sub_categories":[],"readme":"\u003cp align=\"center\"\u003e\n  \u003cimg width=\"640\"\n    src=\"https://github.com/devth/dec/raw/master/img/dec-colors.png?raw=true\" /\u003e\n\u003c/p\u003e\n\u003cp align=\"center\"\u003e\n  \u003ci\u003eDeep Environmental Configuration\u003c/i\u003e\n\u003c/p\u003e\n\n# dec\n\n[![Build Status](https://travis-ci.org/devth/dec.svg?branch=master)](https://travis-ci.org/devth/dec)\n[![Clojars Project](https://img.shields.io/clojars/v/dec.svg)](https://clojars.org/dec)\n[![codecov](https://codecov.io/gh/devth/dec/branch/master/graph/badge.svg)](https://codecov.io/gh/devth/dec)\n\ndec builds arbitrarily nested data structures from simple KV strings.\n\n- Tiny codebase; tiny name\n- Functionally pure\n- Composable\n- Zero runtime dependencies\n- 100% test coverage with unit tests \u0026 [test.check](https://github.com/clojure/test.check)\n- Fully linted against [eastwood](https://github.com/jonase/eastwood) \u0026\n  [kibit](https://github.com/jonase/kibit)\n- Up-to-date [Change Log](CHANGELOG.md)\n\n## Rationale\n\nEnv vars are constrained to simple key value pairs, yet they are ubiquitous.\nDocker config and [12 Factor Config](http://12factor.net/config) in particular\nrely on this traditional mechanism. But modern apps often require more complex\ndata structures, to wit: maps and lists.\n\n## Usage\n\ndec exposes two primary functions: `explode` and `enflat`. They are inverses of\neachother, such that `identity == (comp explode enflat)`, i.e.:\n\n```clojure\n(let [nested {:foo {:bar [:baz :qux]}}]\n  (= nested (explode (enflat nested))))\n;;=\u003e true\n```\n\nAssume our env looks like:\n\n```shell\nexport DEC_HOSTS_0=a.host.com\nexport DEC_HOSTS_1=b.host.com\nexport DEC_LEVEL=debug\n```\n\nThen we we obtain some env vars via\n[environ](https://github.com/weavejester/environ), as one does,\nfilter by a known prefix, and `explode` the results:\n\n```clojure\n(require\n  '[environ.core :refer [env]]\n  '[dec :refer [explode]])\n\n(explode (into {} (filter (fn [[k v]] (.startsWith (name k) \"dec\")) env)))\n\n{:dec {:hosts [\"a.host.com\" \"b.host.com\"], :level \"debug\"}}\n```\n\nA little simpler, without the `env`:\n\n```clojure\n(explode\n  {:dec-level \"debug\"\n   :dec-hosts-0 \"a.host.com\"\n   :dec-hosts-1 \"b.host.com\"})\n\n{:dec {:hosts [\"a.host.com\" \"b.host.com\"], :level \"debug\"}}\n````\n\nEnviron is not required, nor is it a dependency of dec; I'm using it as an\nexample of a common way to obtain environmental configuration.\n\n### Custom delimiter\n\ndec optionally takes a delimiter parameter:\n\n```clojure\n(explode {:dec.hosts.0 \"a.host.com\"\n          :dec.hosts.1 \"b.host.com\"\n          :dec.level \"debug\"}\n          {:delimiter \".\"})\n\n{:dec {:hosts [\"a.host.com\" \"b.host.com\"], :level \"debug\"}}\n```\n\n## Run tests\n\n```\nlein test\n```\n\n## Calculate code coverage\n\n```\nlein cloverage\n```\n\n## Run linters\n\n```\nlein kibit\nlein eastwood\n```\n\n## License\n\nCopyright © 2016 Trevor C. Hartman\n\nDistributed under the Eclipse Public License either version 1.0 or any later\nversion.\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdevth%2Fdec","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fdevth%2Fdec","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fdevth%2Fdec/lists"}