error

Easy clojure error handling

Installation

Make your deps.edn look like this:

; ... paths probably

{:deps {coast-framework/error {:mvn/version "1.0.2"}}}
        ;... your other libraries}}

; ... rest of deps.edn

Usage

Require it like this

(ns your-project
  (:require [error.core :as error]))

Use it like this

(defn validate-email [email]
  (if (re-matches #".+@.+\..+" email)
    email
    (error/raise (str "Please enter a valid email address, not " email))))

(let [[email e] (error/rescue (validate-email "not an email"))]
  (if (some? e)
    {:error e}
    {:email email}))

or like this

(defn validate-email [email]
  (if (re-matches #".+@.+\..+" email)
    email
    (error/raise (str "Please enter a valid email address, not " email))))
      :error/email

(let [[email e] (error/rescue (validate-email "not an email")
                  :error/email)]
  (if (some? e)
    {:error/email e}
    {:email email}))

It will still throw on exceptions if the identifier you specify isn't the same

(error/rescue
  (error/raise "error" :error)
  :error1)

; :error1 != :error so the following exception will be called
(throw (ex-info "error" {:error.core/e "error" :error.core/id :error}))

It also works with regular exceptions with try*

(defn validate-email [email]
  (if (re-matches #".+@.+\..+" email)
    email
    (throw (Exception. (str "Please enter a valid email address, not " email)))))

(let [[email e] (error/try* (validate-email "not an email"))]
  (if (some? e)
    {:error/email (.getMessage e)}
    {:email email}))

Testing

git clone ...
cd error
make test

License

MIT

Contribution

Any and all issues or pull requests welcome!

Too Small

This library is really small, it's true. Too small? Could be.