Switch to using CircleCI

.circleci/config.yml

@@ -0,0 +1,37 @@
+version: 2.1
+
+# Default actions to perform on each Emacs version
+default: &default-steps
+  steps:
+    - checkout
+    - run: apt-get update && apt-get install make
+    - run: make elpa
+    - run: make test
+
+# Enumerated list of Emacs versions
+jobs:
+  test-emacs-25:
+    docker:
+      - image: silex/emacs:25-dev
+        entrypoint: bash
+    <<: *default-steps
+
+  test-emacs-26:
+    docker:
+      - image: silex/emacs:26-dev
+        entrypoint: bash
+    <<: *default-steps
+
+  test-emacs-master:
+    docker:
+      - image: silex/emacs:master-dev
+        entrypoint: bash
+    <<: *default-steps
+
+workflows:
+  version: 2
+  ci-test-matrix:
+    jobs:
+      - test-emacs-25
+      - test-emacs-26
+      - test-emacs-master

Makefile

@@ -0,0 +1,9 @@
+version:
+	emacs --version
+
+test : version
+	cask exec buttercup -L .
+
+elpa:
+	cask install
+	cask update

README.md

@@ -1,6 +1,7 @@
 [![License GPL 3][badge-license]][copying]
 [![MELPA][melpa-badge]][melpa-package]
 [![MELPA Stable][melpa-stable-badge]][melpa-stable-package]
+[![Circle CI][circle-ci-badge]][circleci]
 
 # inf-clojure
 
@@ -372,7 +373,8 @@ Distributed under the GNU General Public License; type <kbd>C-h C-c</kbd> to vie
 [melpa-package]: http://melpa.org/#/inf-clojure
 [melpa-stable-package]: http://stable.melpa.org/#/inf-clojure
 [COPYING]: http://www.gnu.org/copyleft/gpl.html
-[badge-travis]: https://travis-ci.org/clojure-emacs/inf-clojure.svg?branch=master
+[circleci]: https://circleci.com/gh/clojure-emacs/inf-clojure
+[circleci-badge]: https://circleci.com/gh/clojure-emacs/inf-clojure.svg?style=svg
 [CIDER]: https://github.com/clojure-emacs/cider
 [Leiningen]: http://leiningen.org
 [contributors]: https://github.com/clojure-emacs/inf-clojure/contributors