travis: Update stale setup

The last Travis run didn't get out of the setup phase:

  https://travis-ci.org/github/kyleam/bog/builds/679436803

This updated .travis.yml is modified from Magit-annex's, which was
modified from Magit's.

Note that this goes from testing just Emacs 24 to testing the latest
Emacs release (26.3) and master.  We could of course do more---in
terms of both Emacs and Org versions---but, given the currently
dormant state of this project, two runs with different Emacs versions
and their built-in Orgs will do.

1 files changed, 17 insertions, 17 deletions

diff --git a/.travis.yml b/.travis.yml
index 664caef..bb28881 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,24 +1,24 @@
-# Modified from
-# https://github.com/rranelli/maven-test-mode/blob/master/.travis.yml
-
-language: emacs-lisp
-
+sudo: false
+language: generic
 env:
+  global:
+    - CURL="curl -fsSkL --retry 9 --retry-delay 9"
+    - GHRAW="https://raw.githubusercontent.com"
   matrix:
-    - EMACS=emacs24
-    # - EMACS=emacs-snapshot
+  - EMACS_VERSION=26.3
+  - EMACS_VERSION=master
+  allow_failures:
+    - env: EMACS_VERSION=master
 
 install:
-  - if [ "$EMACS" = "emacs24" ]; then
-        sudo add-apt-repository -y ppa:cassou/emacs &&
-        sudo apt-get update -qq &&
-        sudo apt-get install -qq emacs24 emacs24-el;
-    fi
-  - if [ "$EMACS" = "emacs-snapshot" ]; then
-        sudo add-apt-repository -y ppa:ubuntu-elisp/ppa &&
-        sudo apt-get update -qq &&
-        sudo apt-get install -qq emacs-snapshot;
-    fi
+  - $CURL -O https://github.com/npostavs/emacs-travis/releases/download/bins/emacs-bin-${EMACS_VERSION}.tar.gz
+  - tar -xaf emacs-bin-${EMACS_VERSION}.tar.gz -C /
+  - export EMACS=/tmp/emacs/bin/emacs
 
 script:
   make test EMACS=${EMACS}
+
+notifications:
+  email:
+    on_success: never
+    on_failure: always