From 83fbfcf88a692fd3b578b7907f7b6f863a5d29ee Mon Sep 17 00:00:00 2001
From: Alex Thiessen <alex.thiessen.de+github@gmail.com>
Date: Sat, 18 Apr 2020 18:39:29 +0200
Subject: [PATCH 1/4] travis: Remove obsolete `sudo`

`sudo` key is deprecated, refer to
https://docs.travis-ci.com/user/reference/overview/#deprecated-virtualization-environments.
---
 .travis.yml | 1 -
 1 file changed, 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index b3fa2728..d10607db 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,4 +1,3 @@
-sudo: false
 script: test/run
 language: c
 os:

From 44ddc583340abe8429d07438795539311eb70feb Mon Sep 17 00:00:00 2001
From: Alex Thiessen <alex.thiessen.de+github@gmail.com>
Date: Sat, 18 Apr 2020 18:39:35 +0200
Subject: [PATCH 2/4] travis: Update language from `c` to `shell`

Be more precise as to what language is used; full list is found here:
https://config.travis-ci.com/ref/language.
---
 .travis.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index d10607db..198a72c0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,5 @@
 script: test/run
-language: c
+language: shell
 os:
   - linux
   - osx

From 576f2b37acf290ff44c034fd3c7f6fa3971e3b86 Mon Sep 17 00:00:00 2001
From: Alex Thiessen <alex.thiessen.de+github@gmail.com>
Date: Sat, 18 Apr 2020 18:39:36 +0200
Subject: [PATCH 3/4] travis: Switch build matrix from `os` to `jobs`

There are a couple ways to declare a build matrix in Travis CI, refer to
https://docs.travis-ci.com/user/build-matrix.

Since upcoming commits will add more ways to run tests, switch the build
matrix from simple OS variation to a more powerful list of jobs.
---
 .travis.yml | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 198a72c0..a5d5806f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,5 +1,7 @@
-script: test/run
 language: shell
-os:
-  - linux
-  - osx
+
+jobs:
+  - script: test/run
+    os: linux
+  - script: test/run
+    os: osx

From b75b7697198b4eaa02c44d6290cb3f1aa1c046e1 Mon Sep 17 00:00:00 2001
From: Alex Thiessen <alex.thiessen.de+github@gmail.com>
Date: Sat, 18 Apr 2020 18:43:10 +0200
Subject: [PATCH 4/4] travis: Refactor jobs to use inheritance

Since the existing jobs are similar (currently, the `script` keys are
same), move the equal parts to a new shared key to have them in one
place. The new map will receive more content in upcoming commits.
---
 .travis.yml | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index a5d5806f..a35f07a0 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,15 @@
+# YAML anchors need to appear first.
+# Keys starting with an underscore are the custom ones, refer to
+# https://docs.travis-ci.com/user/build-config-yaml#private-keys-as-yaml-anchors-and-aliases-and-external-tooling
+
+_native_job: &native_job
+  script: |
+    test/run
+
 language: shell
 
 jobs:
-  - script: test/run
+  - <<: *native_job
     os: linux
-  - script: test/run
+  - <<: *native_job
     os: osx