Add "ymlfmt" for enforcing consistent YAML whitespace

.travis.yml

@@ -1,12 +1,13 @@
-language: go
-
-sudo: false
+language: bash
+services: docker
 
 install:
-  - .travis/get-markdownfmt.sh
+  - docker pull tianon/markdownfmt
+  - docker pull tianon/ymlfmt
 
 script:
   - .travis/check-markdownfmt.sh
+  - .travis/check-ymlfmt.sh
   - .travis/check-short.sh
   - .travis/check-required-files.sh
   - .travis/check-pr-no-readme.sh

.travis/check-markdownfmt.sh

@@ -8,11 +8,11 @@ files="$(
 			-name '*.md' \
 			-not -name 'README.md' \
 		\) -exec test -s '{}' ';' -print0 \
-		| xargs -0 markdownfmt -l)"
+		| xargs -0 ./markdownfmt.sh -l)"
 if [ "$files" ]; then
 	echo >&2 'Need markdownfmt:'
 	echo >&2 "$files"
 	echo >&2
-	echo "$files" | xargs markdownfmt -d >&2
+	echo "$files" | xargs ./markdownfmt.sh -d >&2
 	exit 1
 fi

.travis/check-ymlfmt.sh

@@ -0,0 +1,22 @@
+#!/usr/bin/env bash
+set -Eeuo pipefail
+
+cd "$(dirname "$(readlink -f "$BASH_SOURCE")")/.."
+
+files="$(find -name '*.yml')"
+need=()
+needdiff=
+for f in $files; do
+	fdiff="$(./ymlfmt.sh -d "$f")"
+	if [ -n "$fdiff" ]; then
+		need+=( "$f" )
+		needdiff+="$fdiff"$'\n'
+	fi
+done
+if [ -n "$needdiff" ]; then
+	echo >&2 'Need ymlfmt:'
+	echo >&2 "${need[@]}"
+	echo >&2
+	echo >&2 -n "$needdiff"
+	exit 1
+fi

markdownfmt.sh

@@ -1,4 +1,4 @@
 #!/bin/bash
 set -e
 
-exec docker run -i --rm -v "$PWD":/scratch -w /scratch tianon/markdownfmt markdownfmt "$@"
+exec docker run -i --rm -v "$PWD":/scratch -w /scratch -u "$(id -u):$(id -g)" tianon/markdownfmt markdownfmt "$@"

mediawiki/stack.yml

@@ -22,7 +22,7 @@ services:
     restart: always
     environment:
       # @see https://phabricator.wikimedia.org/source/mediawiki/browse/master/includes/DefaultSettings.php
-      MYSQL_DATABASE: 'my_wiki'
-      MYSQL_USER: 'wikiuser'
-      MYSQL_PASSWORD: 'example'
-      MYSQL_RANDOM_ROOT_PASSWORD: 'yes'
+      MYSQL_DATABASE: my_wiki
+      MYSQL_USER: wikiuser
+      MYSQL_PASSWORD: example
+      MYSQL_RANDOM_ROOT_PASSWORD: yes

ymlfmt.sh

@@ -0,0 +1,4 @@
+#!/bin/bash
+set -e
+
+exec docker run -i --rm -v "$PWD":/scratch -w /scratch -u "$(id -u):$(id -g)" tianon/ymlfmt ymlfmt "$@"