Add YAMLLint rules

Fix linting errors that came up with the new rules

Main changes:
* Enforce YAML document start headers
* Enforce spacing with commas, colons and hyphens
* Enforce indentation
* Enforce use of quotes only then required
* Enforce use of single quotes over double quotes
* Enforce use of true/false over yes/no and derivatives
* [..] Other minor rules that were already followed

Signed-off-by: Colin Wilk <colin.wilk@tum.de>

1 files changed, 52 insertions, 0 deletions

diff --git a/.yamllint b/.yamllint
new file mode 100644
index 0000000..8551271
--- /dev/null
+++ b/.yamllint
@@ -0,0 +1,52 @@
+# https://yamllint.readthedocs.io/en/stable/rules.html
+---
+rules:
+  quoted-strings:
+    quote-type: single
+    required: only-when-needed
+
+  colons:
+    max-spaces-before: 0
+    max-spaces-after: 1
+
+  commas:
+    max-spaces-before: 0
+    min-spaces-after: 1
+    max-spaces-after: 1
+
+  comments:
+    require-starting-space: true
+    ignore-shebangs: true
+    min-spaces-from-content: 1
+
+  document-end:
+    present: false
+
+  document-start:
+    present: true
+
+  empty-lines:
+    max: 2
+    max-start: 0
+    max-end: 0
+
+  empty-values:
+    forbid-in-block-mappings: true
+    forbid-in-flow-mappings: true
+
+  float-values:
+    require-numeral-before-decimal: true
+
+  hyphens:
+    max-spaces-after: 1
+
+  indentation:
+    spaces: 2
+    indent-sequences: true
+    check-multi-line-strings: true
+
+  trailing-spaces: {}
+
+  truthy:
+    allowed-values: ['true', 'false']
+    check-keys: true