.yamllint

%YAML 1.2
---
# Configuration File of yamllint for Travis CI configurations and similarly relaxed YAML documents
# https://github.com/Lin-Buo-Ren/Configuration-Templates-for-Travis-CI
#
# This file is in YAML Ain’t Markup Language (YAML™)
# http://yaml.org/
#
# This file is based on the `default` pre-defined configuration from yamllint with documentation copied from its documentation
# https://yamllint.readthedocs.io/en/stable/configuration.html#default-configuration
#
# This file is based on The Unofficial yamllint Configuration Templates
# https://github.com/Lin-Buo-Ren/yamllint-configuration-templates
rules:
  # Use this rule to control the number of spaces inside braces (`{` and `}`).
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.braces
  braces:
    min-spaces-inside: 0
    max-spaces-inside: 0
    min-spaces-inside-empty: -1
    max-spaces-inside-empty: -1

  # Use this rule to control the number of spaces inside brackets (`[` and `]`).
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.brackets
  brackets:
    min-spaces-inside: 0
    max-spaces-inside: 0
    min-spaces-inside-empty: -1
    max-spaces-inside-empty: -1

  # Use this rule to control the number of spaces before and after colons (`:`).
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.colons
  colons:
    max-spaces-before: 0
    max-spaces-after: 1

  # Use this rule to control the number of spaces before and after commas (`,`).
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.commas
  commas:
    max-spaces-before: 0
    min-spaces-after: 1
    max-spaces-after: 1

  # Use this rule to control the position and formatting of comments.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.comments
  comments:
    level: warning
    # PATCHED: Comments without separate space are disabled content
    require-starting-space: false
    # PATCHED: We're good with 1
    min-spaces-from-content: 1

  # Use this rule to force comments to be indented like content.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.comments_indentation
  # PATCHED: False positives, disabled
  comments-indentation: disable
    #level: warning

  # Use this rule to require or forbid the use of document end marker (`...`).
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.document_end
  document-end: disable

  # Use this rule to require or forbid the use of document start marker (`---`).
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.document_start
  # PATCHED: Travis CI allow documents with document start markers with v1.1 YAML directive, but doesn't mentions it
  # https://github.com/travis-ci/travis-ci/issues/9600
  document-start: disable
    #level: warning
    #present: true

  # Use this rule to set a maximal number of allowed consecutive blank lines.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.empty_lines
  empty-lines:
    max: 2
    max-start: 0
    max-end: 0

  # Use this rule to prevent nodes with empty content, that implicitly result in null values.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.empty_values
  empty-values:
    forbid-in-block-mappings: false
    forbid-in-flow-mappings: false

  # Use this rule to control the number of spaces after hyphens (`-`).
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.hyphens
  hyphens:
    max-spaces-after: 1

  # Use this rule to control the indentation.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.indentation
  indentation:
    spaces: consistent
    indent-sequences: consistent
    check-multi-line-strings: false

  # Use this rule to prevent multiple entries with the same key in mappings.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.key_duplicates
  key-duplicates: enable

  # Use this rule to enforce alphabetical ordering of keys in mappings. The sorting order uses the Unicode code point number. As a result, the ordering is case-sensitive and not accent-friendly (see examples below).
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.key_ordering
  key-ordering: disable

  # Use this rule to set a limit to lines length.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.line_length
  line-length:
    # PATCHED: Modern text editors handle long lines nicely
    max: 99999
    allow-non-breakable-words: true
    allow-non-breakable-inline-mappings: false

  # Use this rule to require a new line character (`\n`) at the end of files.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.new_line_at_end_of_file
  new-line-at-end-of-file: enable

  # Use this rule to force the type of new line characters.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.new_lines
  new-lines:
    type: unix

  # Use this rule to prevent values with octal numbers. In YAML, numbers that start with `0` are interpreted as octal, but this is not always wanted. For instance `010` is the city code of Beijing, and should not be converted to `8`.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.octal_values
  octal-values:
    forbid-implicit-octal: false
    forbid-explicit-octal: false

  # Use this rule to forbid trailing spaces at the end of lines.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.trailing_spaces
  trailing-spaces: enable

  # Use this rule to forbid non-explictly typed truthy values other than `true` and `false`, for example `YES`, `False` and `off`.
  # https://yamllint.readthedocs.io/en/stable/rules.html#module-yamllint.rules.truthy
  truthy:
    level: warning
...