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/*
Language: YAML
Description: Yet Another Markdown Language
Author: Stefan Wienert <stwienert@gmail.com>
Contributors: Carl Baxter <carl@cbax.tech>
Requires: ruby.js
Website: https://yaml.org
Category: common, config
*/
function yaml(hljs) {
var LITERALS = 'true false yes no null';
// YAML spec allows non-reserved URI characters in tags.
var URI_CHARACTERS = '[\\w#;/?:@&=+$,.~*\'()[\\]]+';
// Define keys as starting with a word character
// ...containing word chars, spaces, colons, forward-slashes, hyphens and periods
// ...and ending with a colon followed immediately by a space, tab or newline.
// The YAML spec allows for much more than this, but this covers most use-cases.
var KEY = {
className: 'attr',
variants: [
{ begin: '\\w[\\w :\\/.-]*:(?=[ \t]|$)' },
{ begin: '"\\w[\\w :\\/.-]*":(?=[ \t]|$)' }, // double quoted keys
{ begin: '\'\\w[\\w :\\/.-]*\':(?=[ \t]|$)' } // single quoted keys
]
};
var TEMPLATE_VARIABLES = {
className: 'template-variable',
variants: [
{ begin: /\{\{/, end: /\}\}/ }, // jinja templates Ansible
{ begin: /%\{/, end: /\}/ } // Ruby i18n
]
};
var STRING = {
className: 'string',
relevance: 0,
variants: [
{ begin: /'/, end: /'/ },
{ begin: /"/, end: /"/ },
{ begin: /\S+/ }
],
contains: [
hljs.BACKSLASH_ESCAPE,
TEMPLATE_VARIABLES
]
};
// Strings inside of value containers (objects) can't contain braces,
// brackets, or commas
var CONTAINER_STRING = hljs.inherit(STRING, {
variants: [
{ begin: /'/, end: /'/ },
{ begin: /"/, end: /"/ },
{ begin: /[^\s,{}[\]]+/ }
]
});
var DATE_RE = '[0-9]{4}(-[0-9][0-9]){0,2}';
var TIME_RE = '([Tt \\t][0-9][0-9]?(:[0-9][0-9]){2})?';
var FRACTION_RE = '(\\.[0-9]*)?';
var ZONE_RE = '([ \\t])*(Z|[-+][0-9][0-9]?(:[0-9][0-9])?)?';
var TIMESTAMP = {
className: 'number',
begin: '\\b' + DATE_RE + TIME_RE + FRACTION_RE + ZONE_RE + '\\b'
};
var VALUE_CONTAINER = {
end: ',',
endsWithParent: true,
excludeEnd: true,
contains: [],
keywords: LITERALS,
relevance: 0
};
var OBJECT = {
begin: /\{/,
end: /\}/,
contains: [VALUE_CONTAINER],
illegal: '\\n',
relevance: 0
};
var ARRAY = {
begin: '\\[',
end: '\\]',
contains: [VALUE_CONTAINER],
illegal: '\\n',
relevance: 0
};
var MODES = [
KEY,
{
className: 'meta',
begin: '^---\\s*$',
relevance: 10
},
{ // multi line string
// Blocks start with a | or > followed by a newline
//
// Indentation of subsequent lines must be the same to
// be considered part of the block
className: 'string',
begin: '[\\|>]([1-9]?[+-])?[ ]*\\n( +)[^ ][^\\n]*\\n(\\2[^\\n]+\\n?)*'
},
{ // Ruby/Rails erb
begin: '<%[%=-]?',
end: '[%-]?%>',
subLanguage: 'ruby',
excludeBegin: true,
excludeEnd: true,
relevance: 0
},
{ // named tags
className: 'type',
begin: '!\\w+!' + URI_CHARACTERS
},
// https://yaml.org/spec/1.2/spec.html#id2784064
{ // verbatim tags
className: 'type',
begin: '!<' + URI_CHARACTERS + ">"
},
{ // primary tags
className: 'type',
begin: '!' + URI_CHARACTERS
},
{ // secondary tags
className: 'type',
begin: '!!' + URI_CHARACTERS
},
{ // fragment id &ref
className: 'meta',
begin: '&' + hljs.UNDERSCORE_IDENT_RE + '$'
},
{ // fragment reference *ref
className: 'meta',
begin: '\\*' + hljs.UNDERSCORE_IDENT_RE + '$'
},
{ // array listing
className: 'bullet',
// TODO: remove |$ hack when we have proper look-ahead support
begin: '-(?=[ ]|$)',
relevance: 0
},
hljs.HASH_COMMENT_MODE,
{
beginKeywords: LITERALS,
keywords: { literal: LITERALS }
},
TIMESTAMP,
// numbers are any valid C-style number that
// sit isolated from other words
{
className: 'number',
begin: hljs.C_NUMBER_RE + '\\b',
relevance: 0
},
OBJECT,
ARRAY,
STRING
];
var VALUE_MODES = [...MODES];
VALUE_MODES.pop();
VALUE_MODES.push(CONTAINER_STRING);
VALUE_CONTAINER.contains = VALUE_MODES;
return {
name: 'YAML',
case_insensitive: true,
aliases: ['yml', 'YAML'],
contains: MODES
};
}
module.exports = yaml;