yaml-language-server
Version:
72 lines • 2.92 kB
JavaScript
;
/*---------------------------------------------------------------------------------------------
* Copyright (c) IBM Corporation. All rights reserved.
* Licensed under the MIT License. See License.txt in the project root for license information.
*--------------------------------------------------------------------------------------------*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.toYamlStringScalar = toYamlStringScalar;
function toYamlStringScalar(s, preferSingleQuote = false) {
const quote = preferSingleQuote ? "'" : '"';
// empty string
if (s.length === 0) {
return `${quote}${quote}`;
}
// single quote character
if (s.length === 1 && s === '"') {
return '"\\""';
}
// literal quote strings like "" or ''
if (s.length === 2 && ((s[0] === '"' && s[1] === '"') || (s[0] === "'" && s[1] === "'"))) {
return s[0] === '"' ? '"\\"\\""' : `"''"`;
}
// check if the string is already a properly quoted YAML string
if (s.length >= 2) {
const firstChar = s[0];
const lastChar = s[s.length - 1];
if ((firstChar === '"' && lastChar === '"') || (firstChar === "'" && lastChar === "'")) {
return s;
}
}
// strings containing quotes or backslashes
if (/["\\]/.test(s)) {
return JSON.stringify(s);
}
// support YAML spec 1.1 boolean values and null
if (/^(?:on|off|true|false|yes|no|null|~)$/i.test(s)) {
return `${quote}${s}${quote}`;
}
// numeric values: integer/float, hex (0x), and octal (0o or YAML 1.1 style 0[0-7]+)
if (/^-?(?:0|[1-9]\d*)(?:\.\d+)?(?:[eE][+-]?\d+)?$/.test(s) ||
/^0x[0-9a-fA-F]+$/.test(s) ||
/^0o[0-7]+$/.test(s) ||
/^0[0-7]+$/.test(s)) {
return `"${s}"`;
}
// leading/trailing whitespaces need quoting
if (/^\s|\s$/.test(s)) {
return preferSingleQuote ? `'${s.replace(/'/g, "''")}'` : JSON.stringify(s);
}
// comment indicator
if (/(?:^|\s)#/.test(s)) {
return preferSingleQuote ? `'${s.replace(/'/g, "''")}'` : JSON.stringify(s);
}
// reserved indicators that cannot start a plain scalar
if (/^[\][{}#&*!|>'"%@`]/.test(s)) {
return preferSingleQuote ? `'${s.replace(/'/g, "''")}'` : JSON.stringify(s);
}
// -, ?, or : followed by space or end
if (/^[-?:](\s|$)/.test(s)) {
return preferSingleQuote ? `'${s.replace(/'/g, "''")}'` : JSON.stringify(s);
}
// colon in middle (mapping key indicator)
// e.g. `foo: bar` or `foo : bar` needs quoting, but `foo:bar` does not
if (/(?:^|[^:]):(?:\s|$)/.test(s)) {
return preferSingleQuote ? `'${s.replace(/'/g, "''")}'` : JSON.stringify(s);
}
// newlines, tabs, or carriage return
if (/[\n\t\r]/.test(s)) {
return JSON.stringify(s);
}
return s;
}
//# sourceMappingURL=yamlScalar.js.map