80 lines
2.4 KiB
JavaScript
80 lines
2.4 KiB
JavaScript
var jsbeautify = require('js-beautify').js_beautify;
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var deepmerge = require('deepmerge');
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var through = require('through2');
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var PluginError = require('plugin-error');
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var detectIndent = require('detect-indent');
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module.exports = function(editor, jsbeautifyOptions, deepmergeOptions) {
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/*
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* deepmerge options
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*/
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deepmergeOptions = deepmergeOptions || {};
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/*
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* create 'editBy' function from 'editor'
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*/
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var editBy;
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if (typeof editor === 'function') {
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// edit JSON object by user specific function
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editBy = function(json) { return editor(json); };
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} else if (typeof editor === 'object') {
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// edit JSON object by merging with user specific object
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editBy = function(json) { return deepmerge(json, editor, deepmergeOptions); };
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} else if (typeof editor === 'undefined') {
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throw new PluginError('gulp-json-editor', 'missing "editor" option');
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} else {
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throw new PluginError('gulp-json-editor', '"editor" option must be a function or object');
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}
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/*
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* js-beautify options
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*/
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jsbeautifyOptions = jsbeautifyOptions || {};
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/*
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* create through object and return it
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*/
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return through.obj(function(file, encoding, callback) {
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// ignore it
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if (file.isNull()) {
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this.push(file);
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return callback();
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}
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// stream is not supported
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if (file.isStream()) {
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this.emit('error',
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new PluginError('gulp-json-editor', 'Streaming is not supported'));
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return callback();
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}
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try {
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// try to get current indentation
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var indent = detectIndent(file.contents.toString('utf8'));
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// beautify options for this particular file
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var beautifyOptions = deepmerge({}, jsbeautifyOptions); // make copy
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beautifyOptions.indent_size = beautifyOptions.indent_size || indent.amount || 2;
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beautifyOptions.indent_char = beautifyOptions.indent_char || (indent.type === 'tab' ? '\t' : ' ');
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beautifyOptions.beautify = !('beautify' in beautifyOptions && !beautifyOptions.beautify);
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// edit JSON object and get it as string notation
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var json = JSON.stringify(editBy(JSON.parse(file.contents.toString('utf8'))));
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// beautify JSON
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if (beautifyOptions.beautify) {
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json = jsbeautify(json, beautifyOptions);
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}
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// write it to file
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file.contents = Buffer.from(json);
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} catch (err) {
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this.emit('error', new PluginError('gulp-json-editor', err));
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}
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this.push(file);
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callback();
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});
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};
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