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index.js
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index.js
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import PluginError from 'plugin-error';
import through from 'through2';
import Cache from 'cache-swap';
import File from 'vinyl';
import pick from 'object.pick';
import { version as VERSION } from '../package.json';
import TaskProxy from './task-proxy';
const fileCache = new Cache({ cacheDirName: 'gulp-cache' });
function defaultKey(file) {
return `${VERSION}${file.contents.toString('base64')}`;
}
function defaultRestore(restored) {
if (restored.contents) {
// Handle node 0.11 buffer to JSON as object with { type: 'buffer', data: [...] }
if (restored && restored.contents && Array.isArray(restored.contents.data)) {
restored.contents = new Buffer(restored.contents.data);
} else
if (Array.isArray(restored.contents)) {
restored.contents = new Buffer(restored.contents);
} else
if (typeof restored.contents === 'string') {
restored.contents = new Buffer(restored.contents, 'base64');
}
}
const restoredFile = new File(restored);
// Restore any properties that the original task put on the file;
// but omit the normal properties of the file
Object.keys(restored).forEach((key) => {
if (File.isCustomProp(key)) {
restoredFile[key] = restored[key];
}
});
return restoredFile;
}
function defaultValue(file) {
const vinylProps = ['cwd', 'base', 'contents', 'stat', 'history', 'path'];
const customProps = Object.keys(file).filter(File.isCustomProp);
// Convert from a File object (from vinyl) into a plain object
return pick(file, [
...vinylProps,
...customProps
]);
}
const defaultOptions = {
fileCache,
name: 'default',
success: true,
key: defaultKey,
restore: defaultRestore,
value: defaultValue
};
plugin.Cache = Cache;
plugin.fileCache = fileCache;
plugin.defaultOptions = defaultOptions;
export default function plugin(task, inputOptions) {
// Check for required task option
if (!task) {
throw new PluginError('gulp-cache', 'Must pass a task to cache()');
}
const options = {
...plugin.defaultOptions,
...task.cacheable,
...inputOptions
};
const taskProxy = new TaskProxy(task, options);
function each(file, enc, next) {
if (file.isNull()) {
next(null, file);
return;
}
if (file.isStream()) {
next(new PluginError('gulp-cache', 'Cannot operate on stream sources'));
return;
}
const signals = taskProxy.processFile(file);
signals.on('error', (err) => {
next(new PluginError('gulp-cache', err));
});
signals.on('file', (file) => {
this.push(file);
});
signals.on('done', () => {
next(null);
});
}
function flush(next) {
taskProxy.flush(next);
}
return through.obj(each, flush);
}
plugin.clear =
function clear(inputOptions) {
const options = {
...plugin.defaultOptions,
...inputOptions
};
const taskProxy = new TaskProxy(null, options);
async function each(file, enc, next) {
if (file.isNull()) {
next(null, file);
return;
}
if (file.isStream()) {
next(new PluginError('gulp-cache', 'Cannot operate on stream sources'));
return;
}
try {
await taskProxy.removeCachedResult(file);
next(null, file);
return;
} catch (err) {
next(new PluginError('gulp-cache', err));
return;
}
}
return through.obj(each);
};
plugin.clearAll =
function clearAll() {
return new Promise((resolve, reject) => {
fileCache.clear(null, (err) => {
if (err) {
reject(new PluginError(
'gulp-cache',
`Problem clearing the cache: ${err.message}`
));
return;
}
resolve();
});
});
};