59 lines
1.5 KiB
JavaScript
59 lines
1.5 KiB
JavaScript
var Stream = require('stream');
|
|
var Parse = require('./parse');
|
|
var duplexer2 = require('duplexer2');
|
|
var BufferStream = require('./BufferStream');
|
|
|
|
// Backwards compatibility for node versions < 8
|
|
if (!Stream.Writable || !Stream.Writable.prototype.destroy)
|
|
Stream = require('readable-stream');
|
|
|
|
function parseOne(match,opts) {
|
|
var inStream = Stream.PassThrough({objectMode:true});
|
|
var outStream = Stream.PassThrough();
|
|
var transform = Stream.Transform({objectMode:true});
|
|
var re = match instanceof RegExp ? match : (match && new RegExp(match));
|
|
var found;
|
|
|
|
transform._transform = function(entry,e,cb) {
|
|
if (found || (re && !re.exec(entry.path))) {
|
|
entry.autodrain();
|
|
return cb();
|
|
} else {
|
|
found = true;
|
|
out.emit('entry',entry);
|
|
entry.on('error',function(e) {
|
|
outStream.emit('error',e);
|
|
});
|
|
entry.pipe(outStream)
|
|
.on('error',function(err) {
|
|
cb(err);
|
|
})
|
|
.on('finish',function(d) {
|
|
cb(null,d);
|
|
});
|
|
}
|
|
};
|
|
|
|
inStream.pipe(Parse(opts))
|
|
.on('error',function(err) {
|
|
outStream.emit('error',err);
|
|
})
|
|
.pipe(transform)
|
|
.on('error',Object) // Silence error as its already addressed in transform
|
|
.on('finish',function() {
|
|
if (!found)
|
|
outStream.emit('error',new Error('PATTERN_NOT_FOUND'));
|
|
else
|
|
outStream.end();
|
|
});
|
|
|
|
var out = duplexer2(inStream,outStream);
|
|
out.buffer = function() {
|
|
return BufferStream(outStream);
|
|
};
|
|
|
|
return out;
|
|
}
|
|
|
|
module.exports = parseOne;
|