Files: 02bde5229699b0b75af814a5dabed22fca2c48bc / index.js
13069 bytesRaw
1 | var pull = require('pull-stream') |
2 | var cat = require('pull-cat') |
3 | var buffered = require('pull-buffered') |
4 | var Repo = require('pull-git-repo') |
5 | var pack = require('pull-git-pack') |
6 | var pktLine = require('./lib/pkt-line') |
7 | var indexPack = require('pull-git-pack/lib/index-pack') |
8 | var util = require('./lib/util') |
9 | var multicb = require('multicb') |
10 | var ProgressBar = require('progress') |
11 | var pkg = require('./package.json') |
12 | |
13 | var agentCap = 'agent=' + pkg.name + '/' + pkg.version |
14 | |
15 | var dummyCapsRef = { |
16 | name: 'capabilities^{}', |
17 | hash: '0000000000000000000000000000000000000000' |
18 | } |
19 | |
20 | function handleOption(options, name, value) { |
21 | switch (name) { |
22 | case 'verbosity': |
23 | options.verbosity = value|0 |
24 | return true |
25 | case 'progress': |
26 | options.progress = !!value && value !== 'false' |
27 | return true |
28 | /* |
29 | case 'followtags': |
30 | options.followtags = !!value |
31 | return true |
32 | case 'depth': |
33 | options.depth = depth|0 |
34 | return true |
35 | case 'deepen-relative': |
36 | options.deepenRelative = !!value && value !== 'false' |
37 | return true |
38 | */ |
39 | default: |
40 | console.error('unknown option', name + ': ' + value) |
41 | return false |
42 | } |
43 | } |
44 | |
45 | function capabilitiesSource() { |
46 | return pull.once([ |
47 | 'option', |
48 | 'connect', |
49 | ].join('\n') + '\n\n') |
50 | } |
51 | |
52 | function optionSource(cmd, options) { |
53 | var args = util.split2(cmd) |
54 | var msg = handleOption(options, args[0], args[1]) |
55 | msg = (msg === true) ? 'ok' |
56 | : (msg === false) ? 'unsupported' |
57 | : 'error ' + msg |
58 | return pull.once(msg + '\n') |
59 | } |
60 | |
61 | // transform ref objects into lines |
62 | function listRefs(read) { |
63 | var ended |
64 | return function (abort, cb) { |
65 | if (ended) return cb(ended) |
66 | read(abort, function (end, ref) { |
67 | ended = end |
68 | if (end === true) cb(null, '\n') |
69 | if (end) cb(end) |
70 | else cb(null, |
71 | [ref.value, ref.name].concat(ref.attrs || []).join(' ') + '\n') |
72 | }) |
73 | } |
74 | } |
75 | |
76 | // upload-pack: fetch to client |
77 | // references: |
78 | // git/documentation/technical/pack-protocol.txt |
79 | // git/documentation/technical/protocol-capabilities.txt |
80 | function uploadPack(read, repo, options) { |
81 | var sendRefs = receivePackHeader([ |
82 | agentCap, |
83 | ], repo.refs(), repo.symrefs()) |
84 | |
85 | var lines = pktLine.decode(read, { |
86 | onCaps: onCaps, |
87 | verbosity: options.verbosity |
88 | }) |
89 | var readWantHave = lines.haves() |
90 | var acked |
91 | var haves = {} |
92 | var sendPack |
93 | var wants = {} |
94 | var shallows = {} |
95 | var hasWants |
96 | var gotHaves |
97 | |
98 | function onCaps(caps) { |
99 | if (options.verbosity >= 2) { |
100 | console.error('client capabilities:', caps) |
101 | } |
102 | } |
103 | |
104 | function readWant(abort, cb) { |
105 | if (abort) return |
106 | // read upload request (wants list) from client |
107 | readWantHave(null, function next(end, want) { |
108 | if (end || want.type == 'flush-pkt') { |
109 | cb(end || true, cb) |
110 | return |
111 | } |
112 | if (want.type == 'want') { |
113 | wants[want.hash] = true |
114 | hasWants = true |
115 | } else if (want.type == 'shallow') { |
116 | shallows[want.hash] = true |
117 | } else { |
118 | var err = new Error("Unknown thing", want.type, want.hash) |
119 | return readWantHave(err, function (e) { cb(e || err) }) |
120 | } |
121 | readWantHave(null, next) |
122 | }) |
123 | } |
124 | |
125 | function readHave(abort, cb) { |
126 | // Read upload haves (haves list). |
127 | // On first obj-id that we have, ACK |
128 | // If we have none, NAK. |
129 | if (abort) return |
130 | if (gotHaves) return cb(true) |
131 | readWantHave(null, function next(end, have) { |
132 | if (end === true) { // done |
133 | gotHaves = true |
134 | if (!acked) { |
135 | cb(null, 'NAK') |
136 | } else { |
137 | cb(true) |
138 | } |
139 | } else if (have.type === 'flush-pkt') { |
140 | // found no common object |
141 | if (!acked) { |
142 | cb(null, 'NAK') |
143 | } else { |
144 | readWantHave(null, next) |
145 | } |
146 | } else if (end) |
147 | cb(end) |
148 | else if (have.type != 'have') |
149 | cb(new Error('Unknown have' + JSON.stringify(have))) |
150 | else { |
151 | haves[have.hash] = true |
152 | if (acked) { |
153 | readWantHave(null, next) |
154 | } else if (repo.hasObjectQuick) { |
155 | gotHasObject(null, repo.hasObjectQuick(have.hash)) |
156 | } else { |
157 | repo.hasObjectFromAny(have.hash, gotHasObject) |
158 | } |
159 | } |
160 | function gotHasObject(err, haveIt) { |
161 | if (err) return cb(err) |
162 | if (!haveIt) return readWantHave(null, next) |
163 | acked = true |
164 | cb(null, 'ACK ' + have.hash) |
165 | } |
166 | }) |
167 | } |
168 | |
169 | function readPack(abort, cb) { |
170 | if (sendPack) return sendPack(abort, cb) |
171 | if (abort || aborted) return console.error('abrt', abort || aborted), cb(abort || aborted) |
172 | // send pack file to client |
173 | if (!hasWants) return cb(true) |
174 | if (options.verbosity >= 2) { |
175 | console.error('wants', wants) |
176 | } |
177 | repo.getPack(wants, haves, options, function (err, _sendPack) { |
178 | if (err) return cb(err) |
179 | sendPack = _sendPack |
180 | sendPack(null, cb) |
181 | }) |
182 | } |
183 | |
184 | // Packfile negotiation |
185 | return cat([ |
186 | pktLine.encode(cat([ |
187 | sendRefs, |
188 | pull.once(''), |
189 | readWant, |
190 | readHave |
191 | ])), |
192 | readPack |
193 | ]) |
194 | } |
195 | |
196 | // through stream to show a progress bar for objects being read |
197 | function progressObjects(options) { |
198 | // Only show progress bar if it is requested and if it won't interfere with |
199 | // the debug output |
200 | if (!options.progress || options.verbosity > 1) { |
201 | var dummyProgress = function (readObject) { return readObject } |
202 | dummyProgress.setNumObjects = function () {} |
203 | return dummyProgress |
204 | } |
205 | |
206 | var numObjects |
207 | var size = process.stderr.columns |
208 | var bar = new ProgressBar(':percent :bar', { |
209 | total: size, |
210 | clear: true |
211 | }) |
212 | |
213 | var progress = function (readObject) { |
214 | return function (abort, cb) { |
215 | readObject(abort, function next(end, object) { |
216 | if (end === true) { |
217 | bar.terminate() |
218 | } else if (!end) { |
219 | var name = object.type + ' ' + object.length |
220 | bar.tick(size / numObjects) |
221 | } |
222 | |
223 | cb(end, object) |
224 | }) |
225 | } |
226 | } |
227 | // TODO: put the num objects in the objects stream as a header object |
228 | progress.setNumObjects = function (n) { |
229 | numObjects = n |
230 | } |
231 | return progress |
232 | } |
233 | |
234 | // Get a line for each ref that we have. The first line also has capabilities. |
235 | // Wrap with pktLine.encode. |
236 | function receivePackHeader(capabilities, refSource, symrefs) { |
237 | var hasRefs = false |
238 | var first = true |
239 | var symrefed = {} |
240 | var symrefsObj = {} |
241 | |
242 | return cat([ |
243 | function (end, cb) { |
244 | if (end) cb(true) |
245 | else if (!symrefs) cb(true) |
246 | else pull( |
247 | symrefs, |
248 | pull.map(function (sym) { |
249 | symrefed[sym.ref] = true |
250 | symrefsObj[sym.name] = sym.ref |
251 | return 'symref=' + sym.name + ':' + sym.ref |
252 | }), |
253 | pull.collect(function (err, symrefCaps) { |
254 | if (err) return cb(err) |
255 | capabilities = capabilities.concat(symrefCaps) |
256 | cb(true) |
257 | }) |
258 | ) |
259 | }, |
260 | pull( |
261 | cat([refSource, pull.once(dummyCapsRef)]), |
262 | pull.map(function (ref) { |
263 | if (ref !== dummyCapsRef) hasRefs = true |
264 | else if (hasRefs) return [] |
265 | else return [ref] |
266 | |
267 | // insert symrefs next to the refs that they point to |
268 | var out = [ref] |
269 | if (ref.name in symrefed) |
270 | for (var symrefName in symrefsObj) |
271 | if (symrefsObj[symrefName] === ref.name) |
272 | out.push({name: symrefName, hash: ref.hash}) |
273 | return out |
274 | }), |
275 | pull.flatten(), |
276 | pull.map(function (ref) { |
277 | var name = ref.name |
278 | var value = ref.hash |
279 | if (first) { |
280 | first = false |
281 | name += '\0' + capabilities.join(' ') |
282 | } |
283 | return value + ' ' + name |
284 | }) |
285 | ) |
286 | ]) |
287 | } |
288 | |
289 | // receive-pack: push from client |
290 | function receivePack(read, repo, options) { |
291 | var serverCaps = [ |
292 | agentCap, |
293 | 'delete-refs', |
294 | 'quiet', |
295 | 'no-thin' |
296 | ] |
297 | if (repo.setPushOptions) serverCaps.push('push-options') |
298 | var sendRefs = receivePackHeader(serverCaps, repo.refs(), null) |
299 | var done = multicb({pluck: 1}) |
300 | |
301 | var clientCaps = {} |
302 | |
303 | function onCaps(caps) { |
304 | clientCaps = caps |
305 | if (options.verbosity >= 2) { |
306 | console.error('client capabilities:', caps) |
307 | } |
308 | } |
309 | |
310 | return pktLine.encode( |
311 | cat([ |
312 | // send our refs |
313 | sendRefs, |
314 | pull.once(''), |
315 | function (abort, cb) { |
316 | if (abort) return |
317 | // receive their refs |
318 | var lines = pktLine.decode(read, { |
319 | onCaps: onCaps, |
320 | verbosity: options.verbosity |
321 | }) |
322 | pull( |
323 | lines.updates, |
324 | pull.collect(function (err, updates) { |
325 | if (err) return cb(err) |
326 | if (updates.length === 0) return cb(true) |
327 | var usePushOpts = clientCaps['push-options'] |
328 | pull( |
329 | usePushOpts ? lines.pktLineStrs : pull.empty(), |
330 | pull.reduce(function (opts, opt) { |
331 | opts[opt] = true |
332 | return opts |
333 | }, {}, pushOptsCb) |
334 | ) |
335 | function pushOptsCb(err, pushOpts) { |
336 | if (err) return cb(err) |
337 | repo.setPushOptions(pushOpts) |
338 | var progress = progressObjects(options) |
339 | |
340 | var hasPack = !updates.every(function (update) { |
341 | return update.new === null |
342 | }) |
343 | if (repo.uploadPack) { |
344 | if (!hasPack) { |
345 | repo.uploadPack(pull.values(updates), pull.empty(), done()) |
346 | } else { |
347 | var idxCb = done() |
348 | pull(lines.passthrough, indexPack(function (err, idx, packfileFixed) { |
349 | if (err) return idxCb(err) |
350 | repo.uploadPack(pull.values(updates), pull.once({ |
351 | pack: pull( |
352 | packfileFixed, |
353 | // for some reason i was getting zero length buffers which |
354 | // were causing muxrpc to fail, so remove them here. |
355 | pull.filter(function (buf) { |
356 | return buf.length |
357 | }) |
358 | ), |
359 | idx: idx |
360 | }), idxCb) |
361 | })) |
362 | } |
363 | } else { |
364 | repo.update(pull.values(updates), !hasPack ? pull.empty() : pull( |
365 | lines.passthrough, |
366 | pack.decode({ |
367 | verbosity: options.verbosity, |
368 | onHeader: function (numObjects) { |
369 | progress.setNumObjects(numObjects) |
370 | } |
371 | }, repo, done()), |
372 | progress |
373 | ), done()) |
374 | } |
375 | |
376 | done(function (err) { |
377 | cb(err || true) |
378 | }) |
379 | } |
380 | }) |
381 | ) |
382 | }, |
383 | pull.once('unpack ok') |
384 | ]) |
385 | ) |
386 | } |
387 | |
388 | function prepend(data, read) { |
389 | var done |
390 | return function (end, cb) { |
391 | if (done) { |
392 | read(end, cb) |
393 | } else { |
394 | done = true |
395 | cb(end, data) |
396 | } |
397 | } |
398 | } |
399 | |
400 | module.exports = function (repo) { |
401 | var ended |
402 | var options = { |
403 | verbosity: +process.env.GIT_VERBOSITY || 1, |
404 | progress: false |
405 | } |
406 | |
407 | repo = Repo(repo) |
408 | |
409 | function handleConnect(cmd, read) { |
410 | var args = util.split2(cmd) |
411 | switch (args[0]) { |
412 | case 'git-upload-pack': |
413 | return prepend('\n', uploadPack(read, repo, options)) |
414 | case 'git-receive-pack': |
415 | return prepend('\n', receivePack(read, repo, options)) |
416 | default: |
417 | return pull.error(new Error('Unknown service ' + args[0])) |
418 | } |
419 | } |
420 | |
421 | function handleCommand(line, read) { |
422 | var args = util.split2(line) |
423 | switch (args[0]) { |
424 | case 'capabilities': |
425 | return capabilitiesSource() |
426 | case 'list': |
427 | return listRefs(refSource) |
428 | case 'connect': |
429 | return handleConnect(args[1], read) |
430 | case 'option': |
431 | return optionSource(args[1], options) |
432 | default: |
433 | return pull.error(new Error('Unknown command ' + line)) |
434 | } |
435 | } |
436 | |
437 | return function (read) { |
438 | var b = buffered() |
439 | if (options.verbosity >= 3) { |
440 | read = pull.through(function (data) { |
441 | console.error('>', JSON.stringify(data.toString('ascii'))) |
442 | })(read) |
443 | } |
444 | b(read) |
445 | |
446 | var command |
447 | |
448 | function getCommand(cb) { |
449 | b.lines(null, function next(end, line) { |
450 | if (ended = end) |
451 | return cb(end) |
452 | |
453 | if (line == '') |
454 | return b.lines(null, next) |
455 | |
456 | if (options.verbosity > 1) |
457 | console.error('command:', line) |
458 | |
459 | var cmdSource = handleCommand(line, b.passthrough) |
460 | cb(null, cmdSource) |
461 | }) |
462 | } |
463 | |
464 | return function next(abort, cb) { |
465 | if (ended) return cb(ended) |
466 | |
467 | if (!command) { |
468 | if (abort) return |
469 | getCommand(function (end, cmd) { |
470 | command = cmd |
471 | next(end, cb) |
472 | }) |
473 | return |
474 | } |
475 | |
476 | command(abort, function (err, data) { |
477 | if (err) { |
478 | command = null |
479 | if (err !== true) |
480 | cb(err, data) |
481 | else |
482 | next(abort, cb) |
483 | } else { |
484 | if (options.verbosity >= 3) { |
485 | console.error('<', JSON.stringify(data)) |
486 | } |
487 | cb(null, data) |
488 | } |
489 | }) |
490 | } |
491 | } |
492 | } |
493 |
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