git ssb

1
#!/usr/bin/env node
2
3
var fs = require('fs')
4
var path = require('path')
5
var URL = require('url')
6
var http = require('http')
7
var https = require('https')
8
var crypto = require('crypto')
9
var readline = require('readline')
10
var os = require('os')
11
12
var ssbClient = require('ssb-client')
13
var pull = require('pull-stream')
14
15
var pkg = require('./package')
16
17
var userAgentBase = pkg.name + '/' + pkg.version
18
var userAgentContact
19
var userAgentBot = false
20
21
function estimateMessageSize(content) {
22
  var draftMsg = {
23
    key: '%0000000000000000000000000000000000000000000=.sha256',
24
    value: {
25
      previous: '%0000000000000000000000000000000000000000000=.sha256',
26
      author: '@0000000000000000000000000000000000000000000=.ed25519',
27
      sequence: 100000,
28
      timestamp: 1000000000000.0001,
29
      hash: 'sha256',
30
      content: content,
31
      signature: '00000000000000000000000000000000000000000000000000000000000000000000000000000000000000==.sig.ed25519'
32
    }
33
  }
34
  return JSON.stringify(draftMsg, null, 2).length
35
}
36
37
function mapCollect(fn) {
38
  var aborted
39
  return function (read) {
40
    var queue = []
41
    return function (abort, cb) {
42
      if (aborted = abort) return read(abort, cb)
43
      read(null, function next(end, data) {
44
        if (end) return cb(end)
45
        queue.push(data)
46
        var result = fn(queue)
47
        if (result) read(null, next)
48
      })
49
    }
50
  }
51
}
52
53
function getJson(url, cb) {
54
  var opts = URL.parse(url)
55
  opts.headers = {
56
    'User-Agent': userAgentBase
57
      + (userAgentContact ? ' (' + userAgentContact + ')' : '')
58
      + (userAgentBot ? ' bot' : '')
59
  }
60
  var h = opts.protocol === 'https:' ? https : http
61
  h.get(opts, function (res) {
62
    if (res.statusCode !== 200) return cb(new Error('HTTP ' + res.statusCode + ' ' + res.statusMessage))
63
    var bufs = []
64
    res.on('data', function (buf) {
65
      bufs.push(buf)
66
    })
67
    res.on('end', function () {
68
      res.removeListener('error', cb)
69
      var buf = Buffer.concat(bufs)
70
      bufs = null
71
      var data
72
      try {
73
        data = JSON.parse(buf.toString('utf8'))
74
      } catch(e) {
75
        return cb(e)
76
      }
77
      cb(null, data)
78
    })
79
    res.on('error', cb)
80
  })
81
}
82
83
function publishDrafts(sbot, drafts, cb) {
84
  var draftIdIndex = {}
85
  drafts.forEach(function (draft, i) {
86
    draftIdIndex[draft.draftId] = i
87
  })
88
  var ids = []
89
90
  function replaceDraftIds(obj) {
91
    if (typeof obj === 'string') {
92
      var i = draftIdIndex[obj]
93
      if (typeof i === 'number') {
94
        var id = ids[i]
95
        if (!id) throw new ReferenceError('draft referernces unknown message')
96
        return id
97
      }
98
    } else if (Array.isArray(obj)) {
99
      return obj.map(replaceDraftIds)
100
    } else if (obj !== null && typeof obj === 'object') {
101
      var o = {}
102
      for (var k in obj) o[k] = replaceDraftIds(obj[k])
103
      return o
104
    }
105
    return obj
106
  }
107
108
  pull(
109
    pull.values(drafts),
110
    pull.asyncMap(function (draft, cb) {
111
      var content = replaceDraftIds(draft.content)
112
      sbot.publish(content, function (err, msg) {
113
        if (err) return cb(err)
114
        ids.push(msg.key)
115
        cb(null, msg)
116
      })
117
    }),
118
    pull.collect(cb)
119
  )
120
}
121
122
var args = process.argv.slice(2)
123
var yes = false
124
var dry = false
125
var help = false
126
var urls = []
127
args.forEach(function (arg) {
128
  if (arg[0] === '-') switch (arg) {
129
    case '-n': return dry = true
130
    case '-y': return yes = true
131
    case '-h': return help = true
132
    default: throw 'Unknown argument: ' + arg
133
  } else urls.push(arg)
134
})
135
136
if (help) {
137
  process.stdout.write(fs.readFileSync(path.join(__dirname, 'usage.txt')))
138
  process.exit(0)
139
}
140
141
ssbClient(function (err, sbot, config) {
142
  if (err) throw err
143
  var conf = config.wikimedia || {}
144
  userAgentContact = conf.contact
145
  userAgentBot = conf.bot
146
147
  if (urls.length === 0) {
148
    var pagesFile = path.join(config.path, 'wikimedia-pages.txt')
149
    var pagesData = fs.readFileSync(pagesFile, 'utf8')
150
    urls = pagesData.split('\n').filter(RegExp.prototype.test.bind(/[^#]/))
151
    if (!urls.length) {
152
      console.log('No pages to sync.')
153
      return sbot.close()
154
    }
155
  }
156
157
  var pagesInfo = urls.map(function (page) {
158
    var m = /^(https?:\/\/.*?)(\/wiki)?\/(.*)$/.exec(page)
159
    if (!m) throw 'Unable to parse page URL ' + page
160
    return {
161
      site: m[1] + '/',
162
      api: m[1] + (m[2] ? '/w' : '/wiki') + '/api.php',
163
      title: m[3]
164
    }
165
  })
166
  var pagesInfoByApi = {}
167
  pagesInfo.forEach(function (pageInfo) {
168
    var infos = pagesInfoByApi[pageInfo.api] || (pagesInfoByApi[pageInfo.api] = [])
169
    infos.push(pageInfo)
170
  })
171
  console.log('Normalizing titles...')
172
  var waiting = 0
173
  for (var api in pagesInfoByApi) (function (api) {
174
    var pagesInfoForApi = pagesInfoByApi[api]
175
    var pagesInfoForApiByTitle = {}
176
    var titles = pagesInfoForApi.map(function (info) {
177
      pagesInfoForApiByTitle[info.title] = info
178
      return info.title
179
    })
180
    var url = api + '?format=json&action=query' +
181
      '&titles=' + encodeURIComponent('\x1f' + titles.join('\x1f')) +
182
      '&' // trailing & needed for some reason
183
    waiting++
184
    getJson(url, function (err, data) {
185
      if (err) throw err
186
      if (data.warnings) console.trace('Warnings:', data.warnings)
187
      if (data.query.normalized) data.query.normalized.forEach(function (norm) {
188
        var info = pagesInfoForApiByTitle[norm.from]
189
        if (!info) {
190
          console.error(JSON.stringify({titles: titles, response: data}, 0, 2))
191
          throw new Error('Unexpected title in server response')
192
        }
193
        // console.log('Normalized title', norm.from, norm.to)
194
        info.title = norm.to
195
      })
196
      if (!--waiting) next()
197
    })
198
  }(api))
199
200
  function next() {
201
    console.log('Getting revisions...')
202
    var userHashes = {}
203
    pull(
204
      pull.values(pagesInfo),
205
      pull.asyncMap(function (pageInfo, cb) {
206
        // Calculate blob id for page URL + title, for linking
207
        pull(
208
          pull.once(pageInfo.site + '\t' + pageInfo.title),
209
          sbot.blobs.add(function (err, hash) {
210
            pageInfo.hash = hash
211
            cb(null, pageInfo)
212
          })
213
        )
214
      }),
215
      pull.asyncMap(function (pageInfo, cb) {
216
        // Get previous messages for this page.
217
        // Simple solution: find the revision with latest timestamp.
218
        var maxRevTs = ''
219
        var maxRevMsgId
220
        pull(
221
          sbot.links({
222
            dest: pageInfo.hash,
223
            rel: 'pageId',
224
            values: true,
225
            meta: false
226
          }),
227
          pull.filter(function (msg) {
228
            var c = msg && msg.value && msg.value.content
229
            return c
230
              && c.type === 'wikimedia/revisions'
231
              && c.site === pageInfo.site
232
              && c.title === pageInfo.title
233
          }),
234
          pull.drain(function (msg) {
235
            var c = msg && msg.value && msg.value.content
236
            var revs = Array.isArray(c.revisions) && c.revisions
237
            if (revs) revs.forEach(function (rev) {
238
              if (rev && rev.timestamp > maxRevTs) {
239
                maxRevTs = rev.timestamp
240
                maxRevMsgId == msg.key
241
              }
242
            })
243
          }, function (err) {
244
            if (err) return cb(err)
245
            pageInfo.latestMsgId = maxRevMsgId
246
            pageInfo.latestRevTs = maxRevTs
247
            cb(null, pageInfo)
248
          })
249
        )
250
      }),
251
      pull.map(function (pageInfo) {
252
        // Get new revisions.
253
        var rvcontinue, rvdone
254
        var rvstart = pageInfo.latestRevTs
255
        var prevId = pageInfo.latestMsgId
256
        var aborted
257
        var revisions = pull(
258
          function (abort, cb) {
259
            if (aborted = abort) return cb(abort)
260
            if (rvdone) return cb(true)
261
            console.log('Getting revisions for', pageInfo.title + '...',
262
              rvstart || '', rvcontinue || '')
263
            var url = api + '?format=json&action=query&prop=revisions&rvslots=*'
264
              + '&titles=' + encodeURIComponent(pageInfo.title)
265
              + '&rvprop=ids|timestamp|comment|user|sha1|size|slotsha1|slotsize|content|roles|flags|tags'
266
              + '&rvdir=newer'
267
              + (rvcontinue ? '&rvcontinue=' + rvcontinue : '')
268
              + (rvstart ? '&rvstart=' + rvstart : '')
269
              + '&rvlimit=50'
270
            getJson(url, function (err, data) {
271
              if (aborted) return err && console.trace(err)
272
              if (err) return cb(err)
273
274
              var warnings = data.warnings
275
              if (warnings) {
276
                if (warnings.main) {
277
                  if (warnings.main['*'] === 'Unrecognized parameter: rvslots.') {
278
                    delete warnings.main['*']
279
                    if (Object.keys(warnings.main).length === 0) {
280
                      delete warnings.main
281
                    }
282
                  }
283
                }
284
                if (warnings.revisions) {
285
                  if (warnings.revisions['*'] === 'Unrecognized values for parameter "rvprop": slotsha1, slotsize, roles.') {
286
                    delete warnings.revisions['*']
287
                    if (Object.keys(warnings.revisions).length === 0) {
288
                      delete warnings.revisions
289
                    }
290
                  }
291
                }
292
                if (Object.keys(warnings).length > 0) {
293
                  console.trace('Warnings:', warnings)
294
                }
295
              }
296
297
              rvcontinue = data.continue && data.continue.rvcontinue
298
              if (!rvcontinue) rvdone = true
299
              var page
300
              if (data.query) for (var pageid in data.query.pages) {
301
                page = data.query.pages[pageid]
302
                if (page.title === pageInfo.title) break
303
                else page = null
304
              }
305
              if (!page) {
306
                console.trace(data.query.pages, pageInfo)
307
                return cb(new Error('Unable to find page'))
308
              }
309
              var revs = page.revisions || []
310
              console.log('Got ' + revs.length + ' revisions')
311
              cb(null, revs)
312
            })
313
          },
314
          pull.flatten(),
315
316
          pull.through(function (rev) {
317
            if (!rev.slots) {
318
               // old API does not use slots.
319
               // Transform result to be forward-compatible.
320
              rev.slots = {
321
                main: {
322
                  size: rev.size,
323
                  sha1: rev.sha1,
324
                  contentmodel: rev.contentmodel,
325
                  contentformat: rev.contentformat,
326
                  '*': rev['*']
327
                }
328
              }
329
              delete rev.contentmodel
330
              delete rev.contentformat
331
              delete rev['*']
332
            }
333
            // duplicate values supplied in new API in slotsize and slotsha1
334
            delete rev.sha1
335
            delete rev.size
336
          }),
337
338
          pull.asyncMap(function (rev, cb) {
339
            // Calculate blob id for user page URL + title, for linking
340
            var hash = userHashes[rev.user]
341
            if (hash) {
342
              rev.userId = hash
343
              return cb(null, rev)
344
            }
345
            pull(
346
              pull.once(pageInfo.site + '\tUser:' + rev.user),
347
              sbot.blobs.add(function (err, hash) {
348
                rev.userId = userHashes[rev.user] = hash
349
                cb(null, rev)
350
              })
351
            )
352
          }),
353
          pull.asyncMap(function (rev, cb) {
354
            var waiting = 0
355
            for (var slot in rev.slots) (function (slot) {
356
              waiting++
357
              var slotInfo = rev.slots[slot]
358
              var content = slotInfo['*']
359
              if (!content) {
360
                console.trace(slotInfo)
361
                return cb(new Error('Missing content'))
362
              }
363
              var sha1 = crypto.createHash('sha1').update(content).digest('hex')
364
              if (sha1 !== slotInfo.sha1) {
365
                console.trace(slotInfo, sha1)
366
                return cb(new Error('Mismatched content sha1'))
367
              }
368
              pull(
369
                pull.once(content),
370
                sbot.blobs.add(function (err, hash) {
371
                  if (err) return cb(err)
372
                  slotInfo.link = hash
373
                  delete slotInfo['*']
374
                  if (!--waiting) cb(null, rev)
375
                })
376
              )
377
            }(slot))
378
          })
379
        )
380
381
        var queuedRevisions = []
382
        var ended
383
        function cbDraft(content, cb) {
384
          if (!content.revisions.length) {
385
            console.log('No revisions for', pageInfo.title)
386
            return cb(true)
387
          }
388
          console.log('Prepared a message',
389
            'with', content.revisions.length, 'revisions',
390
            'for', pageInfo.title)
391
          prevId = '%' + crypto.createHash('sha256').update(JSON.stringify(content)).digest('base64') + '.draft6'
392
          cb(null, {
393
            draftId: prevId,
394
            content: content
395
          })
396
        }
397
        return function (abort, cb) {
398
          if (abort) return revisions(abort, cb)
399
          if (ended) return cb(true)
400
          var content = {
401
            type: 'wikimedia/revisions',
402
            site: pageInfo.site,
403
            title: pageInfo.title,
404
            pageId: pageInfo.hash,
405
            parents: prevId ? [prevId] : undefined,
406
            revisions: queuedRevisions.splice(0)
407
          }
408
          revisions(null, function next(end, revision) {
409
            if (ended = end) return cbDraft(content, cb)
410
            content.revisions.push(revision)
411
            if (estimateMessageSize(content) > 8192) {
412
              queuedRevisions.push(content.revisions.pop())
413
              // console.log('filled msg for ', pageInfo.title, ' with ', content.revisions.length, 'revisions')
414
              return cbDraft(content, cb)
415
            }
416
            revisions(null, next)
417
          })
418
        }
419
      }),
420
      pull.flatten(),
421
      pull.collect(function (err, drafts) {
422
        if (err) throw err
423
        if (dry) {
424
          console.log(JSON.stringify(drafts, 0, 2))
425
          return sbot.close()
426
        }
427
        if (!drafts.length) {
428
          console.log('No messages to publish.')
429
          return sbot.close()
430
        }
431
        if (yes) return confirmed(true)
432
        var rl = readline.createInterface({
433
          input: process.stdin,
434
          output: process.stdout
435
        })
436
        rl.question('Publish ' + drafts.length + ' messages? [Y/n] ', function (answer) {
437
          rl.close()
438
          confirmed(!/^n/i.test(answer))
439
        })
440
        function confirmed(yes) {
441
          if (!yes) return sbot.close()
442
          publishDrafts(sbot, drafts, function (err, msgs) {
443
            if (err) throw err
444
            console.log('Published:\n' + msgs.map(function (msg) {
445
              return msg.key
446
            }.join('\n')))
447
            sbot.close()
448
          })
449
        }
450
      })
451
    )
452
  }
453
})
454