| index.jsView |
|---|
| 1 | +var packCodec = require('js-git/lib/pack-codec') |
| 2 | +var pull = require('pull-stream') |
| 3 | +var cat = require('pull-cat') |
| 4 | +var pushable = require('pull-pushable') |
| 5 | +var buffered = require('pull-buffered') |
| 6 | + |
| 7 | +var options = { |
| 8 | + verbosity: 1, |
| 9 | + progress: false |
| 10 | +} |
| 11 | + |
| 12 | +function handleOption(name, value) { |
| 13 | + switch (name) { |
| 14 | + case 'verbosity': |
| 15 | + options.verbosity = +value || 0 |
| 16 | + |
| 17 | + return true |
| 18 | + case 'progress': |
| 19 | + options.progress = !!value && value !== 'false' |
| 20 | + return true |
| 21 | + default: |
| 22 | + console.error('unknown option', name + ': ' + value) |
| 23 | + return false |
| 24 | + } |
| 25 | +} |
| 26 | + |
| 27 | +function capabilitiesCmd(read) { |
| 28 | + read(null, function next(end, data) { |
| 29 | + if(end === true) return |
| 30 | + if(end) throw end |
| 31 | + |
| 32 | + console.log(data) |
| 33 | + read(null, next) |
| 34 | + }) |
| 35 | +} |
| 36 | + |
| 37 | + |
| 38 | + |
| 39 | +function endSource(data) { |
| 40 | + var done |
| 41 | + return function (end, cb) { |
| 42 | + if (done) return cb(true) |
| 43 | + done = true |
| 44 | + cb(null, data) |
| 45 | + } |
| 46 | +} |
| 47 | + |
| 48 | +function capabilitiesSource(prefix) { |
| 49 | + return endSource([ |
| 50 | + 'option', |
| 51 | + 'connect', |
| 52 | + 'refspec refs/heads/*:refs/' + prefix + '/heads/*', |
| 53 | + 'refspec refs/tags/*:refs/' + prefix + '/tags/*', |
| 54 | + ].join('\n') + '\n\n') |
| 55 | +} |
| 56 | + |
| 57 | +function split2(str) { |
| 58 | + var i = str.indexOf(' ') |
| 59 | + return (i === -1) ? [str, ''] : [ |
| 60 | + str.substr(0, i), |
| 61 | + str.substr(i + 1) |
| 62 | + ] |
| 63 | +} |
| 64 | + |
| 65 | +function optionSource(cmd) { |
| 66 | + var args = split2(cmd) |
| 67 | + var msg = handleOption(args[0], args[1]) |
| 68 | + msg = (msg === true) ? 'ok' |
| 69 | + : (msg === false) ? 'unsupported' |
| 70 | + : 'error ' + msg |
| 71 | + return endSource(msg + '\n') |
| 72 | +} |
| 73 | + |
| 74 | +function listSource() { |
| 75 | + return endSource([ |
| 76 | + |
| 77 | + ].join('\n') + '\n\n') |
| 78 | +} |
| 79 | + |
| 80 | +function createHash() { |
| 81 | + var hash = crypto.createHash('sha256') |
| 82 | + var hasher = pull.through(function (data) { |
| 83 | + hash.update(data) |
| 84 | + }, function () { |
| 85 | + hasher.digest = '&'+hash.digest('base64')+'.sha256' |
| 86 | + }) |
| 87 | + return hasher |
| 88 | +} |
| 89 | + |
| 90 | +function uploadPack(read) { |
| 91 | + return function (abort, cb) { |
| 92 | + cb('upload pack not implemented') |
| 93 | + } |
| 94 | + |
| 95 | +} |
| 96 | + |
| 97 | +function getRefs() { |
| 98 | + return pull.values([ |
| 99 | + { |
| 100 | + hash: '78beaedba9878623cea3862cf18e098cfb901e10', |
| 101 | + name: 'refs/heads/master' |
| 102 | + }, |
| 103 | + { |
| 104 | + hash: '78beaedba9878623cea3862cf18e098cfb901e10', |
| 105 | + name: 'refs/remotes/cel/master' |
| 106 | + } |
| 107 | + ]) |
| 108 | + |
| 109 | + return function (err, cb) { |
| 110 | + if (err === true) return |
| 111 | + if (err) throw err |
| 112 | + |
| 113 | + cb(true) |
| 114 | + } |
| 115 | + */ |
| 116 | +} |
| 117 | + |
| 118 | +function packLineEncode(read) { |
| 119 | + var ended |
| 120 | + return function (end, cb) { |
| 121 | + if (ended) return cb(ended) |
| 122 | + read(end, function (end, data) { |
| 123 | + if (ended = end) { |
| 124 | + cb(end) |
| 125 | + } else { |
| 126 | + var len = data ? data.length + 5 : 0 |
| 127 | + cb(end, ('000' + len.toString(16)).substr(-4) + data + '\n') |
| 128 | + } |
| 129 | + }) |
| 130 | + } |
| 131 | +} |
| 132 | + |
| 133 | +function packLineDecode(read) { |
| 134 | + var b = buffered(read) |
| 135 | + var readPrefix = b.chunks(4) |
| 136 | + var ended |
| 137 | + |
| 138 | + b.packLines = function (abort, cb) { |
| 139 | + readPrefix(abort, function (end, buf) { |
| 140 | + if (ended = end) return cb(end) |
| 141 | + var len = parseInt(buf, 16) |
| 142 | + b.chunks(len)(null, function (end, buf) { |
| 143 | + if (ended = end) return cb(end) |
| 144 | + console.error('refline', buf) |
| 145 | + cb(end, buf) |
| 146 | + }) |
| 147 | + }) |
| 148 | + } |
| 149 | + |
| 150 | + return b |
| 151 | +} |
| 152 | + |
| 153 | + |
| 154 | +TODO: investigate capabilities |
| 155 | +report-status delete-refs side-band-64k quiet atomic ofs-delta |
| 156 | +*/ |
| 157 | + |
| 158 | + |
| 159 | + |
| 160 | +function receivePackHeader(capabilities) { |
| 161 | + var readRef = getRefs() |
| 162 | + var first = true |
| 163 | + var ended |
| 164 | + return function (abort, cb) { |
| 165 | + if (ended) return cb(true) |
| 166 | + readRef(abort, function (end, ref) { |
| 167 | + ended = end |
| 168 | + var name = ref && ref.name |
| 169 | + var hash = ref && ref.hash |
| 170 | + if (first) { |
| 171 | + first = false |
| 172 | + if (end) { |
| 173 | + |
| 174 | + hash = '0000000000000000000000000000000000000000' |
| 175 | + name = 'capabilities^{}' |
| 176 | + } |
| 177 | + name += '\0' + capabilities.join(' ') |
| 178 | + } else if (end) { |
| 179 | + return cb(true) |
| 180 | + } |
| 181 | + cb(null, hash + ' ' + name) |
| 182 | + }) |
| 183 | + } |
| 184 | +} |
| 185 | + |
| 186 | +function receiveActualPack(read, objectSink, onEnd) { |
| 187 | + var objects = pushable() |
| 188 | + packCodec.decodePack(function (obj) { |
| 189 | + if (obj) pushable.push(obj) |
| 190 | + else pushable.end() |
| 191 | + }) |
| 192 | + objectSink(objects) |
| 193 | +} |
| 194 | + |
| 195 | +function receivePack(read, objectSink) { |
| 196 | + var ended |
| 197 | + var sendRefs = receivePackHeader([]) |
| 198 | + |
| 199 | + function receiveRefs(readLine, cb) { |
| 200 | + var refs = [] |
| 201 | + readLine(null, function next(end, line) { |
| 202 | + if (end === true) |
| 203 | + cb(new Error('refs line ended early')) |
| 204 | + else if (end) |
| 205 | + cb(end) |
| 206 | + else if (line === '') |
| 207 | + cb(null, refs) |
| 208 | + else { |
| 209 | + var args = split2(line) |
| 210 | + refs.push({ |
| 211 | + hash: args[0], |
| 212 | + name: args[1] |
| 213 | + }) |
| 214 | + readLine(null, next) |
| 215 | + } |
| 216 | + }) |
| 217 | + } |
| 218 | + |
| 219 | + return packLineEncode( |
| 220 | + cat([ |
| 221 | + |
| 222 | + sendRefs, |
| 223 | + pull.once(''), |
| 224 | + function (abort, cb) { |
| 225 | + if (abort) return |
| 226 | + |
| 227 | + var lines = packLineDecode(read) |
| 228 | + receiveRefs(lines.packLines, function (err, refs) { |
| 229 | + if (refs) |
| 230 | + console.error('refs', refs, err) |
| 231 | + if (err) return cb(err) |
| 232 | + |
| 233 | + receiveActualPack(lines.passthrough, objectSink, function (err) { |
| 234 | + if (err) return cb(err) |
| 235 | + cb(true) |
| 236 | + }) |
| 237 | + }) |
| 238 | + }, |
| 239 | + pull.once('unpack ok') |
| 240 | + ]) |
| 241 | + ) |
| 242 | +} |
| 243 | + |
| 244 | +function prepend(data, read) { |
| 245 | + var done |
| 246 | + return function (end, cb) { |
| 247 | + if (done) { |
| 248 | + read(end, cb) |
| 249 | + } else { |
| 250 | + done = true |
| 251 | + cb(null, data) |
| 252 | + } |
| 253 | + } |
| 254 | +} |
| 255 | + |
| 256 | +module.exports = function (opts) { |
| 257 | + var ended |
| 258 | + var prefix = opts.prefix |
| 259 | + var objectSink = opts.objectSink |
| 260 | + |
| 261 | + function handleConnect(cmd, read) { |
| 262 | + var args = split2(cmd) |
| 263 | + switch (args[0]) { |
| 264 | + case 'git-upload-pack': |
| 265 | + return prepend('\n', uploadPack(read)) |
| 266 | + case 'git-receive-pack': |
| 267 | + return prepend('\n', receivePack(read), objectSink) |
| 268 | + default: |
| 269 | + return pull.error(new Error('Unknown service ' + args[0])) |
| 270 | + } |
| 271 | + } |
| 272 | + |
| 273 | + function handleCommand(line, read) { |
| 274 | + var args = split2(line) |
| 275 | + switch (args[0]) { |
| 276 | + case 'capabilities': |
| 277 | + return capabilitiesSource(prefix) |
| 278 | + case 'list': |
| 279 | + return listSource() |
| 280 | + case 'connect': |
| 281 | + return handleConnect(args[1], read) |
| 282 | + case 'option': |
| 283 | + return optionSource(args[1]) |
| 284 | + default: |
| 285 | + return pull.error(new Error('Unknown command ' + args[0])) |
| 286 | + } |
| 287 | + } |
| 288 | + |
| 289 | + return function (read) { |
| 290 | + var b = buffered() |
| 291 | + b(read) |
| 292 | + var command |
| 293 | + |
| 294 | + function getCommand(cb) { |
| 295 | + b.lines(null, function (end, line) { |
| 296 | + if (ended = end) |
| 297 | + return cb(end) |
| 298 | + |
| 299 | + if (options.verbosity > 1) |
| 300 | + console.error('command:', line) |
| 301 | + |
| 302 | + var cmdSource = handleCommand(line, b.passthrough) |
| 303 | + cb(null, cmdSource) |
| 304 | + }) |
| 305 | + } |
| 306 | + |
| 307 | + return function next(abort, cb) { |
| 308 | + if (ended) return cb(ended) |
| 309 | + |
| 310 | + if (!command) { |
| 311 | + if (abort) return |
| 312 | + getCommand(function (end, cmd) { |
| 313 | + command = cmd |
| 314 | + next(end, cb) |
| 315 | + }) |
| 316 | + return |
| 317 | + } |
| 318 | + |
| 319 | + command(abort, function (err, data) { |
| 320 | + if (err) { |
| 321 | + command = null |
| 322 | + if (err !== true) |
| 323 | + cb(err, data) |
| 324 | + else |
| 325 | + next(abort, cb) |
| 326 | + } else { |
| 327 | + cb(null, data) |
| 328 | + } |
| 329 | + }) |
| 330 | + } |
| 331 | + } |
| 332 | +} |
| 333 | + |