1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 | 3x 3x 3x 3x 3x 3x 3x 3x 3x 70x 70x 1x 69x 1x 68x 1x 67x 67x 3x 26x 26x 26x 26x 26x 4x 2x 2x 24x 22x 22x 61x 63x 61x 2x 59x 2x 55x 55x 8x 47x 47x 2x 45x 45x 28x 18x 18x 26x 8x 3x 18x 18x 18x 3x 41x 41x 41x 37x 37x 4x 33x 37x 37x 8x 29x 29x 29x 112x 2x 110x 110x 6x 104x 2x 102x 4x 98x 98x 13x 85x 85x 4x 81x 81x 4x 77x 46x 77x 77x 29x 41x 41x 41x 41x 45x 4x 4x 41x 2x 39x 39x 2x 37x 37x 4x 33x 33x 33x 33x 33x 41x 41x 3x 18x 19x 1x 3x 18x 18x 3x 34x 33x 33x 1x 3x 1x 32x 33x | 'use strict' // tar -r const hlo = require('./high-level-opt.js') const Pack = require('./pack.js') const Parse = require('./parse.js') const fs = require('fs') const fsm = require('fs-minipass') const t = require('./list.js') const path = require('path') // starting at the head of the file, read a Header // If the checksum is invalid, that's our position to start writing // If it is, jump forward by the specified size (round up to 512) // and try again. // Write the new Pack stream starting there. const Header = require('./header.js') const r = module.exports = (opt_, files, cb) => { const opt = hlo(opt_) if (!opt.file) throw new TypeError('file is required') if (opt.gzip) throw new TypeError('cannot append to compressed archives') if (!files || !Array.isArray(files) || !files.length) throw new TypeError('no files or directories specified') files = Array.from(files) return opt.sync ? replaceSync(opt, files) : replace(opt, files, cb) } const replaceSync = (opt, files) => { const p = new Pack.Sync(opt) let threw = true let fd let position try { try { fd = fs.openSync(opt.file, 'r+') } catch (er) { if (er.code === 'ENOENT') fd = fs.openSync(opt.file, 'w+') else throw er } const st = fs.fstatSync(fd) const headBuf = Buffer.alloc(512) POSITION: for (position = 0; position < st.size; position += 512) { for (let bufPos = 0, bytes = 0; bufPos < 512; bufPos += bytes) { bytes = fs.readSync( fd, headBuf, bufPos, headBuf.length - bufPos, position + bufPos ) if (position === 0 && headBuf[0] === 0x1f && headBuf[1] === 0x8b) throw new Error('cannot append to compressed archives') if (!bytes) break POSITION } let h = new Header(headBuf) if (!h.cksumValid) break let entryBlockSize = 512 * Math.ceil(h.size / 512) if (position + entryBlockSize + 512 > st.size) break // the 512 for the header we just parsed will be added as well // also jump ahead all the blocks for the body position += entryBlockSize if (opt.mtimeCache) opt.mtimeCache.set(h.path, h.mtime) } threw = false streamSync(opt, p, position, fd, files) } finally { if (threw) try { fs.closeSync(fd) } catch (er) {} } } const streamSync = (opt, p, position, fd, files) => { const stream = new fsm.WriteStreamSync(opt.file, { fd: fd, start: position }) p.pipe(stream) addFilesSync(p, files) } const replace = (opt, files, cb) => { files = Array.from(files) const p = new Pack(opt) const getPos = (fd, size, cb_) => { const cb = (er, pos) => { if (er) fs.close(fd, _ => cb_(er)) else cb_(null, pos) } let position = 0 if (size === 0) return cb(null, 0) let bufPos = 0 const headBuf = Buffer.alloc(512) const onread = (er, bytes) => { if (er) return cb(er) bufPos += bytes if (bufPos < 512 && bytes) return fs.read( fd, headBuf, bufPos, headBuf.length - bufPos, position + bufPos, onread ) if (position === 0 && headBuf[0] === 0x1f && headBuf[1] === 0x8b) return cb(new Error('cannot append to compressed archives')) // truncated header if (bufPos < 512) return cb(null, position) const h = new Header(headBuf) if (!h.cksumValid) return cb(null, position) const entryBlockSize = 512 * Math.ceil(h.size / 512) if (position + entryBlockSize + 512 > size) return cb(null, position) position += entryBlockSize + 512 if (position >= size) return cb(null, position) if (opt.mtimeCache) opt.mtimeCache.set(h.path, h.mtime) bufPos = 0 fs.read(fd, headBuf, 0, 512, position, onread) } fs.read(fd, headBuf, 0, 512, position, onread) } const promise = new Promise((resolve, reject) => { p.on('error', reject) let flag = 'r+' const onopen = (er, fd) => { if (er && er.code === 'ENOENT' && flag === 'r+') { flag = 'w+' return fs.open(opt.file, flag, onopen) } if (er) return reject(er) fs.fstat(fd, (er, st) => { if (er) return reject(er) getPos(fd, st.size, (er, position) => { if (er) return reject(er) const stream = new fsm.WriteStream(opt.file, { fd: fd, start: position }) p.pipe(stream) stream.on('error', reject) stream.on('close', resolve) addFilesAsync(p, files) }) }) } fs.open(opt.file, flag, onopen) }) return cb ? promise.then(cb, cb) : promise } const addFilesSync = (p, files) => { files.forEach(file => { if (file.charAt(0) === '@') t({ file: path.resolve(p.cwd, file.substr(1)), sync: true, noResume: true, onentry: entry => p.add(entry) }) else p.add(file) }) p.end() } const addFilesAsync = (p, files) => { while (files.length) { const file = files.shift() if (file.charAt(0) === '@') return t({ file: path.resolve(p.cwd, file.substr(1)), noResume: true, onentry: entry => p.add(entry) }).then(_ => addFilesAsync(p, files)) else p.add(file) } p.end() } |