--- /dev/null
+// commands for packing and unpacking tarballs
+// this file is used by lib/cache.js
+
+var npm = require("../npm.js")
+ , fs = require("graceful-fs")
+ , writeFileAtomic = require("write-file-atomic")
+ , writeStreamAtomic = require("fs-write-stream-atomic")
+ , path = require("path")
+ , log = require("npmlog")
+ , uidNumber = require("uid-number")
+ , rm = require("./gently-rm.js")
+ , readJson = require("read-package-json")
+ , myUid = process.getuid && process.getuid()
+ , myGid = process.getgid && process.getgid()
+ , tar = require("tar")
+ , zlib = require("zlib")
+ , fstream = require("fstream")
+ , Packer = require("fstream-npm")
+ , lifecycle = require("./lifecycle.js")
+
+if (process.env.SUDO_UID && myUid === 0) {
+ if (!isNaN(process.env.SUDO_UID)) myUid = +process.env.SUDO_UID
+ if (!isNaN(process.env.SUDO_GID)) myGid = +process.env.SUDO_GID
+}
+
+exports.pack = pack
+exports.unpack = unpack
+
+function pack (tarball, folder, pkg, dfc, cb) {
+ log.verbose("tar pack", [tarball, folder])
+ if (typeof cb !== "function") cb = dfc, dfc = false
+
+ log.verbose("tarball", tarball)
+ log.verbose("folder", folder)
+
+ if (dfc) {
+ // do fancy crap
+ return lifecycle(pkg, "prepublish", folder, function (er) {
+ if (er) return cb(er)
+ pack_(tarball, folder, pkg, cb)
+ })
+ } else {
+ pack_(tarball, folder, pkg, cb)
+ }
+}
+
+function pack_ (tarball, folder, pkg, cb) {
+ new Packer({ path: folder, type: "Directory", isDirectory: true })
+ .on("error", function (er) {
+ if (er) log.error("tar pack", "Error reading " + folder)
+ return cb(er)
+ })
+
+ // By default, npm includes some proprietary attributes in the
+ // package tarball. This is sane, and allowed by the spec.
+ // However, npm *itself* excludes these from its own package,
+ // so that it can be more easily bootstrapped using old and
+ // non-compliant tar implementations.
+ .pipe(tar.Pack({ noProprietary: !npm.config.get("proprietary-attribs") }))
+ .on("error", function (er) {
+ if (er) log.error("tar.pack", "tar creation error", tarball)
+ cb(er)
+ })
+ .pipe(zlib.Gzip())
+ .on("error", function (er) {
+ if (er) log.error("tar.pack", "gzip error "+tarball)
+ cb(er)
+ })
+ .pipe(writeStreamAtomic(tarball))
+ .on("error", function (er) {
+ if (er) log.error("tar.pack", "Could not write "+tarball)
+ cb(er)
+ })
+ .on("close", cb)
+}
+
+
+function unpack (tarball, unpackTarget, dMode, fMode, uid, gid, cb) {
+ log.verbose("tar", "unpack", tarball)
+ log.verbose("tar", "unpacking to", unpackTarget)
+ if (typeof cb !== "function") cb = gid, gid = null
+ if (typeof cb !== "function") cb = uid, uid = null
+ if (typeof cb !== "function") cb = fMode, fMode = npm.modes.file
+ if (typeof cb !== "function") cb = dMode, dMode = npm.modes.exec
+
+ uidNumber(uid, gid, function (er, uid, gid) {
+ if (er) return cb(er)
+ unpack_(tarball, unpackTarget, dMode, fMode, uid, gid, cb)
+ })
+}
+
+function unpack_ ( tarball, unpackTarget, dMode, fMode, uid, gid, cb ) {
+ rm(unpackTarget, function (er) {
+ if (er) return cb(er)
+ // gzip {tarball} --decompress --stdout \
+ // | tar -mvxpf - --strip-components=1 -C {unpackTarget}
+ gunzTarPerm( tarball, unpackTarget
+ , dMode, fMode
+ , uid, gid
+ , function (er, folder) {
+ if (er) return cb(er)
+ readJson(path.resolve(folder, "package.json"), cb)
+ })
+ })
+}
+
+
+function gunzTarPerm (tarball, target, dMode, fMode, uid, gid, cb_) {
+ if (!dMode) dMode = npm.modes.exec
+ if (!fMode) fMode = npm.modes.file
+ log.silly("gunzTarPerm", "modes", [dMode.toString(8), fMode.toString(8)])
+
+ var cbCalled = false
+ function cb (er) {
+ if (cbCalled) return
+ cbCalled = true
+ cb_(er, target)
+ }
+
+ var fst = fs.createReadStream(tarball)
+
+ fst.on("open", function (fd) {
+ fs.fstat(fd, function (er, st) {
+ if (er) return fst.emit("error", er)
+ if (st.size === 0) {
+ er = new Error("0-byte tarball\n" +
+ "Please run `npm cache clean`")
+ fst.emit("error", er)
+ }
+ })
+ })
+
+ // figure out who we're supposed to be, if we're not pretending
+ // to be a specific user.
+ if (npm.config.get("unsafe-perm") && process.platform !== "win32") {
+ uid = myUid
+ gid = myGid
+ }
+
+ function extractEntry (entry) {
+ log.silly("gunzTarPerm", "extractEntry", entry.path)
+ // never create things that are user-unreadable,
+ // or dirs that are user-un-listable. Only leads to headaches.
+ var originalMode = entry.mode = entry.mode || entry.props.mode
+ entry.mode = entry.mode | (entry.type === "Directory" ? dMode : fMode)
+ entry.mode = entry.mode & (~npm.modes.umask)
+ entry.props.mode = entry.mode
+ if (originalMode !== entry.mode) {
+ log.silly( "gunzTarPerm", "modified mode"
+ , [entry.path, originalMode, entry.mode])
+ }
+
+ // if there's a specific owner uid/gid that we want, then set that
+ if (process.platform !== "win32" &&
+ typeof uid === "number" &&
+ typeof gid === "number") {
+ entry.props.uid = entry.uid = uid
+ entry.props.gid = entry.gid = gid
+ }
+ }
+
+ var extractOpts = { type: "Directory", path: target, strip: 1 }
+
+ if (process.platform !== "win32" &&
+ typeof uid === "number" &&
+ typeof gid === "number") {
+ extractOpts.uid = uid
+ extractOpts.gid = gid
+ }
+
+ var sawIgnores = {}
+ extractOpts.filter = function () {
+ // symbolic links are not allowed in packages.
+ if (this.type.match(/^.*Link$/)) {
+ log.warn( "excluding symbolic link"
+ , this.path.substr(target.length + 1)
+ + " -> " + this.linkpath )
+ return false
+ }
+
+ // Note: This mirrors logic in the fs read operations that are
+ // employed during tarball creation, in the fstream-npm module.
+ // It is duplicated here to handle tarballs that are created
+ // using other means, such as system tar or git archive.
+ if (this.type === "File") {
+ var base = path.basename(this.path)
+ if (base === ".npmignore") {
+ sawIgnores[ this.path ] = true
+ } else if (base === ".gitignore") {
+ var npmignore = this.path.replace(/\.gitignore$/, ".npmignore")
+ if (sawIgnores[npmignore]) {
+ // Skip this one, already seen.
+ return false
+ } else {
+ // Rename, may be clobbered later.
+ this.path = npmignore
+ this._path = npmignore
+ }
+ }
+ }
+
+ return true
+ }
+
+
+ fst
+ .on("error", function (er) {
+ if (er) log.error("tar.unpack", "error reading "+tarball)
+ cb(er)
+ })
+ .on("data", function OD (c) {
+ // detect what it is.
+ // Then, depending on that, we'll figure out whether it's
+ // a single-file module, gzipped tarball, or naked tarball.
+ // gzipped files all start with 1f8b08
+ if (c[0] === 0x1F &&
+ c[1] === 0x8B &&
+ c[2] === 0x08) {
+ fst
+ .pipe(zlib.Unzip())
+ .on("error", function (er) {
+ if (er) log.error("tar.unpack", "unzip error "+tarball)
+ cb(er)
+ })
+ .pipe(tar.Extract(extractOpts))
+ .on("entry", extractEntry)
+ .on("error", function (er) {
+ if (er) log.error("tar.unpack", "untar error "+tarball)
+ cb(er)
+ })
+ .on("close", cb)
+ } else if (hasTarHeader(c)) {
+ // naked tar
+ fst
+ .pipe(tar.Extract(extractOpts))
+ .on("entry", extractEntry)
+ .on("error", function (er) {
+ if (er) log.error("tar.unpack", "untar error "+tarball)
+ cb(er)
+ })
+ .on("close", cb)
+ } else {
+ // naked js file
+ var jsOpts = { path: path.resolve(target, "index.js") }
+
+ if (process.platform !== "win32" &&
+ typeof uid === "number" &&
+ typeof gid === "number") {
+ jsOpts.uid = uid
+ jsOpts.gid = gid
+ }
+
+ fst
+ .pipe(fstream.Writer(jsOpts))
+ .on("error", function (er) {
+ if (er) log.error("tar.unpack", "copy error "+tarball)
+ cb(er)
+ })
+ .on("close", function () {
+ var j = path.resolve(target, "package.json")
+ readJson(j, function (er, d) {
+ if (er) {
+ log.error("not a package", tarball)
+ return cb(er)
+ }
+ writeFileAtomic(j, JSON.stringify(d) + "\n", cb)
+ })
+ })
+ }
+
+ // now un-hook, and re-emit the chunk
+ fst.removeListener("data", OD)
+ fst.emit("data", c)
+ })
+}
+
+function hasTarHeader (c) {
+ return c[257] === 0x75 && // tar archives have 7573746172 at position
+ c[258] === 0x73 && // 257 and 003030 or 202000 at position 262
+ c[259] === 0x74 &&
+ c[260] === 0x61 &&
+ c[261] === 0x72 &&
+
+ ((c[262] === 0x00 &&
+ c[263] === 0x30 &&
+ c[264] === 0x30) ||
+
+ (c[262] === 0x20 &&
+ c[263] === 0x20 &&
+ c[264] === 0x00))
+}
Code Review / simantics / district.git / blobdiff