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module.exports = readJson
readJson.processJson = processJson
var fs = require("./graceful-fs")
, semver = require("./semver")
, path = require("path")
, log = require("./log")
, cache = {}
, timers = {}
function readJson (jsonFile, opts, cb) {
if (typeof cb !== "function") cb = opts, opts = {}
if (cache.hasOwnProperty(jsonFile)) {
log.verbose(jsonFile, "from cache")
return cb(null, cache[jsonFile])
}
fs.readFile(path.join(path.dirname(jsonFile), "wscript"), function (er, data) {
opts.file = jsonFile
if (er) opts.wscript = false
else opts.wscript = data.toString().match(/(^|\n)def build\b/)
&& data.toString().match(/(^|\n)def configure\b/)
fs.readFile(jsonFile, processJson(opts, cb))
})
}
function processJson (opts, cb) {
if (typeof cb !== "function") cb = opts, opts = {}
if (typeof cb !== "function") {
var thing = cb, cb = null
return P(null, thing)
} else return P
function P (er, thing) {
if (er) {
if (cb) return cb(er, thing)
throw er
}
if (typeof thing === "object" && !Buffer.isBuffer(thing)) {
return processObject(opts, cb)(er, thing)
} else {
return processJsonString(opts, cb)(er, thing)
}
}
}
function processJsonString (opts, cb) { return function (er, jsonString) {
jsonString += ""
if (er) return cb(er, jsonString)
var json
try {
json = JSON.parse(jsonString)
} catch (ex2) { try {
json = process.binding("evals").Script.runInNewContext("(\n"+jsonString+"\n)")
} catch (ex) {
var e = new Error(
"Failed to parse json\n"+ex.message+"\n"+ex2.message+"\n"+jsonString)
if (cb) return cb(e)
throw e
}}
return processObject(opts, cb)(er, json)
}}
function processObject (opts, cb) { return function (er, json) {
if (json.overlay) {
;["node", "npm"].forEach(function (k) {
if (!json.overlay[k]) return undefined
for (var i in json.overlay[k]) json[i] = json.overlay[k][i]
})
}
// slashes would be a security risk.
// anything else will just fail harmlessly.
if (!json.name) {
var e = new Error("No 'name' field found in package.json")
if (cb) return cb(e)
throw e
}
json.name = json.name.trim()
if (json.name.charAt(0) === "." || json.name.match(/[\/@\s]/)) {
var msg = "Invalid name: "
+ JSON.stringify(json.name)
+ " may not start with '.' or contain '/' or '@'"
, e = new Error(msg)
if (cb) return cb(e)
throw e
}
var tag = opts.tag
if (tag && tag.indexOf(json.version) === 0) {
tag = tag.substr(json.version.length)
}
if (tag && tag.indexOf("-1-LINK") !== -1) {
tag = tag.substr(tag.indexOf("-1-LINK"))
}
if (tag && semver.valid(json.version + tag)) {
json.version += tag
}
// FIXME: uncomment in 0.3.0, once it's not likely that people will
// have a bunch of main.js files kicking around any more, and remove
// this functionality from lib/build.js
//
// if (json.main) {
// if (!json.modules) json.modules = {}
// json.modules.index = json.main
// delete json.main
// }
if (opts.wscript) {
var scripts = json.scripts = json.scripts || {}
if (!scripts.install && !scripts.preinstall) {
// don't fail if it was unexpected, just try.
scripts.preinstall = "node-waf configure build"
}
}
if (!(semver.valid(json.version))) {
var e = new Error("Invalid version: "+json.version)
if (cb) return cb(e)
throw e
}
if (json.main) json.main = json.main.replace(/(\.js|\.node)$/, '')
if (json.bin && typeof json.bin === "string") {
var b = {}
b[ path.basename( json.bin ) ] = json.bin
json.bin = b
}
if (json["dev-dependencies"] && !json.devDependencies) {
json.devDependencies = json["dev-dependencies"]
delete json["dev-dependencies"]
}
;["dependencies", "devDependencies"].forEach(function (d) {
if (!json[d]) return
json[d] = depObjectify(json[d])
})
json._id = json.name+"@"+json.version
json = testEngine(json)
json = parsePeople(json)
if (opts.file) {
log.verbose(opts.file, "caching")
cache[opts.file] = json
// just in case this is a long-running process...
clearTimeout(timers[opts.file])
timers[opts.file] = setTimeout(function () {
delete cache[opts.file]
delete timers[opts.file]
}, 1000 * 60 * 60 * 24)
}
if (cb) cb(null,json)
return json
}}
function depObjectify (deps) {
if (!Array.isArray(deps)) return deps
var o = {}
deps.forEach(function (d) { o[d] = "*" })
return o
}
function testEngine (json) {
if (!json.engines) json.engines = { "node" : "*" }
var nodeVer = process.version.replace(/\+$/, '')
, ok = false
if (Array.isArray(json.engines)) {
// Packages/1.0 commonjs style, with an array.
// hack it to just hang a "node" member with the version range,
// then do the npm-style check below.
for (var i = 0, l = json.engines.length; i < l; i ++) {
var e = json.engines[i].trim()
if (e.substr(0, 4) === "node") {
json.engines.node = e.substr(4)
break
}
}
}
if (json.engines.node === "") json.engines.node = "*"
json._nodeSupported = semver.satisfies(nodeVer, json.engines.node || "undefined")
return json
}
function parsePeople (json) {
if (json.author) json.author = parsePerson(json.author)
;["maintainers", "contributors"].forEach(function (set) {
if (Array.isArray(json[set])) json[set] = json[set].map(parsePerson)
})
return json
}
function parsePerson (person) {
if (typeof person !== "string") return person
var name = person.match(/^([^\(<]+)/)
, url = person.match(/\(([^\)]+)\)/)
, email = person.match(/<([^>]+)>/)
, obj = { "name" : (name && name[0] || person).trim() }
if (email) obj.email = email[1]
if (url) obj.url = url[1]
return obj
}
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