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// npm view [pkg [pkg ...]]
module.exports = view
view.usage = "npm view pkg[@version] [<field>[.subfield]...]"
view.completion = function (opts, cb) {
if (opts.conf.argv.remain.length <= 2) {
return registry.get("/-/short", cb)
}
// have the package, get the fields.
var tag = npm.config.get("tag")
registry.get(opts.conf.argv.remain[2], function (er, d) {
if (er) return cb(er)
var dv = d.versions[d["dist-tags"][tag]]
, fields = []
d.versions = Object.keys(d.versions).sort(semver.compare)
fields = getFields(d).concat(getFields(dv))
cb(null, fields)
})
function getFields (d, f, pref) {
f = f || []
if (!d) return f
pref = pref || []
Object.keys(d).forEach(function (k) {
if (k.charAt(0) === "_" || k.indexOf(".") !== -1) return
var p = pref.concat(k).join(".")
f.push(p)
if (Array.isArray(d[k])) {
return d[k].forEach(function (val, i) {
var pi = p + "[" + i + "]"
if (val && typeof val === "object") getFields(val, f, [p])
else f.push(pi)
})
}
if (typeof d[k] === "object") getFields(d[k], f, [p])
})
return f
}
}
var registry = require("./utils/npm-registry-client/index.js")
, ini = require("ini")
, log = require("./utils/log.js")
, util = require("util")
, output
, npm = require("./npm.js")
, semver = require("semver")
, readJson = require("./utils/read-json.js")
function view (args, silent, cb) {
if (typeof cb !== "function") cb = silent, silent = false
if (!args.length) return cb("Usage: "+view.usage)
var pkg = args.shift()
, nv = pkg.split("@")
, name = nv.shift()
, version = nv.join("@") || npm.config.get("tag")
if (name === ".") return cb(view.usage)
// get the data about this package
registry.get(name, null, 600, function (er, data) {
if (er) return cb(er)
if (data["dist-tags"].hasOwnProperty(version)) {
version = data["dist-tags"][version]
}
var results = []
, error = null
, versions = data.versions
data.versions = Object.keys(data.versions).sort(semver.compare)
if (!args.length) args = [""]
if (-1 === args.indexOf("readme")) {
delete data.readme
}
Object.keys(versions).forEach(function (v) {
try {
versions[v] = readJson.processJson(versions[v])
} catch (ex) {
delete versions[v]
}
if (semver.satisfies(v, version)) args.forEach(function (args) {
results.push(showFields(data, versions[v], args))
})
})
results = results.reduce(reducer, {})
var retval = results
if (args.length === 1 && args[0] === "") {
retval = cleanBlanks(retval)
log.silly(retval, "cleanup")
}
if (error || silent) cb(error, retval)
else printData(results, data._id, cb.bind(null, error, retval))
})
}
function cleanBlanks (obj) {
var clean = {}
Object.keys(obj).forEach(function (version) {
clean[version] = obj[version][""]
})
return clean
}
function reducer (l, r) {
if (r) Object.keys(r).forEach(function (v) {
l[v] = l[v] || {}
Object.keys(r[v]).forEach(function (t) {
l[v][t] = r[v][t]
})
})
return l
}
// return whatever was printed
function showFields (data, version, fields) {
var o = {}
;[data, version].forEach(function (s) {
Object.keys(s).forEach(function (k) {
o[k] = s[k]
})
})
return search(o, fields.split("."), version.version, fields)
}
function search (data, fields, version, title) {
var field
, tail = fields
while (!field && fields.length) field = tail.shift()
fields = [field].concat(tail)
if (!field && !tail.length) {
var o = {}
o[version] = {}
o[version][title] = data
return o
}
var index = field.match(/(.+)\[([^\]]+)\]$/)
if (index) {
field = index[1]
index = index[2]
if (data.field && data.field.hasOwnProperty(index)) {
return search(data[field][index], tail, version, title)
} else {
field = field + "[" + index + "]"
}
}
if (Array.isArray(data)) {
if (data.length === 1) {
return search(data[0], fields, version, title)
}
var results = []
, res = null
data.forEach(function (data, i) {
var tl = title.length
, newt = title.substr(0, tl-(fields.join(".").length) - 1)
+ "["+i+"]" + [""].concat(fields).join(".")
results.push(search(data, fields.slice(), version, newt))
})
results = results.reduce(reducer, {})
return results
}
if (!data.hasOwnProperty(field)) {
return
}
data = data[field]
if (tail.length) {
if (typeof data === "object") {
// there are more fields to deal with.
return search(data, tail, version, title)
} else {
return new Error("Not an object: "+data)
}
}
var o = {}
o[version] = {}
o[version][title] = data
return o
}
function printData (data, name, cb) {
var versions = Object.keys(data)
, msg = ""
, showVersions = versions.length > 1
, showFields
function cb_ (er) { return cb(er, data) }
versions.forEach(function (v, i) {
var fields = Object.keys(data[v])
showFields = showFields || (fields.length > 1)
fields.forEach(function (f) {
var d = cleanup(data[v][f])
if (showVersions || showFields || typeof d !== "string") {
d = util.inspect(cleanup(data[v][f]), false, 5, true)
}
if (f && showFields) f += " = "
if (d.indexOf("\n") !== -1) d = "\n" + d
msg += (showVersions ? name + "@" + v + " " : "")
+ (showFields ? f : "") + d + "\n"
})
})
output = output || require("./utils/output.js")
output.write(msg, cb_)
}
function cleanup (data) {
if (Array.isArray(data)) {
if (data.length === 1) {
data = data[0]
} else {
return data.map(cleanup)
}
}
if (!data || typeof data !== "object") return data
if (typeof data.versions === "object"
&& data.versions
&& !Array.isArray(data.versions)) {
data.versions = Object.keys(data.versions || {})
}
var keys = Object.keys(data)
keys.forEach(function (d) {
if (d.charAt(0) === "_") delete data[d]
else if (typeof data[d] === "object") data[d] = cleanup(data[d])
})
keys = Object.keys(data)
if (keys.length <= 3
&& data.name
&& (keys.length === 1
|| keys.length === 3 && data.email && data.url
|| keys.length === 2 && (data.email || data.url))) {
data = unparsePerson(data)
}
return data
}
function unparsePerson (d) {
if (typeof d === "string") return d
return d.name
+ (d.email ? " <"+d.email+">" : "")
+ (d.url ? " ("+d.url+")" : "")
}