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// npm view [pkg [pkg ...]]
module.exports = view
view.usage = "npm view pkg[@version] [<field>[.subfield]...]"
view.completion = function (args, index, cb) {
var registry = require("./utils/registry")
, getCompletions = require("./utils/completion/get-completions")
, remotePkgs = require("./utils/completion/remote-packages")
, name = args[0] || ""
, key = args[1] || ""
if (index < 3) remotePkgs(args, index, true, false, false, cb)
else if (index == 3) {
var pieces = name.split("@")
registry.get(pieces[0], pieces[1], function (er, d) {
var cur = d.versions ? d.versions[d["dist-tags"].latest] : d
, path = key.split(".")
, options
if (path.length > 1) {
for (var i = 0; i < path.length; i++) {
if (!cur) return cb()
if (!cur[path[i]]) break
else cur = cur[path[i]]
}
options = Object.keys(cur).map(function (e) {
return path.slice(0, path.length - 1).join(".") + "." + e
})
} else options = Object.keys(cur).concat(["ctime","mtime","maintainers"])
cb(null, getCompletions(key, options))
})
}
}
var registry = require("./utils/registry")
, ini = require("./utils/ini-parser")
, log = require("./utils/log")
, sys = require("./utils/sys")
, output = require("./utils/output")
, npm = require("../npm")
, semver = require("./utils/semver")
, readJson = require("./utils/read-json")
function view (args, cb) {
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")
// get the data about this package
registry.get(name, function (er, data) {
if (er) return cb(er)
if (data["dist-tags"].hasOwnProperty(version)) {
version = data["dist-tags"][version]
}
var results = []
, error = null
if (!args.length) args = [""]
Object.keys(data.versions).forEach(function (v) {
data.versions[v] = readJson.processJson(data.versions[v])
if (semver.satisfies(v, version)) args.forEach(function (args) {
results.push(showFields(data, data.versions[v], args))
})
})
results = results.reduce(reducer, {})
if (error) cb(error, results)
else printData(results, cb)
})
}
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._id, 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(/(.+)\[([0-9]+)\]$/)
if (index) {
field = index[1]
index = index[2]
if (Array.isArray(data[field]) && index < data[field].length) {
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, cb) {
var outfd = npm.config.get("outfd")
, 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 = sys.inspect(cleanup(data[v][f]), false, 5, true)
}
if (f && showFields) f += " = "
if (d.indexOf("\n") !== -1) f += "\n"
msg += (showVersions ? v + " " : "") + (showFields ? f : "") + d + "\n"
})
})
output.write(outfd, 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
delete 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+")" : "")
}
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