四好公路
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var path = require('path')
var github = require('github-from-package')
var home = require('os-homedir')
var crypto = require('crypto')
var expandTemplate = require('expand-template')()
function getDownloadUrl (opts) {
var pkgName = opts.pkg.name.replace(/^@\w+\//, '')
return expandTemplate(urlTemplate(opts), {
name: pkgName,
package_name: pkgName,
version: opts.pkg.version,
major: opts.pkg.version.split('.')[0],
minor: opts.pkg.version.split('.')[1],
patch: opts.pkg.version.split('.')[2],
prerelease: opts.pkg.version.split('-')[1],
build: opts.pkg.version.split('+')[1],
abi: opts.abi || process.versions.modules,
node_abi: process.versions.modules,
runtime: opts.runtime || 'node',
platform: opts.platform,
arch: opts.arch,
libc: opts.libc || process.env.LIBC || '',
configuration: (opts.debug ? 'Debug' : 'Release'),
module_name: opts.pkg.binary && opts.pkg.binary.module_name,
tag_prefix: opts['tag-prefix'] || 'v'
})
}
function getApiUrl (opts) {
return github(opts.pkg).replace('github.com', 'api.github.com/repos') + '/releases'
}
function getAssetUrl (opts, assetId) {
return getApiUrl(opts) + '/assets/' + assetId
}
function urlTemplate (opts) {
if (typeof opts.download === 'string') {
return opts.download
}
var packageName = '{name}-v{version}-{runtime}-v{abi}-{platform}{libc}-{arch}.tar.gz'
var hostMirrorUrl = getHostMirrorUrl(opts)
if (hostMirrorUrl) {
return hostMirrorUrl + '/{tag_prefix}{version}/' + packageName
}
if (opts.pkg.binary && opts.pkg.binary.host) {
return [
opts.pkg.binary.host,
opts.pkg.binary.remote_path,
opts.pkg.binary.package_name || packageName
].map(function (path) {
return trimSlashes(path)
}).filter(Boolean).join('/')
}
return github(opts.pkg) + '/releases/download/{tag_prefix}{version}/' + packageName
}
function getHostMirrorUrl (opts) {
var propName = 'npm_config_' + (opts.pkg.name || '').replace(/-/g, '_') + '_binary_host'
return process.env[propName] || process.env[propName + '_mirror']
}
function trimSlashes (str) {
if (str) return str.replace(/^\.\/|^\/|\/$/g, '')
}
function cachedPrebuild (url) {
var digest = crypto.createHash('md5').update(url).digest('hex').slice(0, 6)
return path.join(prebuildCache(), digest + '-' + path.basename(url).replace(/[^a-zA-Z0-9.]+/g, '-'))
}
function npmCache () {
var env = process.env
return env.npm_config_cache || (env.APPDATA ? path.join(env.APPDATA, 'npm-cache') : path.join(home(), '.npm'))
}
function prebuildCache () {
return path.join(npmCache(), '_prebuilds')
}
function tempFile (cached) {
return cached + '.' + process.pid + '-' + Math.random().toString(16).slice(2) + '.tmp'
}
exports.getDownloadUrl = getDownloadUrl
exports.getApiUrl = getApiUrl
exports.getAssetUrl = getAssetUrl
exports.urlTemplate = urlTemplate
exports.cachedPrebuild = cachedPrebuild
exports.prebuildCache = prebuildCache
exports.npmCache = npmCache
exports.tempFile = tempFile