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index.js
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index.js
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var fs = require('fs')
var spawn = require('child_process').spawn
var path = require('path')
var readline = require('readline')
var mkdirp = require('mkdirp')
var yn = require('yn')
var series = require('run-series')
module.exports = function doRecipe ({ source, dest, recipe, key }, cb) {
dest = dest || '.'
cb = cb || function noop () {}
var scriptsRes
series((recipe.files || []).map(function (file) {
return function _file (cb) {
copyFile(source, dest, file, cb)
}
}).concat([
function _scripts (cb) {
// if (!recipe.scripts) return process.nextTick(function () {
// cb(null, {
// fields: 0,
// scripts:
// })
// })
pkgScripts(recipe, dest, key, function (err, res) {
if (err) return cb(err)
scriptsRes = res
})
},
function _install (cb) {
if (!recipe.devinstall) return process.nextTick(function () {
cb(null)
})
var args = ['install', '--save-dev'].concat(recipe.devinstall)
spawn('npm', args, {
stdio: 'inherit'
}).on('close', function (code) {
cb(null)
})
}
]), function allDone (err, res) {
if (err) return cb(err)
var filesN = (recipe.files || []).length
var filesSum = res.slice(0, filesN)
.filter(Boolean)
.reduce((sum, n) => sum + n, 0)
cb(null, {
filesCopied: filesSum,
packageFields: scriptsRes.fields,
scriptsInstalled: scriptsRes.scripts
})
})
}
function copyFile (source, dest, file, cb) {
var source = path.join(source, Array.isArray(file) ?
file[0] :
file)
var dest = path.join(dest, Array.isArray(file) ? file[1] : file)
fs.access(dest, fs.constants.F_OK, function (err) {
if (err) { // file does not exist, so write it
var dir = path.parse(dest).dir
return mkdirp(dir, function (err) {
if (err) return console.log('Error mkdirp ' + dir, err)
fs.createReadStream(source)
.pipe(fs.createWriteStream(dest))
.once('finish', cb.bind(null, null, 1))
.once('error', function (err) {
console.log('Error writing ' + dest, err)
cb(null)
})
})
}
// file exists, ask permission
var rl = createRl()
var q = `Overwrite file ${dest}? (y/n [n]) `
rl.question(q, function (resp) {
rl.close()
var write = yn(resp)
if (!write) {
cb(null, 0)
return console.log('not overwritten')
}
fs.createReadStream(source)
.once('error', function (err) {
console.log('Error reading ' + source, err)
})
.pipe(fs.createWriteStream(dest))
.once('finish', cb.bind(null, null, 1))
.once('error', function (err) {
console.log('Error writing ' + dest, err)
cb(null)
})
})
})
}
// return number of scripts installed
function pkgScripts (recipe, dest, recipeName, cb) {
var dest = dest || '.'
var pkg
try {
pkg = getPackageJson(dest)
} catch(err) {
cb(err)
return console.log('Invalid package.json', err)
}
// keys under 'package.json' in the recipe
Object.keys(recipe['package.json'] || {}).forEach(function (k) {
if (!pkg[k]) pkg[k] = {}
safeWriteJson(pkg[k], recipe['package.json'][k], recipeName)
})
// 'scripts' key, should be phased out
if (!pkg.scripts) pkg.scripts = {}
if (Object.keys(recipe.scripts || {}).length) {
safeWriteJson(pkg.scripts, recipe.scripts, recipeName)
}
var data = JSON.stringify(pkg, null, 2)
fs.writeFile(path.join(dest, './package.json'), data, function (err) {
if (err) console.log('Error writing package.json', err)
var fieldsN = Object.keys(recipe['package.json'] || {}).length
if ((recipe['package.json'] || {}).scripts) fieldsN--
var scriptsN = Object.keys((recipe['package.json'] || {}).scripts ||
{}).length
if ((recipe['package.json'] || {}).scripts) {
scriptsN += Object.keys(recipe['package.json'].scripts).length
}
cb(null, {
fields: fieldsN,
scripts: scriptsN
})
})
}
function createRl () {
return readline.createInterface({
input: process.stdin,
output: process.stdout
})
}
function safeWriteJson (obj, next, prefix) {
Object.keys(next).forEach(function (k) {
if (!obj[k]) {
obj[k] = next[k]
return
}
obj[k + '__' + prefix] = next[k]
})
}
function getPackageJson (dest) {
var dest = dest || '.'
var pkgData, pkg
try {
pkgData = fs.readFileSync(path.join(dest, 'package.json'))
} catch(err) {
pkg = {}
}
if (!pkg) pkg = JSON.parse(pkgData)
return pkg
}