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var npm = require('npm');
var npmi = require('npmi');
var semver = require('semver');
var Immutable = require('immutable');
var Promise = require('../utils/promise');
var Plugin = require('../models/plugin');
var gitbook = require('../gitbook');
var npmIsReady;
/**
Initialize and prepare NPM
@return {Promise}
*/
function initNPM() {
if (npmIsReady) return npmIsReady;
npmIsReady = Promise.nfcall(npm.load, {
silent: true,
loglevel: 'silent'
});
return npmIsReady;
}
/**
Resolve a plugin to a version
@param {Plugin}
@return {Promise<String>}
*/
function resolveVersion(plugin) {
var npmId = Plugin.nameToNpmID(plugin.getName());
var requiredVersion = plugin.getVersion();
return initNPM()
.then(function() {
return Promise.nfcall(npm.commands.view, [npmId + '@' + requiredVersion, 'engines'], true);
})
.then(function(versions) {
versions = Immutable.Map(versions).entries().toList();
var result = versions
.map(function(entry) {
return {
version: entry[0],
gitbook: (entry[1].engines || {}).gitbook
};
})
.filter(function(v) {
return v.gitbook && gitbook.satisfies(v.gitbook);
})
.sort(function(v1, v2) {
return semver.lt(v1.version, v2.version)? 1 : -1;
})
.get(0);
if (!result) {
return undefined;
} else {
return result.get('version');
}
});
}
/**
Install a plugin for a book
@param {Book}
@param {Plugin}
@return {Promise}
*/
function installPlugin(book, plugin) {
var logger = book.getLogger();
var installFolder = book.getRoot();
var name = plugin.getName();
var requirement = plugin.getVersion();
logger.info.ln('installing plugin', name);
// Find a version to install
return resolveVersion(plugin)
.then(function(version) {
if (!version) {
throw new Error('Found no satisfactory version for plugin "' + name + '" with requirement "' + requirement + '"');
}
logger.info.ln('install plugin "' + plugin +'" from NPM with version', requirement);
return Promise.nfcall(npmi, {
'name': plugin.getNpmID(),
'version': version,
'path': installFolder,
'npmLoad': {
'loglevel': 'silent',
'loaded': true,
'prefix': installFolder
}
});
})
.then(function() {
logger.info.ok('plugin "' + plugin + '" installed with success');
});
}
/**
Install plugin requirements for a book
@param {Book}
@param {OrderedMap<String:Plugin>}
@return {Promise}
*/
function installPlugins(book, plugins) {
return Promise.forEach(plugins, function(plugin) {
return installPlugin(book, plugin);
});
}
module.exports = installPlugins;
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