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get.js
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const usage = 'usage: node get.js <url|eula> [main|dev|yyyy.mm.dd]',
api = 'https://api.anaconda.org/package/shaktidb/shakti/files',
license = 'https://shakti.com/license',
headers = {Accept: 'application/json'};
const {get} = require('https'), {platform} = require('os'),
{log} = console, {argv, exit} = process;
const bail = m => {log(m); exit(1)}
const platform_is = p => x => x.attrs && x.attrs.platform === p;
const is_date = /^\d{4}\.\d{2}\.\d{2}$/.test;
const version_is = v => ['dev', 'main'].includes(v) ?
x => x.labels && x.labels.includes(v) : is_date(v) ?
x => x.version <= v : bail(usage);
const later = (x, y) => x.upload_time > y.upload_time ? x : y;
const parse_url = data => 'https:' + JSON.parse(data)
.filter(platform_is(({darwin:'osx',linux:'linux'})[platform()]))
.filter(version_is(argv[3] || 'dev')).reduce(later).download_url;
const parse_eula = x => x
.split('<body>', 2)[1]
.replace(/<\/p.*?>/g, '\n')
.replace(/<.*?>/g, '')
.replace(/\t/g, ' ').trim();
const p = (f, x) => {let data = '';
x.on('data', x => data += x).on('end', ()=>
{try{log(f(data))}catch(e){log("'version");exit(1);}});}
if (argv[2] == 'url') {
get(api, {headers}, p.bind(null, parse_url));
} else if (argv[2] == 'eula') {
get(license, {}, p.bind(null, parse_eula));
} else {
bail(usage);
}
//:~