git ssb

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/* eslint-disable require-atomic-updates */
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import { exists, mkdirp, readFile, remove, stat } from 'fs-extra';
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import { log, wasReported } from './log.js';
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import { need, system } from 'pkg-fetch';
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import assert from 'assert';
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import help from './help';
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import { isPackageJson } from '../prelude/common.js';
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import minimist from 'minimist';
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import packer from './packer.js';
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import path from 'path';
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import { plusx } from './chmod.js';
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import producer from './producer.js';
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import refine from './refiner.js';
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import { shutdown } from './fabricator.js';
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import { version } from '../package.json';
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import walk from './walker.js';
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function isConfiguration (file) {
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  return isPackageJson(file) || file.endsWith('.config.json');
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}
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// http://www.openwall.com/lists/musl/2012/12/08/4
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const { hostArch, hostPlatform, isValidNodeRange, knownArchs,
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  knownPlatforms, toFancyArch, toFancyPlatform } = system;
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const hostNodeRange = 'node' + process.version.match(/^v(\d+)/)[1];
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function parseTargets (items) {
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  // [ 'node6-macos-x64', 'node6-linux-x64' ]
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  const targets = [];
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  for (const item of items) {
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    const target = {
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      nodeRange: hostNodeRange,
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      platform: hostPlatform,
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      arch: hostArch
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    };
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    if (item !== 'host') {
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      for (const token of item.split('-')) {
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        if (!token) continue;
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        if (isValidNodeRange(token)) {
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          target.nodeRange = token;
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          continue;
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        }
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        const p = toFancyPlatform(token);
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        if (knownPlatforms.indexOf(p) >= 0) {
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          target.platform = p;
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          continue;
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        }
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        const a = toFancyArch(token);
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        if (knownArchs.indexOf(a) >= 0) {
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          target.arch = a;
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          continue;
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        }
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        throw wasReported(`Unknown token '${token}' in '${item}'`);
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      }
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    }
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    targets.push(target);
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  }
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  return targets;
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}
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function stringifyTarget (target) {
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  const { nodeRange, platform, arch } = target;
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  return `${nodeRange}-${platform}-${arch}`;
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}
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function differentParts (targets) {
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  const nodeRanges = {};
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  const platforms = {};
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  const archs = {};
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  for (const target of targets) {
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    nodeRanges[target.nodeRange] = true;
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    platforms[target.platform] = true;
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    archs[target.arch] = true;
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  }
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  const result = {};
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  if (Object.keys(nodeRanges).length > 1) {
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    result.nodeRange = true;
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  }
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  if (Object.keys(platforms).length > 1) {
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    result.platform = true;
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  }
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  if (Object.keys(archs).length > 1) {
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    result.arch = true;
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  }
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  return result;
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}
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function stringifyTargetForOutput (output, target, different) {
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  const a = [ output ];
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  if (different.nodeRange) a.push(target.nodeRange);
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  if (different.platform) a.push(target.platform);
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  if (different.arch) a.push(target.arch);
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  return a.join('-');
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}
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function fabricatorForTarget (target) {
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  const { nodeRange, arch } = target;
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  return { nodeRange, platform: hostPlatform, arch };
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}
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const dryRunResults = {};
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async function needWithDryRun (target) {
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  const target2 = Object.assign({ dryRun: true }, target);
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  const result = await need(target2);
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  assert([ 'exists', 'fetched', 'built' ].indexOf(result) >= 0);
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  dryRunResults[result] = true;
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}
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const targetsCache = {};
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async function needViaCache (target) {
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  const s = stringifyTarget(target);
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  let c = targetsCache[s];
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  if (c) return c;
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  c = await need(target);
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  targetsCache[s] = c;
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  return c;
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}
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export async function exec (argv2) { // eslint-disable-line complexity
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  const argv = minimist(argv2, {
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    boolean: [ 'b', 'build', 'bytecode', 'd', 'debug',
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      'h', 'help', 'public', 'v', 'version' ],
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    string: [ '_', 'c', 'config', 'o', 'options', 'output',
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      'public-packages',
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      't', 'target', 'targets', 'bin-name' ],
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    default: { bytecode: true, public: true }
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  });
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  if (argv.h || argv.help) {
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    help();
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    return;
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  }
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  // version
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  if (argv.v || argv.version) {
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    console.log(version);
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    return;
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  }
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  log.info(`ssb-pkg@${version}`);
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  // debug
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  log.debugMode = argv.d || argv.debug;
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  // forceBuild
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  const forceBuild = argv.b || argv.build;
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  // _
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  if (!argv._.length) {
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    throw wasReported('Entry file/directory is expected', [
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      'Pass --help to see usage information' ]);
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  }
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  if (argv._.length > 1) {
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    throw wasReported('Not more than one entry file/directory is expected');
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  }
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  // input
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  let input = path.resolve(argv._[0]);
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  if (!await exists(input)) {
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    throw wasReported('Input file does not exist', [ input ]);
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  }
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  if ((await stat(input)).isDirectory()) {
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    input = path.join(input, 'package.json');
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    if (!await exists(input)) {
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      throw wasReported('Input file does not exist', [ input ]);
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    }
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  }
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  // inputJson
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  let inputJson, inputJsonName;
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  if (isConfiguration(input)) {
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    inputJson = JSON.parse(await readFile(input));
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    inputJsonName = inputJson.name;
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    if (inputJsonName) {
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      inputJsonName = inputJsonName.split('/').pop(); // @org/foo
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    }
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  }
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  // inputBin, binName, otherBins
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  let inputBin, binName, otherBins;
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  if (inputJson) {
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    let bin = inputJson.bin;
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    if (bin) {
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      if (typeof bin === 'object') {
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        if (bin[inputJsonName]) {
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          binName = inputJsonName
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          bin = bin[inputJsonName];
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        } else {
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          binName = Object.keys(bin)[0]
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          bin = bin[binName]
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        }
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        otherBins = {}
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        var dir = path.dirname(input)
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        for (var name in inputJson.bin) {
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          if (name !== binName) {
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            otherBins[name] = path.resolve(dir, inputJson.bin[name])
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          }
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        }
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      } else {
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        binName = inputJsonName
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      }
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      inputBin = path.resolve(path.dirname(input), bin);
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      if (!await exists(inputBin)) {
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        throw wasReported('Bin file does not exist (taken from package.json ' +
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          '\'bin\' property)', [ inputBin ]);
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      }
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    }
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  }
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  if (!binName) {
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    if (argv['bin-name']) {
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      binName = argv['bin-name']
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    } else {
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      throw wasReported('Missing binary name. Use --bin-name <name> or use package.json with \'bin\' property');
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    }
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  }
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  if (inputJson && !inputBin) {
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    throw wasReported('Property \'bin\' does not exist in', [ input ]);
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  }
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  // inputFin
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  const inputFin = inputBin || input;
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  // config
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  let config = argv.c || argv.config;
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  if (inputJson && config) {
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    throw wasReported('Specify either \'package.json\' or config. Not both');
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  }
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  // configJson
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  let configJson;
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  if (config) {
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    config = path.resolve(config);
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    if (!await exists(config)) {
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      throw wasReported('Config file does not exist', [ config ]);
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    }
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    configJson = require(config); // may be either json or js
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    if (!configJson.name && !configJson.files &&
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        !configJson.dependencies && !configJson.pkg) { // package.json not detected
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      configJson = { pkg: configJson };
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    }
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  }
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  // output
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  let output = argv.o || argv.output;
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  let autoOutput = false;
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  if (!output) {
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    let name;
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    if (inputJson) {
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      name = inputJsonName;
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      if (!name) {
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        throw wasReported('Property \'name\' does not exist in', [ argv._[0] ]);
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      }
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    } else
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    if (configJson) {
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      name = configJson.name;
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    }
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    if (!name) {
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      name = path.basename(inputFin);
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    }
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    autoOutput = true;
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    const ext = path.extname(name);
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    output = name.slice(0, -ext.length || undefined);
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  } else {
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    output = path.resolve(output);
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  }
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  // targets
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  const sTargets = argv.t || argv.target || argv.targets || '';
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  if (typeof sTargets !== 'string') {
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    throw wasReported(`Something is wrong near ${JSON.stringify(sTargets)}`);
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  }
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  let targets = parseTargets(
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    sTargets.split(',').filter((t) => t)
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  );
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  if (!targets.length) {
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    let jsonTargets;
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    if (inputJson && inputJson.pkg) {
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      jsonTargets = inputJson.pkg.targets;
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    } else
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    if (configJson && configJson.pkg) {
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      jsonTargets = configJson.pkg.targets;
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    }
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    if (jsonTargets) {
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      targets = parseTargets(jsonTargets);
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    }
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  }
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  if (!targets.length) {
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    if (!autoOutput) {
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      targets = parseTargets([ 'host' ]);
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      assert(targets.length === 1);
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    } else {
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      targets = parseTargets([ 'linux', 'macos', 'win' ]);
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    }
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    log.info('Targets not specified. Assuming:',
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      `${targets.map(stringifyTarget).join(', ')}`);
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  }
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  // differentParts
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  const different = differentParts(targets);
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  // targets[].output
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  for (const target of targets) {
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    let file;
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    if (targets.length === 1) {
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      file = output;
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    } else {
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      file = stringifyTargetForOutput(output, target, different);
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    }
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    if (target.platform === 'win' &&
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        path.extname(file) !== '.exe') file += '.exe';
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  }
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  // bakes
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  const bakes = (argv.options || '').split(',')
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    .filter((bake) => bake).map((bake) => '--' + bake);
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  // fetch targets
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  const { bytecode } = argv;
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  let fabricator;
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  for (const target of targets) {
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    target.forceBuild = forceBuild;
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    await needWithDryRun(target);
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    const f = target.fabricator = fabricatorForTarget(target);
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    f.forceBuild = forceBuild;
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    if (bytecode) {
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      await needWithDryRun(f);
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    }
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  }
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  if (dryRunResults.fetched && !dryRunResults.built) {
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    log.info('Fetching base Node.js binaries to PKG_CACHE_PATH');
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  }
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  for (const target of targets) {
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    target.binaryPath = await needViaCache(target);
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    const f = target.fabricator;
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    if (bytecode) {
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      if (f && fabricator && (
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        f.nodeRange !== fabricator.nodeRange ||
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        f.arch !== fabricator.arch
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      )) {
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        throw new Error('If using bytecode, Node.js version and architecture must be same for all targets')
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      }
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      f.binaryPath = await needViaCache(f);
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      if (f.platform !== 'win') {
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        await plusx(f.binaryPath);
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      }
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    }
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    fabricator = f
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  }
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  // marker
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  let marker;
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  if (configJson) {
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    marker = {
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      config: configJson,
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      base: path.dirname(config),
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      configPath: config
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    };
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  } else {
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    marker = {
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      config: inputJson || {},  // not `inputBin` because only `input`
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      base: path.dirname(input), // is the place for `inputJson`
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      configPath: input
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    };
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  }
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  marker.toplevel = true;
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  // public
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  const params = {};
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  if (argv.public) {
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    params.publicToplevel = true;
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    params.publicPackages = [ '*' ];
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  }
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  if (argv['public-packages']) {
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    params.publicPackages = argv['public-packages'].split(',');
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    if (params.publicPackages.indexOf('*') !== -1) {
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      params.publicPackages = [ '*' ];
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    }
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  }
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  // records
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  let records;
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  let entrypoint = inputFin;
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  let otherEntrypoints = otherBins
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  const addition = isConfiguration(input) ? input : undefined;
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  const walkResult = await walk(marker, entrypoint, addition, params, targets, otherEntrypoints);
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  entrypoint = walkResult.entrypoint;
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  records = walkResult.records;
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  const refineResult = refine(records, entrypoint, otherEntrypoints);
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  entrypoint = refineResult.entrypoint;
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  otherEntrypoints = refineResult.otherEntrypoints;
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  records = refineResult.records;
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  const backpack = packer({ records, entrypoint, bytecode, otherEntrypoints });
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  log.debug('Targets:', JSON.stringify(targets, null, 2));
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  if (await exists(output)) {
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    if ((await stat(output)).isFile()) {
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      await remove(output);
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    } else {
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      throw wasReported('Refusing to overwrite non-file output', [ output ]);
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    }
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  } else {
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    await mkdirp(path.dirname(output));
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  }
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  // TODO
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  // const slash = target.platform === 'win' ? '\\' : '/';
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  const slash = '/';
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  await producer({ backpack, bakes, slash, targets, fabricator, output, binName });
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  if (hostPlatform !== 'win') {
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    await plusx(output);
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  }
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  shutdown();
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}
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