opusdev/vector-similarity-api

1module.exports = version;2module.exports.pin = pin;3 4var fs = require('fs');5var path = require('path');6var exec = require('child_process').exec;7var root = null;8 9function pin() {10  return version().then(function (v) {11    version.pinned = v;12  });13}14 15function version(callback) {16  // first find the package.json as this will be our root17  var promise = findPackage(path.dirname(module.parent.filename))18    .then(function (dir) {19      // now try to load the package20      var v = require(path.resolve(dir, 'package.json')).version;21 22      if (v && v !== '0.0.0-development') {23        return v;24      }25 26      root = dir;27 28      // else we're in development, give the commit out29      // get the last commit and whether the working dir is dirty30      var promises = [31        branch().catch(function () { return 'master'; }),32        commit().catch(function () { return '<none>'; }),33        dirty().catch(function () { return 0; }),34      ];35 36      // use the cached result as the export37      return Promise.all(promises).then(function (res) {38        var branch = res[0];39        var commit = res[1];40        var dirtyCount = parseInt(res[2], 10);41        var curr = branch + ': ' + commit;42        if (dirtyCount !== 0) {43          curr += ' (' + dirtyCount + ' dirty files)';44        }45 46        return curr;47      });48    }).catch(function (error) {49      console.log(error.stack);50      throw error;51    });52 53  if (callback) {54    promise.then(function (res) {55      callback(null, res);56    }, callback);57  }58 59  return promise;60}61 62function findPackage(dir) {63  if (dir === '/') {64    return Promise.reject(new Error('package not found'));65  }66  return new Promise(function (resolve) {67    fs.stat(path.resolve(dir, 'package.json'), function (error, exists) {68      if (error || !exists) {69        return resolve(findPackage(path.resolve(dir, '..')));70      }71 72      resolve(dir);73    });74  });75}76 77function command(cmd) {78  return new Promise(function (resolve, reject) {79    exec(cmd, { cwd: root }, function (err, stdout, stderr) {80      var error = stderr.trim();81      if (error) {82        return reject(new Error(error));83      }84      resolve(stdout.split('\n').join(''));85    });86  });87}88 89function commit() {90  return command('git rev-parse HEAD');91}92 93function branch() {94  return command('git rev-parse --abbrev-ref HEAD');95}96 97function dirty() {98  return command('expr $(git status --porcelain 2>/dev/null| ' +99    'egrep "^(M| M)" | wc -l)');100}101