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| 1 | +'use strict'; |
| 2 | + |
| 3 | +/* Drop this dependency once node.js 12 is required. */ |
| 4 | +const fromEntries = require('fromentries'); |
| 5 | + |
| 6 | +const state = getState(1); |
| 7 | + |
| 8 | +function getState(version) { |
| 9 | + const stateId = Symbol.for('process-on-spawn@*:singletonId'); |
| 10 | + |
| 11 | + /* istanbul ignore next: cannot cover this once nyc depends on this module */ |
| 12 | + if (stateId in global === false) { |
| 13 | + /* Hopefully version and unwrap forward compatibility is never actually needed */ |
| 14 | + Object.defineProperty(global, stateId, { |
| 15 | + writable: true, |
| 16 | + value: { |
| 17 | + version, |
| 18 | + listeners: [], |
| 19 | + unwrap: wrapSpawnFunctions() |
| 20 | + } |
| 21 | + }); |
| 22 | + } |
| 23 | + |
| 24 | + return global[stateId]; |
| 25 | +} |
| 26 | + |
| 27 | +function wrappedSpawnFunction(fn) { |
| 28 | + return function (options) { |
| 29 | + let env = fromEntries( |
| 30 | + options.envPairs.map(nvp => nvp.split(/^([^=]*)=/).slice(1)) |
| 31 | + ); |
| 32 | + |
| 33 | + const opts = Object.create(null, { |
| 34 | + env: { |
| 35 | + enumerable: true, |
| 36 | + get() { |
| 37 | + return env; |
| 38 | + }, |
| 39 | + set(value) { |
| 40 | + if (!value || typeof value !== 'object') { |
| 41 | + throw new TypeError('env must be an object'); |
| 42 | + } |
| 43 | + |
| 44 | + env = value; |
| 45 | + } |
| 46 | + }, |
| 47 | + cwd: { |
| 48 | + enumerable: true, |
| 49 | + get() { |
| 50 | + return options.cwd || process.cwd(); |
| 51 | + } |
| 52 | + } |
| 53 | + }); |
| 54 | + |
| 55 | + const args = [...options.args]; |
| 56 | + Object.freeze(args); |
| 57 | + Object.assign(opts, { |
| 58 | + execPath: options.file, |
| 59 | + args, |
| 60 | + detached: Boolean(options.detached), |
| 61 | + uid: options.uid, |
| 62 | + gid: options.gid, |
| 63 | + windowsVerbatimArguments: Boolean(options.windowsVerbatimArguments), |
| 64 | + windowsHide: Boolean(options.windowsHide) |
| 65 | + }); |
| 66 | + Object.freeze(opts); |
| 67 | + |
| 68 | + state.listeners.forEach(listener => { |
| 69 | + listener(opts); |
| 70 | + }); |
| 71 | + |
| 72 | + options.envPairs = Object.entries(opts.env).map(([name, value]) => `${name}=${value}`); |
| 73 | + |
| 74 | + return fn.call(this, options); |
| 75 | + }; |
| 76 | +} |
| 77 | + |
| 78 | +function wrapSpawnFunctions() { |
| 79 | + const {ChildProcess} = require('child_process'); |
| 80 | + |
| 81 | + /* eslint-disable-next-line node/no-deprecated-api */ |
| 82 | + const spawnSyncBinding = process.binding('spawn_sync'); |
| 83 | + const originalSync = spawnSyncBinding.spawn; |
| 84 | + const originalAsync = ChildProcess.prototype.spawn; |
| 85 | + |
| 86 | + spawnSyncBinding.spawn = wrappedSpawnFunction(spawnSyncBinding.spawn); |
| 87 | + ChildProcess.prototype.spawn = wrappedSpawnFunction(ChildProcess.prototype.spawn); |
| 88 | + |
| 89 | + /* istanbul ignore next: forward compatibility code */ |
| 90 | + return () => { |
| 91 | + spawnSyncBinding.spawn = originalSync; |
| 92 | + ChildProcess.prototype.spawn = originalAsync; |
| 93 | + }; |
| 94 | +} |
| 95 | + |
| 96 | +module.exports = { |
| 97 | + addListener(listener) { |
| 98 | + state.listeners.push(listener); |
| 99 | + }, |
| 100 | + prependListener(listener) { |
| 101 | + state.listeners.unshift(listener); |
| 102 | + }, |
| 103 | + removeListener(listener) { |
| 104 | + const idx = state.listeners.indexOf(listener); |
| 105 | + if (idx !== -1) { |
| 106 | + state.listeners.splice(idx, 1); |
| 107 | + } |
| 108 | + }, |
| 109 | + removeAllListeners() { |
| 110 | + state.listeners = []; |
| 111 | + } |
| 112 | +}; |
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