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1 | 'use strict' | |
2 | ||
3 | const debug_ = require('debug'); | |
4 | ||
5 | const debug = debug_('purs-loader'); | |
6 | ||
7 | const debugVerbose = debug_('purs-loader:verbose'); | |
8 | ||
9 | const loaderUtils = require('loader-utils') | |
10 | ||
11 | const Promise = require('bluebird') | |
12 | ||
13 | const path = require('path') | |
14 | ||
15 | const PsModuleMap = require('./purs-module-map'); | |
16 | ||
17 | const compile = require('./compile'); | |
18 | ||
19 | const bundle = require('./bundle'); | |
20 | ||
21 | const ide = require('./ide'); | |
22 | ||
23 | const toJavaScript = require('./to-javascript'); | |
24 | ||
25 | const sourceMaps = require('./source-maps'); | |
26 | ||
27 | const spawn = require('cross-spawn').sync | |
28 | ||
29 | const eol = require('os').EOL | |
30 | ||
31 | var CACHE_VAR = { | |
32 | rebuild: false, | |
33 | deferred: [], | |
34 | bundleModules: [], | |
35 | ideServer: null, | |
36 | psModuleMap: null, | |
37 | warnings: [], | |
38 | errors: [], | |
39 | compilationStarted: false, | |
40 | compilationFinished: false, | |
41 | installed: false, | |
42 | srcOption: [], | |
43 | spagoOutputPath: null | |
44 | }; | |
45 | ||
46 | // include src files provided by psc-package or Spago | |
47 | function requestDependencySources(packagerCommand, srcPath, loaderOptions) { | |
48 | const packagerArgs = ['sources']; | |
49 | ||
50 | const loaderSrc = loaderOptions.src || [ | |
51 | srcPath | |
52 | ]; | |
53 | ||
54 | debug('%s %o', packagerCommand, packagerArgs); | |
55 | ||
56 | const cmd = spawn(packagerCommand, packagerArgs); | |
57 | ||
58 | if (cmd.error) { | |
59 | throw new Error(cmd.error); | |
60 | } | |
61 | else if (cmd.status !== 0) { | |
62 | const error = cmd.stdout.toString(); | |
63 | ||
64 | throw new Error(error); | |
65 | } | |
66 | else { | |
67 | const result = cmd.stdout.toString().split(eol).filter(v => v != '').concat(loaderSrc); | |
68 | ||
69 | debug('%s result: %o', packagerCommand, result); | |
70 | ||
71 | CACHE_VAR.srcOption = result; | |
72 | ||
73 | return result; | |
74 | } | |
75 | } | |
76 | ||
77 | // 'spago output path' will return the output folder in a monorepo | |
78 | function getSpagoSources() { | |
79 | const cachedVal = CACHE_VAR.spagoOutputPath; | |
80 | if (cachedVal) { | |
81 | return cachedVal | |
82 | } | |
83 | const command = "spago" | |
84 | const args = ["path", "output"] | |
85 | ||
86 | const cmd = spawn(command, args); | |
87 | ||
88 | if (cmd.error) { | |
89 | throw new Error(cmd.error); | |
90 | } | |
91 | else if (cmd.status !== 0) { | |
92 | const error = cmd.stdout.toString(); | |
93 | ||
94 | throw new Error(error); | |
95 | } | |
96 | else { | |
97 | const result = cmd.stdout.toString().split(eol)[0] | |
98 | ||
99 | debug('"spago path output" result: %o', result); | |
100 | ||
101 | CACHE_VAR.spagoOutputPath = result; | |
102 | ||
103 | return result; | |
104 | } | |
105 | } | |
106 | ||
107 | module.exports = function purescriptLoader(source, map) { | |
108 | this.cacheable && this.cacheable(); | |
109 | ||
110 | const webpackContext = (this.options && this.options.context) || this.rootContext; | |
111 | ||
112 | const callback = this.async(); | |
113 | ||
114 | const loaderOptions = loaderUtils.getOptions(this) || {}; | |
115 | ||
116 | const srcOption = ((pscPackage, spago) => { | |
117 | const srcPath = path.join('src', '**', '*.purs'); | |
118 | ||
119 | const bowerPath = path.join('bower_components', 'purescript-*', 'src', '**', '*.purs'); | |
120 | ||
121 | if (CACHE_VAR.srcOption.length > 0) { | |
122 | return CACHE_VAR.srcOption; | |
123 | } | |
124 | else if (pscPackage) { | |
125 | return requestDependencySources('psc-package', srcPath, loaderOptions) | |
126 | } | |
127 | else if (spago) { | |
128 | return requestDependencySources('spago', srcPath, loaderOptions) | |
129 | } | |
130 | else { | |
131 | const result = loaderOptions.src || [ | |
132 | bowerPath, | |
133 | srcPath | |
134 | ]; | |
135 | ||
136 | CACHE_VAR.srcOption = result; | |
137 | ||
138 | return result; | |
139 | } | |
140 | })(loaderOptions.pscPackage, loaderOptions.spago); | |
141 | ||
142 | const outputPath = loaderOptions.spago ? getSpagoSources() : 'output' | |
143 | ||
144 | const options = Object.assign({ | |
145 | context: webpackContext, | |
146 | psc: null, | |
147 | pscArgs: {}, | |
148 | pscBundle: null, | |
149 | pscBundleArgs: {}, | |
150 | pscIdeClient: null, | |
151 | pscIdeClientArgs: {}, | |
152 | pscIdeServer: null, | |
153 | pscIdeServerArgs: {}, | |
154 | pscIdeRebuildArgs: {}, | |
155 | pscIde: false, | |
156 | pscIdeColors: loaderOptions.psc === 'psa', | |
157 | pscPackage: false, | |
158 | spago: false, | |
159 | bundleOutput: 'output/bundle.js', | |
160 | bundleNamespace: 'PS', | |
161 | bundle: false, | |
162 | warnings: true, | |
163 | watch: false, | |
164 | output: outputPath, | |
165 | src: [] | |
166 | }, loaderOptions, { | |
167 | src: srcOption | |
168 | }); | |
169 | ||
170 | if (!CACHE_VAR.installed) { | |
171 | debugVerbose('installing purs-loader with options: %O', options); | |
172 | ||
173 | CACHE_VAR.installed = true; | |
174 | ||
175 | const invalidCb = () => { | |
176 | debugVerbose('invalidating loader CACHE_VAR'); | |
177 | ||
178 | CACHE_VAR = { | |
179 | rebuild: options.pscIde, | |
180 | deferred: [], | |
181 | bundleModules: [], | |
182 | ideServer: CACHE_VAR.ideServer, | |
183 | psModuleMap: CACHE_VAR.psModuleMap, | |
184 | warnings: [], | |
185 | errors: [], | |
186 | compilationStarted: false, | |
187 | compilationFinished: false, | |
188 | installed: CACHE_VAR.installed, | |
189 | srcOption: [] | |
190 | }; | |
191 | } | |
192 | ||
193 | // invalidate loader CACHE_VAR when bundle is marked as invalid (in watch mode) | |
194 | if(this._compiler.hooks){ | |
195 | this._compiler.hooks.invalid.tap('purs-loader', invalidCb); | |
196 | } else { | |
197 | this._compiler.plugin('invalid', invalidCb); | |
198 | } | |
199 | ||
200 | const afterCompileCb = (compilation, callback) => { | |
201 | CACHE_VAR.warnings.forEach(warning => { | |
202 | compilation.warnings.push(warning); | |
203 | }); | |
204 | ||
205 | CACHE_VAR.errors.forEach(error => { | |
206 | compilation.errors.push(error); | |
207 | }); | |
208 | ||
209 | callback() | |
210 | } | |
211 | ||
212 | // add psc warnings to webpack compilation warnings | |
213 | if(this._compiler.hooks) { | |
214 | this._compiler.hooks.afterCompile.tapAsync('purs-loader', afterCompileCb); | |
215 | } else { | |
216 | this._compiler.plugin('after-compile', afterCompileCb); | |
217 | } | |
218 | } | |
219 | ||
220 | const psModuleName = PsModuleMap.matchModule(source); | |
221 | ||
222 | const psModule = { | |
223 | name: psModuleName, | |
224 | source: source, | |
225 | load: ({js, map}) => callback(null, js, map), | |
226 | reject: error => callback(error), | |
227 | srcPath: this.resourcePath, | |
228 | remainingRequest: loaderUtils.getRemainingRequest(this), | |
229 | srcDir: path.dirname(this.resourcePath), | |
230 | jsPath: path.resolve(path.join(options.output, psModuleName, 'index.js')), | |
231 | options: options, | |
232 | cache: CACHE_VAR, | |
233 | emitWarning: warning => { | |
234 | if (options.warnings && warning.length) { | |
235 | CACHE_VAR.warnings.push(warning); | |
236 | } | |
237 | }, | |
238 | emitError: error => { | |
239 | if (error.length) { | |
240 | CACHE_VAR.errors.push(error); | |
241 | } | |
242 | } | |
243 | } | |
244 | ||
245 | debug('loading %s', psModule.name); | |
246 | ||
247 | if (options.bundle) { | |
248 | CACHE_VAR.bundleModules.push(psModule.name); | |
249 | } | |
250 | ||
251 | if (CACHE_VAR.rebuild) { | |
252 | const connect = () => { | |
253 | if (!CACHE_VAR.ideServer) { | |
254 | CACHE_VAR.ideServer = true; | |
255 | ||
256 | return ide.connect(psModule) | |
257 | .then(ideServer => { | |
258 | CACHE_VAR.ideServer = ideServer; | |
259 | return psModule; | |
260 | }) | |
261 | .then(ide.loadWithRetry) | |
262 | .catch(error => { | |
263 | if (CACHE_VAR.ideServer.kill) { | |
264 | debug('ide failed to initially load modules, stopping the ide server process'); | |
265 | ||
266 | CACHE_VAR.ideServer.kill(); | |
267 | } | |
268 | ||
269 | CACHE_VAR.ideServer = null; | |
270 | ||
271 | return Promise.reject(error); | |
272 | }) | |
273 | ; | |
274 | } | |
275 | else { | |
276 | return Promise.resolve(psModule); | |
277 | } | |
278 | }; | |
279 | ||
280 | const rebuild = () => | |
281 | ide.rebuild(psModule) | |
282 | .then(() => | |
283 | toJavaScript(psModule) | |
284 | .then(js => sourceMaps(psModule, js)) | |
285 | .then(psModule.load) | |
286 | .catch(psModule.reject) | |
287 | ) | |
288 | .catch(error => { | |
289 | if (error instanceof ide.UnknownModuleError) { | |
290 | // Store the modules that trigger a recompile due to an | |
291 | // unknown module error. We need to wait until compilation is | |
292 | // done before loading these files. | |
293 | ||
294 | CACHE_VAR.deferred.push(psModule); | |
295 | ||
296 | if (!CACHE_VAR.compilationStarted) { | |
297 | CACHE_VAR.compilationStarted = true; | |
298 | ||
299 | return compile(psModule) | |
300 | .then(() => { | |
301 | CACHE_VAR.compilationFinished = true; | |
302 | }) | |
303 | .then(() => | |
304 | Promise.map(CACHE_VAR.deferred, psModule => | |
305 | ide.load(psModule) | |
306 | .then(() => toJavaScript(psModule)) | |
307 | .then(js => sourceMaps(psModule, js)) | |
308 | .then(psModule.load) | |
309 | ) | |
310 | ) | |
311 | .catch(error => { | |
312 | CACHE_VAR.deferred[0].reject(error); | |
313 | ||
314 | CACHE_VAR.deferred.slice(1).forEach(psModule => { | |
315 | psModule.reject(new Error('purs-loader failed')); | |
316 | }) | |
317 | }) | |
318 | ; | |
319 | } | |
320 | else { | |
321 | // The compilation has started. We must wait until it is | |
322 | // done in order to ensure the module map contains all of | |
323 | // the unknown modules. | |
324 | } | |
325 | } | |
326 | else { | |
327 | debug('ide rebuild failed due to an unhandled error: %o', error); | |
328 | ||
329 | psModule.reject(error); | |
330 | } | |
331 | }) | |
332 | ; | |
333 | ||
334 | connect().then(rebuild); | |
335 | } | |
336 | else if (CACHE_VAR.compilationFinished) { | |
337 | debugVerbose('compilation is already finished, loading module %s', psModule.name); | |
338 | ||
339 | toJavaScript(psModule) | |
340 | .then(js => sourceMaps(psModule, js)) | |
341 | .then(psModule.load) | |
342 | .catch(psModule.reject); | |
343 | } | |
344 | else { | |
345 | // The compilation has not finished yet. We need to wait for | |
346 | // compilation to finish before the loaders run so that references | |
347 | // to compiled output are valid. Push the modules into the CACHE_VAR to | |
348 | // be loaded once the complation is complete. | |
349 | ||
350 | CACHE_VAR.deferred.push(psModule); | |
351 | ||
352 | if (!CACHE_VAR.compilationStarted) { | |
353 | CACHE_VAR.compilationStarted = true; | |
354 | ||
355 | compile(psModule) | |
356 | .then(() => { | |
357 | CACHE_VAR.compilationFinished = true; | |
358 | }) | |
359 | .then(() => { | |
360 | if (options.bundle) { | |
361 | return bundle(options, CACHE_VAR.bundleModules); | |
362 | } | |
363 | }) | |
364 | .then(() => | |
365 | Promise.map(CACHE_VAR.deferred, psModule => | |
366 | toJavaScript(psModule) | |
367 | .then(js => sourceMaps(psModule, js)) | |
368 | .then(psModule.load) | |
369 | ) | |
370 | ) | |
371 | .catch(error => { | |
372 | CACHE_VAR.deferred[0].reject(error); | |
373 | ||
374 | CACHE_VAR.deferred.slice(1).forEach(psModule => { | |
375 | psModule.reject(new Error('purs-loader failed')); | |
376 | }) | |
377 | }) | |
378 | ; | |
379 | } | |
380 | else { | |
381 | // The complation has started. Nothing to do but wait until it is | |
382 | // done before loading all of the modules. | |
383 | } | |
384 | } | |
385 | } |