packager worker: enable possibility to add Flow annotations

Reviewed By: matryoshcow

Differential Revision: D4160456

fbshipit-source-id: bbc2420126d8e8b725c0b7b359b35f09dfe8c8d6
This commit is contained in:
Jean Lauliac 2016-11-11 05:22:30 -08:00 committed by Facebook Github Bot
parent b6b9d37225
commit bc9bbb5533
3 changed files with 148 additions and 101 deletions

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@ -6,99 +6,11 @@
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
'use strict';
const constantFolding = require('./constant-folding');
const extractDependencies = require('./extract-dependencies');
const inline = require('./inline');
const minify = require('./minify');
function makeTransformParams(filename, sourceCode, options) {
if (filename.endsWith('.json')) {
sourceCode = 'module.exports=' + sourceCode;
}
return {filename, sourceCode, options};
}
function transformCode(transform, filename, sourceCode, options, callback) {
const params = makeTransformParams(filename, sourceCode, options.transform);
const isJson = filename.endsWith('.json');
const transformFileStartLogEntry = {
action_name: 'Transforming file',
action_phase: 'start',
file_name: filename,
log_entry_label: 'Transforming file',
start_timestamp: process.hrtime(),
};
transform(params, (error, transformed) => {
if (error) {
callback(error);
return;
}
var code, map;
if (options.minify) {
const optimized =
constantFolding(filename, inline(filename, transformed, options));
code = optimized.code;
map = optimized.map;
} else {
code = transformed.code;
map = transformed.map;
}
if (isJson) {
code = code.replace(/^\w+\.exports=/, '');
} else {
// Remove shebang
code = code.replace(/^#!.*/, '');
}
const result = isJson || options.extern
? {dependencies: [], dependencyOffsets: []}
: extractDependencies(code);
const timeDelta = process.hrtime(transformFileStartLogEntry.start_timestamp);
const duration_ms = Math.round((timeDelta[0] * 1e9 + timeDelta[1]) / 1e6);
const transformFileEndLogEntry = {
action_name: 'Transforming file',
action_phase: 'end',
file_name: filename,
duration_ms: duration_ms,
log_entry_label: 'Transforming file',
};
result.code = code;
result.map = map;
return callback(null, {
result,
transformFileStartLogEntry,
transformFileEndLogEntry,
});
});
}
exports.transformAndExtractDependencies = (
transform,
filename,
sourceCode,
options,
callback
) => {
transformCode(require(transform), filename, sourceCode, options || {}, callback);
};
exports.minify = (filename, code, sourceMap, callback) => {
var result;
try {
result = minify(filename, code, sourceMap);
} catch (error) {
callback(error);
}
callback(null, result);
};
exports.transformCode = transformCode; // for easier testing
const path = require('path');
require('../../../../babelRegisterOnly')([
path.resolve(path.join(__dirname, '../../**/*')),
]);
module.exports = require('./worker');

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@ -0,0 +1,141 @@
/**
* Copyright (c) 2016-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @flow
*/
'use strict';
const constantFolding = require('./constant-folding');
const extractDependencies = require('./extract-dependencies');
const inline = require('./inline');
const minify = require('./minify');
function makeTransformParams(filename, sourceCode, options) {
if (filename.endsWith('.json')) {
sourceCode = 'module.exports=' + sourceCode;
}
return {filename, sourceCode, options};
}
export type TransformedCode = {
code: string,
dependencies: Array<string>,
dependencyOffsets: Array<number>,
map?: ?{},
};
type Transform = (params: {
filename: string,
sourceCode: string,
options: ?{},
}) => mixed;
type Options = {transform?: {}};
type Callback = (
error: ?Error,
data: ?{
result: TransformedCode,
transformFileStartLogEntry: {},
transformFileEndLogEntry: {},
},
) => mixed;
function transformCode(
transform: Transform,
filename: string,
sourceCode: string,
options: Options,
callback: Callback,
) {
const params = makeTransformParams(filename, sourceCode, options.transform);
const isJson = filename.endsWith('.json');
const transformFileStartLogEntry = {
action_name: 'Transforming file',
action_phase: 'start',
file_name: filename,
log_entry_label: 'Transforming file',
start_timestamp: process.hrtime(),
};
transform(params, (error, transformed) => {
if (error) {
callback(error);
return;
}
var code, map;
if (options.minify) {
const optimized =
constantFolding(filename, inline(filename, transformed, options));
code = optimized.code;
map = optimized.map;
} else {
code = transformed.code;
map = transformed.map;
}
if (isJson) {
code = code.replace(/^\w+\.exports=/, '');
} else {
// Remove shebang
code = code.replace(/^#!.*/, '');
}
const depsResult = isJson || options.extern
? {dependencies: [], dependencyOffsets: []}
: extractDependencies(code);
const timeDelta = process.hrtime(transformFileStartLogEntry.start_timestamp);
const duration_ms = Math.round((timeDelta[0] * 1e9 + timeDelta[1]) / 1e6);
const transformFileEndLogEntry = {
action_name: 'Transforming file',
action_phase: 'end',
file_name: filename,
duration_ms: duration_ms,
log_entry_label: 'Transforming file',
};
return callback(null, {
result: {...depsResult, code, map},
transformFileStartLogEntry,
transformFileEndLogEntry,
});
});
}
exports.transformAndExtractDependencies = (
transform: string,
filename: string,
sourceCode: string,
options: ?Options,
callback: Callback,
) => {
/* $FlowFixMe: impossible to type a dynamic require */
const transformModule = require(transform);
transformCode(transformModule, filename, sourceCode, options || {}, callback);
};
exports.minify = (
filename: string,
code: string,
sourceMap: string,
callback: (error: ?Error, result: mixed) => mixed,
) => {
var result;
try {
result = minify(filename, code, sourceMap);
} catch (error) {
callback(error);
}
callback(null, result);
};
exports.transformCode = transformCode; // for easier testing

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@ -21,17 +21,11 @@ const jsonStableStringify = require('json-stable-stringify');
const {join: joinPath, relative: relativePath, extname} = require('path');
import type {TransformedCode} from '../JSTransformer/worker/worker';
import type Cache from './Cache';
import type ModuleCache from './ModuleCache';
import type FastFs from './fastfs';
type TransformedCode = {
code: string,
dependencies: Array<string>,
dependencyOffsets: Array<number>,
map?: ?{},
};
type ReadResult = {
code?: string,
dependencies?: ?Array<string>,