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index.js
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index.js
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"use strict";
var $babel = require("babel-core");
var $utils = require("rollup-pluginutils");
var $path = require("path");
var $fs = require("fs");
var $convert = require("./src/convert");
var $uncurry = require("./src/uncurry");
var $inline = require("./src/inline");
var $rename = require("./src/rename");
var $propagate = require("./src/propagate");
var $removeSequence = require("./src/remove-sequence");
var $removeIIFE = require("./src/remove-iife");
var $typeclass = require("./src/typeclass");
var $deadCode = require("./src/dead-code");
function pursPath(options, path) {
// TODO should this use resolve ?
return $path.resolve($path.join(options.buildDir, path, "index.js"));
}
var entryPath = "\0rollup-plugin-purs:entry-point";
module.exports = function (options) {
if (options == null) {
options = {};
}
if (options.outputDir != null) {
console.warn("rollup-plugin-purs: outputDir option is deprecated, use buildDir instead");
options.buildDir = options.outputDir;
}
if (options.buildDir == null) {
options.buildDir = "output";
}
if (options.runMain == null) {
options.runMain = true;
}
if (options.debug == null) {
options.debug = true;
}
if (options.optimizations == null) {
options.optimizations = {};
}
// TODO remove this in 2.0.0
if (options.uncurry != null) {
console.warn("rollup-plugin-purs: uncurry option is deprecated, use optimizations.uncurry instead");
options.optimizations.uncurry = options.uncurry;
}
// TODO remove this in 2.0.0
if (options.inline != null) {
console.warn("rollup-plugin-purs: inline option is deprecated, use optimizations.inline instead");
options.optimizations.inline = options.inline;
}
if (options.optimizations.uncurry == null) {
options.optimizations.uncurry = true;
}
if (options.optimizations.inline == null) {
options.optimizations.inline = true;
}
if (options.optimizations.removeDeadCode == null) {
options.optimizations.removeDeadCode = true;
}
if (options.optimizations.assumePureVars == null) {
options.optimizations.assumePureVars = true;
}
var filter = $utils.createFilter(options.include, options.exclude);
var entry = null;
return {
name: "purs",
// TODO hacky
options: function (rollup) {
// We use a better treeshaking algorithm than Rollup, so we disable Rollup's treeshaking for faster speed
// TODO set this to false later
rollup.treeshake = true;
if (options.runMain &&
rollup.entry != null &&
rollup.entry !== entryPath) {
entry = rollup.entry;
rollup.entry = entryPath;
}
if (options.runMain &&
rollup.input != null &&
rollup.input !== entryPath) {
entry = rollup.input;
rollup.input = entryPath;
}
},
resolveId: function (filePath, importer) {
// TODO is this correct ?
if (/\u0000/.test(filePath)) {
return filePath;
} else {
// TODO is this correct ?
var dir = (importer == null
? process.cwd()
: $path.dirname(importer));
// TODO is this path correct ?
// TODO apply the `filter` to the ID ?
var fullPath = $path.join(dir, filePath);
if ($path.extname(filePath) === ".purs") {
// TODO hacky
return new Promise(function (resolve, reject) {
$fs.readFile(fullPath, { encoding: "utf8" }, function (err, file) {
if (err) {
reject(err);
} else {
// TODO super hacky
var a = /(?:^|\n|\r\n) *module +([^ \n\r\(]+)/.exec(file);
if (a) {
resolve(pursPath(options, a[1]));
} else {
reject(new Error("Could not detect module name for file " + fullPath));
}
}
});
});
// TODO hacky
} else {
return new Promise(function (resolve, reject) {
$fs.stat(fullPath, function (err, stat) {
if (err) {
// TODO better error handling
resolve(null);
// TODO is this correct ?
// TODO only do this for the buildDir ?
} else if (stat.isDirectory()) {
resolve($path.join(fullPath, "index.js"));
} else {
resolve(fullPath);
}
});
});
}
}
},
// TODO hacky
// This creates a main entry point that calls the `main` function of the main PureScript module
load: function (filePath) {
if (filePath === entryPath) {
// TODO better stringification for the path ?
// TODO source maps for this ?
return "import { main } from " + JSON.stringify(entry) + "; main();";
}
},
transform: function (code, filePath) {
// TODO better filtering ?
if (!filter(filePath)) return;
// TODO test if this optimization actually makes it faster or not
if (!/exports|module|require/.test(code)) return;
return $convert.call(this, code, filePath);
},
transformBundle: function (code) {
/*return $babel.transform("foo", {
babelrc: false,
ast: false,
filename: "\0rollup-plugin-purs:bundle",
sourceMaps: true,
plugins: [
function (babel) {
return {
visitor: {
Identifier: {
enter: function (path) {
if (path.node.name === "foo") {
path.replaceWith({
type: "FunctionExpression",
id: null,
params: [{
type: "Identifier",
name: "bar"
}],
body: {
type: "BlockStatement",
body: [{
type: "ExpressionStatement",
expression: {
type: "Identifier",
name: "bar"
}
}]
}
});
}
}
}
}
};
},
function (babel) {
return {
visitor: {
Identifier: {
enter: function (path) {
console.log(path.node.name, path.scope.getBinding(path.node.name) != null);
}
}
}
};
}
]
});*/
// TODO what about sourceRoot ?
var info = $babel.transform(code, {
babelrc: false,
code: false,
ast: true,
sourceMaps: false,
// TODO is this correct ?
filename: "\0rollup-plugin-purs:bundle",
plugins: [
$rename,
// TODO better way of handling this ?
$propagate
]
});
var plugins = [];
// TODO better way of handling this ?
plugins.push($propagate);
if (options.optimizations.inline) {
plugins.push([$inline, { debug: options.debug }]);
plugins.push([$typeclass, { debug: options.debug }]);
}
if (options.optimizations.uncurry) {
plugins.push([$uncurry, { debug: options.debug }]);
}
plugins.push([$removeIIFE, { debug: options.debug }]);
plugins.push($removeSequence);
// TODO is this the correct place for this ?
plugins.push("transform-do-expressions");
// TODO do we need transform-es2015-block-scoped-functions ?
// TODO is this the correct place for this ?
plugins.push("transform-es2015-block-scoping");
// TODO use babel-preset-babili ?
// TODO use "minify-dead-code-elimination" ?
plugins.push("minify-constant-folding");
if (options.optimizations.removeDeadCode) {
// TODO is this the correct `code` to use ?
info = $babel.transformFromAst(info.ast, null, {
babelrc: false,
code: false,
ast: true,
sourceMaps: false,
plugins: plugins
});
plugins = [
[$deadCode, {
debug: options.debug,
assumePureVars: options.optimizations.assumePureVars
}]
];
}
// TODO is this the correct `code` to use ?
return $babel.transformFromAst(info.ast, null, {
babelrc: false,
code: true,
ast: false,
sourceMaps: true,
plugins: plugins
});
}
};
};