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index.js
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index.js
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//@flow
const _ = require("lodash"),
path = require("path"),
glob = require("glob"),
mkdirp = require("mkdirp"),
findExposedValues = require("./js/find-exposed-values").findExposedValues,
writeGeneratedElmPackage = require("./js/generate-elm-package"),
writeMain = require("./js/generate-main").writeMain,
writeFile = require("./js/generate-class-modules").writeFile,
findElmFiles = require("./js/find-elm-files"),
compileAll = require("./js/compile-all"),
fs = require("fs-extra"),
compile = require("node-elm-compiler").compile,
extractCssResults = require("./js/extract-css-results.js"),
hackMain = require("./js/hack-main.js");
const jsEmitterFilename = "emitter.js";
module.exports = function(
projectDir /*: string*/,
outputDir /*: string */,
pathToMake /*: ?string */
) {
const cssSourceDir = path.join(projectDir, "css");
const cssElmPackageJson = path.join(cssSourceDir, "elm.json");
if (!fs.existsSync(cssElmPackageJson)) {
mkdirp.sync(cssSourceDir);
// TODO do an init here
}
const elmFilePaths = findElmFiles(cssSourceDir);
const generatedDir = path.join(
projectDir,
"elm-stuff",
"generated-code",
"ThinkAlexandria",
"css-in-elm"
);
// Symlink our existing elm-stuff into the generated code,
// to avoid re-downloading and recompiling things we already
// just downloaded and compiled.
var generatedElmStuff = path.join(generatedDir, "elm-stuff");
mkdirp.sync(generatedDir);
// ensure the elm-stuff directory in the css/ folder exists so we can symlink
// it. If it does not exist `elm` has probably not downloaded the required
// packages yet and will do so automatically.
var cssSourceDirElmStuff = path.join(cssSourceDir, "elm-stuff");
mkdirp.sync(cssSourceDirElmStuff);
if (!fs.existsSync(generatedElmStuff)) {
fs.symlinkSync(
path.join(cssSourceDir, "elm-stuff"),
generatedElmStuff,
"junction" // Only affects Windows, but necessary for this to work there. See https://github.com/gulpjs/vinyl-fs/issues/210
);
}
const generatedSrc = path.join(generatedDir, "src");
const mainFilename = path.join(generatedSrc, "Main.elm");
const makeGeneratedSrcDir = new Promise(function(resolve, reject) {
mkdirp(generatedSrc, function(error) {
if (error) reject(error);
resolve();
});
});
return Promise.all([
writeGeneratedElmPackage(generatedDir, generatedSrc, cssSourceDir),
makeGeneratedSrcDir,
compileAll(pathToMake, cssSourceDir, elmFilePaths)
]).then(function(promiseOutputs) {
const repository /*: string */ = promiseOutputs[0];
// This part below is not used because we are using the Stylesheets.elm input format
// instead of generating our own Main.elm file
//
// Not quite sure what findExposedValues is doing, the format of the elmi
// files has changed in 0.19, so it will never return results right now
// anyway
return findExposedValues(
["Css.File.UniqueClass", "Css.Snippet"],
generatedDir,
elmFilePaths,
[cssSourceDir],
true
)
.then(function(modules) {
return Promise.all(
[writeMain(mainFilename, modules)].concat(
modules.map(function(modul) {
return writeFile(path.join(generatedDir, "styles"), modul);
})
)
)
.then(function() {
return emit(
mainFilename,
repository,
path.join(generatedDir, jsEmitterFilename),
generatedDir,
pathToMake
).then(writeResults(outputDir));
});
});
});
};
function emit(
src /*: string */,
repository /*: string */,
dest /*: string */,
cwd /*: string */,
pathToMake /*: ?string */
) {
// Compile the js file.
return compileEmitter(src, {
output: dest,
cwd: cwd,
pathToMake: pathToMake
})
//.then(function() {
// return hackMain(repository, dest);
//})
.then(function() {
return extractCssResults(dest);
});
}
function writeResults(outputDir) {
return function(results) {
return Promise.all(results.map(writeResult(outputDir)));
};
}
function writeResult(outputDir) {
return function(result) {
return new Promise(function(resolve, reject) {
const filename = path.join(outputDir, result.filename);
// It's important to call path.dirname explicitly,
// because result.filename can have directories in it!
const directory = path.dirname(filename);
mkdirp(directory, function(dirError) {
if (dirError) return reject(dirError);
fs.writeFile(filename, result.content + "\n", function(
fileError,
file
) {
if (fileError) return reject(fileError);
resolve(result);
});
});
});
};
}
function reportFailures(failures) {
return (
"The following errors occurred during compilation:\n\n" +
failures
.map(function(result) {
return result.filename + ": " + result.content;
})
.join("\n\n")
);
}
function compileEmitter(src, options) {
return new Promise(function(resolve, reject) {
compile(src, options).on("close", function(exitCode) {
if (exitCode === 0) {
resolve();
} else {
reject("Errored with exit code " + exitCode);
}
});
});
}