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/* eslint-disable no-console */
import Async from 'neo-async';
import fs from 'fs';
import * as Handlebars from './handlebars';
import { basename } from 'path';
import { SourceMapConsumer, SourceNode } from 'source-map';
module.exports.loadTemplates = function(opts, callback) {
loadStrings(opts, function(err, strings) {
if (err) {
callback(err);
} else {
loadFiles(opts, function(err, files) {
if (err) {
callback(err);
} else {
opts.templates = strings.concat(files);
callback(undefined, opts);
}
});
}
});
};
function loadStrings(opts, callback) {
let strings = arrayCast(opts.string),
names = arrayCast(opts.name);
if (names.length !== strings.length && strings.length > 1) {
return callback(
new Handlebars.Exception(
'Number of names did not match the number of string inputs'
)
);
}
Async.map(
strings,
function(string, callback) {
if (string !== '-') {
callback(undefined, string);
} else {
// Load from stdin
let buffer = '';
process.stdin.setEncoding('utf8');
process.stdin.on('data', function(chunk) {
buffer += chunk;
});
process.stdin.on('end', function() {
callback(undefined, buffer);
});
}
},
function(err, strings) {
strings = strings.map((string, index) => ({
name: names[index],
path: names[index],
source: string
}));
callback(err, strings);
}
);
}
function loadFiles(opts, callback) {
// Build file extension pattern
let extension = (opts.extension || 'handlebars').replace(
/[\\^$*+?.():=!|{}\-[\]]/g,
function(arg) {
return '\\' + arg;
}
);
extension = new RegExp('\\.' + extension + '$');
let ret = [],
queue = (opts.files || []).map(template => ({ template, root: opts.root }));
Async.whilst(
() => queue.length,
function(callback) {
let { template: path, root } = queue.shift();
fs.stat(path, function(err, stat) {
if (err) {
return callback(
new Handlebars.Exception(`Unable to open template file "${path}"`)
);
}
if (stat.isDirectory()) {
opts.hasDirectory = true;
fs.readdir(path, function(err, children) {
/* istanbul ignore next : Race condition that being too lazy to test */
if (err) {
return callback(err);
}
children.forEach(function(file) {
let childPath = path + '/' + file;
if (
extension.test(childPath) ||
fs.statSync(childPath).isDirectory()
) {
queue.push({ template: childPath, root: root || path });
}
});
callback();
});
} else {
fs.readFile(path, 'utf8', function(err, data) {
/* istanbul ignore next : Race condition that being too lazy to test */
if (err) {
return callback(err);
}
if (opts.bom && data.indexOf('\uFEFF') === 0) {
data = data.substring(1);
}
// Clean the template name
let name = path;
if (!root) {
name = basename(name);
} else if (name.indexOf(root) === 0) {
name = name.substring(root.length + 1);
}
name = name.replace(extension, '');
ret.push({
path: path,
name: name,
source: data
});
callback();
});
}
});
},
function(err) {
if (err) {
callback(err);
} else {
callback(undefined, ret);
}
}
);
}
module.exports.cli = function(opts) {
if (opts.version) {
console.log(Handlebars.VERSION);
return;
}
if (!opts.templates.length && !opts.hasDirectory) {
throw new Handlebars.Exception(
'Must define at least one template or directory.'
);
}
if (opts.simple && opts.min) {
throw new Handlebars.Exception('Unable to minimize simple output');
}
const multiple = opts.templates.length !== 1 || opts.hasDirectory;
if (opts.simple && multiple) {
throw new Handlebars.Exception(
'Unable to output multiple templates in simple mode'
);
}
// Force simple mode if we have only one template and it's unnamed.
if (
!opts.amd &&
!opts.commonjs &&
opts.templates.length === 1 &&
!opts.templates[0].name
) {
opts.simple = true;
}
// Convert the known list into a hash
let known = {};
if (opts.known && !Array.isArray(opts.known)) {
opts.known = [opts.known];
}
if (opts.known) {
for (let i = 0, len = opts.known.length; i < len; i++) {
known[opts.known[i]] = true;
}
}
const objectName = opts.partial ? 'Handlebars.partials' : 'templates';
let output = new SourceNode();
if (!opts.simple) {
if (opts.amd) {
output.add(
"define(['" +
opts.handlebarPath +
'handlebars.runtime\'], function(Handlebars) {\n Handlebars = Handlebars["default"];'
);
} else if (opts.commonjs) {
output.add('var Handlebars = require("' + opts.commonjs + '");');
} else {
output.add('(function() {\n');
}
output.add(' var template = Handlebars.template, templates = ');
if (opts.namespace) {
output.add(opts.namespace);
output.add(' = ');
output.add(opts.namespace);
output.add(' || ');
}
output.add('{};\n');
}
opts.templates.forEach(function(template) {
let options = {
knownHelpers: known,
knownHelpersOnly: opts.o
};
if (opts.map) {
options.srcName = template.path;
}
if (opts.data) {
options.data = true;
}
let precompiled = Handlebars.precompile(template.source, options);
// If we are generating a source map, we have to reconstruct the SourceNode object
if (opts.map) {
let consumer = new SourceMapConsumer(precompiled.map);
precompiled = SourceNode.fromStringWithSourceMap(
precompiled.code,
consumer
);
}
if (opts.simple) {
output.add([precompiled, '\n']);
} else {
if (!template.name) {
throw new Handlebars.Exception('Name missing for template');
}
if (opts.amd && !multiple) {
output.add('return ');
}
output.add([
objectName,
"['",
template.name,
"'] = template(",
precompiled,
');\n'
]);
}
});
// Output the content
if (!opts.simple) {
if (opts.amd) {
if (multiple) {
output.add(['return ', objectName, ';\n']);
}
output.add('});');
} else if (!opts.commonjs) {
output.add('})();');
}
}
if (opts.map) {
output.add('\n//# sourceMappingURL=' + opts.map + '\n');
}
output = output.toStringWithSourceMap();
output.map = output.map + '';
if (opts.min) {
output = minify(output, opts.map);
}
if (opts.map) {
fs.writeFileSync(opts.map, output.map, 'utf8');
}
output = output.code;
if (opts.output) {
fs.writeFileSync(opts.output, output, 'utf8');
} else {
console.log(output);
}
};
function arrayCast(value) {
value = value != null ? value : [];
if (!Array.isArray(value)) {
value = [value];
}
return value;
}
/**
* Run uglify to minify the compiled template, if uglify exists in the dependencies.
*
* We are using `require` instead of `import` here, because es6-modules do not allow
* dynamic imports and uglify-js is an optional dependency. Since we are inside NodeJS here, this
* should not be a problem.
*
* @param {string} output the compiled template
* @param {string} sourceMapFile the file to write the source map to.
*/
function minify(output, sourceMapFile) {
try {
// Try to resolve uglify-js in order to see if it does exist
require.resolve('uglify-js');
} catch (e) {
if (e.code !== 'MODULE_NOT_FOUND') {
// Something else seems to be wrong
throw e;
}
// it does not exist!
console.error(
'Code minimization is disabled due to missing uglify-js dependency'
);
return output;
}
return require('uglify-js').minify(output.code, {
sourceMap: {
content: output.map,
url: sourceMapFile
}
});
}