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When deploying library PLG files, convert them to utf16le with BOM #6

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When deploying library PLG files, convert them to utf16le with BOM #6

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52 changes: 42 additions & 10 deletions deployPlg.js
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Original file line number Diff line number Diff line change
@@ -1,6 +1,31 @@
#!/usr/bin/env node
'use strict';

var BOM = '\ufeff';

/**
* Distinguishes between utf8 and utf16le. Returns the encoding and the BOM, if
* the latter is missing in the buffer and needs to be added.
*/
function guessEncoding(buffer) {
// Check for BOM
if (buffer[0] === 0xFF && buffer[1] === 0xFE) {
return ['utf16le', ''];
}
if (buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
return ['utf8', ''];
}

// Check for null bytes that are typcial for utf16, assuming that PLG code
// will not contain null bytes in utf8 encoding.
if (buffer[1] === 0x00) {
return ['utf16le', BOM];
}

return ['utf8', BOM];
}


function main(pluginFileNames) {
var fs = require('fs-extra');
var path = require('path');
Expand Down Expand Up @@ -29,18 +54,25 @@ function main(pluginFileNames) {
console.log('(%s not found)', fileToCopy);
}
});

if (config.linkLibraries) {
config.linkLibraries.forEach(function(filename) {
console.log('copying linked library %s', filename);
var fileToCopy = path.join(config.libDir, filename);
if (fs.existsSync(fileToCopy)) {
fs.copySync(fileToCopy, path.join(destDirectory, filename));
} else {
console.log('library %s could not be copied', fileToCopy);
}
});
}
console.log('copying linked library %s', filename);
var fileToCopy = path.join(config.libDir, filename);
if (fs.existsSync(fileToCopy)) {
var destination = path.join(destDirectory, filename);
if (fileToCopy.match(/\.plg$/)) {
var buffer = fs.readFileSync(fileToCopy);
var [encoding, bom] = guessEncoding(buffer);
fs.writeFileSync(destination, bom + buffer.toString(encoding), 'utf16le');
} else {
fs.copySync(fileToCopy, destination);
}
} else {
console.log('library %s could not be copied', fileToCopy);
}
});
}

console.log('done');
}
Expand Down