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Based on if file contents would change\n * when being replaced, allows the caller to specify whether the file\n * should be replaced or not.\n * If null, files will be overwritten.\n * Function(path, 'identical' | 'changed' | 'new') => 'keep' | 'overwrite'\n */\nfunction copyAndReplace(\n srcPath: string,\n destPath: string,\n replacements: Record<string, string>,\n contentChangedCallback:\n | ((\n path: string,\n option: ContentChangedCallbackOption,\n ) => 'keep' | 'overwrite')\n | null,\n) {\n if (fs.lstatSync(srcPath).isDirectory()) {\n if (!fs.existsSync(destPath)) {\n fs.mkdirSync(destPath);\n }\n // Not recursive\n return;\n }\n\n const extension = path.extname(srcPath);\n if (binaryExtensions.indexOf(extension) !== -1) {\n // Binary file\n let shouldOverwrite = 'overwrite';\n if (contentChangedCallback) {\n const newContentBuffer = fs.readFileSync(srcPath);\n let contentChanged: ContentChangedCallbackOption = 'identical';\n try {\n const origContentBuffer = fs.readFileSync(destPath);\n if (Buffer.compare(origContentBuffer, newContentBuffer) !== 0) {\n contentChanged = 'changed';\n }\n } catch (err) {\n if (err.code === 'ENOENT') {\n contentChanged = 'new';\n } else {\n throw err;\n }\n }\n shouldOverwrite = contentChangedCallback(destPath, contentChanged);\n }\n if (shouldOverwrite === 'overwrite') {\n copyBinaryFile(srcPath, destPath, (err) => {\n if (err) {\n throw err;\n }\n });\n }\n } else {\n // Text file\n const srcPermissions = fs.statSync(srcPath).mode;\n let content = fs.readFileSync(srcPath, 'utf8');\n Object.keys(replacements).forEach((regex) => {\n content = content.replace(new RegExp(regex, 'g'), replacements[regex]);\n });\n\n let shouldOverwrite = 'overwrite';\n if (contentChangedCallback) {\n // Check if contents changed and ask to overwrite\n let contentChanged: ContentChangedCallbackOption = 'identical';\n try {\n const origContent = fs.readFileSync(destPath, 'utf8');\n if (content !== origContent) {\n // logger.info('Content changed: ' + destPath);\n contentChanged = 'changed';\n }\n } catch (err) {\n if (err.code === 'ENOENT') {\n contentChanged = 'new';\n } else {\n throw err;\n }\n }\n shouldOverwrite = contentChangedCallback(destPath, contentChanged);\n }\n if (shouldOverwrite === 'overwrite') {\n fs.writeFileSync(destPath, content, {\n encoding: 'utf8',\n mode: srcPermissions,\n });\n }\n }\n}\n\n/**\n * Same as 'cp' on Unix. Don't do any replacements.\n */\nfunction copyBinaryFile(\n srcPath: string,\n destPath: string,\n cb: (err?: Error) => void,\n) {\n let cbCalled = false;\n const srcPermissions = fs.statSync(srcPath).mode;\n const readStream = fs.createReadStream(srcPath);\n readStream.on('error', (err) => {\n done(err);\n });\n const writeStream = fs.createWriteStream(destPath, {\n mode: srcPermissions,\n });\n writeStream.on('error', (err) => {\n done(err);\n });\n writeStream.on('close', () => {\n done();\n });\n readStream.pipe(writeStream);\n function done(err?: Error) {\n if (!cbCalled) {\n cb(err);\n cbCalled = true;\n }\n }\n}\n\nexport default copyAndReplace;\n"]} |