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Make the hmaptool support response file #2601

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Nov 18, 2024
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Make the hmaptool support response file #2601

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17 changes: 17 additions & 0 deletions tools/hmaptool/BinaryHeaderMapTool.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -25,6 +25,23 @@ struct BinaryHeaderMapTool {
var arguments = arguments
var output: URL?

// If the first argument starts with @, treat it as a response file.
// Since this is an internal tool, it's safe to just check the first argument.
if let arg = arguments.first, arg.hasPrefix("@") {
// Remove @ prefix to get file path
let filePath = String(arg.dropFirst())

guard FileManager.default.fileExists(atPath: filePath) else {
fatalError("The response file doesn't exist: \(filePath)")
}

guard let fileContents = try? String(contentsOfFile: filePath, encoding: .utf8) else {
fatalError("The response file cannot be read: \(filePath)")
}

arguments = fileContents.components(separatedBy: .newlines)
}

if let outputIndex = arguments.firstIndex(of: "--output") {
guard outputIndex + 1 < arguments.count else {
fatalError("Missing output path after --output")
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