write_percent_of_coverage.swift

import Foundation

guard let scheme = CommandLine.arguments
        .first(where: { $0.starts(with: "scheme_") })?
        .dropFirst(7) else {
    print("⁉️ empty schemes")
    print("exit(1)")
    exit(1)
}
let reportUrl = URL(string: "file://"+FileManager.default.currentDirectoryPath+"/tests/\(scheme)_report/coverage_result/report.json")!
let nf = NumberFormatter()
nf.maximumFractionDigits = 13
guard
    let data = try? Data(contentsOf: reportUrl),
    let jsonDict = try? JSONSerialization.jsonObject(with: data, options: []) as? [String: Any],
    let coverage = jsonDict["coverage"] as? Double,
    let stringCov = nf.string(from: NSNumber(value: coverage * 100))?
        .replacingOccurrences(of: ",", with: ".")
else {
    print("⛔️ failed parsing coverage percantage", reportUrl.path)
    print("exit(1)")
    exit(1)
}
print("(\(stringCov)%) covered")

let coverageFolder = FileManager.default.currentDirectoryPath+"/coverage/"
let coveragePercertFileUrl = URL(string: "file://\(coverageFolder).current")!
do {
    try FileManager.default.createDirectory(atPath: coverageFolder, withIntermediateDirectories: true, attributes: nil)
    try stringCov.write(to: coveragePercertFileUrl, atomically: true, encoding: .utf8)
} catch {
    print("⛔️ failed writing coverage percent to", coveragePercertFileUrl.path)
    print("error: ", error)
    print("exit(1)")
    exit(1)
}
print("✅ coverage written")