57 lines
2.8 KiB
Swift
57 lines
2.8 KiB
Swift
import Foundation
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import TermindDomain
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public nonisolated enum LinuxFilesystemParser {
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public static func parse(_ source: String) throws -> [MetricsFilesystem] {
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let parts = source.components(separatedBy: "__TERMIND_DF__\n")
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guard parts.count == 2 else { throw MetricsReadError.output }
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let pattern = try NSRegularExpression(pattern: #"^(.+?)\s+(\S+)\s+(\d+)\s+(\d+)\s+(-?\d+)\s+(\d+)%\s+(.+)$"#)
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var usage: [String: (Double, Double, Double)] = [:]
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for line in parts[1].split(separator: "\n").map(String.init) {
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guard let match = pattern.firstMatch(in: line, range: NSRange(line.startIndex..., in: line)) else {
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continue
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}
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func field(_ index: Int) -> String {
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Range(match.range(at: index), in: line).map { String(line[$0]) } ?? ""
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}
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guard let total = Double(field(3)), let used = Double(field(4)), let percent = Double(field(6)),
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total > 0, total.isFinite, used.isFinite, percent.isFinite
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else { continue }
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usage[field(7)] = (used * 1024, total * 1024, min(100, percent))
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}
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var result: [MetricsFilesystem] = []
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var seen = Set<String>()
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for line in parts[0].split(separator: "\n") {
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let sections = line.components(separatedBy: " - ")
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guard sections.count == 2 else { continue }
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let before = sections[0].split(separator: " ")
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let after = sections[1].split(separator: " ")
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guard before.count >= 6, after.count >= 2 else { continue }
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let mount = unescape(String(before[4]))
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let device = unescape(String(after[1]))
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let root = unescape(String(before[3]))
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guard root == "/" || after[0] == "btrfs" || mount == "/" else { continue }
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guard device.hasPrefix("/dev/") || mount == "/", seen.insert(mount).inserted else { continue }
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let capacity = usage[mount]
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result.append(
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MetricsFilesystem(
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mountPoint: mount, device: device, type: String(after[0]), blockID: String(before[2]),
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used: capacity?.0, total: capacity?.1, usedPercent: capacity?.2
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))
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}
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return result.sorted {
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if $0.mountPoint == "/" { return $1.mountPoint != "/" }
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if $1.mountPoint == "/" { return false }
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return $0.mountPoint.localizedStandardCompare($1.mountPoint) == .orderedAscending
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}
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}
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private static func unescape(_ text: String) -> String {
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// Decode mountinfo's octal escaping once, with backslash last.
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text.replacingOccurrences(of: #"\040"#, with: " ")
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.replacingOccurrences(of: #"\011"#, with: "\t")
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.replacingOccurrences(of: #"\012"#, with: "\n")
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.replacingOccurrences(of: #"\134"#, with: "\\")
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}
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}
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