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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,94 @@ | ||
| import Cocoa | ||
| import Foundation | ||
| import os.log | ||
| import SwiftExec | ||
|
|
||
| /// View controller for previewing tarballs (may be gzipped). | ||
| class TARPreviewVC: OutlinePreviewVC, PreviewVC { | ||
| let linesRegex = #"([\w-]{10}) \d+ .+ .+ + (\d+) (\w{3} \d+ +[\d:]+) (.*)"# | ||
|
|
||
| let byteCountFormatter = ByteCountFormatter() | ||
| let dateFormatter1 = DateFormatter() | ||
| let dateFormatter2 = DateFormatter() | ||
|
|
||
| override init(nibName nibNameOrNil: NSNib.Name?, bundle nibBundleOrNil: Bundle?, file: File) { | ||
| super.init(nibName: nibNameOrNil, bundle: nibBundleOrNil, file: file) | ||
| initDateFormatters() | ||
| } | ||
|
|
||
| /// Sets up `dateFormatter1` and `dateFormatter2` to parse date strings from `tar` output. Date | ||
| /// strings may be in one of the following formats: | ||
| /// | ||
| /// - "MMM dd HH:mm", e.g. "Mar 28 15:36" (date is in current year) | ||
| /// - "MMM dd yyyy", e.g. "Dec 29 2018" | ||
| private func initDateFormatters() { | ||
| // Set default date to today to parse dates in current year | ||
| dateFormatter1.defaultDate = Date() | ||
|
|
||
| // Specify date formats | ||
| dateFormatter1.dateFormat = "MMM dd HH:mm" | ||
| dateFormatter2.dateFormat = "MMM dd yyyy" | ||
| } | ||
|
|
||
| /// Parses a date string from `tar` output to a `Date` object. | ||
| private func parseDate(dateString: String) -> Date? { | ||
| if dateString.contains(":") { | ||
| return dateFormatter1.date(from: dateString) | ||
| } else { | ||
| return dateFormatter2.date(from: dateString) | ||
| } | ||
| } | ||
|
|
||
| /// Parses the output of the `tar` command. | ||
| private func parseTARFileTree(file: File, lines: String) -> FileTree { | ||
| let fileTree = FileTree() | ||
|
|
||
| // Create node for root directory (not contained in `tar` output) | ||
| try! fileTree.addNode( | ||
| path: file.url.lastPathComponent.components(separatedBy: ".")[0], | ||
| isDirectory: true, | ||
| size: 0, | ||
| dateModified: file.attributes[FileAttributeKey.modificationDate] as? Date ?? Date() | ||
| ) | ||
|
|
||
| // Content lines: "-rw-r--r-- 0 user staff 642 Dec 29 2018 my-tar/file.ext" | ||
| // - "-" as first character indicates a file, "d" a directory | ||
| // - Digits before date indicate number of bytes | ||
| let linesMatched = lines.matchRegex(regex: linesRegex) | ||
| for match in linesMatched { | ||
| do { | ||
| // Add file/directory node to tree | ||
| try fileTree.addNode( | ||
| path: match[4], | ||
| isDirectory: match[1].first == "d", | ||
| size: Int(match[2]) ?? -1, | ||
| dateModified: parseDate(dateString: match[3]) ?? Date() | ||
| ) | ||
| } catch { | ||
| os_log("%s", type: .error, error.localizedDescription) | ||
| } | ||
| } | ||
|
|
||
| return fileTree | ||
| } | ||
|
|
||
| func loadPreview() throws { | ||
| // Run `tar` command | ||
| let result = try exec( | ||
| program: "/usr/bin/tar", | ||
| arguments: [ | ||
| "--gzip", // Allows listing contents of `.tar.gz` files | ||
| "--list", | ||
| "--verbose", | ||
| "--file", | ||
| file.path, | ||
| ] | ||
| ) | ||
|
|
||
| // Parse command output | ||
| let fileTree = parseTARFileTree(file: file, lines: result.stdout ?? "") | ||
|
|
||
| // Load data into outline view | ||
| loadData(fileTree: fileTree, labelText: nil) | ||
| } | ||
| } |
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