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show the triggering brew command in the sudo password dialog

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The askpass script is now rewritten before each brew invocation with
the current command baked into the dialog text ("...to run: brew
upgrade tailscale-app") instead of a generic message written once at
launch. The command text is whitelisted to characters that cannot
break out of the shell/AppleScript quoting it is embedded in.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
maxsoch 2026-07-06 22:41:42 +02:00
parent 421ae5c40d
commit 89921275b8
1 changed files with 13 additions and 6 deletions
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19
BrewBar/BrewBarApp.swift
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@ -145,22 +145,29 @@ class AppDelegate: NSObject, NSApplicationDelegate {
return "brew"
}
/// Written once per launch; sudo runs it to show a GUI password dialog
/// whenever brew needs admin rights (no terminal is attached to Process).
static let askpassURL: URL = {
/// Rewritten before each brew command so the sudo password dialog can say
/// which command needs it. Sudo runs this script to show a GUI password
/// prompt whenever brew needs admin rights (no terminal is attached to
/// Process). If two brew commands overlap, the later one's text wins —
/// harmless, since prompts realistically only appear during upgrades.
static func writeAskpassScript(for command: String) -> URL {
let dir = FileManager.default.urls(for: .applicationSupportDirectory, in: .userDomainMask)[0]
.appendingPathComponent("BrewBar", isDirectory: true)
try? FileManager.default.createDirectory(at: dir, withIntermediateDirectories: true)
// the text lands inside shell single quotes AND an AppleScript string;
// whitelist characters that cannot break out of either
let safeCommand = command.filter { $0.isLetter || $0.isNumber || " ._@+=:/-".contains($0) }
let url = dir.appendingPathComponent("askpass.sh")
let script = """
#!/bin/zsh
osascript -e 'display dialog "BrewBar needs your administrator password to continue:" default answer "" with hidden answer with title "BrewBar" with icon caution buttons {"Cancel", "OK"} default button "OK"' -e 'text returned of result'
osascript -e 'display dialog "BrewBar needs your administrator password to run:\\n\\nbrew \(safeCommand)" default answer "" with hidden answer with title "BrewBar" with icon caution buttons {"Cancel", "OK"} default button "OK"' -e 'text returned of result'
"""
try? script.write(to: url, atomically: true, encoding: .utf8)
try? FileManager.default.setAttributes([.posixPermissions: 0o700], ofItemAtPath: url.path)
return url
}()
}
func runBrew(_ command: String, completion: @escaping (String) -> Void = { _ in }) {
DispatchQueue.global().async {
@ -177,7 +184,7 @@ class AppDelegate: NSObject, NSApplicationDelegate {
process.arguments = arguments
var environment = ProcessInfo.processInfo.environment
environment["SUDO_ASKPASS"] = Self.askpassURL.path
environment["SUDO_ASKPASS"] = Self.writeAskpassScript(for: cleaned).path
process.environment = environment
let pipe = Pipe()