Insert bash -c parameter as needed

Author: finestructure

Sources/Argument.swift

@@ -1,7 +1,7 @@
 import Foundation
 
 
-public enum Argument {
+public enum Argument: Equatable {
     case quoted(QuotedString)
     case verbatim(String)
 

Sources/QuotedString.swift

@@ -1,7 +1,7 @@
 import ShellQuote
 
 
-public struct QuotedString {
+public struct QuotedString: Equatable {
     public var unquoted: String
     public var quoted: String
 

Sources/ShellOut.swift

@@ -129,7 +129,8 @@ extension ShellOutCommand: CustomStringConvertible {
 
 public extension ShellOutCommand {
     static func bash(arguments: [Argument]) -> Self {
-        .init(command: "bash", arguments: ["-c", arguments.map(\.string).joined(separator: " ")])
+        let arguments = arguments.first == "-c" ? Array(arguments.dropFirst()) : arguments
+        return .init(command: "bash", arguments: ["-c", arguments.map(\.string).joined(separator: " ")])
     }
 }
 

Tests/ShellOutTests/ShellOutTests.swift

@@ -191,6 +191,15 @@ class ShellOutTests: XCTestCase {
         await XCTAssertEqualAsync(try await shellOut(to: .readFile(at: filePath), logger: .init(label: "test")).stdout, "Hello again")
     }
 
+    func testBash() async throws {
+        // Without explicit -c parameter
+        await XCTAssertEqualAsync(try await shellOut(to: .bash(arguments: ["echo", "foo"])).stdout,
+                                  "foo")
+        // With explicit -c parameter
+        await XCTAssertEqualAsync(try await shellOut(to: .bash(arguments: ["-c", "echo", "foo"])).stdout,
+                                  "foo")
+    }
+
     func testBashArgumentQuoting() async throws {
         await XCTAssertEqualAsync(try await shellOut(to: .bash(arguments: ["echo",
                                                                            "foo ; echo bar".quoted])).stdout,