Merge pull request #639 from nkcsgexi/bad-file-flag

PrebuiltModuleGen: allow retrying after hitting bad file descriptor error

Author: nkcsgexi

Sources/SwiftDriver/Jobs/PrebuiltModulesJob.swift

@@ -270,6 +270,8 @@ extension Driver {
       commandLine.append(.path(try VirtualPath(path: mcp)))
     }
     commandLine.appendFlag(.serializeParseableModuleInterfaceDependencyHashes)
+    commandLine.appendFlag(.badFileDescriptorRetryCount)
+    commandLine.appendFlag("30")
     return Job(
       moduleName: moduleName,
       kind: .compile,

Tests/SwiftDriverTests/ExplicitModuleBuildTests.swift

@@ -829,6 +829,7 @@ final class ExplicitModuleBuildTests: XCTestCase {
       XCTAssertTrue(jobs.allSatisfy {$0.kind == .compile})
       XCTAssertTrue(jobs.allSatisfy {$0.commandLine.contains(.flag("-compile-module-from-interface"))})
       XCTAssertTrue(jobs.allSatisfy {$0.commandLine.contains(.flag("-module-cache-path"))})
+      XCTAssertTrue(jobs.allSatisfy {$0.commandLine.contains(.flag("-bad-file-descriptor-retry-count"))})
       XCTAssertTrue(try jobs.allSatisfy {$0.commandLine.contains(.path(try VirtualPath(path: moduleCachePath)))})
       let HJobs = jobs.filter { $0.moduleName == "H"}
       XCTAssertTrue(HJobs.count == 3)