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Check the Mach headers when there is no Info.plist
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,146 @@ | ||
| import Foundation | ||
| import MachO.loader | ||
| import ReactiveTask | ||
| import ReactiveSwift | ||
| import Result | ||
|
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| /// Represents a Mach header | ||
| /// | ||
| /// Provides a unified structure for | ||
| /// `MachO.loader.mach_header` and `MachO.loader.mach_header_64` | ||
|
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| struct MachHeader { | ||
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| enum Endianness { | ||
| case little | ||
| case big | ||
| } | ||
|
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| let magic: UInt32 | ||
| let cpuType: cpu_type_t | ||
| let cpuSubtype: cpu_type_t | ||
| let fileType: UInt32 | ||
| let ncmds: UInt32 | ||
| let sizeofcmds: UInt32 | ||
| let flags: UInt32 | ||
| let reserved: UInt32? | ||
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| var is64BitHeader: Bool { | ||
|
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| return magic == MH_MAGIC_64 || magic == MH_CIGAM_64 | ||
| } | ||
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| var is32BitHeader: Bool { | ||
|
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| return !is64BitHeader | ||
| } | ||
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| var endianess: Endianness { | ||
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| return magic == MH_CIGAM_64 || magic == MH_CIGAM ? .big : .little | ||
| } | ||
| } | ||
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| extension MachHeader { | ||
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| static let carthageSupportedFileTypes: Set<UInt32> = { | ||
| return Set([ | ||
| MH_OBJECT, // Carthage accepts static libraries | ||
| MH_BUNDLE, // Bundles https://github.com/ResearchKit/ResearchKit/blob/1.3.0/ResearchKit/Info.plist#L15-L16 | ||
| MH_DYLIB, // or dynamic shared libraries | ||
| ].map { UInt32($0) } | ||
| ) | ||
| }() | ||
| } | ||
|
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||
| extension MachHeader { | ||
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| /// Reads the Mach headers from a Mach-O file. | ||
| /// - Parameter url: The url of the Mach-O file | ||
| /// - Remark: Uses `objdump` to read the header and parse the output. | ||
| /// The output is composed of one or more sets of lines like the following: | ||
| /// | ||
| /// Mach header | ||
| /// magic cputype cpusubtype caps filetype ncmds sizeofcmds flags | ||
| /// 0xfeedfacf 16777223 3 0x00 1 8 1720 0x00002000 | ||
| /// | ||
| /// - See Also: [LLVM MachODump.cpp](https://llvm.org/viewvc/llvm-project/llvm/trunk/tools/llvm-objdump/MachODump.cpp?view=markup&pathrev=225383###see%C2%B7line%C2%B72745) | ||
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| static func headers(forMachOFileAtUrl url: URL) -> SignalProducer<MachHeader, CarthageError> { | ||
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| // This is the command `otool -h` actually invokes | ||
| let task = Task("/usr/bin/xcrun", arguments: [ | ||
| "objdump", | ||
| "-macho", | ||
| "-private-header", | ||
| "-non-verbose", | ||
| url.resolvingSymlinksInPath().path | ||
| ] | ||
| ) | ||
|
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| return task.launch(standardInput: nil) | ||
| .ignoreTaskData() | ||
| .map { String(data: $0, encoding: .utf8) ?? "" } | ||
| .filter { !$0.isEmpty } | ||
| .flatMap(.merge) { (output: String) -> SignalProducer<(String, String), NoError> in | ||
| output.linesProducer.combinePrevious() | ||
| }.filterMap { (previousLine, currentLine) -> MachHeader? in | ||
|
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| let previousLineComponents = previousLine | ||
| .components(separatedBy: CharacterSet.whitespaces) | ||
| .filter { !$0.isEmpty } | ||
| let currentLineComponents = currentLine | ||
| .components(separatedBy: CharacterSet.whitespaces) | ||
| .filter { !$0.isEmpty } | ||
|
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| let strippedComponents = currentLineComponents | ||
| .map { $0.stripping(prefix: "0x")} | ||
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| let magicIdentifiers = [ | ||
| MH_MAGIC_64, | ||
| MH_CIGAM_64, | ||
| MH_MAGIC, | ||
| MH_CIGAM, | ||
| ].lazy | ||
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| guard previousLineComponents == [ | ||
| "magic", | ||
| "cputype", | ||
| "cpusubtype", | ||
| "caps", | ||
| "filetype", | ||
| "ncmds", | ||
| "sizeofcmds", | ||
| "flags" | ||
| ] | ||
| , !strippedComponents.isEmpty | ||
| , let magic = UInt32(strippedComponents.first!, radix:16) | ||
| , magicIdentifiers.first(where: { $0 == magic }) != nil else { | ||
| return nil | ||
| } | ||
|
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| guard | ||
| let cpuType = cpu_type_t(strippedComponents[1], radix: 10), | ||
| let cpuSubtype = cpu_subtype_t(strippedComponents[2], radix: 10), | ||
| let fileType = UInt32(strippedComponents[4], radix: 10), | ||
| let ncmds = UInt32(strippedComponents[5], radix: 10), | ||
| let sizeofcmds = UInt32(strippedComponents[6], radix: 10), | ||
| let flags = UInt32(strippedComponents[7], radix: 16) | ||
| else { | ||
| return nil | ||
| } | ||
|
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| return MachHeader( | ||
| magic: magic, | ||
| cpuType: cpuType, | ||
| cpuSubtype: cpuSubtype, | ||
| fileType: fileType, | ||
| ncmds: ncmds, | ||
| sizeofcmds: sizeofcmds, | ||
| flags: flags, | ||
| reserved: nil | ||
| ) | ||
| } | ||
| .mapError(CarthageError.taskError) | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,27 @@ | ||
| @testable import CarthageKit | ||
| import Foundation | ||
| import Nimble | ||
| import Quick | ||
| import ReactiveSwift | ||
| import Result | ||
|
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| class MachHeaderSpec: QuickSpec { | ||
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| override func spec() { | ||
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| describe("headers") { | ||
| it("should list all mach headers for a given Mach-O file") { | ||
| let directoryURL = Bundle(for: type(of: self)).url(forResource: "Alamofire.framework", withExtension: nil)! | ||
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| let result = CarthageKit | ||
| .MachHeader | ||
| .headers(forMachOFileAtUrl: directoryURL.appendingPathComponent("Alamofire")) | ||
| .collect() | ||
| .single() | ||
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| expect(result?.value?.count) == 36 | ||
| } | ||
| } | ||
| } | ||
|
|
||
| } |
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