Revert "Revert "Revert "[Cartfile] Reject git or ssh protocol as …

…a `github` origin as it does not make sense"""

This reverts commit 38062d1.

Carthage.xcodeproj/project.pbxproj

@@ -57,7 +57,6 @@
 		BF7A1A0B1E3A7AE9008CBCC5 /* BinaryProject.swift in Sources */ = {isa = PBXBuildFile; fileRef = BF7A1A091E3A7188008CBCC5 /* BinaryProject.swift */; };
 		BFFA7A631E3AAFD200CB95A7 /* BinaryProjectSpec.swift in Sources */ = {isa = PBXBuildFile; fileRef = BFFA7A621E3AAFD200CB95A7 /* BinaryProjectSpec.swift */; };
 		CD09E28B1F0E3FFB00A0378A /* FakeSwift.framework in Resources */ = {isa = PBXBuildFile; fileRef = CD09E2881F0E3F1400A0378A /* FakeSwift.framework */; };
-		CD1491CD2142CF6D000C9CE1 /* GitHubSpec.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD1491CC2142CF6D000C9CE1 /* GitHubSpec.swift */; };
 		CD28C99D1E11846200322AF7 /* ProductType.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD28C99C1E11846200322AF7 /* ProductType.swift */; };
 		CD3E530B1DE33095002C135C /* Availability.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD3E530A1DE33095002C135C /* Availability.swift */; };
 		CD43D9DA1F41640E00CD60F6 /* CarthageKitVersion.swift in Sources */ = {isa = PBXBuildFile; fileRef = CD43D9D91F41640E00CD60F6 /* CarthageKitVersion.swift */; };
@@ -235,7 +234,6 @@
 		BF7A1A091E3A7188008CBCC5 /* BinaryProject.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BinaryProject.swift; sourceTree = "<group>"; };
 		BFFA7A621E3AAFD200CB95A7 /* BinaryProjectSpec.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = BinaryProjectSpec.swift; sourceTree = "<group>"; };
 		CD09E2881F0E3F1400A0378A /* FakeSwift.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; path = FakeSwift.framework; sourceTree = "<group>"; };
-		CD1491CC2142CF6D000C9CE1 /* GitHubSpec.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = GitHubSpec.swift; sourceTree = "<group>"; };
 		CD28C99C1E11846200322AF7 /* ProductType.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = ProductType.swift; sourceTree = "<group>"; };
 		CD3E530A1DE33095002C135C /* Availability.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = Availability.swift; sourceTree = "<group>"; };
 		CD43D9D91F41640E00CD60F6 /* CarthageKitVersion.swift */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.swift; path = CarthageKitVersion.swift; sourceTree = "<group>"; };
@@ -595,7 +593,6 @@
 				D0D121DF19E8999E005E4BAA /* CartfileSpec.swift */,
 				BF3199BF1E32E078007DC0D1 /* DependencySpec.swift */,
 				89A8F1771C24AB3C00C0E75A /* FrameworkExtensionsSpec.swift */,
-				CD1491CC2142CF6D000C9CE1 /* GitHubSpec.swift */,
 				CDA0B6C91C468E67006C499C /* GitURLSpec.swift */,
 				549B47AF1A4F17FF002498C7 /* ProjectSpec.swift */,
 				0FDFEA7D2055D638008862E3 /* ProxyTests.swift */,
@@ -923,7 +920,6 @@
 				D0DB09A419EA354200234B16 /* XcodeSpec.swift in Sources */,
 				0FDFEA7E2055D638008862E3 /* ProxyTests.swift in Sources */,
 				3A0472F61C7836EA00097EC7 /* AlgorithmsSpec.swift in Sources */,
-				CD1491CD2142CF6D000C9CE1 /* GitHubSpec.swift in Sources */,
 				BFFA7A631E3AAFD200CB95A7 /* BinaryProjectSpec.swift in Sources */,
 				D0C6E5741A57040B00A5E3E7 /* ArchiveSpec.swift in Sources */,
 				549B47B11A4F1A34002498C7 /* ProjectSpec.swift in Sources */,

Documentation/Artifacts.md

@@ -21,8 +21,6 @@ github "ReactiveCocoa/ReactiveCocoa" # GitHub.com
 github "https://enterprise.local/ghe/desktop/git-error-translations" # GitHub Enterprise
 ```
 
-`github` origin is for specifying by `owner/repo` form or using prebuilt binary download feature through its web API, so using `git` or `ssh` protocol for `github` origin does not make sense and will be an error.
-
 ##### Git repositories
 
 Other Git repositories are specified with the `git` keyword:

Source/CarthageKit/GitHub.swift

@@ -49,10 +49,6 @@ extension Repository {
 		// Hostname-based → GitHub Enterprise
 		guard
 			let url = URL(string: identifier),
-			let scheme = url.scheme,
-			// Reject `git` or `ssh` protocol as a `github` origin as it does not make sense.
-			// See https://github.com/Carthage/Carthage/issues/2379.
-			(scheme == "http" || scheme == "https"),
 			let host = url.host,
 			case var pathComponents = url.pathComponents.filter({ $0 != "/" }),
 			pathComponents.count >= 2,