Remove access to incomplete commands

This temporarily removes the update and self-update commands because
they are only partially implemented and are untested. It also updates
the list-available command to be clear that it doesn't currently
support listing available snapshots.

Author: patrickfreed

Sources/Swiftly/ListAvailable.swift

@@ -29,6 +29,8 @@ struct ListAvailable: SwiftlyCommand {
 
             $ swiftly list-available main-snapshot
             $ swiftly list-available 5.7-snapshot
+
+        Note that listing available snapshots is currently unsupported. It will be introduced in a future release.
         """
     ))
     var toolchainSelector: String?
@@ -38,6 +40,13 @@ struct ListAvailable: SwiftlyCommand {
             try ToolchainSelector(parsing: input)
         }
 
+        if let selector {
+            guard !selector.isSnapshotSelector() else {
+                SwiftlyCore.print("Listing available snapshots is not currently supported.")
+                return
+            }
+        }
+
         let toolchains = try await HTTP.getReleaseToolchains()
             .map(ToolchainVersion.stable)
             .filter { selector?.matches(toolchain: $0) ?? true }
@@ -54,7 +63,7 @@ struct ListAvailable: SwiftlyCommand {
             } else if installedToolchains.contains(toolchain) {
                 message += " (installed)"
             }
-            print(message)
+            SwiftlyCore.print(message)
         }
 
         if let selector {
@@ -74,25 +83,25 @@ struct ListAvailable: SwiftlyCommand {
                 modifier = "matching"
             }
 
-            let message = "available \(modifier) toolchains"
-            print(message)
-            print(String(repeating: "-", count: message.utf8.count))
+            let message = "Available \(modifier) toolchains"
+            SwiftlyCore.print(message)
+            SwiftlyCore.print(String(repeating: "-", count: message.utf8.count))
             for toolchain in toolchains {
                 printToolchain(toolchain)
             }
         } else {
-            print("available release toolchains")
+            print("Available release toolchains")
             print("----------------------------")
             for toolchain in toolchains where toolchain.isStableRelease() {
                 printToolchain(toolchain)
             }
 
-            print("")
-            print("available snapshot toolchains")
-            print("-----------------------------")
-            for toolchain in toolchains where toolchain.isSnapshot() {
-                printToolchain(toolchain)
-            }
+            // print("")
+            // print("Available snapshot toolchains")
+            // print("-----------------------------")
+            // for toolchain in toolchains where toolchain.isSnapshot() {
+            //     printToolchain(toolchain)
+            // }
         }
     }
 }

Sources/Swiftly/Swiftly.swift

@@ -17,10 +17,8 @@ public struct Swiftly: SwiftlyCommand {
             Install.self,
             Use.self,
             Uninstall.self,
-            Update.self,
             List.self,
             ListAvailable.self,
-            SelfUpdate.self,
         ]
     )
 

Sources/SwiftlyCore/HTTPClient+GitHubAPI.swift

@@ -59,7 +59,8 @@ extension HTTP {
     /// The results are returned in lexicographic order.
     internal static func getReleases(page: Int, perPage: Int = 100) async throws -> [GitHubTag] {
         let url = "https://api.github.com/repos/apple/swift/releases?per_page=\(perPage)&page=\(page)"
-        return try await Self.getFromGitHub(url: url)
+        let releases: [GitHubRelease] = try await Self.getFromGitHub(url: url)
+        return releases.filter { !$0.prerelease }.map { $0.toGitHubTag() }
     }
 
     /// Get a list of tags on the apple/swift GitHub repository.
@@ -72,6 +73,17 @@ extension HTTP {
     }
 }
 
+/// Model of a GitHub REST API release object.
+/// See: https://docs.github.com/en/rest/releases/releases?apiVersion=2022-11-28#list-releases
+private struct GitHubRelease: Decodable {
+    fileprivate let name: String
+    fileprivate let prerelease: Bool
+
+    fileprivate func toGitHubTag() -> GitHubTag {
+        GitHubTag(name: self.name, commit: nil)
+    }
+}
+
 /// Model of a GitHub REST API tag/release object.
 internal struct GitHubTag: Decodable {
     internal struct Commit: Decodable {