dispatch-build-bottle: support Linux

Library/Homebrew/dev-cmd/dispatch-build-bottle.rb

@@ -25,7 +25,10 @@ module Homebrew
              description: "Dispatch specified workflow (default: `dispatch-build-bottle.yml`)."
       switch "--upload",
              description: "Upload built bottles to Bintray."
+      switch "--linux",
+             description: "Dispatch bottle for Linux (using GitHub runners)."
 
+      conflicts "--macos", "--linux"
       named_args :formula, min: 1
     end
   end
@@ -33,45 +36,55 @@ module Homebrew
   def dispatch_build_bottle
     args = dispatch_build_bottle_args.parse
 
-    # Fixup version for ARM/Apple Silicon
-    # TODO: fix label name to be 11-arm64 instead and remove this.
-    args.macos&.gsub!(/^11-arm$/, "11-arm64")
-
-    macos = args.macos&.yield_self do |s|
-      MacOS::Version.from_symbol(s.to_sym)
-    rescue MacOSVersionError
-      MacOS::Version.new(s)
-    end
-
-    raise UsageError, "Must specify --macos option" if macos.blank?
-
-    # Fixup label for ARM/Apple Silicon
-    macos_label = if macos.arch == :arm64
-      # TODO: fix label name to be 11-arm64 instead.
-      "#{macos}-arm"
-    else
-      macos.to_s
-    end
-
     tap = Tap.fetch(args.tap || CoreTap.instance.name)
     user, repo = tap.full_name.split("/")
-
-    workflow = args.workflow || "dispatch-build-bottle.yml"
     ref = "master"
+    workflow = args.workflow || "dispatch-build-bottle.yml"
+
+    # Ensure we dispatch the bottle in homebrew/homebrew-core
+    # TODO: remove when core taps are merged
+    repo.gsub!("linux", "home") unless args.tap
+
+    if (macos = args.macos)
+      # Fixup version for ARM/Apple Silicon
+      # TODO: fix label name to be 11-arm64 instead and remove this.
+      macos.gsub!(/^11-arm$/, "11-arm64")
+
+      macos = macos.yield_self do |s|
+        MacOS::Version.from_symbol(s.to_sym)
+      rescue MacOSVersionError
+        MacOS::Version.new(s)
+      end
+
+      # Fixup label for ARM/Apple Silicon
+      macos_label = if macos.arch == :arm64
+        # TODO: fix label name to be 11-arm64 instead.
+        "#{macos}-arm"
+      else
+        macos.to_s
+      end
+
+      dispatching_for = "macOS #{macos}"
+    elsif T.unsafe(args).linux?
+      workflow = args.workflow || "linux-#{workflow}"
+      dispatching_for = "Linux"
+    else
+      raise UsageError, "Must specify --macos or --linux option"
+    end
 
     args.named.to_resolved_formulae.each do |formula|
       # Required inputs
       inputs = {
         formula: formula.name,
-        macos:   macos_label,
       }
 
       # Optional inputs
       # These cannot be passed as nil to GitHub API
+      inputs[:macos] = macos_label if args.macos
       inputs[:issue] = args.issue if args.issue
       inputs[:upload] = args.upload?.to_s if args.upload?
 
-      ohai "Dispatching #{tap} bottling request of formula \"#{formula.name}\" for macOS #{macos}"
+      ohai "Dispatching #{tap} bottling request of formula \"#{formula.name}\" for #{dispatching_for}"
       GitHub.workflow_dispatch_event(user, repo, workflow, ref, inputs)
     end
   end