Improve cask audit

Library/Homebrew/cask/audit.rb

@@ -226,6 +226,7 @@ def audit_no_string_version_latest
     sig { void }
     def audit_sha256_no_check_if_latest
       return unless cask.sha256
+      return unless cask.version
 
       odebug "Auditing sha256 :no_check with version :latest"
       return unless cask.version.latest?
@@ -268,7 +269,7 @@ def audit_sha256_invalid
 
     sig { void }
     def audit_latest_with_livecheck
-      return unless cask.version.latest?
+      return unless cask.version&.latest?
       return unless cask.livecheckable?
       return if cask.livecheck.skip?
 
@@ -277,7 +278,7 @@ def audit_latest_with_livecheck
 
     sig { void }
     def audit_latest_with_auto_updates
-      return unless cask.version.latest?
+      return unless cask.version&.latest?
       return unless cask.auto_updates
 
       add_error "Casks with `version :latest` should not use `auto_updates`."
@@ -288,7 +289,8 @@ def audit_latest_with_auto_updates
     sig { params(livecheck_result: T.any(NilClass, T::Boolean, Symbol)).void }
     def audit_hosting_with_livecheck(livecheck_result: audit_livecheck_version)
       return if cask.discontinued?
-      return if cask.version.latest?
+      return if cask.version&.latest?
+      return unless cask.url
       return if block_url_offline?
       return if cask.livecheckable?
       return if livecheck_result == :auto_detected
@@ -328,6 +330,7 @@ def audit_download_url_format
 
     sig { void }
     def audit_unnecessary_verified
+      return unless cask.url
       return if block_url_offline?
       return unless verified_present?
       return unless url_match_homepage?
@@ -340,6 +343,7 @@ def audit_unnecessary_verified
 
     sig { void }
     def audit_missing_verified
+      return unless cask.url
       return if block_url_offline?
       return if file_url?
       return if url_match_homepage?
@@ -352,6 +356,7 @@ def audit_missing_verified
 
     sig { void }
     def audit_no_match
+      return unless cask.url
       return if block_url_offline?
       return unless verified_present?
       return if verified_matches_url?
@@ -453,6 +458,7 @@ def audit_download
 
     sig { void }
     def audit_livecheck_unneeded_long_version
+      return if cask.version.nil? || cask.url.nil?
       return if cask.livecheck.strategy != :sparkle
       return unless cask.version.csv.second
       return if cask.url.to_s.include? cask.version.csv.second
@@ -506,6 +512,7 @@ def audit_signing
     sig { returns(T.any(NilClass, T::Boolean, Symbol)) }
     def audit_livecheck_version
       return unless online?
+      return unless cask.version
 
       referenced_cask, = Homebrew::Livecheck.resolve_livecheck_reference(cask)
 

Library/Homebrew/cask/download.rb

@@ -36,6 +36,8 @@ def checksum
 
     sig { override.returns(T.nilable(Version)) }
     def version
+      return if cask.version.nil?
+
       @version ||= Version.new(cask.version)
     end
 

Library/Homebrew/cmd/fetch.rb

@@ -166,7 +166,7 @@ def self.fetch
           SimulateSystem.with os: os, arch: arch do
             cask = Cask::CaskLoader.load(ref)
 
-            if cask.url.nil?
+            if cask.url.nil? || cask.sha256.nil?
               opoo "Cask #{cask} is not supported on os #{os} and arch #{arch}"
               next
             end

Library/Homebrew/dev-cmd/audit.rb

@@ -242,17 +242,10 @@ def self.audit
         next [] if os == :linux
 
         SimulateSystem.with os: os, arch: arch do
-          simulated_cask = Cask::CaskLoader.load(path)
-
-          if simulated_cask.url.nil?
-            opoo "Cask #{cask} is not supported on os #{os} and arch #{arch}"
-            next []
-          end
-
           odebug "Auditing Cask #{cask} on os #{os} and arch #{arch}"
 
           Cask::Auditor.audit(
-            simulated_cask,
+            Cask::CaskLoader.load(path),
             # For switches, we add `|| nil` so that `nil` will be passed
             # instead of `false` if they aren't set.
             # This way, we can distinguish between "not set" and "set to false".