fetch: add --all-platforms switch

- Iterate `[:macos, :linux] × [:intel, :arm]` (4 combos) for verifying
  multi-platform cask URLs and checksums in a single command, instead
  of `--os=all --arch=all` which iterates every macOS codename.
- Tolerate `CaskInvalidError`/`CaskUnreadableError` during multi-combo
  fetches for casks that legitimately omit some platforms (mirrors the
  `bump-cask-pr.rb` rescue pattern).

Signed-off-by: Patrick Linnane <patrick@linnane.io>

Author: p-linnane

Library/Homebrew/cli/args.rb

@@ -126,6 +126,8 @@ def only_formula_or_cask
 
       sig { returns(T::Array[[Symbol, Symbol]]) }
       def os_arch_combinations
+        return OnSystem::BASE_OS_OPTIONS.product(OnSystem::ARCH_OPTIONS) if @table[:all_platforms?]
+
         skip_invalid_combinations = false
 
         oses = case (os_sym = @table[:os]&.to_sym)

Library/Homebrew/cmd/fetch.rb

@@ -25,6 +25,8 @@ class FetchCmd < AbstractCommand
         flag   "--arch=",
                description: "Download for the given CPU architecture. " \
                             "(Pass `all` to download for all architectures.)"
+        switch "--all-platforms",
+               description: "Download for every supported OS and CPU architecture combination."
         flag   "--bottle-tag=",
                description: "Download a bottle for given tag."
         switch "--HEAD",
@@ -65,6 +67,9 @@ class FetchCmd < AbstractCommand
         conflicts "--formula", "--cask"
         conflicts "--os", "--bottle-tag"
         conflicts "--arch", "--bottle-tag"
+        conflicts "--all-platforms", "--os"
+        conflicts "--all-platforms", "--arch"
+        conflicts "--all-platforms", "--bottle-tag"
 
         named_args [:formula, :cask], min: 1
       end
@@ -160,9 +165,13 @@ def run
 
             os_arch_combinations.each do |os, arch|
               SimulateSystem.with(os:, arch:) do
-                cask = Cask::CaskLoader.load(ref)
+                loaded_cask = begin
+                  Cask::CaskLoader.load(ref)
+                rescue Cask::CaskInvalidError, Cask::CaskUnreadableError
+                  raise unless cask.on_system_blocks_exist?
+                end
 
-                if cask.url.nil? || cask.sha256.nil?
+                if loaded_cask.nil? || loaded_cask.url.nil? || loaded_cask.sha256.nil?
                   opoo "Cask #{cask} is not supported on os #{os} and arch #{arch}"
                   next
                 end
@@ -171,7 +180,7 @@ def run
                 quarantine = true if quarantine.nil?
 
                 download = Cask::Download.new(
-                  cask,
+                  loaded_cask,
                   quarantine:,
                   require_sha: Homebrew::EnvConfig.cask_opts_require_sha?,
                 )

Library/Homebrew/sorbet/rbi/dsl/homebrew/cmd/fetch_cmd.rbi

@@ -1453,6 +1453,7 @@ _brew_fetch() {
     -*)
       __brewcomp "
       --HEAD
+      --all-platforms
       --arch
       --bottle-tag
       --build-bottle

completions/bash/brew

@@ -974,6 +974,7 @@ __fish_brew_complete_arg 'extract' -a '(__fish_brew_suggest_taps_installed)'
 
 __fish_brew_complete_cmd 'fetch' 'Download a bottle (if available) or source packages for formulae and binaries for casks'
 __fish_brew_complete_arg 'fetch' -l HEAD -d 'Fetch HEAD version instead of stable version'
+__fish_brew_complete_arg 'fetch' -l all-platforms -d 'Download for every supported OS and CPU architecture combination'
 __fish_brew_complete_arg 'fetch' -l arch -d 'Download for the given CPU architecture. (Pass `all` to download for all architectures.)'
 __fish_brew_complete_arg 'fetch' -l bottle-tag -d 'Download a bottle for given tag'
 __fish_brew_complete_arg 'fetch' -l build-bottle -d 'Download source packages (for eventual bottling) rather than a bottle'

completions/fish/brew.fish

@@ -1274,16 +1274,17 @@ _brew_extract() {
 _brew_fetch() {
   _arguments \
     '(--cask)--HEAD[Fetch HEAD version instead of stable version]' \
-    '(--bottle-tag)--arch[Download for the given CPU architecture. (Pass `all` to download for all architectures.)]' \
-    '(--build-from-source --build-bottle --force-bottle --cask --os --arch)--bottle-tag[Download a bottle for given tag]' \
+    '(--os --arch --bottle-tag)--all-platforms[Download for every supported OS and CPU architecture combination]' \
+    '(--bottle-tag --all-platforms)--arch[Download for the given CPU architecture. (Pass `all` to download for all architectures.)]' \
+    '(--build-from-source --build-bottle --force-bottle --cask --os --arch --all-platforms)--bottle-tag[Download a bottle for given tag]' \
     '(--build-from-source --force-bottle --bottle-tag --cask)--build-bottle[Download source packages (for eventual bottling) rather than a bottle]' \
     '(--build-bottle --force-bottle --bottle-tag)--build-from-source[Download source packages rather than a bottle]' \
     '--debug[Display any debugging information]' \
     '(--cask)--deps[Also download dependencies for any listed formula]' \
     '--force[Remove a previously cached version and re-fetch]' \
     '(--build-from-source --build-bottle --bottle-tag --cask)--force-bottle[Download a bottle if it exists for the current or newest version of macOS, even if it would not be used during installation]' \
     '--help[Show this message]' \
-    '(--bottle-tag)--os[Download for the given operating system. (Pass `all` to download for all operating systems.)]' \
+    '(--bottle-tag --all-platforms)--os[Download for the given operating system. (Pass `all` to download for all operating systems.)]' \
     '--quiet[Make some output more quiet]' \
     '--retry[Retry if downloading fails or re-download if the checksum of a previously cached version no longer matches. Tries at most 5 times with exponential backoff]' \
     '--verbose[Do a verbose VCS checkout, if the URL represents a VCS. This is useful for seeing if an existing VCS cache has been updated]' \

completions/zsh/_brew

@@ -993,6 +993,10 @@ binaries for *`cask`*s. For files, also print SHA-256 checksums.
 : Download for the given CPU architecture. (Pass `all` to download for all
   architectures.)
 
+`--all-platforms`
+
+: Download for every supported OS and CPU architecture combination.
+
 `--bottle-tag`
 
 : Download a bottle for given tag.

docs/Manpage.md

@@ -650,6 +650,9 @@ Download for the given operating system\. (Pass \fBall\fP to download for all op
 \fB\-\-arch\fP
 Download for the given CPU architecture\. (Pass \fBall\fP to download for all architectures\.)
 .TP
+\fB\-\-all\-platforms\fP
+Download for every supported OS and CPU architecture combination\.
+.TP
 \fB\-\-bottle\-tag\fP
 Download a bottle for given tag\.
 .TP