dev-cmd: add brew typecheck cmd

This PR adds a new `brew typecheck` developer command which checks for
typechecking errors in the current code with Sorbet.

Library/Homebrew/dev-cmd/typecheck.rb

@@ -0,0 +1,62 @@
+# frozen_string_literal: true
+
+require "cli/parser"
+
+module Homebrew
+  module_function
+
+  def typecheck_args
+    Homebrew::CLI::Parser.new do
+      usage_banner <<~EOS
+        `typecheck`
+
+        Check for typechecking errors using Sorbet.
+      EOS
+      switch "-q", "--quiet",
+             description: "Silence all non-critical errors."
+      switch "--update-definitions",
+             description: "Update Tapioca gem definitions of recently bumped gems"
+      switch "--fail-if-not-changed",
+             description: "Return a failing status code if all gems are up to date " \
+                          "and gem definitions do not need a tapioca update"
+      flag   "--dir=",
+             description: "Typecheck all files in a specific directory."
+      flag   "--file=",
+             description: "Typecheck a single file."
+      flag   "--ignore=",
+             description: "Ignores input files that contain the given string " \
+                          "in their paths (relative to the input path passed to Sorbet)."
+      conflicts "--dir", "--file"
+      max_named 0
+    end
+  end
+
+  def typecheck
+    args = typecheck_args.parse
+
+    Homebrew.install_bundler_gems!
+
+    HOMEBREW_LIBRARY_PATH.cd do
+      if args.update_definitions?
+        system "bundle", "exec", "tapioca", "sync"
+        system "bundle", "exec", "srb", "rbi", "hidden-definitions"
+
+        Homebrew.failed = system("git", "diff", "--stat", "--exit-code") if args.fail_if_not_changed?
+
+        return
+      end
+
+      srb_exec = %w[bundle exec srb tc]
+      srb_exec << "--quiet" if args.quiet?
+      srb_exec += ["--ignore", args.ignore] if args.ignore.present?
+      if args.file.present? || args.dir.present?
+        cd("sorbet")
+        srb_exec += ["--file", "../#{args.file}"] if args.file
+        srb_exec += ["--dir", "../#{args.dir}"] if args.dir
+      else
+        srb_exec += ["--typed-override", "sorbet/files.yaml"]
+      end
+      Homebrew.failed = !system(*srb_exec)
+    end
+  end
+end

Library/Homebrew/test/dev-cmd/typecheck_spec.rb

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+require "cmd/shared_examples/args_parse"
+
+describe "Homebrew.typecheck_args" do
+  it_behaves_like "parseable arguments"
+end

completions/internal_commands_list.txt

@@ -81,6 +81,7 @@ tap-info
 tap-new
 test
 tests
+typecheck
 uninstal
 uninstall
 unlink

docs/Manpage.md

@@ -1178,6 +1178,23 @@ Run Homebrew's unit and integration tests.
 * `--seed`:
   Randomise tests with the specified *`value`* instead of a random seed.
 
+### `typecheck`
+
+Check for typechecking errors using Sorbet.
+
+* `-q`, `--quiet`:
+  Silence all non-critical errors.
+* `--update-definitions`:
+  Update Tapioca gem definitions of recently bumped gems
+* `--fail-if-not-changed`:
+  Return a failing status code if all gems are up to date and gem definitions do not need a tapioca update
+* `--dir`:
+  Typecheck all files in a specific directory.
+* `--file`:
+  Typecheck a single file.
+* `--ignore`:
+  Ignores input files that contain the given string in their paths (relative to the input path passed to Sorbet).
+
 ### `unpack` [*`options`*] *`formula`*
 
 Unpack the source files for *`formula`* into subdirectories of the current

manpages/brew.1

@@ -1610,6 +1610,33 @@ Run only \fItest_script\fR\fB_spec\.rb\fR\. Appending \fB:\fR\fIline_number\fR w
 \fB\-\-seed\fR
 Randomise tests with the specified \fIvalue\fR instead of a random seed\.
 .
+.SS "\fBtypecheck\fR"
+Check for typechecking errors using Sorbet\.
+.
+.TP
+\fB\-q\fR, \fB\-\-quiet\fR
+Silence all non\-critical errors\.
+.
+.TP
+\fB\-\-update\-definitions\fR
+Update Tapioca gem definitions of recently bumped gems
+.
+.TP
+\fB\-\-fail\-if\-not\-changed\fR
+Return a failing status code if all gems are up to date and gem definitions do not need a tapioca update
+.
+.TP
+\fB\-\-dir\fR
+Typecheck all files in a specific directory\.
+.
+.TP
+\fB\-\-file\fR
+Typecheck a single file\.
+.
+.TP
+\fB\-\-ignore\fR
+Ignores input files that contain the given string in their paths (relative to the input path passed to Sorbet)\.
+.
 .SS "\fBunpack\fR [\fIoptions\fR] \fIformula\fR"
 Unpack the source files for \fIformula\fR into subdirectories of the current working directory\.
 .