Use constants for LinkedKegs/PinnedKegs/Locks.

These definitions are scattered throughout the codebase which makes it
hard to refactor them later (my goal is to move them outside of
HOMEBREW_LIBRARY). Unify their definitions for clearer code and easier
movement later.

15 files changed, 45 insertions, 46 deletions

diff --git a/Library/Homebrew/cmd/list.rb b/Library/Homebrew/cmd/list.rb
index 9d5de74cc..ba236068d 100644
--- a/Library/Homebrew/cmd/list.rb
+++ b/Library/Homebrew/cmd/list.rb
@@ -111,7 +111,7 @@ module Homebrew
     if ARGV.include? "--pinned"
       pinned_versions = {}
       names.each do |d|
-        keg_pin = (HOMEBREW_LIBRARY/"PinnedKegs"/d.basename.to_s)
+        keg_pin = (HOMEBREW_PINNED_KEGS/d.basename.to_s)
         if keg_pin.exist? || keg_pin.symlink?
           pinned_versions[d] = keg_pin.readlink.basename.to_s
         end
diff --git a/Library/Homebrew/diagnostic.rb b/Library/Homebrew/diagnostic.rb
index 1b3018251..ff0d1f9ba 100644
--- a/Library/Homebrew/diagnostic.rb
+++ b/Library/Homebrew/diagnostic.rb
@@ -986,7 +986,7 @@ module Homebrew
 
       def check_for_unlinked_but_not_keg_only
         unlinked = Formula.racks.reject do |rack|
-          if !(HOMEBREW_REPOSITORY/"Library/LinkedKegs"/rack.basename).directory?
+          if !(HOMEBREW_LINKED_KEGS/rack.basename).directory?
             begin
               Formulary.from_rack(rack).keg_only?
             rescue FormulaUnavailableError, TapFormulaAmbiguityError, TapFormulaWithOldnameAmbiguityError
diff --git a/Library/Homebrew/extend/ARGV.rb b/Library/Homebrew/extend/ARGV.rb
index b9252c8ef..63e46a1e2 100644
--- a/Library/Homebrew/extend/ARGV.rb
+++ b/Library/Homebrew/extend/ARGV.rb
@@ -59,8 +59,8 @@ module HomebrewArgvExtension
 
       raise NoSuchKegError, rack.basename if dirs.empty?
 
-      linked_keg_ref = HOMEBREW_LIBRARY.join("LinkedKegs", rack.basename)
-      opt_prefix = HOMEBREW_PREFIX.join("opt", rack.basename)
+      linked_keg_ref = HOMEBREW_LINKED_KEGS/rack.basename
+      opt_prefix = HOMEBREW_PREFIX/"opt/#{rack.basename}"
 
       begin
         if opt_prefix.symlink? && opt_prefix.directory?
diff --git a/Library/Homebrew/formula.rb b/Library/Homebrew/formula.rb
index db59fccc9..2c24c93d7 100644
--- a/Library/Homebrew/formula.rb
+++ b/Library/Homebrew/formula.rb
@@ -429,10 +429,10 @@ class Formula
   end
 
   # @private
-  # The `LinkedKegs` directory for this {Formula}.
+  # The link status symlink directory for this {Formula}.
   # You probably want {#opt_prefix} instead.
   def linked_keg
-    Pathname.new("#{HOMEBREW_LIBRARY}/LinkedKegs/#{name}")
+    HOMEBREW_LINKED_KEGS/name
   end
 
   def latest_head_version
diff --git a/Library/Homebrew/formula_lock.rb b/Library/Homebrew/formula_lock.rb
index 25cacdb72..1ce62b328 100644
--- a/Library/Homebrew/formula_lock.rb
+++ b/Library/Homebrew/formula_lock.rb
@@ -1,16 +1,14 @@
 require "fcntl"
 
 class FormulaLock
-  LOCKDIR = HOMEBREW_LOCK_DIR
-
   def initialize(name)
     @name = name
-    @path = LOCKDIR.join("#{@name}.brewing")
+    @path = HOMEBREW_LOCK_DIR/"#{@name}.brewing"
     @lockfile = nil
   end
 
   def lock
-    LOCKDIR.mkpath
+    HOMEBREW_LOCK_DIR.mkpath
     @lockfile = get_or_create_lockfile
     unless @lockfile.flock(File::LOCK_EX | File::LOCK_NB)
       raise OperationInProgressError, @name
diff --git a/Library/Homebrew/formula_pin.rb b/Library/Homebrew/formula_pin.rb
index 0650c806f..18352c93b 100644
--- a/Library/Homebrew/formula_pin.rb
+++ b/Library/Homebrew/formula_pin.rb
@@ -1,18 +1,16 @@
 require "keg"
 
 class FormulaPin
-  PINDIR = Pathname.new("#{HOMEBREW_LIBRARY}/PinnedKegs")
-
   def initialize(f)
     @f = f
   end
 
   def path
-    Pathname.new("#{PINDIR}/#{@f.name}")
+    HOMEBREW_PINNED_KEGS/@f.name
   end
 
   def pin_at(version)
-    PINDIR.mkpath
+    HOMEBREW_PINNED_KEGS.mkpath
     version_path = @f.rack.join(version)
     path.make_relative_symlink(version_path) unless pinned? || !version_path.exist?
   end
@@ -23,7 +21,7 @@ class FormulaPin
 
   def unpin
     path.unlink if pinned?
-    PINDIR.rmdir_if_possible
+    HOMEBREW_PINNED_KEGS.rmdir_if_possible
   end
 
   def pinned?
diff --git a/Library/Homebrew/global.rb b/Library/Homebrew/global.rb
index 8472eba5c..36eb97baa 100644
--- a/Library/Homebrew/global.rb
+++ b/Library/Homebrew/global.rb
@@ -22,6 +22,9 @@ require "config"
 
 HOMEBREW_REPOSITORY.extend(GitRepositoryExtension)
 
+HOMEBREW_LINKED_KEGS = HOMEBREW_LIBRARY/"LinkedKegs"
+HOMEBREW_PINNED_KEGS = HOMEBREW_LIBRARY/"PinnedKegs"
+
 RUBY_PATH = Pathname.new(RbConfig.ruby)
 RUBY_BIN = RUBY_PATH.dirname
 
diff --git a/Library/Homebrew/keg.rb b/Library/Homebrew/keg.rb
index bc4b9ed6e..468698576 100644
--- a/Library/Homebrew/keg.rb
+++ b/Library/Homebrew/keg.rb
@@ -99,8 +99,8 @@ class Keg
     raise "#{path} is not a directory" unless path.directory?
     @path = path
     @name = path.parent.basename.to_s
-    @linked_keg_record = HOMEBREW_LIBRARY.join("LinkedKegs", name)
-    @opt_record = HOMEBREW_PREFIX.join("opt", name)
+    @linked_keg_record = HOMEBREW_LINKED_KEGS/name
+    @opt_record = HOMEBREW_PREFIX/"opt/#{name}"
   end
 
   def to_s
diff --git a/Library/Homebrew/migrator.rb b/Library/Homebrew/migrator.rb
index 5d6f5d4e6..550f8e51a 100644
--- a/Library/Homebrew/migrator.rb
+++ b/Library/Homebrew/migrator.rb
@@ -107,8 +107,8 @@ class Migrator
       @new_linked_keg_record = HOMEBREW_CELLAR/"#{newname}/#{File.basename(old_linked_keg)}"
     end
 
-    @old_pin_record = HOMEBREW_LIBRARY/"PinnedKegs"/oldname
-    @new_pin_record = HOMEBREW_LIBRARY/"PinnedKegs"/newname
+    @old_pin_record = HOMEBREW_PINNED_KEGS/oldname
+    @new_pin_record = HOMEBREW_PINNED_KEGS/newname
     @pinned = old_pin_record.symlink?
     @old_pin_link_record = old_pin_record.readlink if @pinned
   end
diff --git a/Library/Homebrew/test/test_formula.rb b/Library/Homebrew/test/test_formula.rb
index eb276073a..07244a151 100644
--- a/Library/Homebrew/test/test_formula.rb
+++ b/Library/Homebrew/test/test_formula.rb
@@ -505,7 +505,7 @@ class FormulaTests < Homebrew::TestCase
       f3.brew { f3.install }
     end
 
-    assert_equal HOMEBREW_LIBRARY.join("PinnedKegs/#{f1.name}").resolved_path, f1.prefix
+    assert_equal (HOMEBREW_PINNED_KEGS/f1.name).resolved_path, f1.prefix
 
     assert_predicate f1, :installed?
     assert_predicate f2, :installed?
diff --git a/Library/Homebrew/test/test_formula_installer.rb b/Library/Homebrew/test/test_formula_installer.rb
index 51bec7589..da0404c35 100644
--- a/Library/Homebrew/test/test_formula_installer.rb
+++ b/Library/Homebrew/test/test_formula_installer.rb
@@ -114,8 +114,8 @@ class FormulaInstallerTests < Homebrew::TestCase
     end
 
     dependency.prefix("0.1").join("bin/a").mkpath
-    HOMEBREW_LIBRARY.join("PinnedKegs").mkpath
-    FileUtils.ln_s dependency.prefix("0.1"), HOMEBREW_LIBRARY.join("PinnedKegs/#{dep_name}")
+    HOMEBREW_PINNED_KEGS.mkpath
+    FileUtils.ln_s dependency.prefix("0.1"), HOMEBREW_PINNED_KEGS/dep_name
 
     dependency_keg = Keg.new(dependency.prefix("0.1"))
     dependency_keg.link
diff --git a/Library/Homebrew/test/test_formula_lock.rb b/Library/Homebrew/test/test_formula_lock.rb
index 542f0d3f3..80ee9dd25 100644
--- a/Library/Homebrew/test/test_formula_lock.rb
+++ b/Library/Homebrew/test/test_formula_lock.rb
@@ -9,7 +9,7 @@ class FormulaLockTests < Homebrew::TestCase
 
   def teardown
     @lock.unlock
-    FormulaLock::LOCKDIR.children.each(&:unlink)
+    HOMEBREW_LOCK_DIR.children.each(&:unlink)
   end
 
   def test_locking_file_with_existing_lock_raises_error
diff --git a/Library/Homebrew/test/test_formula_pin.rb b/Library/Homebrew/test/test_formula_pin.rb
index 515acdc0a..297d7703e 100644
--- a/Library/Homebrew/test/test_formula_pin.rb
+++ b/Library/Homebrew/test/test_formula_pin.rb
@@ -8,7 +8,7 @@ class FormulaPinTests < Homebrew::TestCase
     end
 
     def rack
-      Pathname.new("#{HOMEBREW_CELLAR}/#{name}")
+      HOMEBREW_CELLAR/name
     end
 
     def installed_prefixes
@@ -31,21 +31,21 @@ class FormulaPinTests < Homebrew::TestCase
   end
 
   def test_pinnable_if_kegs_exist
-    (@f.rack+"0.1").mkpath
+    (@f.rack/"0.1").mkpath
     assert_predicate @pin, :pinnable?
   end
 
   def test_unpin
-    (@f.rack+"0.1").mkpath
+    (@f.rack/"0.1").mkpath
     @pin.pin
 
     assert_predicate @pin, :pinned?
-    assert_equal 1, FormulaPin::PINDIR.children.length
+    assert_equal 1, HOMEBREW_PINNED_KEGS.children.length
 
     @pin.unpin
 
     refute_predicate @pin, :pinned?
-    refute_predicate FormulaPin::PINDIR, :directory?
+    refute_predicate HOMEBREW_PINNED_KEGS, :directory?
   end
 
   def teardown
diff --git a/Library/Homebrew/test/test_integration_cmds.rb b/Library/Homebrew/test/test_integration_cmds.rb
index 812d26ba5..5b64dfd85 100644
--- a/Library/Homebrew/test/test_integration_cmds.rb
+++ b/Library/Homebrew/test/test_integration_cmds.rb
@@ -22,7 +22,7 @@ class IntegrationCommandTests < Homebrew::TestCase
       HOMEBREW_PREFIX/"bin",
       HOMEBREW_PREFIX/"share",
       HOMEBREW_PREFIX/"opt",
-      HOMEBREW_LIBRARY/"LinkedKegs",
+      HOMEBREW_LINKED_KEGS,
       HOMEBREW_LIBRARY/"Taps/caskroom",
       HOMEBREW_LIBRARY/"Taps/homebrew/homebrew-bundle",
       HOMEBREW_LIBRARY/"Taps/homebrew/homebrew-foo",
@@ -533,12 +533,12 @@ class IntegrationCommandTests < Homebrew::TestCase
     setup_test_formula "testball"
 
     HOMEBREW_CELLAR.join("testball/0.1").mkpath
-    HOMEBREW_LIBRARY.join("PinnedKegs").mkpath
-    FileUtils.ln_s HOMEBREW_CELLAR.join("testball/0.1"), HOMEBREW_LIBRARY.join("PinnedKegs/testball")
+    HOMEBREW_PINNED_KEGS.mkpath
+    FileUtils.ln_s HOMEBREW_CELLAR.join("testball/0.1"), HOMEBREW_PINNED_KEGS/"testball"
 
     assert_match "testball is pinned. You must unpin it to reinstall.", cmd("reinstall", "testball")
 
-    HOMEBREW_LIBRARY.join("PinnedKegs").rmtree
+    HOMEBREW_PINNED_KEGS.rmtree
   end
 
   def test_home
diff --git a/Library/Homebrew/test/test_migrator.rb b/Library/Homebrew/test/test_migrator.rb
index 9ef881f76..cefb8b7a3 100644
--- a/Library/Homebrew/test/test_migrator.rb
+++ b/Library/Homebrew/test/test_migrator.rb
@@ -60,7 +60,7 @@ class MigratorTests < Homebrew::TestCase
     @keg.link
     @keg.optlink
 
-    @old_pin = HOMEBREW_LIBRARY/"PinnedKegs/oldname"
+    @old_pin = HOMEBREW_PINNED_KEGS/"oldname"
     @old_pin.make_relative_symlink @old_keg_record
 
     @migrator = Migrator.new(@new_f)
@@ -92,7 +92,7 @@ class MigratorTests < Homebrew::TestCase
     # What to do with pin?
     @new_f.unpin
 
-    FormulaLock::LOCKDIR.children.each(&:unlink)
+    HOMEBREW_LOCK_DIR.children.each(&:unlink)
   end
 
   def test_move_cellar
@@ -117,7 +117,7 @@ class MigratorTests < Homebrew::TestCase
 
   def test_repin
     @new_keg_record.join("bin").mkpath
-    expected_relative = @new_keg_record.relative_path_from HOMEBREW_LIBRARY/"PinnedKegs"
+    expected_relative = @new_keg_record.relative_path_from HOMEBREW_PINNED_KEGS
 
     @migrator.repin
 
@@ -127,13 +127,13 @@ class MigratorTests < Homebrew::TestCase
   end
 
   def test_unlink_oldname
-    assert_equal 1, HOMEBREW_LIBRARY.join("LinkedKegs").children.size
-    assert_equal 1, HOMEBREW_PREFIX.join("opt").children.size
+    assert_equal 1, HOMEBREW_LINKED_KEGS.children.size
+    assert_equal 1, (HOMEBREW_PREFIX/"opt").children.size
 
     shutup { @migrator.unlink_oldname }
 
-    refute_predicate HOMEBREW_LIBRARY/"LinkedKegs", :exist?
-    refute_predicate HOMEBREW_LIBRARY.join("bin"), :exist?
+    refute_predicate HOMEBREW_LINKED_KEGS, :exist?
+    refute_predicate HOMEBREW_LIBRARY/"bin", :exist?
   end
 
   def test_link_newname
@@ -144,8 +144,8 @@ class MigratorTests < Homebrew::TestCase
 
     shutup { @migrator.link_newname }
 
-    assert_equal 1, HOMEBREW_LIBRARY.join("LinkedKegs").children.size
-    assert_equal 1, HOMEBREW_PREFIX.join("opt").children.size
+    assert_equal 1, HOMEBREW_LINKED_KEGS.children.size
+    assert_equal 1, (HOMEBREW_PREFIX/"opt").children.size
   end
 
   def test_link_oldname_opt
@@ -182,12 +182,12 @@ class MigratorTests < Homebrew::TestCase
 
     assert_predicate @new_keg_record, :exist?
     assert_predicate @old_keg_record.parent, :symlink?
-    refute_predicate HOMEBREW_LIBRARY/"LinkedKegs/oldname", :exist?
-    assert_equal @new_keg_record.realpath, (HOMEBREW_LIBRARY/"LinkedKegs/newname").realpath
+    refute_predicate HOMEBREW_LINKED_KEGS/"oldname", :exist?
+    assert_equal @new_keg_record.realpath, (HOMEBREW_LINKED_KEGS/"newname").realpath
     assert_equal @new_keg_record.realpath, @old_keg_record.realpath
     assert_equal @new_keg_record.realpath, (HOMEBREW_PREFIX/"opt/oldname").realpath
     assert_equal @new_keg_record.parent.realpath, (HOMEBREW_CELLAR/"oldname").realpath
-    assert_equal @new_keg_record.realpath, (HOMEBREW_LIBRARY/"PinnedKegs/newname").realpath
+    assert_equal @new_keg_record.realpath, (HOMEBREW_PINNED_KEGS/"newname").realpath
     assert_equal @new_f.path.to_s, Tab.for_keg(@new_keg_record).source["path"]
   end
 
@@ -234,9 +234,9 @@ class MigratorTests < Homebrew::TestCase
   def check_after_backup
     assert_predicate @old_keg_record.parent, :directory?
     refute_predicate @old_keg_record.parent.subdirs, :empty?
-    assert_predicate HOMEBREW_LIBRARY/"LinkedKegs/oldname", :exist?
+    assert_predicate HOMEBREW_LINKED_KEGS/"oldname", :exist?
     assert_predicate HOMEBREW_PREFIX/"opt/oldname", :exist?
-    assert_predicate HOMEBREW_LIBRARY/"PinnedKegs/oldname", :symlink?
+    assert_predicate HOMEBREW_PINNED_KEGS/"oldname", :symlink?
     assert_predicate @keg, :linked?
   end