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Document Migrator.

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This commit is contained in:
Markus Reiter 2020-08-17 19:45:33 +02:00
parent ceeb6e6492
commit 931e1f4ee6
1 changed files with 7 additions and 0 deletions
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Library/Homebrew/migrator.rb
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@ -4,9 +4,13 @@ require "lock_file"
require "keg" require "keg"
require "tab" require "tab"
# Helper class for migrating a formula from an old to a new name.
#
# @api private
class Migrator class Migrator
include Context include Context
# Error for when a migration is necessary.
class MigrationNeededError < RuntimeError class MigrationNeededError < RuntimeError
def initialize(formula) def initialize(formula)
super <<~EOS super <<~EOS
@ -16,18 +20,21 @@ class Migrator
end end
end end
# Error for when a formula does not replace another formula.
class MigratorNoOldnameError < RuntimeError class MigratorNoOldnameError < RuntimeError
def initialize(formula) def initialize(formula)
super "#{formula.name} doesn't replace any formula." super "#{formula.name} doesn't replace any formula."
end end
end end
# Error for when the old name's path does not exist.
class MigratorNoOldpathError < RuntimeError class MigratorNoOldpathError < RuntimeError
def initialize(formula) def initialize(formula)
super "#{HOMEBREW_CELLAR/formula.oldname} doesn't exist." super "#{HOMEBREW_CELLAR/formula.oldname} doesn't exist."
end end
end end
# Error for when a formula is migrated to a different tap without explicitly using its fully-qualified name.
class MigratorDifferentTapsError < RuntimeError class MigratorDifferentTapsError < RuntimeError
def initialize(formula, tap) def initialize(formula, tap)
msg = if tap.core_tap? msg = if tap.core_tap?