Class: Tab

Inherits:
OpenStruct
  • Object
show all
Extended by:
Cachable
Defined in:
Library/Homebrew/tab.rb

Overview

Inherit from OpenStruct to gain a generic initialization method that takes a hash and creates an attribute for each key and value. `Tab.new` probably should not be called directly, instead use one of the class methods like `Tab.create`.

Constant Summary collapse

FILENAME = 
"INSTALL_RECEIPT.json".freeze

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Cachable

cache, clear_cache

Class Method Details

.create(formula, compiler, stdlib) ⇒ Object

Instantiates a Tab for a new installation of a formula.


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# File 'Library/Homebrew/tab.rb', line 18

def self.create(formula, compiler, stdlib)
  build = formula.build
  attributes = {
    "homebrew_version" => HOMEBREW_VERSION,
    "used_options" => build.used_options.as_flags,
    "unused_options" => build.unused_options.as_flags,
    "tabfile" => formula.prefix/FILENAME,
    "built_as_bottle" => build.bottle?,
    "installed_as_dependency" => false,
    "installed_on_request" => true,
    "poured_from_bottle" => false,
    "time" => Time.now.to_i,
    "source_modified_time" => formula.source_modified_time.to_i,
    "HEAD" => HOMEBREW_REPOSITORY.git_head,
    "compiler" => compiler,
    "stdlib" => stdlib,
    "aliases" => formula.aliases,
    "runtime_dependencies" => formula.runtime_dependencies.map do |dep|
      f = dep.to_formula
      { "full_name" => f.full_name, "version" => f.version.to_s }
    end,
    "source" => {
      "path" => formula.specified_path.to_s,
      "tap" => formula.tap ? formula.tap.name : nil,
      "spec" => formula.active_spec_sym.to_s,
      "versions" => {
        "stable" => formula.stable ? formula.stable.version.to_s : nil,
        "devel" => formula.devel ? formula.devel.version.to_s : nil,
        "head" => formula.head ? formula.head.version.to_s : nil,
        "version_scheme" => formula.version_scheme,
      },
    },
  }

  new(attributes)
end

.empty ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 173

def self.empty
  attributes = {
    "homebrew_version" => HOMEBREW_VERSION,
    "used_options" => [],
    "unused_options" => [],
    "built_as_bottle" => false,
    "installed_as_dependency" => false,
    "installed_on_request" => true,
    "poured_from_bottle" => false,
    "time" => nil,
    "source_modified_time" => 0,
    "HEAD" => nil,
    "stdlib" => nil,
    "compiler" => DevelopmentTools.default_compiler,
    "aliases" => [],
    "runtime_dependencies" => [],
    "source" => {
      "path" => nil,
      "tap" => nil,
      "spec" => "stable",
      "versions" => {
        "stable" => nil,
        "devel" => nil,
        "head" => nil,
        "version_scheme" => 0,
      },
    },
  }

  new(attributes)
end

.for_formula(f) ⇒ Object

Returns a Tab for an already installed formula, or a fake one if the formula is not installed.


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# File 'Library/Homebrew/tab.rb', line 130

def self.for_formula(f)
  paths = []

  if f.opt_prefix.symlink? && f.opt_prefix.directory?
    paths << f.opt_prefix.resolved_path
  end

  if f.linked_keg.symlink? && f.linked_keg.directory?
    paths << f.linked_keg.resolved_path
  end

  if (dirs = f.installed_prefixes).length == 1
    paths << dirs.first
  end

  paths << f.installed_prefix

  path = paths.map { |pn| pn/FILENAME }.find(&:file?)

  if path
    tab = from_file(path)
    used_options = remap_deprecated_options(f.deprecated_options, tab.used_options)
    tab.used_options = used_options.as_flags
  else
    # Formula is not installed. Return a fake tab.
    tab = empty
    tab.unused_options = f.options.as_flags
    tab.source = {
      "path" => f.specified_path.to_s,
      "tap" => f.tap ? f.tap.name : f.tap,
      "spec" => f.active_spec_sym.to_s,
      "versions" => {
        "stable" => f.stable ? f.stable.version.to_s : nil,
        "devel" => f.devel ? f.devel.version.to_s : nil,
        "head" => f.head ? f.head.version.to_s : nil,
        "version_scheme" => f.version_scheme,
      },
    }
  end

  tab
end

.for_keg(keg) ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 99

def self.for_keg(keg)
  path = keg/FILENAME

  tab = if path.exist?
    from_file(path)
  else
    empty
  end

  tab["tabfile"] = path
  tab
end

.for_name(name) ⇒ Object

Returns a tab for the named formula's installation, or a fake one if the formula is not installed.


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# File 'Library/Homebrew/tab.rb', line 114

def self.for_name(name)
  for_formula(Formulary.factory(name))
end

.from_file(path) ⇒ Object

Returns the Tab for an install receipt at `path`. Results are cached.


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# File 'Library/Homebrew/tab.rb', line 57

def self.from_file(path)
  cache.fetch(path) { |p| cache[p] = from_file_content(File.read(p), p) }
end

.from_file_content(content, path) ⇒ Object

Like Tab.from_file, but bypass the cache.


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# File 'Library/Homebrew/tab.rb', line 62

def self.from_file_content(content, path)
  attributes = JSON.parse(content)
  attributes["tabfile"] = path
  attributes["source_modified_time"] ||= 0
  attributes["source"] ||= {}

  tapped_from = attributes["tapped_from"]
  unless tapped_from.nil? || tapped_from == "path or URL"
    attributes["source"]["tap"] = attributes.delete("tapped_from")
  end

  if attributes["source"]["tap"] == "mxcl/master" ||
     attributes["source"]["tap"] == "Homebrew/homebrew"
    attributes["source"]["tap"] = "homebrew/core"
  end

  if attributes["source"]["spec"].nil?
    version = PkgVersion.parse path.to_s.split("/")[-2]
    if version.head?
      attributes["source"]["spec"] = "head"
    else
      attributes["source"]["spec"] = "stable"
    end
  end

  if attributes["source"]["versions"].nil?
    attributes["source"]["versions"] = {
      "stable" => nil,
      "devel" => nil,
      "head" => nil,
      "version_scheme" => 0,
    }
  end

  new(attributes)
end

.remap_deprecated_options(deprecated_options, options) ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 118

def self.remap_deprecated_options(deprecated_options, options)
  deprecated_options.each do |deprecated_option|
    option = options.find { |o| o.name == deprecated_option.old }
    next unless option
    options -= [option]
    options << Option.new(deprecated_option.current, option.description)
  end
  options
end

Instance Method Details

#bottle? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 274

def bottle?
  built_as_bottle
end

#build_bottle? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 270

def build_bottle?
  built_as_bottle && !poured_from_bottle
end

#compiler ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 249

def compiler
  super || DevelopmentTools.default_compiler
end

#cxx11? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 225

def cxx11?
  include?("c++11")
end

#cxxstdlib ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 264

def cxxstdlib
  # Older tabs won't have these values, so provide sensible defaults
  lib = stdlib.to_sym if stdlib
  CxxStdlib.create(lib, compiler.to_sym)
end

#devel? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 233

def devel?
  spec == :devel
end

#devel_version ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 300

def devel_version
  Version.create(versions["devel"]) if versions["devel"]
end

#head? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 229

def head?
  spec == :head
end

#head_version ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 304

def head_version
  Version.create(versions["head"]) if versions["head"]
end

#include?(opt) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 217

def include?(opt)
  used_options.include? opt
end

#parsed_homebrew_version ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 253

def parsed_homebrew_version
  return Version::NULL if homebrew_version.nil?
  Version.new(homebrew_version)
end

#runtime_dependencies ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 258

def runtime_dependencies
  # Homebrew versions prior to 1.1.6 generated incorrect runtime dependency
  # lists.
  super unless parsed_homebrew_version < "1.1.6"
end

#source_modified_time ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 312

def source_modified_time
  Time.at(super)
end

#spec ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 288

def spec
  source["spec"].to_sym
end

#stable? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 237

def stable?
  spec == :stable
end

#stable_version ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 296

def stable_version
  Version.create(versions["stable"]) if versions["stable"]
end

#tap ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 278

def tap
  tap_name = source["tap"]
  Tap.fetch(tap_name) if tap_name
end

#tap=(tap) ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 283

def tap=(tap)
  tap_name = tap.respond_to?(:name) ? tap.name : tap
  source["tap"] = tap_name
end

#to_json ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 316

def to_json
  attributes = {
    "homebrew_version" => homebrew_version,
    "used_options" => used_options.as_flags,
    "unused_options" => unused_options.as_flags,
    "built_as_bottle" => built_as_bottle,
    "poured_from_bottle" => poured_from_bottle,
    "installed_as_dependency" => installed_as_dependency,
    "installed_on_request" => installed_on_request,
    "changed_files" => changed_files&.map(&:to_s),
    "time" => time,
    "source_modified_time" => source_modified_time.to_i,
    "HEAD" => self.HEAD,
    "stdlib" => (stdlib.to_s if stdlib),
    "compiler" => (compiler.to_s if compiler),
    "aliases" => aliases,
    "runtime_dependencies" => runtime_dependencies,
    "source" => source,
  }

  JSON.generate(attributes)
end

#to_s ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 348

def to_s
  s = []
  if poured_from_bottle
    s << "Poured from bottle"
  else
    s << "Built from source"
  end

  s << Time.at(time).strftime("on %Y-%m-%d at %H:%M:%S") if time

  unless used_options.empty?
    s << "with:"
    s << used_options.to_a.join(" ")
  end
  s.join(" ")
end

#universal? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 221

def universal?
  include?("universal")
end

#unused_options ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 245

def unused_options
  Options.create(super)
end

#used_options ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 241

def used_options
  Options.create(super)
end

#version_scheme ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 308

def version_scheme
  versions["version_scheme"] || 0
end

#versions ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 292

def versions
  source["versions"]
end

#with?(val) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 205

def with?(val)
  option_names = val.respond_to?(:option_names) ? val.option_names : [val]

  option_names.any? do |name|
    include?("with-#{name}") || unused_options.include?("without-#{name}")
  end
end

#without?(val) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'Library/Homebrew/tab.rb', line 213

def without?(val)
  !with?(val)
end

#write ⇒ Object 


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# File 'Library/Homebrew/tab.rb', line 339

def write
  # If this is a new installation, the cache of installed formulae
  # will no longer be valid.
  Formula.clear_installed_formulae_cache unless tabfile.exist?

  self.class.cache[tabfile] = self
  tabfile.atomic_write(to_json)
end