Module: SharedEnvExtension

Included in:
Superenv
Defined in:
Library/Homebrew/extend/ENV/shared.rb,
Library/Homebrew/extend/os/mac/extend/ENV/shared.rb,
Library/Homebrew/extend/os/linux/extend/ENV/shared.rb

Overview

Homebrew extends Ruby's ENV to make our code more readable. Implemented in SharedEnvExtension and either Superenv or Stdenv (depending on the build mode).

See Also:

Instance Method Summary collapse

Instance Method Details

#append(keys, value, separator = " ") ⇒ Object


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 63

def append(keys, value, separator = " ")
  value = value.to_s
  Array(keys).each do |key|
    old = self[key]
    if old.nil? || old.empty?
      self[key] = value
    else
      self[key] += separator + value
    end
  end
end

#append_path(key, path) ⇒ Object


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 87

def append_path(key, path)
  self[key] = PATH.new(self[key]).append(path)
end

#append_to_cccfg(value) ⇒ Object


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 59

def append_to_cccfg(value)
  append("HOMEBREW_CCCFG", value, "")
end

#append_to_cflags(newflags) ⇒ Object


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 51

def append_to_cflags(newflags)
  append(CC_FLAG_VARS, newflags)
end

#ccObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 121

def cc
  self["CC"]
end

#cflagsObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 129

def cflags
  self["CFLAGS"]
end

#compilerSymbol

Outputs the current compiler.

# Do something only for the system clang
if ENV.compiler == :clang
  # modify CFLAGS CXXFLAGS OBJCFLAGS OBJCXXFLAGS in one go:
  ENV.append_to_cflags "-I ./missing/includes"
end

Returns:


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 164

def compiler
  @compiler ||= if (cc = Homebrew.args.cc)
    warn_about_non_apple_gcc($&) if cc =~ GNU_GCC_REGEXP
    fetch_compiler(cc, "--cc")
  elsif (cc = homebrew_cc)
    warn_about_non_apple_gcc($&) if cc =~ GNU_GCC_REGEXP
    compiler = fetch_compiler(cc, "HOMEBREW_CC")

    if @formula
      compilers = [compiler] + CompilerSelector.compilers
      compiler = CompilerSelector.select_for(@formula, compilers)
    end

    compiler
  elsif @formula
    CompilerSelector.select_for(@formula)
  else
    DevelopmentTools.default_compiler
  end
end

#cppflagsObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 137

def cppflags
  self["CPPFLAGS"]
end

#cxxObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 125

def cxx
  self["CXX"]
end

#cxxflagsObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 133

def cxxflags
  self["CXXFLAGS"]
end

#fcObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 145

def fc
  self["FC"]
end

#fcflagsObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 153

def fcflags
  self["FCFLAGS"]
end

#fflagsObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 149

def fflags
  self["FFLAGS"]
end

#fortranObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 224

def fortran
  # Ignore repeated calls to this function as it will misleadingly warn about
  # building with an alternative Fortran compiler without optimization flags,
  # despite it often being the Homebrew-provided one set up in the first call.
  return if @fortran_setup_done

  @fortran_setup_done = true

  flags = []

  if fc
    ohai "Building with an alternative Fortran compiler"
    puts "This is unsupported."
    self["F77"] ||= fc
  else
    if (gfortran = which("gfortran", (HOMEBREW_PREFIX/"bin").to_s))
      ohai "Using Homebrew-provided Fortran compiler."
    elsif (gfortran = which("gfortran", PATH.new(ORIGINAL_PATHS)))
      ohai "Using a Fortran compiler found at #{gfortran}."
    end
    if gfortran
      puts "This may be changed by setting the FC environment variable."
      self["FC"] = self["F77"] = gfortran
      flags = FC_FLAG_VARS
    end
  end

  flags.each { |key| self[key] = cflags }
  set_cpu_flags(flags)
end

#ldflagsObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 141

def ldflags
  self["LDFLAGS"]
end

#ncurses_defineObject

Snow Leopard defines an NCURSES value the opposite of most distros. Currently only used by aalib in core.


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 201

def ncurses_define
  append "CPPFLAGS", "-DNCURSES_OPAQUE=0"
end

#no_weak_imports_support?Boolean

Returns:

  • (Boolean)

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# File 'Library/Homebrew/extend/os/mac/extend/ENV/shared.rb', line 4

def no_weak_imports_support?
  return false unless compiler == :clang

  return false if MacOS::Xcode.version && MacOS::Xcode.version < "8.0"
  return false if MacOS::CLT.version && MacOS::CLT.version < "8.0"

  true
end

#permit_arch_flagsObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 295

def permit_arch_flags; end

#permit_weak_importsObject

A no-op until we enable this by default again (which we may never do).


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 298

def permit_weak_imports; end

#prepend(keys, value, separator = " ") ⇒ Object


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 75

def prepend(keys, value, separator = " ")
  value = value.to_s
  Array(keys).each do |key|
    old = self[key]
    self[key] = if old.nil? || old.empty?
      value
    else
      value + separator + old
    end
  end
end

#prepend_create_path(key, path) ⇒ Object


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 104

def prepend_create_path(key, path)
  path = Pathname.new(path) unless path.is_a? Pathname
  path.mkpath
  prepend_path key, path
end

#prepend_path(key, path) ⇒ Object

Prepends a directory to PATH. Is the formula struggling to find the pkgconfig file? Point it to it. This is done automatically for keg-only formulae.

ENV.prepend_path "PKG_CONFIG_PATH", "#{Formula["glib"].opt_lib}/pkgconfig"

Prepending a system path such as /usr/bin is a no-op so that requirements don't accidentally override superenv shims or formulae's bin directories, e.g.

ENV.prepend_path "PATH", which("emacs").dirname

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# File 'Library/Homebrew/extend/ENV/shared.rb', line 98

def prepend_path(key, path)
  return if %w[/usr/bin /bin /usr/sbin /sbin].include? path.to_s

  self[key] = PATH.new(self[key]).prepend(path)
end

#remove(keys, value) ⇒ Object


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 110

def remove(keys, value)
  return if value.nil?

  Array(keys).each do |key|
    next unless self[key]

    self[key] = self[key].sub(value, "")
    delete(key) if self[key].empty?
  end
end

#remove_cc_etcObject


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 42

def remove_cc_etc
  keys = %w[CC CXX OBJC OBJCXX LD CPP CFLAGS CXXFLAGS OBJCFLAGS OBJCXXFLAGS LDFLAGS CPPFLAGS]
  removed = Hash[*keys.flat_map { |key| [key, self[key]] }]
  keys.each do |key|
    delete(key)
  end
  removed
end

#remove_from_cflags(val) ⇒ Object


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# File 'Library/Homebrew/extend/ENV/shared.rb', line 55

def remove_from_cflags(val)
  remove CC_FLAG_VARS, val
end