/
pathname.rb
540 lines (469 loc) 路 12.9 KB
/
pathname.rb
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require "pathname"
require "resource"
require "metafiles"
require "utils"
module DiskUsageExtension
def disk_usage
return @disk_usage if @disk_usage
compute_disk_usage
@disk_usage
end
def file_count
return @file_count if @file_count
compute_disk_usage
@file_count
end
def abv
out = ""
compute_disk_usage
out << "#{number_readable(@file_count)} files, " if @file_count > 1
out << disk_usage_readable(@disk_usage).to_s
end
private
def compute_disk_usage
path = if symlink?
resolved_path
else
self
end
if path.directory?
scanned_files = Set.new
@file_count = 0
@disk_usage = 0
path.find do |f|
if f.directory?
@disk_usage += f.lstat.size
else
@file_count += 1 if f.basename.to_s != ".DS_Store"
# use Pathname#lstat instead of Pathname#stat to get info of symlink itself.
stat = f.lstat
file_id = [stat.dev, stat.ino]
# count hardlinks only once.
unless scanned_files.include?(file_id)
@disk_usage += stat.size
scanned_files.add(file_id)
end
end
end
else
@file_count = 1
@disk_usage = path.lstat.size
end
end
end
# Homebrew extends Ruby's `Pathname` to make our code more readable.
# @see http://ruby-doc.org/stdlib-1.8.7/libdoc/pathname/rdoc/Pathname.html Ruby's Pathname API
class Pathname
include DiskUsageExtension
# @private
BOTTLE_EXTNAME_RX = /(\.[a-z0-9_]+\.bottle\.(\d+\.)?tar\.gz)$/
# Moves a file from the original location to the {Pathname}'s.
def install(*sources)
sources.each do |src|
case src
when Resource
src.stage(self)
when Resource::Partial
src.resource.stage { install(*src.files) }
when Array
if src.empty?
opoo "tried to install empty array to #{self}"
break
end
src.each { |s| install_p(s, File.basename(s)) }
when Hash
if src.empty?
opoo "tried to install empty hash to #{self}"
break
end
src.each { |s, new_basename| install_p(s, new_basename) }
else
install_p(src, File.basename(src))
end
end
end
def install_p(src, new_basename)
raise Errno::ENOENT, src.to_s unless File.symlink?(src) || File.exist?(src)
src = Pathname(src)
dst = join(new_basename)
dst = yield(src, dst) if block_given?
return unless dst
mkpath
# Use FileUtils.mv over File.rename to handle filesystem boundaries. If src
# is a symlink, and its target is moved first, FileUtils.mv will fail:
# https://bugs.ruby-lang.org/issues/7707
# In that case, use the system "mv" command.
if src.symlink?
raise unless Kernel.system "mv", src, dst
else
FileUtils.mv src, dst
end
end
private :install_p
# Creates symlinks to sources in this folder.
def install_symlink(*sources)
sources.each do |src|
case src
when Array
src.each { |s| install_symlink_p(s, File.basename(s)) }
when Hash
src.each { |s, new_basename| install_symlink_p(s, new_basename) }
else
install_symlink_p(src, File.basename(src))
end
end
end
def install_symlink_p(src, new_basename)
src = Pathname(src).expand_path(self)
dst = join(new_basename)
mkpath
FileUtils.ln_sf(src.relative_path_from(dst.parent), dst)
end
private :install_symlink_p
if method_defined?(:write)
# @private
alias old_write write
end
# we assume this pathname object is a file obviously
def write(content, *open_args)
raise "Will not overwrite #{self}" if exist?
dirname.mkpath
open("w", *open_args) { |f| f.write(content) }
end
# Only appends to a file that is already created.
def append_lines(content, *open_args)
raise "Cannot append file that doesn't exist: #{self}" unless exist?
open("a", *open_args) { |f| f.puts(content) }
end
unless method_defined?(:binwrite)
def binwrite(contents, *open_args)
open("wb", *open_args) { |f| f.write(contents) }
end
end
unless method_defined?(:binread)
def binread(*open_args)
open("rb", *open_args, &:read)
end
end
# NOTE always overwrites
def atomic_write(content)
require "tempfile"
tf = Tempfile.new(basename.to_s, dirname)
begin
tf.binmode
tf.write(content)
begin
old_stat = stat
rescue Errno::ENOENT
old_stat = default_stat
end
uid = Process.uid
gid = Process.groups.delete(old_stat.gid) { Process.gid }
begin
tf.chown(uid, gid)
tf.chmod(old_stat.mode)
rescue Errno::EPERM
end
File.rename(tf.path, self)
ensure
tf.close!
end
end
def default_stat
sentinel = parent.join(".brew.#{Process.pid}.#{rand(Time.now.to_i)}")
sentinel.open("w") {}
sentinel.stat
ensure
sentinel.unlink
end
private :default_stat
# @private
def cp_path_sub(pattern, replacement)
raise "#{self} does not exist" unless exist?
dst = sub(pattern, replacement)
raise "#{self} is the same file as #{dst}" if self == dst
if directory?
dst.mkpath
else
dst.dirname.mkpath
dst = yield(self, dst) if block_given?
FileUtils.cp(self, dst)
end
end
# @private
alias extname_old extname
# extended to support common double extensions
def extname(path = to_s)
bottle_ext = path[BOTTLE_EXTNAME_RX, 1]
return bottle_ext if bottle_ext
archive_ext = path[/(\.(tar|cpio|pax)\.(gz|bz2|lz|xz|Z))$/, 1]
return archive_ext if archive_ext
File.extname(path)
end
# for filetypes we support, basename without extension
def stem
File.basename((path = to_s), extname(path))
end
# I don't trust the children.length == 0 check particularly, not to mention
# it is slow to enumerate the whole directory just to see if it is empty,
# instead rely on good ol' libc and the filesystem
# @private
def rmdir_if_possible
rmdir
true
rescue Errno::ENOTEMPTY
if (ds_store = join(".DS_Store")).exist? && children.length == 1
ds_store.unlink
retry
else
false
end
rescue Errno::EACCES, Errno::ENOENT
false
end
# @private
def version
require "version"
Version.parse(basename)
end
# @private
def compression_type
case extname
when ".jar", ".war"
# Don't treat jars or wars as compressed
return
when ".gz"
# If the filename ends with .gz not preceded by .tar
# then we want to gunzip but not tar
return :gzip_only
when ".bz2"
return :bzip2_only
when ".lha", ".lzh"
return :lha
end
# Get enough of the file to detect common file types
# POSIX tar magic has a 257 byte offset
# magic numbers stolen from /usr/share/file/magic/
case open("rb") { |f| f.read(262) }
when /^PK\003\004/n then :zip
when /^\037\213/n then :gzip
when /^BZh/n then :bzip2
when /^\037\235/n then :compress
when /^.{257}ustar/n then :tar
when /^\xFD7zXZ\x00/n then :xz
when /^LZIP/n then :lzip
when /^Rar!/n then :rar
when /^7z\xBC\xAF\x27\x1C/n then :p7zip
when /^xar!/n then :xar
when /^\xed\xab\xee\xdb/n then :rpm
else
# This code so that bad-tarballs and zips produce good error messages
# when they don't unarchive properly.
case extname
when ".tar.gz", ".tgz", ".tar.bz2", ".tbz" then :tar
when ".zip" then :zip
end
end
end
# @private
def text_executable?
/^#!\s*\S+/ =~ open("r") { |f| f.read(1024) }
end
# @private
def incremental_hash(klass)
digest = klass.new
if digest.respond_to?(:file)
digest.file(self)
else
buf = ""
open("rb") { |f| digest << buf while f.read(16384, buf) }
end
digest.hexdigest
end
def sha256
require "digest/sha2"
incremental_hash(Digest::SHA256)
end
def verify_checksum(expected)
raise ChecksumMissingError if expected.nil? || expected.empty?
actual = Checksum.new(expected.hash_type, send(expected.hash_type).downcase)
raise ChecksumMismatchError.new(self, expected, actual) unless expected == actual
end
alias to_str to_s unless method_defined?(:to_str)
def cd
Dir.chdir(self) { yield self }
end
def subdirs
children.select(&:directory?)
end
# @private
def resolved_path
symlink? ? dirname.join(readlink) : self
end
# @private
def resolved_path_exists?
link = readlink
rescue ArgumentError
# The link target contains NUL bytes
false
else
dirname.join(link).exist?
end
# @private
def make_relative_symlink(src)
dirname.mkpath
File.symlink(src.relative_path_from(dirname), self)
end
unless method_defined?(:/)
def /(other)
if !other.respond_to?(:to_str) && !other.respond_to?(:to_path)
odeprecated "Pathname#/ with #{other.class}", "a String or a Pathname"
end
join(other.to_s)
end
end
# @private
def ensure_writable
saved_perms = nil
unless writable_real?
saved_perms = stat.mode
chmod 0644
end
yield
ensure
chmod saved_perms if saved_perms
end
# @private
def install_info
quiet_system "/usr/bin/install-info", "--quiet", to_s, "#{dirname}/dir"
end
# @private
def uninstall_info
quiet_system "/usr/bin/install-info", "--delete", "--quiet", to_s, "#{dirname}/dir"
end
# Writes an exec script in this folder for each target pathname
def write_exec_script(*targets)
targets.flatten!
if targets.empty?
opoo "tried to write exec scripts to #{self} for an empty list of targets"
return
end
mkpath
targets.each do |target|
target = Pathname.new(target) # allow pathnames or strings
join(target.basename).write <<-EOS.undent
#!/bin/bash
exec "#{target}" "$@"
EOS
end
end
# Writes an exec script that sets environment variables
def write_env_script(target, env)
env_export = ""
env.each { |key, value| env_export += "#{key}=\"#{value}\" " }
dirname.mkpath
write <<-EOS.undent
#!/bin/bash
#{env_export}exec "#{target}" "$@"
EOS
end
# Writes a wrapper env script and moves all files to the dst
def env_script_all_files(dst, env)
dst.mkpath
Pathname.glob("#{self}/*") do |file|
next if file.directory?
dst.install(file)
new_file = dst.join(file.basename)
file.write_env_script(new_file, env)
end
end
# Writes an exec script that invokes a java jar
def write_jar_script(target_jar, script_name, java_opts = "")
mkpath
join(script_name).write <<-EOS.undent
#!/bin/bash
exec java #{java_opts} -jar #{target_jar} "$@"
EOS
end
def install_metafiles(from = Pathname.pwd)
Pathname(from).children.each do |p|
next if p.directory?
next unless Metafiles.copy?(p.basename.to_s)
# Some software symlinks these files (see help2man.rb)
filename = p.resolved_path
# Some software links metafiles together, so by the time we iterate to one of them
# we may have already moved it. libxml2's COPYING and Copyright are affected by this.
next unless filename.exist?
filename.chmod 0644
install(filename)
end
end
def ds_store?
basename.to_s == ".DS_Store"
end
# https://bugs.ruby-lang.org/issues/9915
if RUBY_VERSION == "2.0.0"
prepend Module.new {
def inspect
super.force_encoding(@path.encoding)
end
}
end
end
# @private
module ObserverPathnameExtension
class << self
attr_accessor :n, :d
def reset_counts!
@n = @d = 0
@put_verbose_trimmed_warning = false
end
def total
n + d
end
def counts
[n, d]
end
MAXIMUM_VERBOSE_OUTPUT = 100
def verbose?
return ARGV.verbose? unless ENV["TRAVIS"]
return false unless ARGV.verbose?
if total < MAXIMUM_VERBOSE_OUTPUT
true
else
unless @put_verbose_trimmed_warning
puts "Only the first #{MAXIMUM_VERBOSE_OUTPUT} operations were output."
@put_verbose_trimmed_warning = true
end
false
end
end
end
def unlink
super
puts "rm #{self}" if ObserverPathnameExtension.verbose?
ObserverPathnameExtension.n += 1
end
def mkpath
super
puts "mkdir -p #{self}" if ObserverPathnameExtension.verbose?
end
def rmdir
super
puts "rmdir #{self}" if ObserverPathnameExtension.verbose?
ObserverPathnameExtension.d += 1
end
def make_relative_symlink(src)
super
puts "ln -s #{src.relative_path_from(dirname)} #{basename}" if ObserverPathnameExtension.verbose?
ObserverPathnameExtension.n += 1
end
def install_info
super
puts "info #{self}" if ObserverPathnameExtension.verbose?
end
def uninstall_info
super
puts "uninfo #{self}" if ObserverPathnameExtension.verbose?
end
end