ruby-dev

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Tadayoshi Funaba wrote:
> 今更って感じかもしれないけど、require 'rubygems' しただけで、結構いろ
> いろ読んじゃいますよね。
> 
> $ ruby -r rubygems -e 'p $"'
> ["rbconfig.rb", "rubygems/rubygems_version.rb", "thread.so", "thread.rb", "rbconfig/datadir.rb", "rubygems/user_interaction.rb", "socket.so", "timeout.rb", "net/protocol.rb", "uri/common.rb", "uri/generic.rb", "uri/ftp.rb", "uri/http.rb", "uri/https.rb", "uri/ldap.rb", "uri/mailto.rb", "uri.rb", "net/http.rb", "stringio.so", "yaml/error.rb", "syck.so", "yaml/ypath.rb", "yaml/basenode.rb", "yaml/syck.rb", "yaml/tag.rb", "yaml/stream.rb", "yaml/constants.rb", "rational.so", "rational.rb", "date/format.rb", "date.rb", "yaml/rubytypes.rb", "yaml/types.rb", "yaml.rb", "zlib.so", "rubygems/remote_fetcher.rb", "forwardable.rb", "digest.so", "digest.rb", "digest/sha2.rb", "parsedate.rb", "time.rb", "rubygems/source_index.rb", "rubygems/version.rb", "rubygems/specification.rb", "openssl.so", "openssl/bn.rb", "openssl/cipher.rb", "openssl/digest.rb", "openssl/buffering.rb", "fcntl.so", "openssl/ssl.rb", "openssl/x509.rb", "openssl.rb", "rubygems/gem_openssl.rb", "rubygems/security.r
b", "rubygems/custom_require.rb", "rubygems.rb"]

ruby-coreのほうでのRubyGemsチームとの議論によれば、以下が必要になるそう
です。

     YAML/Syck, WEBrick, the digest libraries, rbconfig, rdoc, thread,
     optparse, forwardable, time, open-uri, uri, net/http, fileutils,
     zlib, stringio, socket, tempfile, pathname, test/unit

で、YAML/SyckとWEBrickへの依存は外せるかも、という話になってます。

> gem コマンドがどんな風に構成されていても気にならないのですが、利用者の
> 環境に影響を与える部分は気になりますが、こういうもんなんでしょうか。

先にrequireされると「利用者の環境に影響を与える」ということはない、とい
う前提にたっているのだと思います。で、その前提は守られるべきだとも思いま
す。なので、「こういうもん」じゃないでしょうか。

YAMLやActiveSupportみたいに各クラスにメソッドを追加するのは、ライブラリ
としては勘弁してほしい。

> たとえば、この場合、date が既に読まれていますが、別の版の date を利用
> することは可能ですか。

rubygemsを読んだ後に$LOAD_PATHを変える、そして別のものを読みたい、という
ことですよね。それは（やろうとすればなんでもできるものの）、Rubyとしては
想定外、ということになると思います。'date'というfeatureはプロセスに対し
て1つだけ。

なので、-Iで適切な場所を$LOAD_PATHに加えて、rubygemsにも「別の版」のdate
を読ませないといけない。

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[#31697] Re: [ruby-list:43970] 次の1.8.6 — Tadayoshi Funaba <tadf@...>

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