cygwinでcpanを使ってエラー

はじめに

cygwin環境下でcpanを使った際，エラーが発生しインストールができない場合がある．以下のような状況である．/cygdrive/c/program: not foundが発生してインストールができない．

cpan> install Pod::Man
Running install for module Pod::Man
Running make for R/RR/RRA/podlators-1.27.tar.gz
LWP not available
Fetching with Net::FTP:
  ftp://ftp.jaist.ac.jp/pub/lang/perl/CPAN/authors/id/R/RR/RRA/podlators-1.27.tar.gz
CPAN: Digest::MD5 loaded ok
LWP not available
Fetching with Net::FTP:
  ftp://ftp.jaist.ac.jp/pub/lang/perl/CPAN/authors/id/R/RR/RRA/CHECKSUMS
Checksum for /cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/sources/authors/id/R/RR/RRA/podlators-1.27.tar.gz ok
Scanning cache /cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/build for sizes
/cygdrive/c/program: not found ←エラー
/cygdrive/c/program: not found ←エラー
Uncompressed /cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/sources/authors/id/
R/RR/RRA/podlators-1.27.tar.gz successfully
Using Tar:/cygdrive/c/program files/cygwin/bin/tar xvf /cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/sources/authors/id/R/RR/RRA/podlators-1.27.tar:
/cygdrive/c/program: not found ←エラー
Couldn't untar /cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/sources/authors/id/R/RR/RRA/podlators-1.27.tar
        

メッセージの通り，空白を含むディレクトリが途中で切れてしまい，必要なコマンドを見つけることができないためだ．以下の手順で解消できる．

cpanの設定ファイルを確認

cpanを最初に動かした際に色々指定した内容は設定ファイルに書き込まれている．そのファイルを探す．まずcpanをシェルモードで動かし，o confと打ち込む．

$ perl -MCPAN -e shell
cpan> o conf
CPAN::Config options and /cygdrive/c/Documents and Settings/foo/My Documents/.cpan/CPAN/MyConfig.pm:
    commit             Commit changes to disk
    defaults           Reload defaults from disk
    init               Interactive setting of all options

    build_cache        10
---以下省略---
        

/cygdrive/c/Documents and Settings/foo/My Documents/.cpan/CPAN/MyConfig.pmが設定ファイルである．

設定ファイルを編集

中身を見てみよう．

# This is CPAN.pm's systemwide configuration file. This file provides
# defaults for users, and the values can be changed in a per-user
# configuration file. The user-config file is being looked for as
# ~/.cpan/CPAN/MyConfig.pm.

$CPAN::Config = {
  'build_cache' =< q[10],
  'build_dir' =< q[/cygdrive/c/Documents and Settings/foo/My Documents/.cpan/build],
  'cache_metadata' =< q[1],
  'cpan_home' =< q[/cygdrive/c/Documents and Settings/foo/My Documents/.cpan],
  'dontload_hash' =< {  },
  'ftp' =< q[/cygdrive/c/program files/cygwin/bin/ftp],
  'ftp_proxy' =< q[],
  'getcwd' =< q[cwd],
  'gzip' =< q[/cygdrive/c/program files/cygwin/bin/gzip],
  'histfile' =< q[/cygdrive/c/Documents and Settings/foo/My Documents/.cpan/histfile],
  'histsize' =< q[100],
  'http_proxy' =< q[],
  'inactivity_timeout' =< q[0],
  'index_expire' =< q[1],
  'inhibit_startup_message' =< q[0],
  'keep_source_where' =< q[/cygdrive/c/Documents and Settings/foo/My Documents/.cpan/sources],
  'lynx' =< q[],
  'make' =< q[/cygdrive/c/program files/cygwin/bin/make],
  'make_arg' =< q[],
  'make_install_arg' =< q[UNINST=1],
  'makepl_arg' =< q[],
  'ncftpget' =< q[/cygdrive/c/program files/cygwin/bin/ncftpget],
  'no_proxy' =< q[],
  'pager' =< q[/cygdrive/c/program files/cygwin/bin/less],
  'prerequisites_policy' =< q[ask],
  'proxy_user' =< q[],
  'scan_cache' =< q[atstart],
  'shell' =< q[bash],
  'tar' =< q[/cygdrive/c/program files/cygwin/bin/tar],
  'term_is_latin' =< q[1],
  'unzip' =< q[/cygdrive/c/program files/cygwin/bin/unzip],
  'urllist' =< [q[ftp://ftp.jaist.ac.jp/pub/lang/perl/CPAN/], q[ftp://ftp.kddlabs.co.jp/CPAN/], q[ftp://ftp.ring.gr.jp/pub/lang/perl/CPAN/], q[ftp://ftp.u-aizu.ac.jp/pub/CPAN], q[ftp://ftp.ayamura.org/pub/CPAN/], q[ftp://ftp.cpan.jp/CPAN/], q[ftp://ftp.dti.ad.jp/pub/lang/CPAN/]],
  'wget' =< q[/cygdrive/c/program files/cygwin/bin/wget],
};
1;
__END__
        

メッセージの通り，/cygdrive/c/program files/が問題なので，これを空白の入らないDOS形式（/cygdrive/c/progra~1/）に置換する．/cygdrive/c/Documents and Settings/foo/My Documents/も同様に置換する．

# This is CPAN.pm's systemwide configuration file. This file provides
# defaults for users, and the values can be changed in a per-user
# configuration file. The user-config file is being looked for as
# ~/.cpan/CPAN/MyConfig.pm.

$CPAN::Config = {
  'build_cache' =< q[10],
  'build_dir' =< q[/cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/build], ←書換える
  'cache_metadata' =< q[1],
  'cpan_home' =< q[/cygdrive/c/Docume~1/foo/MyDocu~1/.cpan], ←書換える
  'dontload_hash' =< {  },
  'ftp' =< q[/cygdrive/c/progra~1/cygwin/bin/ftp], ←書換える
  'ftp_proxy' =< q[],
  'getcwd' =< q[cwd],
  'gzip' =< q[/cygdrive/c/progra~1/cygwin/bin/gzip], ←書換える
  'histfile' =< q[/cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/histfile], ←書換える
  'histsize' =< q[100],
  'http_proxy' =< q[],
  'inactivity_timeout' =< q[0],
  'index_expire' =< q[1],
  'inhibit_startup_message' =< q[0],
  'keep_source_where' =< q[/cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/sources], ←書換える
  'lynx' =< q[],
  'make' =< q[/cygdrive/c/progra~1/cygwin/bin/make], ←書換える
  'make_arg' =< q[],
  'make_install_arg' =< q[UNINST=1],
  'makepl_arg' =< q[],
  'ncftpget' =< q[],
  'no_proxy' =< q[],
  'pager' =< q[/cygdrive/c/progra~1/cygwin/bin/less], ←書換える
  'prerequisites_policy' =< q[ask],
  'proxy_user' =< q[],
  'scan_cache' =< q[atstart],
  'shell' =< q[bash],
  'tar' =< q[/cygdrive/c/progra~1/cygwin/bin/tar], ←書換える
  'term_is_latin' =< q[1],
  'unzip' =< q[/cygdrive/c/progra~1/cygwin/bin/unzip], ←書換える
  'urllist' =< [q[ftp://ftp.jaist.ac.jp/pub/lang/perl/CPAN/], q[ftp://ftp.kddlabs.co.jp/CPAN/], q[ftp://ftp.ring.gr.jp/pub/lang/perl/CPAN/], q[ftp://ftp.u-aizu.ac.jp/pub/CPAN], q[ftp://ftp.ayamura.org/pub/CPAN/], q[ftp://ftp.cpan.jp/CPAN/], q[ftp://ftp.dti.ad.jp/pub/lang/CPAN/]],
  'wget' =< q[/cygdrive/c/progra~1/cygwin/bin/wget],
};
1;
__END__
        

DOS形式でなくcygwinでのディレクトリ（/binや/usr/bin）に書換えてもOKである．

# This is CPAN.pm's systemwide configuration file. This file provides
# defaults for users, and the values can be changed in a per-user
# configuration file. The user-config file is being looked for as
# ~/.cpan/CPAN/MyConfig.pm.

$CPAN::Config = {
  'build_cache' =< q[10],
  'build_dir' =< q[/cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/build], ←ここはDOS形式のまま
  'cache_metadata' =< q[1],
  'cpan_home' =< q[/cygdrive/c/Docume~1/foo/MyDocu~1/.cpan], ←ここはDOS形式のまま
  'dontload_hash' =< {  },
  'ftp' =< q[/usr/bin/ftp], ←書換える
  'ftp_proxy' =< q[],
  'getcwd' =< q[cwd],
  'gzip' =< q[/bin/gzip], ←書換える
  'histfile' =< q[/cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/histfile], ←ここはDOS形式のまま
  'histsize' =< q[100],
  'http_proxy' =< q[],
  'inactivity_timeout' =< q[0],
  'index_expire' =< q[1],
  'inhibit_startup_message' =< q[0],
  'keep_source_where' =< q[/cygdrive/c/Docume~1/foo/MyDocu~1/.cpan/sources], ←ここはDOS形式のまま
  'lynx' =< q[],
  'make' =< q[/usr/bin/make], ←書換える
  'make_arg' =< q[],
  'make_install_arg' =< q[UNINST=1],
  'makepl_arg' =< q[],
  'ncftp' =< q[],
  'ncftpget' =< q[],
  'no_proxy' =< q[],
  'pager' =< q[/bin/less], ←書換える
  'prerequisites_policy' =< q[ask],
  'scan_cache' =< q[atstart],
  'shell' =< q[],
  'tar' =< q[/bin/tar], ←書換える
  'term_is_latin' =< q[1],
  'unzip' =< q[/usr/bin/unzip], ←書換える
  'urllist' =< [q[ftp://ftp.kddlabs.co.jp/CPAN/], q[ftp://ftp.u-aizu.ac.jp/pub/CPAN], q[ftp://ftp.ring.gr.jp/pub/lang/perl/CPAN/]],
  'wget' =< q[],
};
1;
__END__