1 | package AutoSplit;
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2 |
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3 | use 5.006_001;
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4 | use Exporter ();
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5 | use Config qw(%Config);
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6 | use Carp qw(carp);
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7 | use File::Basename ();
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8 | use File::Path qw(mkpath);
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9 | use File::Spec::Functions qw(curdir catfile catdir);
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10 | use strict;
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11 | our($VERSION, @ISA, @EXPORT, @EXPORT_OK, $Verbose, $Keep, $Maxlen,
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12 | $CheckForAutoloader, $CheckModTime);
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13 |
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14 | $VERSION = "1.04";
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15 | @ISA = qw(Exporter);
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16 | @EXPORT = qw(&autosplit &autosplit_lib_modules);
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17 | @EXPORT_OK = qw($Verbose $Keep $Maxlen $CheckForAutoloader $CheckModTime);
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18 |
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19 | =head1 NAME
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20 |
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21 | AutoSplit - split a package for autoloading
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22 |
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23 | =head1 SYNOPSIS
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24 |
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25 | autosplit($file, $dir, $keep, $check, $modtime);
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26 |
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27 | autosplit_lib_modules(@modules);
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28 |
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29 | =head1 DESCRIPTION
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30 |
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31 | This function will split up your program into files that the AutoLoader
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32 | module can handle. It is used by both the standard perl libraries and by
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33 | the MakeMaker utility, to automatically configure libraries for autoloading.
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34 |
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35 | The C<autosplit> interface splits the specified file into a hierarchy
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36 | rooted at the directory C<$dir>. It creates directories as needed to reflect
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37 | class hierarchy, and creates the file F<autosplit.ix>. This file acts as
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38 | both forward declaration of all package routines, and as timestamp for the
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39 | last update of the hierarchy.
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40 |
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41 | The remaining three arguments to C<autosplit> govern other options to
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42 | the autosplitter.
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43 |
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44 | =over 2
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45 |
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46 | =item $keep
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47 |
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48 | If the third argument, I<$keep>, is false, then any
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49 | pre-existing C<*.al> files in the autoload directory are removed if
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50 | they are no longer part of the module (obsoleted functions).
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51 | $keep defaults to 0.
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52 |
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53 | =item $check
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54 |
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55 | The
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56 | fourth argument, I<$check>, instructs C<autosplit> to check the module
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57 | currently being split to ensure that it includes a C<use>
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58 | specification for the AutoLoader module, and skips the module if
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59 | AutoLoader is not detected.
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60 | $check defaults to 1.
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61 |
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62 | =item $modtime
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63 |
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64 | Lastly, the I<$modtime> argument specifies
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65 | that C<autosplit> is to check the modification time of the module
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66 | against that of the C<autosplit.ix> file, and only split the module if
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67 | it is newer.
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68 | $modtime defaults to 1.
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69 |
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70 | =back
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71 |
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72 | Typical use of AutoSplit in the perl MakeMaker utility is via the command-line
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73 | with:
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74 |
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75 | perl -e 'use AutoSplit; autosplit($ARGV[0], $ARGV[1], 0, 1, 1)'
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76 |
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77 | Defined as a Make macro, it is invoked with file and directory arguments;
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78 | C<autosplit> will split the specified file into the specified directory and
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79 | delete obsolete C<.al> files, after checking first that the module does use
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80 | the AutoLoader, and ensuring that the module is not already currently split
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81 | in its current form (the modtime test).
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82 |
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83 | The C<autosplit_lib_modules> form is used in the building of perl. It takes
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84 | as input a list of files (modules) that are assumed to reside in a directory
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85 | B<lib> relative to the current directory. Each file is sent to the
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86 | autosplitter one at a time, to be split into the directory B<lib/auto>.
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87 |
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88 | In both usages of the autosplitter, only subroutines defined following the
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89 | perl I<__END__> token are split out into separate files. Some
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90 | routines may be placed prior to this marker to force their immediate loading
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91 | and parsing.
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92 |
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93 | =head2 Multiple packages
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94 |
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95 | As of version 1.01 of the AutoSplit module it is possible to have
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96 | multiple packages within a single file. Both of the following cases
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97 | are supported:
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98 |
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99 | package NAME;
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100 | __END__
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101 | sub AAA { ... }
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102 | package NAME::option1;
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103 | sub BBB { ... }
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104 | package NAME::option2;
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105 | sub BBB { ... }
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106 |
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107 | package NAME;
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108 | __END__
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109 | sub AAA { ... }
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110 | sub NAME::option1::BBB { ... }
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111 | sub NAME::option2::BBB { ... }
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112 |
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113 | =head1 DIAGNOSTICS
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114 |
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115 | C<AutoSplit> will inform the user if it is necessary to create the
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116 | top-level directory specified in the invocation. It is preferred that
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117 | the script or installation process that invokes C<AutoSplit> have
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118 | created the full directory path ahead of time. This warning may
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119 | indicate that the module is being split into an incorrect path.
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120 |
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121 | C<AutoSplit> will warn the user of all subroutines whose name causes
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122 | potential file naming conflicts on machines with drastically limited
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123 | (8 characters or less) file name length. Since the subroutine name is
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124 | used as the file name, these warnings can aid in portability to such
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125 | systems.
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126 |
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127 | Warnings are issued and the file skipped if C<AutoSplit> cannot locate
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128 | either the I<__END__> marker or a "package Name;"-style specification.
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129 |
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130 | C<AutoSplit> will also emit general diagnostics for inability to
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131 | create directories or files.
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132 |
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133 | =cut
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134 |
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135 | # for portability warn about names longer than $maxlen
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136 | $Maxlen = 8; # 8 for dos, 11 (14-".al") for SYSVR3
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137 | $Verbose = 1; # 0=none, 1=minimal, 2=list .al files
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138 | $Keep = 0;
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139 | $CheckForAutoloader = 1;
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140 | $CheckModTime = 1;
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141 |
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142 | my $IndexFile = "autosplit.ix"; # file also serves as timestamp
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143 | my $maxflen = 255;
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144 | $maxflen = 14 if $Config{'d_flexfnam'} ne 'define';
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145 | if (defined (&Dos::UseLFN)) {
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146 | $maxflen = Dos::UseLFN() ? 255 : 11;
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147 | }
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148 | my $Is_VMS = ($^O eq 'VMS');
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149 |
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150 | # allow checking for valid ': attrlist' attachments
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151 | # (we use 'our' rather than 'my' here, due to the rather complex and buggy
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152 | # behaviour of lexicals with qr// and (??{$lex}) )
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153 | our $nested;
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154 | $nested = qr{ \( (?: (?> [^()]+ ) | (??{ $nested }) )* \) }x;
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155 | our $one_attr = qr{ (?> (?! \d) \w+ (?:$nested)? ) (?:\s*\:\s*|\s+(?!\:)) }x;
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156 | our $attr_list = qr{ \s* : \s* (?: $one_attr )* }x;
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157 |
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158 |
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159 |
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160 | sub autosplit{
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161 | my($file, $autodir, $keep, $ckal, $ckmt) = @_;
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162 | # $file - the perl source file to be split (after __END__)
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163 | # $autodir - the ".../auto" dir below which to write split subs
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164 | # Handle optional flags:
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165 | $keep = $Keep unless defined $keep;
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166 | $ckal = $CheckForAutoloader unless defined $ckal;
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167 | $ckmt = $CheckModTime unless defined $ckmt;
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168 | autosplit_file($file, $autodir, $keep, $ckal, $ckmt);
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169 | }
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170 |
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171 |
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172 | # This function is used during perl building/installation
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173 | # ./miniperl -e 'use AutoSplit; autosplit_lib_modules(@ARGV)' ...
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174 |
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175 | sub autosplit_lib_modules{
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176 | my(@modules) = @_; # list of Module names
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177 |
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178 | while(defined($_ = shift @modules)){
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179 | while (m#(.*?[^:])::([^:].*)#) { # in case specified as ABC::XYZ
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180 | $_ = catfile($1, $2);
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181 | }
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182 | s|\\|/|g; # bug in ksh OS/2
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183 | s#^lib/##s; # incase specified as lib/*.pm
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184 | my($lib) = catfile(curdir(), "lib");
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185 | if ($Is_VMS) { # may need to convert VMS-style filespecs
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186 | $lib =~ s#^\[\]#.\/#;
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187 | }
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188 | s#^$lib\W+##s; # incase specified as ./lib/*.pm
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189 | if ($Is_VMS && /[:>\]]/) { # may need to convert VMS-style filespecs
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190 | my ($dir,$name) = (/(.*])(.*)/s);
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191 | $dir =~ s/.*lib[\.\]]//s;
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192 | $dir =~ s#[\.\]]#/#g;
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193 | $_ = $dir . $name;
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194 | }
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195 | autosplit_file(catfile($lib, $_), catfile($lib, "auto"),
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196 | $Keep, $CheckForAutoloader, $CheckModTime);
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197 | }
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198 | 0;
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199 | }
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200 |
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201 |
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202 | # private functions
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203 |
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204 | my $self_mod_time = (stat __FILE__)[9];
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205 |
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206 | sub autosplit_file {
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207 | my($filename, $autodir, $keep, $check_for_autoloader, $check_mod_time)
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208 | = @_;
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209 | my(@outfiles);
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210 | local($_);
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211 | local($/) = "\n";
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212 |
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213 | # where to write output files
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214 | $autodir ||= catfile(curdir(), "lib", "auto");
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215 | if ($Is_VMS) {
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216 | ($autodir = VMS::Filespec::unixpath($autodir)) =~ s|/\z||;
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217 | $filename = VMS::Filespec::unixify($filename); # may have dirs
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218 | }
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219 | unless (-d $autodir){
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220 | mkpath($autodir,0,0755);
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221 | # We should never need to create the auto dir
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222 | # here. installperl (or similar) should have done
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223 | # it. Expecting it to exist is a valuable sanity check against
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224 | # autosplitting into some random directory by mistake.
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225 | print "Warning: AutoSplit had to create top-level " .
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226 | "$autodir unexpectedly.\n";
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227 | }
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228 |
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229 | # allow just a package name to be used
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230 | $filename .= ".pm" unless ($filename =~ m/\.pm\z/);
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231 |
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232 | open(my $in, "<$filename") or die "AutoSplit: Can't open $filename: $!\n";
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233 | my($pm_mod_time) = (stat($filename))[9];
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234 | my($autoloader_seen) = 0;
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235 | my($in_pod) = 0;
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236 | my($def_package,$last_package,$this_package,$fnr);
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237 | while (<$in>) {
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238 | # Skip pod text.
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239 | $fnr++;
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240 | $in_pod = 1 if /^=\w/;
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241 | $in_pod = 0 if /^=cut/;
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242 | next if ($in_pod || /^=cut/);
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243 | next if /^\s*#/;
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244 |
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245 | # record last package name seen
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246 | $def_package = $1 if (m/^\s*package\s+([\w:]+)\s*;/);
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247 | ++$autoloader_seen if m/^\s*(use|require)\s+AutoLoader\b/;
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248 | ++$autoloader_seen if m/\bISA\s*=.*\bAutoLoader\b/;
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249 | last if /^__END__/;
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250 | }
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251 | if ($check_for_autoloader && !$autoloader_seen){
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252 | print "AutoSplit skipped $filename: no AutoLoader used\n"
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253 | if ($Verbose>=2);
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254 | return 0;
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255 | }
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256 | $_ or die "Can't find __END__ in $filename\n";
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257 |
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258 | $def_package or die "Can't find 'package Name;' in $filename\n";
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259 |
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260 | my($modpname) = _modpname($def_package);
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261 |
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262 | # this _has_ to match so we have a reasonable timestamp file
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263 | die "Package $def_package ($modpname.pm) does not ".
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264 | "match filename $filename"
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265 | unless ($filename =~ m/\Q$modpname.pm\E$/ or
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266 | ($^O eq 'dos') or ($^O eq 'MSWin32') or ($^O eq 'NetWare') or
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267 | $Is_VMS && $filename =~ m/$modpname.pm/i);
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268 |
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269 | my($al_idx_file) = catfile($autodir, $modpname, $IndexFile);
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270 |
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271 | if ($check_mod_time){
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272 | my($al_ts_time) = (stat("$al_idx_file"))[9] || 1;
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273 | if ($al_ts_time >= $pm_mod_time and
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274 | $al_ts_time >= $self_mod_time){
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275 | print "AutoSplit skipped ($al_idx_file newer than $filename)\n"
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276 | if ($Verbose >= 2);
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277 | return undef; # one undef, not a list
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278 | }
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279 | }
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280 |
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281 | my($modnamedir) = catdir($autodir, $modpname);
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282 | print "AutoSplitting $filename ($modnamedir)\n"
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283 | if $Verbose;
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284 |
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285 | unless (-d $modnamedir){
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286 | mkpath($modnamedir,0,0777);
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287 | }
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288 |
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289 | # We must try to deal with some SVR3 systems with a limit of 14
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290 | # characters for file names. Sadly we *cannot* simply truncate all
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291 | # file names to 14 characters on these systems because we *must*
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292 | # create filenames which exactly match the names used by AutoLoader.pm.
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293 | # This is a problem because some systems silently truncate the file
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294 | # names while others treat long file names as an error.
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295 |
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296 | my $Is83 = $maxflen==11; # plain, case INSENSITIVE dos filenames
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297 |
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298 | my(@subnames, $subname, %proto, %package);
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299 | my @cache = ();
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300 | my $caching = 1;
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301 | $last_package = '';
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302 | my $out;
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303 | while (<$in>) {
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304 | $fnr++;
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305 | $in_pod = 1 if /^=\w/;
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306 | $in_pod = 0 if /^=cut/;
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307 | next if ($in_pod || /^=cut/);
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308 | # the following (tempting) old coding gives big troubles if a
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309 | # cut is forgotten at EOF:
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310 | # next if /^=\w/ .. /^=cut/;
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311 | if (/^package\s+([\w:]+)\s*;/) {
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312 | $this_package = $def_package = $1;
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313 | }
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314 |
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315 | if (/^sub\s+([\w:]+)(\s*(?:\(.*?\))?(?:$attr_list)?)/) {
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316 | print $out "# end of $last_package\::$subname\n1;\n"
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317 | if $last_package;
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318 | $subname = $1;
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319 | my $proto = $2 || '';
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320 | if ($subname =~ s/(.*):://){
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321 | $this_package = $1;
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322 | } else {
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323 | $this_package = $def_package;
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324 | }
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325 | my $fq_subname = "$this_package\::$subname";
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326 | $package{$fq_subname} = $this_package;
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327 | $proto{$fq_subname} = $proto;
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328 | push(@subnames, $fq_subname);
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329 | my($lname, $sname) = ($subname, substr($subname,0,$maxflen-3));
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330 | $modpname = _modpname($this_package);
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331 | my($modnamedir) = catdir($autodir, $modpname);
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332 | mkpath($modnamedir,0,0777);
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333 | my($lpath) = catfile($modnamedir, "$lname.al");
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334 | my($spath) = catfile($modnamedir, "$sname.al");
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335 | my $path;
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336 |
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337 | if (!$Is83 and open($out, ">$lpath")){
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338 | $path=$lpath;
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339 | print " writing $lpath\n" if ($Verbose>=2);
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340 | } else {
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341 | open($out, ">$spath") or die "Can't create $spath: $!\n";
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342 | $path=$spath;
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343 | print " writing $spath (with truncated name)\n"
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344 | if ($Verbose>=1);
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345 | }
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346 | push(@outfiles, $path);
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347 | my $lineno = $fnr - @cache;
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348 | print $out <<EOT;
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349 | # NOTE: Derived from $filename.
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350 | # Changes made here will be lost when autosplit is run again.
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351 | # See AutoSplit.pm.
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352 | package $this_package;
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353 |
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354 | #line $lineno "$filename (autosplit into $path)"
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355 | EOT
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356 | print $out @cache;
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357 | @cache = ();
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358 | $caching = 0;
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359 | }
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360 | if($caching) {
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361 | push(@cache, $_) if @cache || /\S/;
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362 | } else {
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363 | print $out $_;
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364 | }
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365 | if(/^\}/) {
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366 | if($caching) {
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367 | print $out @cache;
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368 | @cache = ();
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369 | }
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370 | print $out "\n";
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371 | $caching = 1;
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372 | }
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373 | $last_package = $this_package if defined $this_package;
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374 | }
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375 | if ($subname) {
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376 | print $out @cache,"1;\n# end of $last_package\::$subname\n";
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377 | close($out);
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378 | }
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379 | close($in);
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380 |
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381 | if (!$keep){ # don't keep any obsolete *.al files in the directory
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382 | my(%outfiles);
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383 | # @outfiles{@outfiles} = @outfiles;
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384 | # perl downcases all filenames on VMS (which upcases all filenames) so
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385 | # we'd better downcase the sub name list too, or subs with upper case
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386 | # letters in them will get their .al files deleted right after they're
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387 | # created. (The mixed case sub name won't match the all-lowercase
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388 | # filename, and so be cleaned up as a scrap file)
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389 | if ($Is_VMS or $Is83) {
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390 | %outfiles = map {lc($_) => lc($_) } @outfiles;
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391 | } else {
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392 | @outfiles{@outfiles} = @outfiles;
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393 | }
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394 | my(%outdirs,@outdirs);
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395 | for (@outfiles) {
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396 | $outdirs{File::Basename::dirname($_)}||=1;
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397 | }
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398 | for my $dir (keys %outdirs) {
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399 | opendir(my $outdir,$dir);
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400 | foreach (sort readdir($outdir)){
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401 | next unless /\.al\z/;
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402 | my($file) = catfile($dir, $_);
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403 | $file = lc $file if $Is83 or $Is_VMS;
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404 | next if $outfiles{$file};
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405 | print " deleting $file\n" if ($Verbose>=2);
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406 | my($deleted,$thistime); # catch all versions on VMS
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407 | do { $deleted += ($thistime = unlink $file) } while ($thistime);
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408 | carp "Unable to delete $file: $!" unless $deleted;
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409 | }
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410 | closedir($outdir);
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411 | }
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412 | }
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413 |
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414 | open(my $ts,">$al_idx_file") or
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415 | carp "AutoSplit: unable to create timestamp file ($al_idx_file): $!";
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416 | print $ts "# Index created by AutoSplit for $filename\n";
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417 | print $ts "# (file acts as timestamp)\n";
|
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418 | $last_package = '';
|
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419 | for my $fqs (@subnames) {
|
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420 | my($subname) = $fqs;
|
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421 | $subname =~ s/.*:://;
|
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422 | print $ts "package $package{$fqs};\n"
|
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423 | unless $last_package eq $package{$fqs};
|
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424 | print $ts "sub $subname $proto{$fqs};\n";
|
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425 | $last_package = $package{$fqs};
|
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426 | }
|
---|
427 | print $ts "1;\n";
|
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428 | close($ts);
|
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429 |
|
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430 | _check_unique($filename, $Maxlen, 1, @outfiles);
|
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431 |
|
---|
432 | @outfiles;
|
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433 | }
|
---|
434 |
|
---|
435 | sub _modpname ($) {
|
---|
436 | my($package) = @_;
|
---|
437 | my $modpname = $package;
|
---|
438 | if ($^O eq 'MSWin32') {
|
---|
439 | $modpname =~ s#::#\\#g;
|
---|
440 | } else {
|
---|
441 | my @modpnames = ();
|
---|
442 | while ($modpname =~ m#(.*?[^:])::([^:].*)#) {
|
---|
443 | push @modpnames, $1;
|
---|
444 | $modpname = $2;
|
---|
445 | }
|
---|
446 | $modpname = catfile(@modpnames, $modpname);
|
---|
447 | }
|
---|
448 | if ($Is_VMS) {
|
---|
449 | $modpname = VMS::Filespec::unixify($modpname); # may have dirs
|
---|
450 | }
|
---|
451 | $modpname;
|
---|
452 | }
|
---|
453 |
|
---|
454 | sub _check_unique {
|
---|
455 | my($filename, $maxlen, $warn, @outfiles) = @_;
|
---|
456 | my(%notuniq) = ();
|
---|
457 | my(%shorts) = ();
|
---|
458 | my(@toolong) = grep(
|
---|
459 | length(File::Basename::basename($_))
|
---|
460 | > $maxlen,
|
---|
461 | @outfiles
|
---|
462 | );
|
---|
463 |
|
---|
464 | foreach (@toolong){
|
---|
465 | my($dir) = File::Basename::dirname($_);
|
---|
466 | my($file) = File::Basename::basename($_);
|
---|
467 | my($trunc) = substr($file,0,$maxlen);
|
---|
468 | $notuniq{$dir}{$trunc} = 1 if $shorts{$dir}{$trunc};
|
---|
469 | $shorts{$dir}{$trunc} = $shorts{$dir}{$trunc} ?
|
---|
470 | "$shorts{$dir}{$trunc}, $file" : $file;
|
---|
471 | }
|
---|
472 | if (%notuniq && $warn){
|
---|
473 | print "$filename: some names are not unique when " .
|
---|
474 | "truncated to $maxlen characters:\n";
|
---|
475 | foreach my $dir (sort keys %notuniq){
|
---|
476 | print " directory $dir:\n";
|
---|
477 | foreach my $trunc (sort keys %{$notuniq{$dir}}) {
|
---|
478 | print " $shorts{$dir}{$trunc} truncate to $trunc\n";
|
---|
479 | }
|
---|
480 | }
|
---|
481 | }
|
---|
482 | }
|
---|
483 |
|
---|
484 | 1;
|
---|
485 | __END__
|
---|
486 |
|
---|
487 | # test functions so AutoSplit.pm can be applied to itself:
|
---|
488 | sub test1 ($) { "test 1\n"; }
|
---|
489 | sub test2 ($$) { "test 2\n"; }
|
---|
490 | sub test3 ($$$) { "test 3\n"; }
|
---|
491 | sub testtesttesttest4_1 { "test 4\n"; }
|
---|
492 | sub testtesttesttest4_2 { "duplicate test 4\n"; }
|
---|
493 | sub Just::Another::test5 { "another test 5\n"; }
|
---|
494 | sub test6 { return join ":", __FILE__,__LINE__; }
|
---|
495 | package Yet::Another::AutoSplit;
|
---|
496 | sub testtesttesttest4_1 ($) { "another test 4\n"; }
|
---|
497 | sub testtesttesttest4_2 ($$) { "another duplicate test 4\n"; }
|
---|
498 | package Yet::More::Attributes;
|
---|
499 | sub test_a1 ($) : locked :locked { 1; }
|
---|
500 | sub test_a2 : locked { 1; }
|
---|