diff options
Diffstat (limited to 'lib/File/Find.pm')
| -rw-r--r-- | lib/File/Find.pm | 170 |
1 files changed, 57 insertions, 113 deletions
diff --git a/lib/File/Find.pm b/lib/File/Find.pm index 7abebc6544..67abf6088b 100644 --- a/lib/File/Find.pm +++ b/lib/File/Find.pm @@ -1,10 +1,7 @@ package File::Find; require 5.000; require Exporter; -use Config; require Cwd; -require File::Basename; - =head1 NAME @@ -24,6 +21,17 @@ finddepth - traverse a directory structure depth-first =head1 DESCRIPTION +The first argument to find() is either a hash reference describing the +operations to be performed for each file, or a code reference. If it +is a hash reference, then the value for the key C<wanted> should be a +code reference. This code reference is called I<the wanted() +function> below. + +Currently the only other supported key for the above hash is +C<bydepth>, in presense of which the walk over directories is +performed depth-first. Entry point finddepth() is a shortcut for +specifying C<{ bydepth => 1}> in the first argument of find(). + The wanted() function does whatever verifications you want. $File::Find::dir contains the current directory name, and $_ the current filename within that directory. $File::Find::name contains @@ -34,7 +42,7 @@ prune the tree. File::Find assumes that you don't alter the $_ variable. If you do then make sure you return it to its original value before exiting your function. -This library is primarily for the C<find2perl> tool, which when fed, +This library is useful for the C<find2perl> tool, which when fed, find2perl / -name .nfs\* -mtime +7 \ -exec rm -f {} \; -o -fstype nfs -prune @@ -75,9 +83,10 @@ There is no way to make find or finddepth follow symlinks. @EXPORT = qw(find finddepth); -sub find { +sub find_opt { my $wanted = shift; - my $cwd = Cwd::cwd(); + my $bydepth = $wanted->{bydepth}; + my $cwd = $bydepth ? Cwd::fastcwd() : Cwd::cwd(); # Localize these rather than lexicalizing them for backwards # compatibility. local($topdir,$topdev,$topino,$topmode,$topnlink); @@ -87,27 +96,35 @@ sub find { || (warn("Can't stat $topdir: $!\n"), next); if (-d _) { if (chdir($topdir)) { - ($dir,$_) = ($topdir,'.'); - $name = $topdir; $prune = 0; - &$wanted; + unless ($bydepth) { + ($dir,$_) = ($topdir,'.'); + $name = $topdir; + $wanted->{wanted}->(); + } next if $prune; my $fixtopdir = $topdir; $fixtopdir =~ s,/$,, ; $fixtopdir =~ s/\.dir$// if $Is_VMS; - &finddir($wanted,$fixtopdir,$topnlink); + &finddir($wanted,$fixtopdir,$topnlink, $bydepth); + if ($bydepth) { + ($dir,$_) = ($fixtopdir,'.'); + $name = $fixtopdir; + $wanted->{wanted}->(); + } } else { warn "Can't cd to $topdir: $!\n"; } } else { + require File::Basename; unless (($_,$dir) = File::Basename::fileparse($topdir)) { ($dir,$_) = ('.', $topdir); } if (chdir($dir)) { $name = $topdir; - &$wanted; + $wanted->{wanted}->(); } else { warn "Can't cd to $dir: $!\n"; @@ -118,14 +135,14 @@ sub find { } sub finddir { - my($wanted, $nlink); + my($wanted, $nlink, $bydepth); local($dir, $name); - ($wanted, $dir, $nlink) = @_; + ($wanted, $dir, $nlink, $bydepth) = @_; my($dev, $ino, $mode, $subcount); # Get the list of files in the current directory. - opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return); + opendir(DIR,'.') || (warn("Can't open $dir: $!\n"), $bydepth || return); my(@filenames) = readdir(DIR); closedir(DIR); @@ -135,7 +152,7 @@ sub finddir { next if $_ eq '..'; $name = "$dir/$_"; $nlink = 0; - &$wanted; + $wanted->{wanted}->(); } } else { # This dir has subdirectories. @@ -143,9 +160,10 @@ sub finddir { for (@filenames) { next if $_ eq '.'; next if $_ eq '..'; - $nlink = $prune = 0; + $nlink = 0; + $prune = 0 unless $bydepth; $name = "$dir/$_"; - &$wanted; + $wanted->{wanted}->() unless $bydepth; if ($subcount > 0 || $dont_use_nlink) { # Seen all the subdirs? # Get link count and check for directoriness. @@ -161,7 +179,7 @@ sub finddir { next if $prune; if (chdir $_) { $name =~ s/\.dir$// if $Is_VMS; - &finddir($wanted,$name,$nlink); + &finddir($wanted,$name,$nlink, $bydepth); chdir '..'; } else { @@ -169,109 +187,26 @@ sub finddir { } } } + $wanted->{wanted}->() if $bydepth; } } } - -sub finddepth { - my $wanted = shift; - my $cwd = Cwd::cwd(); - # Localize these rather than lexicalizing them for backwards - # compatibility. - local($topdir,$topdev,$topino,$topmode,$topnlink); - foreach $topdir (@_) { - (($topdev,$topino,$topmode,$topnlink) = - ($Is_VMS ? stat($topdir) : lstat($topdir))) - || (warn("Can't stat $topdir: $!\n"), next); - if (-d _) { - if (chdir($topdir)) { - my $fixtopdir = $topdir; - $fixtopdir =~ s,/$,, ; - $fixtopdir =~ s/\.dir$// if $Is_VMS; - &finddepthdir($wanted,$fixtopdir,$topnlink); - ($dir,$_) = ($topdir,'.'); - $name = $topdir; - &$wanted; - } - else { - warn "Can't cd to $topdir: $!\n"; - } - } - else { - unless (($_,$dir) = File::Basename::fileparse($topdir)) { - ($dir,$_) = ('.', $topdir); - } - if (chdir($dir)) { - $name = $topdir; - &$wanted; - } - else { - warn "Can't cd to $dir: $!\n"; - } - } - chdir $cwd; - } +sub wrap_wanted { + my $wanted = shift; + defined &$wanted ? {wanted => $wanted} : $wanted; } -sub finddepthdir { - my($wanted, $nlink); - local($dir, $name); - ($wanted, $dir, $nlink) = @_; - my($dev, $ino, $mode, $subcount); - - # Get the list of files in the current directory. - opendir(DIR,'.') || (warn "Can't open $dir: $!\n", return); - my(@filenames) = readdir(DIR); - closedir(DIR); - - if ($nlink == 2 && !$dont_use_nlink) { # This dir has no subdirectories. - for (@filenames) { - next if $_ eq '.'; - next if $_ eq '..'; - $name = "$dir/$_"; - $nlink = 0; - &$wanted; - } - } - else { # This dir has subdirectories. - $subcount = $nlink - 2; - for (@filenames) { - next if $_ eq '.'; - next if $_ eq '..'; - $nlink = 0; - $name = "$dir/$_"; - if ($subcount > 0 || $dont_use_nlink) { # Seen all the subdirs? - - # Get link count and check for directoriness. - - ($dev,$ino,$mode,$nlink) = ($Is_VMS ? stat($_) : lstat($_)); - - if (-d _) { - - # It really is a directory, so do it recursively. - - --$subcount; - if (chdir $_) { - $name =~ s/\.dir$// if $Is_VMS; - &finddepthdir($wanted,$name,$nlink); - chdir '..'; - } - else { - warn "Can't cd to $_: $!\n"; - } - } - } - &$wanted; - } - } +sub find { + my $wanted = shift; + find_opt(wrap_wanted($wanted), @_); } -# Set dont_use_nlink in your hint file if your system's stat doesn't -# report the number of links in a directory as an indication -# of the number of files. -# See, e.g. hints/machten.sh for MachTen 2.2. -$dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); +sub find_depth { + my $wanted = wrap_wanted(shift); + $wanted->{bydepth} = 1; + find_opt($wanted, @_); +} # These are hard-coded for now, but may move to hint files. if ($^O eq 'VMS') { @@ -282,5 +217,14 @@ if ($^O eq 'VMS') { $dont_use_nlink = 1 if $^O eq 'os2' || $^O eq 'dos' || $^O eq 'amigaos' || $^O eq 'MSWin32'; +# Set dont_use_nlink in your hint file if your system's stat doesn't +# report the number of links in a directory as an indication +# of the number of files. +# See, e.g. hints/machten.sh for MachTen 2.2. +unless ($dont_use_nlink) { + require Config; + $dont_use_nlink = 1 if ($Config::Config{'dont_use_nlink'}); +} + 1; |