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A faster (and more general, and better documented) replacement for mklink.sh.

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Bodo Möller 1999-04-28 22:07:28 +00:00
parent ddeee82c63
commit 065e106f25
1 changed files with 52 additions and 0 deletions
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util/mklink.pl Executable file
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#!/usr/local/bin/perl
# mklink.pl -- a faster substitute for mklink.sh.
# The first command line argument is a non-empty relative path
# specifying the "from" directory.
# Each other argument is a file name not containing / and names
# a file in the current directory.
#
# For each of these files, we create in the "from" directory a link
# of the same name pointing to the local file.
#
# We assume that the directory structure is a tree, i.e. that does not
# contain symbolic links and that the parent of / is never referenced.
# Apart from this, this script should be able to handle even the most
# pathological cases.
my $from = shift;
my @files = @ARGV;
my @from_path = split(/\//, $from);
my $pwd = `pwd`;
chop($pwd);
my @pwd_path = split(/\//, $pwd);
my @to_path = ();
foreach my $dirname (@from_path) {
# In this loop, @to_path always is a relative path from
# @pwd_path (interpreted is an absolute path) to the original pwd.
# At the end, @from_path (as a relative path from the original pwd)
# designates the same directory as the absolute path @pwd_path,
# which means that @to_path then is a path from there to the original pwd.
next if ($dirname eq "" || $dirname eq ".");
if ($dirname eq "..") {
@to_path = (pop(@pwd_path), @to_path);
} else {
@to_path = ("..", @to_path);
push(@pwd_path, $dirname);
}
}
my $to = join('/', @to_path);
foreach my $file (@files) {
# print "ln -s $to/$file $from/$file\n";
symlink("$to/$file", "$from/$file");
print $file . " => $from/$file\n";
}