How can I remove relative path components but leave symlinks alone in Perl?
- by jnylen
I need to get Perl to remove relative path components from a Linux path. I've found a couple of functions that almost do what I want, but:
File::Spec->rel2abs does too little. It does not resolve ".." into a directory properly.
Cwd::realpath does too much. It resolves all symbolic links in the path, which I do not want.
Perhaps the best way to illustrate how I want this function to behave is to post a bash log where FixPath is a hypothetical command that gives the desired output:
'/tmp/test'$ mkdir -p a/b/c1 a/b/c2
'/tmp/test'$ cd a
'/tmp/test/a'$ ln -s b link
'/tmp/test/a'$ ls
b link
'/tmp/test/a'$ cd b
'/tmp/test/a/b'$ ls
c1 c2
'/tmp/test/a/b'$ FixPath . # rel2abs works here
===> /tmp/test/a/b
'/tmp/test/a/b'$ FixPath .. # realpath works here
===> /tmp/test/a
'/tmp/test/a/b'$ FixPath c1 # rel2abs works here
===> /tmp/test/a/b/c1
'/tmp/test/a/b'$ FixPath ../b # realpath works here
===> /tmp/test/a/b
'/tmp/test/a/b'$ FixPath ../link/c1 # neither one works here
===> /tmp/test/a/link/c1
'/tmp/test/a/b'$ FixPath missing # should work for nonexistent files
===> /tmp/test/a/b/missing
