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git-svn: factor out _collapse_dotdot function

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The SVN API functions will not accept ../foo but their canonicalization
functions will not collapse it.  So we'll have to do it ourselves.

_collapse_dotdot() works better than the existing regex did.

This will be used shortly when canonicalize_path() starts using the
SVN API.

[ew: commit title]

Signed-off-by: Eric Wong <normalperson@yhbt.net>
This commit is contained in:
Michael G. Schwern
2012-07-28 02:38:28 -07:00
committed by Eric Wong
parent 82009f3048
commit 280ad88aa0
2 changed files with 36 additions and 1 deletions
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14
perl/Git/SVN/Utils.pm
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@ -72,6 +72,18 @@ API as a file path.
=cut
# Turn foo/../bar into bar
sub _collapse_dotdot {
my $path = shift;
1 while $path =~ s{/[^/]+/+\.\.}{};
1 while $path =~ s{[^/]+/+\.\./}{};
1 while $path =~ s{[^/]+/+\.\.}{};
return $path;
}
sub canonicalize_path {
my ($path) = @_;
my $dot_slash_added = 0;
@ -83,7 +95,7 @@ sub canonicalize_path {
# good reason), so let's do this manually.
$path =~ s#/+#/#g;
$path =~ s#/\.(?:/|$)#/#g;
$path =~ s#/[^/]+/\.\.##g;
$path = _collapse_dotdot($path);
$path =~ s#/$##g;
$path =~ s#^\./## if $dot_slash_added;
$path =~ s#^/##;