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adam 2006-01-02 00:06:02 +00:00 committed by Adam Spiers
parent 5844b34608
commit 3cd2580cfe
1 changed files with 31 additions and 21 deletions
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52
Stow.pm
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@ -130,7 +130,7 @@ sub JoinPaths {
# This removes stow-controlled symlinks from $targetdir for the # This removes stow-controlled symlinks from $targetdir for the
# packages in the %$to_unstow hash, and is called recursively to # packages in the %$to_unstow hash, and is called recursively to
# process subdirectories. It returns XXX FIXME # process subdirectories.
sub Unstow { sub Unstow {
my($targetdir, $stow, $to_unstow) = @_; my($targetdir, $stow, $to_unstow) = @_;
@ -143,14 +143,16 @@ sub Unstow {
# we have to move up out of that hierarchy and back into the stow # we have to move up out of that hierarchy and back into the stow
# directory. # directory.
# Does this directory only contain symlinks to a *single* package # Does this whole subtree only contain symlinks to a *single*
# collection *other* than one we are removing? We assume so and # package collection *other* than one we are removing? We assume so
# scan the directory until we find out otherwise. We have to track # and scan the tree recursively until we find out otherwise. We
# this because if a subtree is found to be pure, we can fold it into # have to track this because if a subtree is found to be pure, we
# a single symlink. # can fold it into a single symlink.
my $pure = 1; my $pure = 1;
# FIXME what is this? # If the directory is pure, we need to know which single other
# package collection the contained symlinks point to, so we know how
# to do our tree folding.
my $othercollection = ''; my $othercollection = '';
# We assume $targetdir is empty until we find something. # We assume $targetdir is empty until we find something.
@ -226,21 +228,27 @@ sub Unstow {
$to_unstow, $to_unstow,
); );
if ($subpure) { if ($subpure) {
push(@puresubdirs, "$content/$subother"); push @puresubdirs, "$content/$subother";
} }
if ($pure) { else {
if ($subpure) { # Subtree is impure therefore this directory is impure.
if ($othercollection) { $pure = 0;
if ($subother and $othercollection ne $subother) { }
$pure = 0; if ($pure && $subpure) {
} if ($othercollection) {
} elsif ($subother) { # We already found a single other package collection
$othercollection = $subother; # somewhere in this subtree but outside $contentPath.
} if ($subother and $othercollection ne $subother) {
} else { # Two collections pointed to from within one subtree,
# Subtree is impure therefore this directory is impure. # so no tree folding will be possible.
$pure = 0; $pure = 0;
} }
} elsif ($subother) {
# This is the first other package collection we've found;
# remember it as before for future comparison with other
# symlinks.
$othercollection = $subother;
}
} }
} else { } else {
# Current directory contains something other than a symlink or a # Current directory contains something other than a symlink or a
@ -351,6 +359,8 @@ sub StowDir {
return; return;
} }
if (-d &JoinPaths($opts{stow}, $stowsubdir)) { if (-d &JoinPaths($opts{stow}, $stowsubdir)) {
# This is the splitting open of a folded tree which the stow
# manual refers to.
&DoUnlink($subdirPath); &DoUnlink($subdirPath);
&DoMkdir($subdirPath); &DoMkdir($subdirPath);
&StowContents($stowsubdir, &JoinPaths('..', $stow)); &StowContents($stowsubdir, &JoinPaths('..', $stow));