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authorKarl Berry <karl@freefriends.org>2019-10-29 21:16:46 +0000
committerKarl Berry <karl@freefriends.org>2019-10-29 21:16:46 +0000
commit3c1bc4c2ad1fbb0fe57314a61719abfdd3bdf96a (patch)
treef55c54bc4e55530b342d2818cc7b3dd62937be0c /Master/tlpkg/TeXLive
parente4904e83d5f83b285148e6479525d3ee9cb8202a (diff)
(copy): support new -L "option" argument to
dereference source (once) if it is a symlink. (unpack): use -L to copy in the case that we are installing from local compressed files; with the advent of versioned containers, those containers may be symlinks. git-svn-id: svn://tug.org/texlive/trunk@52568 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/tlpkg/TeXLive')
-rw-r--r--Master/tlpkg/TeXLive/TLUtils.pm40
1 files changed, 32 insertions, 8 deletions
diff --git a/Master/tlpkg/TeXLive/TLUtils.pm b/Master/tlpkg/TeXLive/TLUtils.pm
index 1260fd7c506..b57dac1dc8b 100644
--- a/Master/tlpkg/TeXLive/TLUtils.pm
+++ b/Master/tlpkg/TeXLive/TLUtils.pm
@@ -1102,18 +1102,25 @@ sub rmtree {
=item C<copy("-f", $file, $destfile)>
+=item C<copy("-L", $file, $destfile)>
+
Copy file C<$file> to directory C<$target_dir>, or to the C<$destfile>
-in the second case. No external programs are involved. Since we need
-C<sysopen()>, the Perl module C<Fcntl.pm> is required. The time stamps
-are preserved and symlinks are created on Unix systems. On Windows,
-C<(-l $file)> will never return 'C<true>' and so symlinks will be
-(uselessly) copied as regular files.
+if the first argument is C<"-f">. No external programs are involved.
+Since we need C<sysopen()>, the Perl module C<Fcntl.pm> is required. The
+time stamps are preserved and symlinks are created on Unix systems. On
+Windows, C<(-l $file)> will never return 'C<true>' and so symlinks will
+be (uselessly) copied as regular files.
+
+If the argument is C<"-L"> and C<$file> is a symlink, the link is
+dereferenced before the copying is done. (If both C<"-f"> and C<"-L">
+are desired, they must be given in that order, although the current code
+has no need to do this.)
C<copy> invokes C<mkdirhier> if target directories do not exist. Files
have mode C<0777> if they are executable and C<0666> otherwise, with
the set bits in I<umask> cleared in each case.
-C<$file> can begin with a file:/ prefix.
+C<$file> can begin with a C<file:/> prefix.
If C<$file> is not readable, we return without copying anything. (This
can happen when the database and files are not in perfect sync.) On the
@@ -1125,10 +1132,15 @@ that is a fatal error.
sub copy {
my $infile = shift;
my $filemode = 0;
+ my $dereference = 0;
if ($infile eq "-f") { # second argument is a file
$filemode = 1;
$infile = shift;
}
+ if ($infile eq "-L") {
+ $dereference = 1;
+ $infile = shift;
+ }
my $destdir=shift;
# while we're trying to figure out the versioned containers.
@@ -1159,6 +1171,18 @@ sub copy {
die "mkdirhier($destdir) failed: $err\n" if ! $ret;
}
+ # if we should dereference, change $infile to refer to the link target.
+ if (-l $infile && $dereference) {
+ my $linktarget = readlink($infile);
+ # The symlink target should always be relative, and we need to
+ # prepend the directory containing the link in that case.
+ # (Although it should never happen, if the symlink target happens
+ # to already be absolute, do not prepend.)
+ if ($linktarget !~ m,^/,) {
+ $infile = Cwd::abs_path(dirname($infile)) . "/$linktarget";
+ }
+ }
+
if (-l $infile) {
my $linktarget = readlink($infile);
my $dest = "$destdir/$filename";
@@ -2265,8 +2289,8 @@ sub unpack {
}
} else {
# we are installing from local compressed files
- # copy it to temp
- TeXLive::TLUtils::copy($what, $tempdir);
+ # copy it to temp with dereferencing of link target
+ TeXLive::TLUtils::copy("-L", $what, $tempdir);
check_file_and_remove($containerfile, $checksum, $size);
if (! -r $containerfile) {