Use ASCII RS for separating options in DH_INTERNAL_OPTIONS.

Since now extra options via dh command line arguments are encouraged, dh will
break when a bit more complex option gets added to DH_INTERNAL_OPTIONS and it
gets misparsed by the debhelper command called from the override. E.g.
debian/rules:

| %:
| 	dh --builddirectory="build dir"
|
| override_dh_install:
| 	dh_install

Will fail with something like:

| ....
| make[1]: Entering directory `............'
| dh_install
| cp: cannot stat `debian/tmp/dir': No such file or directory
| dh_install: cp returned exit code 1
| make[1]: *** [override_dh_install] Error 1

So since DH_INTERNAL_OPTIONS is exclusively for internal use, why not to use an
old good ASCII unrepresentable control character as a separator? So I chose
ASCII 1E - RS Record Separator.

Signed-off-by: Modestas Vainius <modestas@vainius.eu>

2 files changed, 2 insertions, 2 deletions

diff --git a/Debian/Debhelper/Dh_Getopt.pm b/Debian/Debhelper/Dh_Getopt.pm
index 86f3cdba..6e5cacdd 100644
--- a/Debian/Debhelper/Dh_Getopt.pm
+++ b/Debian/Debhelper/Dh_Getopt.pm
@@ -168,7 +168,7 @@ sub parseopts {
 	# DH_INTERNAL_OPTIONS is used to pass additional options from
 	# dh through an override target to a command.
 	if (defined $ENV{DH_INTERNAL_OPTIONS}) {
-		@ARGV_extra=split_options_string($ENV{DH_INTERNAL_OPTIONS});
+		@ARGV_extra=split(/\x1e/, $ENV{DH_INTERNAL_OPTIONS});
 		getoptions(\@ARGV_extra, $options);
 
 		# Avoid forcing acting on packages specified in
diff --git a/dh b/dh
index 4ea69b25..c34a5a02 100755
--- a/dh
+++ b/dh
@@ -462,7 +462,7 @@ sub run {
 		$override_command=$command;
 		# This passes the options through to commands called
 		# inside the target.
-		$ENV{DH_INTERNAL_OPTIONS}=join(" ", @options);
+		$ENV{DH_INTERNAL_OPTIONS}=join("\x1e", @options);
 		$command="debian/rules";
 		@options="override_".$override_command;
 	}