dgit: Handle EXDEV when saving origs

Replace two link calls with rename_link_xf, and change the subsequent
error handling to use $@ iff appropriate.

Part of the fix to #910730.

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>

1 files changed, 6 insertions, 6 deletions

diff --git a/dgit b/dgit
index d443c34..6b961f5 100755
--- a/dgit
+++ b/dgit
@@ -2224,18 +2224,18 @@ sub generate_commits_from_dsc () {
 
 	printdebug "considering saving $f: ";
 
-	if (link $f, $upper_f) {
+	if (rename_link_xf 1, $f, $upper_f) {
 	    printdebug "linked.\n";
-	} elsif ((printdebug "($!) "),
+	} elsif ((printdebug "($@) "),
 		 $! != EEXIST) {
-	    fail f_ "saving %s: %s", "$buildproductsdir/$f", $!;
+	    fail f_ "saving %s: %s", "$buildproductsdir/$f", $@;
 	} elsif (!$refetched) {
 	    printdebug "no need.\n";
-	} elsif (link $f, "$upper_f,fetch") {
+	} elsif (rename_link_xf 1, $f, "$upper_f,fetch") {
 	    printdebug "linked (using ...,fetch).\n";
-	} elsif ((printdebug "($!) "),
+	} elsif ((printdebug "($@) "),
 		 $! != EEXIST) {
-	    fail f_ "saving %s: %s", "$buildproductsdir/$f,fetch", $!;
+	    fail f_ "saving %s: %s", "$buildproductsdir/$f,fetch", $@;
 	} else {
 	    printdebug "cannot.\n";
 	}