pactest: generate the filelist the correct way

Actually use python commands to generate the filelist instead of os.system
calls that don't necessarily work everywhere. Noticed when running "make
check" on FreeBSD where the tar program is actually bsdtar.

Signed-off-by: Dan McGee <dan@archlinux.org>

pactest/pmpkg.py

@@ -165,13 +165,23 @@ def makepkg(self, path):
 
         # .FILELIST
         if self.files:
-            os.system("tar cvf /dev/null * | sort >.FILELIST")
+            # generate a filelist
+            filelist = []
+            current = ""
+            for path, dirs, files in os.walk("."):
+                # we have to strip the './' portion from the path
+                # and add a newline to each entry.
+                current = os.path.join(path, "")[2:]
+                if len(current) != 0:
+                    filelist.append(current + "\n")
+                for file in files:
+                    # skip .PKGINFO, etc.
+                    if(not file.startswith(".")):
+                        filelist.append(os.path.join(path, file)[2:] + "\n")
+            f = open('.FILELIST', 'w')
+            f.writelines(filelist)
+            f.close()
             targets += " .FILELIST *"
-        else:
-            #prevent some pacman warnings... I expect a real package would
-            #always have at least one file...
-            os.system("touch .FILELIST")
-            targets += " .FILELIST"
 
         #safely create the dir
         mkdir(os.path.dirname(self.path))