support directories in COPIES

this makes it fully consistent with INSTALLS.

note that this also removes the file name from the target path when
copying files, also for consistency.

Change-Id: I69042c9aa1e2cc81f8ff982343ba25688a04abfd
Reviewed-by: Joerg Bornemann <joerg.bornemann@theqtcompany.com>

mkspecs/features/file_copies.prf

@@ -18,10 +18,21 @@ defineReplace(qtStripProPwd) {
 for (cp, COPIES) {
     isEmpty($${cp}.files): next()
     pfx = copy_$${cp}
-    for (f, $${cp}.files): \
-        $${pfx}.files += $$absolute_path($$f, $$_PRO_FILE_PWD_)
+    notdir = false
+    dir = false
+    for (f, $${cp}.files) {
+        fil = $$absolute_path($$f, $$_PRO_FILE_PWD_)
+        tfiles = $$files($$fil/*)
+        isEmpty(tfiles): \
+            notdir = true
+        else: \
+            dir = true
+        $${pfx}.files += $$fil
+    }
+    $$dir:$$notdir: \
+        error("COPIES entry $$cp lists both files and directories.")
     path = $$eval($${cp}.path)
-    isEmpty(path): error("COPY $cp defines no .path")
+    isEmpty(path): error("COPIES entry $$cp defines no .path")
     base = $$eval($${cp}.base)
     isEmpty(base) {
         $${pfx}.output = $$path/${QMAKE_FILE_IN_NAME}
@@ -34,7 +45,12 @@ for (cp, COPIES) {
         $${pfx}.output = $$path/${QMAKE_FUNC_FILE_IN_qtStripSrcDir_$$cp}
     }
     $${pfx}.input = $${pfx}.files
-    $${pfx}.commands = $$QMAKE_COPY ${QMAKE_FILE_IN} ${QMAKE_FILE_OUT}
+    !$$dir: \
+        $${pfx}.commands = $$QMAKE_COPY ${QMAKE_FILE_IN} ${QMAKE_FILE_OUT_PATH}
+    else: !copy_dir_files: \
+        $${pfx}.commands = $$QMAKE_COPY_DIR ${QMAKE_FILE_IN} ${QMAKE_FILE_OUT_PATH}
+    else: \
+        $${pfx}.commands = $$QMAKE_COPY_DIR ${QMAKE_FILE_IN} ${QMAKE_FILE_OUT}
     $${pfx}.name = COPY ${QMAKE_FILE_IN}
     $${pfx}.CONFIG = no_link no_clean target_predeps
     QMAKE_EXTRA_COMPILERS += $${pfx}