Refactor recursive target logic out of default_post into function

The qmake function prepareRecursiveTarget can now be used both by the
existing logic in default_post, as well as future recursive targets that
will be needed as part of the modularization of documentation builds.

Change-Id: Ibc72c3e224cb57c9f1796de3b04fda9de663dbb4
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>

1 files changed, 26 insertions, 0 deletions

diff --git a/mkspecs/features/qt_functions.prf b/mkspecs/features/qt_functions.prf
index f614ad8f07..2d8f81bae1 100644
--- a/mkspecs/features/qt_functions.prf
+++ b/mkspecs/features/qt_functions.prf
@@ -267,3 +267,29 @@ defineTest(packagesExist) {
     return(true)
 }
 
+# Prepares target that will iterate through all subdirs (except those
+# with no_default_target or no_{name_of_target}_target. The prepared
+# target must still be manually added to QMAKE_EXTRA_TARGETS.
+defineTest(prepareRecursiveTarget) {
+    target = $$1
+    no_$${target}_target: return()
+
+    for(subdir, SUBDIRS) {
+        subdir_config = $$eval($${subdir}.CONFIG)
+        contains(subdir_config, no_default_target): next()
+        contains(subdir_config, no_$${target}_target): next()
+
+        $${target}.recurse += $$subdir
+    }
+
+    # Set up the recurse target only when there
+    # is something to recurse into.
+    isEmpty($${target}.recurse): return()
+
+    $${target}.CONFIG = recursive
+    $${target}.recurse_target = $${target}
+
+    export($${target}.recurse)
+    export($${target}.CONFIG)
+    export($${target}.recurse_target)
+}