[PATCH 3/6] sanity.bbclass: warn the user if BBPATH contains wrong entries

[Scott Garman <scott.a.garman@intel.com>]

From: Laurentiu Palcu <laurentiu.palcu@intel.com>

If BBPATH references the working directory, the user is warned and asked
to fix the problem.

[Yocto #1465]

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

Reworked commit to fix merge conflicts with denzil branch.

Signed-off-by: Scott Garman <scott.a.garman@intel.com>
---
 meta/classes/sanity.bbclass |   13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/meta/classes/sanity.bbclass b/meta/classes/sanity.bbclass
index 9755694..298372b 100644
--- a/meta/classes/sanity.bbclass
+++ b/meta/classes/sanity.bbclass
@@ -310,7 +310,18 @@ def check_sanity(sanity_data):
     if "." in data.getVar('PATH', sanity_data, True).split(":"):
         messages = messages + "PATH contains '.' which will break the build, please remove this"
 
-    if data.getVar('TARGET_ARCH', sanity_data, True) == "arm":
+    bbpaths = sanity_data.getVar('BBPATH', True).split(":")
+    if "." in bbpaths or "" in bbpaths:
+        # TODO: change the following message to fatal when all BBPATH issues
+        # are fixed
+        bb.warn("BBPATH references the current directory, either through "    \
+                "an empty entry, or a '.'.\n\t This is unsafe and means your "\
+                "layer configuration is adding empty elements to BBPATH.\n\t "\
+                "Please check your layer.conf files and other BBPATH "        \
+                "settings to remove the current working directory "           \
+                "references.");
+
+    if sanity_data.getVar('TARGET_ARCH', True) == "arm":
         # This path is no longer user-readable in modern (very recent) Linux
         try:
             if os.path.exists("/proc/sys/vm/mmap_min_addr"):
-- 
1.7.9.5