bitbake: fetch2/local.py: Provide better debug output when fetch of a local file fails

When a fetch failure occurs for a local file, this patch ensures we print the
locations searched making it easier for the user to debug the problem.

(Bitbake rev: a461adbc5f09b41c771a7603370f6f2d1299ae8e)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/bb/fetch2/local.py

@@ -30,7 +30,8 @@ import urllib
 import bb
 import bb.utils
 from   bb import data
-from   bb.fetch2 import FetchMethod
+from   bb.fetch2 import FetchMethod, FetchError
+from   bb.fetch2 import logger
 
 class Local(FetchMethod):
     def supports(self, url, urldata, d):
@@ -41,16 +42,15 @@ class Local(FetchMethod):
 
     def urldata_init(self, ud, d):
         # We don't set localfile as for this fetcher the file is already local!
-        ud.basename = os.path.basename(urllib.unquote(ud.url.split("://")[1].split(";")[0]))
+        ud.decodedurl = urllib.unquote(ud.url.split("://")[1].split(";")[0])
+        ud.basename = os.path.basename(ud.decodedurl)
         return
 
     def localpath(self, url, urldata, d):
         """
         Return the local filename of a given url assuming a successful fetch.
         """
-        path = url.split("://")[1]
-        path = path.split(";")[0]
-        path = urllib.unquote(path)
+        path = urldata.decodedurl
         newpath = path
         if path[0] != "/":
             filespath = data.getVar('FILESPATH', d, True)
@@ -76,7 +76,20 @@ class Local(FetchMethod):
     def download(self, url, urldata, d):
         """Fetch urls (no-op for Local method)"""
         # no need to fetch local files, we'll deal with them in place.
-        return 1
+        if self.supports_checksum(urldata) and not os.path.exists(urldata.localpath):
+            locations = []
+            filespath = data.getVar('FILESPATH', d, True)
+            if filespath:
+                locations = filespath.split(":")
+            filesdir = data.getVar('FILESDIR', d, True)
+            if filesdir:
+                locations.append(filesdir)
+            locations.append(d.getVar("DL_DIR", True))
+
+            msg = "Unable to find file " + url + " anywhere. The paths that were searched were:\n    " + "\n    ".join(locations)
+            raise FetchError(msg)
+
+        return True
 
     def checkstatus(self, url, urldata, d):
         """