[Toaster] [PATCH] toaster: localhostbectrl Don't descend into directories for cached_layers

[Michael Wood]

As toaster makes use of clones of itself we have a mechanism to just
clone the current checkout and use that as a basis for the git clone for
the layers inside. For instance in poky if we're running in that directory
we don't ever want to change the current checkout so we make a copy of
ourselves to do this work in. This step is cached_layers and previously
traversed through directories inside the current checkout to find any
pre-existing checkouts. This was ending up traversing too many
directories down so remove the traverse and only deal with the current
directory.

[YOCTO #8463]

Signed-off-by: Michael Wood <michael.g.wood at intel.com>
---
 .../toaster/bldcontrol/localhostbecontroller.py    | 29 ++++++++++++----------
 1 file changed, 16 insertions(+), 13 deletions(-)

diff --git a/bitbake/lib/toaster/bldcontrol/localhostbecontroller.py b/bitbake/lib/toaster/bldcontrol/localhostbecontroller.py
index 3ee68ae..b5cf559 100644
--- a/bitbake/lib/toaster/bldcontrol/localhostbecontroller.py
+++ b/bitbake/lib/toaster/bldcontrol/localhostbecontroller.py
@@ -218,23 +218,26 @@ class LocalhostBEController(BuildEnvironmentController):
         logger.debug("localhostbecontroller, our git repos are %s" % pformat(gitrepos))
 
 
-        # 2. find checked-out git repos in the sourcedir directory that may help faster cloning
+        # 2. Note for future use if the current source directory is a
+        # checked-out git repos that could match a layer's vcs_url and therefore
+        # be used to speed up cloning (rather than fetching it again).
 
         cached_layers = {}
-        for ldir in os.listdir(self.be.sourcedir):
-            fldir = os.path.join(self.be.sourcedir, ldir)
-            if os.path.isdir(fldir):
+
+        try:
+            for remotes in self._shellcmd("git remote -v", self.be.sourcedir).split("\n"):
                 try:
-                    for line in self._shellcmd("git remote -v", fldir).split("\n"):
-                        try:
-                            remote = line.split("\t")[1].split(" ")[0]
-                            if remote not in cached_layers:
-                                cached_layers[remote] = fldir
-                        except IndexError:
-                            pass
-                except ShellCmdException:
-                    # ignore any errors in collecting git remotes
+                    remote = remotes.split("\t")[1].split(" ")[0]
+                    if remote not in cached_layers:
+                        cached_layers[remote] = self.be.sourcedir
+                except IndexError:
                     pass
+        except ShellCmdException:
+            # ignore any errors in collecting git remotes this is an optional
+            # step
+            pass
+
+        logger.info("Using pre-checked out source for layer %s", cached_layers)
 
         layerlist = []
 
-- 
2.1.4