[PATCH] devtool-source.bbclass: Only create each patch branch once

[Olof Johansson <olof.johansson@axis.com>]

For conditonally applied patches based on SRC_URI overrides, the
devtool-source class would try to create a new branch for each override
assignment as a postfunc to do_patch, but if the same override was used
multiple times, it would try to create the same branch multiple times,
causing errors like

> Exception: bb.process.ExecutionError: Execution of
\   'git checkout f0f0f0f0f0ff0f0f0f0f0f0f0f0f0f0f0ff0f0f0 -b devtool-override-foo'
\   failed with exit code 128:
> fatal: A branch named 'devtool-override-foo' already exists.

This change makes sure that the devtool-source bbclass will only create
one branch per override.

Signed-off-by: Olof Johansson <olofjn@axis.com>
---
 meta/classes/devtool-source.bbclass | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
Peter Kjellerstedt pointed out some issues with v1; this updated change is
simpler. In addition to what Richard said about it causing failures in
oe-selftest. I had a issues running oe-selftest, mostly because of the large
storage requirements of /tmp and issues with company internal git hooks.  I
think I managed to run all the tests with passing results now, but please be
vigilante of testcase failures; sorry in advance!

diff --git a/meta/classes/devtool-source.bbclass b/meta/classes/devtool-source.bbclass
index 67cd0bafb20..1372e32c9e5 100644
--- a/meta/classes/devtool-source.bbclass
+++ b/meta/classes/devtool-source.bbclass
@@ -183,14 +183,14 @@ python devtool_post_patch() {
 
     extra_overrides = d.getVar('DEVTOOL_EXTRA_OVERRIDES')
     if extra_overrides:
-        extra_override_list = extra_overrides.split(':')
+        extra_overrides = set(extra_overrides.split(':'))
         devbranch = d.getVar('DEVTOOL_DEVBRANCH')
         default_overrides = d.getVar('OVERRIDES').split(':')
         no_overrides = []
         # First, we may have some overrides that are referred to in the recipe set in
         # our configuration, so we need to make a branch that excludes those
         for override in default_overrides:
-            if override not in extra_override_list:
+            if override not in extra_overrides:
                 no_overrides.append(override)
         if default_overrides != no_overrides:
             # Some overrides are active in the current configuration, so
@@ -208,7 +208,7 @@ python devtool_post_patch() {
         else:
             bb.process.run('git checkout %s -b devtool-no-overrides' % devbranch, cwd=srcsubdir)
 
-        for override in extra_override_list:
+        for override in extra_overrides:
             localdata = bb.data.createCopy(d)
             if override in default_overrides:
                 bb.process.run('git branch devtool-override-%s %s' % (override, devbranch), cwd=srcsubdir)
-- 
2.11.0