buildman: Add an option to just create the config

Normally buildman does a full build of a board. This includes creating the
u-boot.cfg file which contains all the configuration options. Buildman uses
this file with the -K option, to show differences in effective configuration
for each commit.

Doing a full build of U-Boot just to create the u-boot.cfg file is wasteful.
Add a -D option which causes buildman to only create the configuration. This
is enough to support use of -K and can be done much more quickly (typically
5-10 times faster).

Signed-off-by: Simon Glass <sjg@chromium.org>

1 files changed, 9 insertions, 5 deletions

diff --git a/tools/buildman/builderthread.py b/tools/buildman/builderthread.py
index 8974351225..926f267e21 100644
--- a/tools/buildman/builderthread.py
+++ b/tools/buildman/builderthread.py
@@ -110,8 +110,8 @@ class BuilderThread(threading.Thread):
         return self.builder.do_make(commit, brd, stage, cwd, *args,
                 **kwargs)
 
-    def RunCommit(self, commit_upto, brd, work_dir, do_config, force_build,
-                  force_build_failures):
+    def RunCommit(self, commit_upto, brd, work_dir, do_config, do_build,
+                  force_build, force_build_failures):
         """Build a particular commit.
 
         If the build is already done, and we are not forcing a build, we skip
@@ -122,6 +122,7 @@ class BuilderThread(threading.Thread):
             brd: Board object to build
             work_dir: Directory to which the source will be checked out
             do_config: True to run a make <board>_defconfig on the source
+            do_build: Try to build the source
             force_build: Force a build even if one was previously done
             force_build_failures: Force a bulid if the previous result showed
                 failure
@@ -231,6 +232,8 @@ class BuilderThread(threading.Thread):
                     config_out += result.combined
                     do_config = False   # No need to configure next time
                 if result.return_code == 0:
+                    if not do_build:
+                        args.append('cfg')
                     result = self.Make(commit, brd, 'build', cwd, *args,
                             env=env)
                 result.stderr = result.stderr.replace(src_dir + '/', '')
@@ -401,7 +404,7 @@ class BuilderThread(threading.Thread):
             force_build = False
             for commit_upto in range(0, len(job.commits), job.step):
                 result, request_config = self.RunCommit(commit_upto, brd,
-                        work_dir, do_config,
+                        work_dir, do_config, not self.builder.config_only,
                         force_build or self.builder.force_build,
                         self.builder.force_build_failures)
                 failed = result.return_code or result.stderr
@@ -411,7 +414,7 @@ class BuilderThread(threading.Thread):
                     # with a reconfig.
                     if self.builder.force_config_on_failure:
                         result, request_config = self.RunCommit(commit_upto,
-                            brd, work_dir, True, True, False)
+                            brd, work_dir, True, False, True, False)
                         did_config = True
                 if not self.builder.force_reconfig:
                     do_config = request_config
@@ -455,7 +458,8 @@ class BuilderThread(threading.Thread):
         else:
             # Just build the currently checked-out build
             result, request_config = self.RunCommit(None, brd, work_dir, True,
-                        True, self.builder.force_build_failures)
+                        not self.builder.config_only, True,
+                        self.builder.force_build_failures)
             result.commit_upto = 0
             self._WriteResult(result, job.keep_outputs)
             self.builder.out_queue.put(result)