[PATCH 4/7] cooker: add a buildFile mode that runs a single task

From: Adrian Freihofer <[email protected]>

devtool ide-sdk lets the IDE build directly (e.g. via cmake or meson,
outside of bitbake). do_install still needs bitbake: it needs pseudo,
and it usually does more than the underlying build tool's own install
step (e.g. `cmake --build --target install`) would - packaging-related
fixups the recipe or its classes add on top. It must run as only that
one already-prepared task against the source the developer just edited
- not the whole recipe: predecessors, if they ran again, would
rebuild/overwrite the very output the caller is about to inspect or has
already staged.

Add a taskonly argument to buildFileInternal(), plumbed through the
buildFile command, that also clears the intra-recipe task parents,
leaving the requested task as the runqueue's only entry. Default
unchanged, so "bitbake -b" behaviour is unaffected.

Note that for example:
- buildFileInternal() cannot do this: it drops external dependencies but
  keeps intra-recipe task ordering ('addtask X after Y'), so requesting
  do_install on an unbuilt recipe still pulls in do_fetch, do_unpack,
  do_patch, do_prepare_recipe_sysroot, do_configure and do_compile.
  That's the right default for "bitbake -b", but not here.
- --runonly can't express this either: mark_active() ignores its depth
  argument and recurses over depends, so the whole chain stays active
  regardless.

AI-Generated: Uses GitHub Copilot

Signed-off-by: Adrian Freihofer <[email protected]>
---
 lib/bb/command.py | 6 +++++-
 lib/bb/cooker.py  | 8 +++++++-
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/lib/bb/command.py b/lib/bb/command.py
index b57c5d4a3..1b16884fa 100644
--- a/lib/bb/command.py
+++ b/lib/bb/command.py
@@ -622,9 +622,13 @@ class CommandsAsync:
             internal = params[2]
         else:
             internal = False
+        if len(params) > 3:
+            taskonly = params[3]
+        else:
+            taskonly = False
 
         if internal:
-            command.cooker.buildFileInternal(bfile, task, fireevents=False, quietlog=True)
+            command.cooker.buildFileInternal(bfile, task, fireevents=False, quietlog=True, taskonly=taskonly)
         else:
             command.cooker.buildFile(bfile, task)
     buildFile.needcache = False
diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 108551a60..0321478d3 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -1368,7 +1368,7 @@ You can also remove the BB_HASHSERVE_UPSTREAM setting, but this may result in si
 
         self.buildFileInternal(buildfile, task)
 
-    def buildFileInternal(self, buildfile, task, fireevents=True, quietlog=False):
+    def buildFileInternal(self, buildfile, task, fireevents=True, quietlog=False, taskonly=False):
         """
         Build the file matching regexp buildfile
         """
@@ -1418,6 +1418,12 @@ You can also remove the BB_HASHSERVE_UPSTREAM setting, but this may result in si
         self.recipecaches[mc].rundeps[fn] = defaultdict(list)
         self.recipecaches[mc].runrecs[fn] = defaultdict(list)
 
+        if taskonly:
+            # Drop the intra-recipe task ordering too ('addtask X after Y'), so
+            # that task is the only entry left in the runqueue.
+            task_deps = self.recipecaches[mc].task_deps[fn]
+            task_deps['parents'] = {t: [] for t in task_deps['tasks']}
+
         bb.parse.siggen.setup_datacache(self.recipecaches)
 
         # Invalidate task for target if force mode active
-- 
2.55.0