ignore patches which already landed in upstream/mainline

[cz172638]

while playing with patch queue for kernel, i realized, that some patches already landed in mainline kernel. using 'patch -R -p1 -i patches/some.patch' i verified, that patch was completely accepted, so i commented it out. it would be nice to have option for import command to check using revert if patch is alreay in current code base

[ctmarinas]

stg push and import have a --merged option but I haven't thought of doing it for import. You could import it on a base you know it would apply and rebase it afterwards on top of mainline.

[cz172638]

i use stgit for preparation of preempt_rt patch when applying standalone preempt_rt patch for older version fails.

preempt_rt patch is in fact queue of small patches. part of that queue are few bugfixes of kernel itself, when patch lands in mainline.

to use stgit for automated builds i need two things:

• ignore patches which were already merged

• if hunk will fail with std. context of 3 lines use 1 line context (now yet figured out how pass libgit2's context_lines from flags to stgit)

[cz172638]

importing it on known base will work only with sources with history, but my workflow is with archive in which is called git init so history is very different.