[RFC 0/3] Fix gbp patching after configuration change

[Uladzimir Bely <ubely@ilbers.de>]

Attempt to rebuild ISAR after some changes in local.conf was leading
to failure on `cowsay` package because of an attempt to apply
custom patch while it was already applied at first build.

The problem was in isar.patch format - it used `git` as PATCHTOOL
but was not in format compatible with `git am`. So the fallback way
of patching was used.

The series fixes isar.patch format, adds CI test for this condition
and adds an appropriate section to the documentation

Uladzimir Bely (3):
  meta-isar: reformat isar.patch for cowsay to properly work with git
  ci: Test for rebuild with no cleanup after configuration change
  doc: Add a section on gbp-compatible packages

 doc/user_manual.md                            | 15 +++++++++
 meta-isar/recipes-app/cowsay/files/isar.patch | 32 +++++++++++++++----
 scripts/ci_build.sh                           | 11 ++++---
 3 files changed, 47 insertions(+), 11 deletions(-)

-- 
2.20.1