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cmake: use vendored SingleApplication submodule when available

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FetchContent_Declare unconditionally tries to clone SingleApplication
from GitHub, which breaks offline builds (e.g. Debian/Ubuntu pbuilder
with FETCHCONTENT_FULLY_DISCONNECTED=ON, Launchpad PPA builds).

If the SingleApplication submodule is already checked out in the
source tree, point FETCHCONTENT_SOURCE_DIR_SINGLEAPPLICATION at it so
FetchContent skips the network step entirely and reuses the local
copy. Falls back to the existing git clone behavior otherwise, so
this is a no-op for setups that don't vendor the submodule.
This commit is contained in:
Laurent Trinques
2026-08-15 16:17:10 +02:00
parent f0b16fe650
commit afb7442e8a
1 changed files with 8 additions and 0 deletions
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cmake/fetch_singleapplication.cmake
+8
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@@ -23,6 +23,14 @@ set(QAPPLICATION_CLASS QApplication)
Include(FetchContent)
if(EXISTS "${CMAKE_SOURCE_DIR}/SingleApplication/CMakeLists.txt")
# Submodule deja present dans l'arbre source (clone --recursive, tarball
# de distro deja peuple via "git submodule update", etc.) : on l'utilise
# tel quel, sans acces reseau. Necessaire pour les builds hors-ligne
# (pbuilder/sbuild avec FETCHCONTENT_FULLY_DISCONNECTED=ON, Launchpad PPA...).
set(FETCHCONTENT_SOURCE_DIR_SINGLEAPPLICATION "${CMAKE_SOURCE_DIR}/SingleApplication")
endif()
FetchContent_Declare(
SingleApplication
GIT_REPOSITORY https://github.com/itay-grudev/SingleApplication.git