build: export GIT_CEILING_DIRECTORIES for package builds

A package may run git as part of its build process, and if the package
source code is not from a git checkout, then git may traverse up the
directory tree to find buildroot's repository directory (.git).

For instance, Poetry Core, a Python build backend, will read the
contents of .gitignore for paths to exclude when creating a Python
package. If it finds buildroot's .gitignore file, then Poetry Core will
exclude all of the package's files[1].

This exports GIT_CEILING_DIRECTORIES for both package and host builds so
that git will not traverse beyond $(BUILD_DIR)/$(BUILD_DIR_HOST).

[1]: https://github.com/python-poetry/poetry/issues/5547

Signed-off-by: Jeffery To <jeffery.to@gmail.com>
(cherry picked from commit f597f34f3afa7bba8a2606490617688f1cea5a44)

diff --git a/include/host-build.mk b/include/host-build.mk
index 22fcc31f15c7586a52f208509a8ae2949f33b71a..dbad2824cc73cd5d43440343076cc5b6f6c976a3 100644 (file)
--- a/include/host-build.mk
+++ b/include/host-build.mk
@@ -130,6 +130,7 @@ define Host/Exports/Default
   $(1) : export STAGING_PREFIX=$$(HOST_BUILD_PREFIX)
   $(1) : export PKG_CONFIG_PATH=$$(STAGING_DIR_HOST)/lib/pkgconfig:$$(HOST_BUILD_PREFIX)/lib/pkgconfig
   $(1) : export PKG_CONFIG_LIBDIR=$$(HOST_BUILD_PREFIX)/lib/pkgconfig
+  $(1) : export GIT_CEILING_DIRECTORIES=$$(BUILD_DIR_HOST)
   $(if $(HOST_CONFIG_SITE),$(1) : export CONFIG_SITE:=$(HOST_CONFIG_SITE))
   $(if $(IS_PACKAGE_BUILD),$(1) : export PATH=$$(TARGET_PATH_PKG))
 endef

diff --git a/include/package.mk b/include/package.mk
index 368bf0d7cac1eff4b8ab33d62aa6b7f1e3c8bbc8..b0c5e8ec9134f36c2a003afe3666906a52752f4a 100644 (file)
--- a/include/package.mk
+++ b/include/package.mk
@@ -173,6 +173,7 @@ define Build/Exports/Default
   $(1) : export CONFIG_SITE:=$$(CONFIG_SITE)
   $(1) : export PKG_CONFIG_PATH:=$$(PKG_CONFIG_PATH)
   $(1) : export PKG_CONFIG_LIBDIR:=$$(PKG_CONFIG_PATH)
+  $(1) : export GIT_CEILING_DIRECTORIES:=$$(BUILD_DIR)
 endef
 Build/Exports=$(Build/Exports/Default)