Kernel: T9181: stop re-reading data/defaults.toml during build

build-kernel.sh parsed kernel_flavor out of defaults.toml itself via a
brittle awk one-liner, even though build.py already has that value from
its own defaults.toml read.

Pass kernel_flavor down as an env var instead, so defaults.toml is read
in exactly one place (build.py's main) and everything downstream flows
through kernel-vars or explicit parameters.

Author: c-po

scripts/package-build/linux-kernel/build-kernel.sh

@@ -22,8 +22,13 @@ if [ -d /usr/lib/ccache/ ]; then
     export PATH=/usr/lib/ccache:$PATH
 fi
 
+if [ -z "${KERNEL_FLAVOR}" ]; then
+    echo "E: KERNEL_FLAVOR is not set, run via ./build.py so it can be passed from data/defaults.toml"
+    exit 1
+fi
+
 KERNEL_VERSION=$(make kernelversion)
-KERNEL_SUFFIX=-$(awk -F "= " '/kernel_flavor/ {print $2}' ../../../../data/defaults.toml | tr -d \")
+KERNEL_SUFFIX=-${KERNEL_FLAVOR}
 
 echo "I: Generate Kernel config"
 ARCH=$(dpkg --print-architecture)

scripts/package-build/linux-kernel/build.py

@@ -137,7 +137,7 @@ def build_package(package: dict, dependencies: list,
 
         # Execute the build command
         if package['build_cmd'] == 'build_kernel':
-            source_dir = build_kernel(package['kernel_version'])
+            source_dir = build_kernel(package['kernel_version'], package['kernel_flavor'])
             if linux_kernel_tarball is not None:
                 linux_kernel_tarball.clear()
                 linux_kernel_tarball['package_name'] = package['name']
@@ -191,7 +191,7 @@ def merge_dicts(defaults, package):
     return {**defaults, **package}
 
 
-def build_kernel(kernel_version) -> str:
+def build_kernel(kernel_version, kernel_flavor) -> str:
     """Build the Linux kernel"""
     source_dir = 'linux' # Git source repo name - preferred over TAR
     if not os.path.exists(source_dir):
@@ -205,7 +205,9 @@ def build_kernel(kernel_version) -> str:
         source_dir = f'linux-{kernel_version}'
         os.symlink(source_dir, 'linux')
 
-    run(['./build-kernel.sh'], check=True)
+    # kernel_flavor is only known here (merged from data/defaults.toml); pass it down
+    # via the environment so build-kernel.sh doesn't need to re-read defaults.toml itself.
+    run(['./build-kernel.sh'], check=True, env={**os.environ, 'KERNEL_FLAVOR': kernel_flavor})
     return(source_dir)