Add build_system property to config file

This allows to pre-select the build system, specifically avoiding
confusion when kas-container is accidentally not called with --isar for
an isar config. For that, build_system needs to be defined in the
lop-level config file passed to kas-container.

Theoretically, this also allows to combine layers which have both
oe-init-build-env and isar-init-build-env scripts.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

docs/format-changelog.rst

@@ -86,3 +86,11 @@ Added
   property ``refspec`` and the repository patch property ``repo``. These
   default values will be used if the appropriate properties are not defined
   for a given repository or patch.
+
+Version 10
+----------
+
+Added
+~~~~~
+
+- ``build_system`` property to pre-select OE or Isar.

docs/userguide.rst

@@ -276,6 +276,15 @@ Configuration reference
       * ``file``: string [required]
           The path to the file relative to the root of the repository.
 
+* ``build_system``: string [optional]
+    Defines the bitbake-based build system. Known build systems are
+    ``openembedded`` (or ``oe``) and ``isar``. If set, this restricts the
+    search of kas for the init script in the configured repositories to
+    ``oe-init-build-env`` or ``isar-init-build-env``, respectively. If
+    ``kas-container`` finds this property in the top-level kas configuration
+    file (includes are not evaluated), it will automatically select the
+    required container image and invocation mode.
+
 * ``defaults``: dict [optional]
     This key can be used to set default values for various properties.
     This may help you to avoid repeating the same property assignment in

kas-container

@@ -2,7 +2,7 @@
 #
 # kas - setup tool for bitbake based projects
 #
-# Copyright (c) Siemens AG, 2018-2019
+# Copyright (c) Siemens AG, 2018-2020
 #
 # Authors:
 #  Jan Kiszka <jan.kiszka@siemens.com>
@@ -64,6 +64,23 @@ trace()
 	"$@"
 }
 
+enable_isar_mode() {
+	KAS_CONTAINER_IMAGE_NAME_DEFAULT="kas-isar"
+	KAS_ISAR_ARGS="--privileged"
+
+	case "${KAS_CONTAINER_ENGINE}" in
+	docker)
+		KAS_ISAR_ARGS="${KAS_ISAR_ARGS} --cap-add=SYS_ADMIN"
+		KAS_ISAR_ARGS="${KAS_ISAR_ARGS} --cap-add=MKNOD"
+		;;
+	podman)
+		# sudo is needed for a privileged podman container
+		KAS_CONTAINER_COMMAND="sudo ${KAS_CONTAINER_COMMAND}"
+		KAS_ISAR_ARGS="${KAS_ISAR_ARGS} --pid=host"
+		;;
+	esac
+}
+
 KAS_IMAGE_VERSION_DEFAULT="2.2"
 KAS_CONTAINER_IMAGE_PATH_DEFAULT="ghcr.io/siemens/kas"
 KAS_CONTAINER_IMAGE_NAME_DEFAULT="kas"
@@ -112,21 +129,7 @@ esac
 while [ $# -gt 0 ]; do
 	case "$1" in
 	--isar)
-		KAS_CONTAINER_IMAGE_NAME_DEFAULT="kas-isar"
+		enable_isar_mode
-		KAS_ISAR_ARGS="--privileged"
-
-		case "${KAS_CONTAINER_ENGINE}" in
-		docker)
-			KAS_ISAR_ARGS="${KAS_ISAR_ARGS} --cap-add=SYS_ADMIN"
-			KAS_ISAR_ARGS="${KAS_ISAR_ARGS} --cap-add=MKNOD"
-			;;
-		podman)
-			# sudo is needed for a privileged podman container
-			KAS_CONTAINER_COMMAND="sudo ${KAS_CONTAINER_COMMAND}"
-			KAS_ISAR_ARGS="${KAS_ISAR_ARGS} --pid=host"
-			;;
-		esac
-
 		shift 1
 		;;
 	--with-loop-dev)
@@ -205,12 +208,12 @@ done
 [ -n "${KAS_CMD}" ] || usage
 
 KAS_EXTRA_BITBAKE_ARGS=0
-set_container_image_var
 
 # parse kas sub-command (build or shell) options
 while [ $# -gt 0 ] && [ $KAS_EXTRA_BITBAKE_ARGS -eq 0 ]; do
 	case "$1" in
 	-h|--help)
+		set_container_image_var
 		trace ${KAS_CONTAINER_COMMAND} run ${KAS_CONTAINER_IMAGE} ${KAS_CMD} --help
 		exit 0
 		;;
@@ -246,6 +249,13 @@ done
 
 [ -n "${KAS_FIRST_FILE}" ] || usage
 
+BUILD_SYSTEM=$(cat ${KAS_FIRST_FILE} 2>/dev/null| grep "^build_system: " | sed 's/build_system:[ ]\+//')
+if [ "${BUILD_SYSTEM}" = "isar" ]; then
+	enable_isar_mode
+fi
+
+set_container_image_var
+
 KAS_FILE_DIR="$(dirname "${KAS_FIRST_FILE}")"
 
 KAS_REPO_DIR=$(git -C "${KAS_FILE_DIR}" rev-parse --show-toplevel 2>/dev/null) \

kas/__version__.py

@@ -1,6 +1,6 @@
 # kas - setup tool for bitbake based projects
 #
-# Copyright (c) Siemens AG, 2017-2018
+# Copyright (c) Siemens AG, 2017-2020
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -23,10 +23,10 @@
     This module contains the version of kas.
 """
 __license__ = 'MIT'
-__copyright__ = 'Copyright (c) Siemens AG, 2017-2018'
+__copyright__ = 'Copyright (c) Siemens AG, 2017-2020'
 
 __version__ = '2.2'
 
 # Please update docs/format-changelog.rst when changing the file version.
-__file_version__ = 9
+__file_version__ = 10
 __compatible_file_version__ = 1

kas/config.py

@@ -1,6 +1,6 @@
 # kas - setup tool for bitbake based projects
 #
-# Copyright (c) Siemens AG, 2017-2018
+# Copyright (c) Siemens AG, 2017-2020
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -53,6 +53,12 @@ class Config:
         self.handler = IncludeHandler(self.filenames)
         self.repo_dict = self._get_repo_dict()
 
+    def get_build_system(self):
+        """
+            Returns the pre-selected build system
+        """
+        return self._config.get('build_system', '')
+
     def find_missing_repos(self):
         """
             Returns repos that are in config but not on disk

kas/configschema.py

@@ -1,6 +1,6 @@
 # kas - setup tool for bitbake based projects
 #
-# Copyright (c) Siemens AG, 2017-2018
+# Copyright (c) Siemens AG, 2017-2020
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the 'Software'), to deal
@@ -72,6 +72,10 @@ CONFIGSCHEMA = {
                 },
             },
         },
+        'build_system': {
+            'type': 'string',
+            'enum': ['openembedded', 'oe', 'isar'],
+        },
         'defaults': {
             'type': 'object',
             'additionalProperties': False,

kas/libcmds.py

@@ -1,6 +1,6 @@
 # kas - setup tool for bitbake based projects
 #
-# Copyright (c) Siemens AG, 2017-2018
+# Copyright (c) Siemens AG, 2017-2020
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -225,7 +225,7 @@ class SetupEnviron(Command):
         return 'setup_environ'
 
     def execute(self, ctx):
-        ctx.environ.update(get_build_environ())
+        ctx.environ.update(get_build_environ(ctx.config.get_build_system()))
 
 
 class WriteBBConfig(Command):

kas/libkas.py

@@ -1,6 +1,6 @@
 # kas - setup tool for bitbake based projects
 #
-# Copyright (c) Siemens AG, 2017-2018
+# Copyright (c) Siemens AG, 2017-2020
 #
 # Permission is hereby granted, free of charge, to any person obtaining a copy
 # of this software and associated documentation files (the "Software"), to deal
@@ -183,7 +183,7 @@ def repos_apply_patches(repos):
             sys.exit(task.result())
 
 
-def get_build_environ():
+def get_build_environ(build_system):
     """
         Creates the build environment variables.
     """
@@ -191,9 +191,15 @@ def get_build_environ():
     # creates the conf directory
 
     init_repo = None
+    if build_system in ['openembedded', 'oe']:
+        scripts = ['oe-init-build-env']
+    elif build_system == 'isar':
+        scripts = ['isar-init-build-env']
+    else:
+        scripts = ['oe-init-build-env', 'isar-init-build-env']
     permutations = \
         [(repo, script) for repo in get_context().config.get_repos()
-         for script in ['oe-init-build-env', 'isar-init-build-env']]
+         for script in scripts]
     for (repo, script) in permutations:
         if os.path.exists(repo.path + '/' + script):
             if init_repo: