image_types_wic.bbclass has a mechanism for doing variable substitution
on .wks files by simply letting the input file be called
.wks.in. However, that doesn't allow using variables in files included
via the include directive. This is unfortunate, because lacking either
the ability to include other files or variable substitution leads to
fragile and error-prone duplication between kickstarter files and
recipes/configuration files used for various boards.
This adds (somewhat naive) support for variable substitution in all
files parsed by wic. The user should add all required variables to
WICVARS to get them exported appropriately.
Signed-off-by: Rasmus Villemoes <rasmus.villem...@prevas.dk>
---
scripts/lib/wic/ksparser.py | 17 +++++++++++++++++
1 file changed, 17 insertions(+)
diff --git a/scripts/lib/wic/ksparser.py b/scripts/lib/wic/ksparser.py
index 7e5a9c5092..08baf76123 100644
--- a/scripts/lib/wic/ksparser.py
+++ b/scripts/lib/wic/ksparser.py
@@ -28,14 +28,30 @@
import os
import shlex
import logging
+import re
from argparse import ArgumentParser, ArgumentError, ArgumentTypeError
from wic.engine import find_canned
from wic.partition import Partition
+from wic.misc import get_bitbake_var
logger = logging.getLogger('wic')
+__expand_var_regexp__ = re.compile(r"\${[^{}@\n\t :]+}")
+
+def expand_line(line):
+ while True:
+ m = __expand_var_regexp__.search(line)
+ if not m:
+ return line
+ key = m.group()[2:-1]
+ val = get_bitbake_var(key)
+ if val is None:
+ logger.warning("cannot expand variable %s" % key)
+ return line
+ line = line[:m.start()] + val + line[m.end():]
+
class KickStartError(Exception):
"""Custom exception."""
pass
@@ -190,6 +206,7 @@ class KickStart():
line = line.strip()
lineno += 1
if line and line[0] != '#':
+ line = expand_line(line)
try:
line_args = shlex.split(line)
parsed = parser.parse_args(line_args)
--
2.19.1.6.gbde171bbf5
--
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