OVMS3-idf/tools/kconfig_new/confserver.py
2019-09-11 14:40:57 +02:00

190 lines
6.1 KiB
Python
Executable file

#!/usr/bin/env python
#
# Long-running server process uses stdin & stdout to communicate JSON
# with a caller
#
from __future__ import print_function
import argparse
import json
import os
import sys
import confgen
from confgen import FatalError, __version__
try:
from . import kconfiglib
except Exception:
sys.path.insert(0, os.path.dirname(os.path.realpath(__file__)))
import kconfiglib
def main():
parser = argparse.ArgumentParser(description='confserver.py v%s - Config Generation Tool' % __version__, prog=os.path.basename(sys.argv[0]))
parser.add_argument('--config',
help='Project configuration settings',
required=True)
parser.add_argument('--kconfig',
help='KConfig file with config item definitions',
required=True)
parser.add_argument('--env', action='append', default=[],
help='Environment to set when evaluating the config file', metavar='NAME=VAL')
args = parser.parse_args()
try:
args.env = [ (name,value) for (name,value) in ( e.split("=",1) for e in args.env) ]
except ValueError:
print("--env arguments must each contain =. To unset an environment variable, use 'ENV='")
sys.exit(1)
for name, value in args.env:
os.environ[name] = value
print("Server running, waiting for requests on stdin...", file=sys.stderr)
run_server(args.kconfig, args.config)
def run_server(kconfig, sdkconfig):
config = kconfiglib.Kconfig(kconfig)
config.load_config(sdkconfig)
config_dict = confgen.get_json_values(config)
ranges_dict = get_ranges(config)
json.dump({"version": 1, "values" : config_dict, "ranges" : ranges_dict}, sys.stdout)
print("\n")
while True:
line = sys.stdin.readline()
if not line:
break
req = json.loads(line)
before = confgen.get_json_values(config)
before_ranges = get_ranges(config)
if "load" in req: # if we're loading a different sdkconfig, response should have all items in it
before = {}
before_ranges = {}
# if no new filename is supplied, use existing sdkconfig path, otherwise update the path
if req["load"] is None:
req["load"] = sdkconfig
else:
sdkconfig = req["load"]
if "save" in req:
if req["save"] is None:
req["save"] = sdkconfig
else:
sdkconfig = req["save"]
error = handle_request(config, req)
after = confgen.get_json_values(config)
after_ranges = get_ranges(config)
values_diff = diff(before, after)
ranges_diff = diff(before_ranges, after_ranges)
response = {"version" : 1, "values" : values_diff, "ranges" : ranges_diff}
if error:
for e in error:
print("Error: %s" % e, file=sys.stderr)
response["error"] = error
json.dump(response, sys.stdout)
print("\n")
def handle_request(config, req):
if not "version" in req:
return [ "All requests must have a 'version'" ]
if int(req["version"]) != 1:
return [ "Only version 1 requests supported" ]
error = []
if "load" in req:
print("Loading config from %s..." % req["load"], file=sys.stderr)
try:
config.load_config(req["load"])
except Exception as e:
error += [ "Failed to load from %s: %s" % (req["load"], e) ]
if "set" in req:
handle_set(config, error, req["set"])
if "save" in req:
try:
print("Saving config to %s..." % req["save"], file=sys.stderr)
confgen.write_config(config, req["save"])
except Exception as e:
error += [ "Failed to save to %s: %s" % (req["save"], e) ]
return error
def handle_set(config, error, to_set):
missing = [ k for k in to_set if not k in config.syms ]
if missing:
error.append("The following config symbol(s) were not found: %s" % (", ".join(missing)))
# replace name keys with the full config symbol for each key:
to_set = dict((config.syms[k],v) for (k,v) in to_set.items() if not k in missing)
# Work through the list of values to set, noting that
# some may not be immediately applicable (maybe they depend
# on another value which is being set). Therefore, defer
# knowing if any value is unsettable until then end
while len(to_set):
set_pass = [ (k,v) for (k,v) in to_set.items() if k.visibility ]
if not set_pass:
break # no visible keys left
for (sym,val) in set_pass:
if sym.type in (kconfiglib.BOOL, kconfiglib.TRISTATE):
if val == True:
sym.set_value(2)
elif val == False:
sym.set_value(0)
else:
error.append("Boolean symbol %s only accepts true/false values" % sym.name)
else:
sym.set_value(str(val))
print("Set %s" % sym.name)
del to_set[sym]
if len(to_set):
error.append("The following config symbol(s) were not visible so were not updated: %s" % (", ".join(s.name for s in to_set)))
def diff(before, after):
"""
Return a dictionary with the difference between 'before' and 'after' (either with the new value if changed,
or None as the value if a key in 'before' is missing in 'after'
"""
diff = dict((k,v) for (k,v) in after.items() if before.get(k, None) != v)
hidden = dict((k,None) for k in before if k not in after)
diff.update(hidden)
return diff
def get_ranges(config):
ranges_dict = {}
def handle_node(node):
sym = node.item
if not isinstance(sym, kconfiglib.Symbol):
return
active_range = sym.active_range
if active_range[0] is not None:
ranges_dict[sym.name] = active_range
config.walk_menu(handle_node)
return ranges_dict
if __name__ == '__main__':
try:
main()
except FatalError as e:
print("A fatal error occurred: %s" % e, file=sys.stderr)
sys.exit(2)