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