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|
# Parse a Steuermann Spec file
#
# This is an exyapps grammer in specfile.exy
%%
parser specfile:
ignore: "[ \r\t\n]+"
ignore: "#.*\n"
token END: "$"
token TABLE: "TABLE"
token HOST : "HOST"
token CMD: "CMD"
token OPT: "OPT"
token AFTER: "AFTER"
token name: "[a-zA-Z0-9_.-]+"
token STAR: "\*"
token cmdname: "[a-zA-Z0-9_.-]+"
token tablename: "[a-zA-Z0-9_.-]+"
token wildname: "[*?a-zA-Z0-9_.-]+"
token RUN: "RUN"
token LOCAL: "LOCAL"
token string: '"[^"]*"'
token SLASH: "/"
token COLON: ":"
rule start: table_list END {{ return table_list }}
rule table_list: table_section [ table_list ]
rule table_section:
TABLE tablename {{ table_name = tablename }}
HOST {{ hostlist = [ ] }}
(
name {{ hostlist.append(name) }}
)+
command_list
# command_list is a list of (command, pos) where command is the text from the file and pos is the location in the file
{{ self.data.add_command_list( table_name, hostlist, command_list ) }}
rule command_list:
# one or more commands, appended together into a list
{{ cmlist = [ ] }}
command {{ cmlist.append( command ) }}
[
command_list {{ cmlist += command_list }}
]
{{ return cmlist }}
| {{ return [ ] }}
rule command:
# a single command, including any number of AFTER clauses
CMD {{ cmd_pos = self._scanner.get_pos() }}
cmdname {{ cmd_name=cmdname; script=cmdname; x_after_clause = [ ] }}
[ RUN string {{ script = string[1:-1]; script_type='r' }}
| LOCAL string {{ script = string[1:-1]; script_type='l' }}
]
( {{ after_pos = self._scanner.get_pos() }}
AFTER optword after_spec {{ x_after_clause.append( (after_spec, optword, after_pos) ) }}
)*
{{ return ( cmd_name, script, script_type, x_after_clause, cmd_pos ) }}
# in the AFTER clause, you can say OPT to mean the node is optional (not an error if it does not exist)
rule optword:
OPT {{ return 0 }}
| {{ return 1 }}
rule after_spec:
wildname {{ rval = wildname }}
[ COLON wildname {{ rval = rval + ':' + wildname }} ]
[ SLASH wildname {{ rval = rval + '/' + wildname }} ]
{{ return rval }}
%%
|
