prometheus/config/parser.y

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// Copyright 2013 Prometheus Team
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
%{
package config
import "fmt"
import "github.com/prometheus/prometheus/model"
%}
%union {
num model.SampleValue
str string
stringSlice []string
labelSet model.LabelSet
}
%token <str> IDENTIFIER STRING
%token GLOBAL JOB
%token RULE_FILES
%token LABELS TARGETS ENDPOINTS
%type <stringSlice> string_array string_list rule_files_stat endpoints_stat
%type <labelSet> labels_stat label_assign label_assign_list
%start config
%%
config : /* empty */
| config config_stanza
;
config_stanza : GLOBAL '{' global_stat_list '}'
| JOB '{' job_stat_list '}'
{ PopJob() }
;
global_stat_list : /* empty */
| global_stat_list global_stat
;
global_stat : IDENTIFIER '=' STRING
{ parsedConfig.Global.SetOption($1, $3) }
| labels_stat
{ parsedConfig.Global.SetLabels($1) }
| rule_files_stat
{ parsedConfig.Global.AddRuleFiles($1) }
;
labels_stat : LABELS '{' label_assign_list '}'
{ $$ = $3 }
| LABELS '{' '}'
{ $$ = model.LabelSet{} }
;
label_assign_list : label_assign
{ $$ = $1 }
| label_assign_list ',' label_assign
{ for k, v := range $3 { $$[k] = v } }
;
label_assign : IDENTIFIER '=' STRING
{ $$ = model.LabelSet{ model.LabelName($1): model.LabelValue($3) } }
;
rule_files_stat : RULE_FILES '=' string_array
{ $$ = $3 }
;
job_stat_list : /* empty */
| job_stat_list job_stat
;
job_stat : IDENTIFIER '=' STRING
{ PushJobOption($1, $3) }
| TARGETS '{' targets_stat_list '}'
{ PushJobTargets() }
;
targets_stat_list : /* empty */
| targets_stat_list targets_stat
;
targets_stat : endpoints_stat
{ PushTargetEndpoints($1) }
| labels_stat
{ PushTargetLabels($1) }
;
endpoints_stat : ENDPOINTS '=' string_array
{ $$ = $3 }
;
string_array : '[' string_list ']'
{ $$ = $2 }
| '[' ']'
{ $$ = []string{} }
;
string_list : STRING
{ $$ = []string{$1} }
| string_list ',' STRING
{ $$ = append($$, $3) }
;
%%